use serde::{Deserialize, Serialize};
use sql_generation::{
    generation::{Arbitrary, ArbitraryFrom, GenerationContext, frequency, pick, pick_index},
    model::{
        query::{
            Create, Delete, Drop, Insert, Select,
            predicate::Predicate,
            select::{CompoundOperator, CompoundSelect, ResultColumn, SelectBody, SelectInner},
            transaction::{Begin, Commit, Rollback},
            update::Update,
        },
        table::SimValue,
    },
};
use turso_core::{LimboError, types};
use turso_parser::ast::{self, Distinctness};

use crate::{
    generation::Shadow as _, model::Query, profiles::query::QueryProfile, runner::env::SimulatorEnv,
};

use super::plan::{Assertion, Interaction, InteractionStats, ResultSet};

/// Properties are representations of executable specifications
/// about the database behavior.
#[derive(Debug, Clone, Serialize, Deserialize)]
pub(crate) enum Property {
    /// Insert-Select is a property in which the inserted row
    /// must be in the resulting rows of a select query that has a
    /// where clause that matches the inserted row.
    /// The execution of the property is as follows
    ///     INSERT INTO <t> VALUES (...)
    ///     I_0
    ///     I_1
    ///     ...
    ///     I_n
    ///     SELECT * FROM <t> WHERE <predicate>
    /// The interactions in the middle has the following constraints;
    /// - There will be no errors in the middle interactions.
    /// - The inserted row will not be deleted.
    /// - The inserted row will not be updated.
    /// - The table `t` will not be renamed, dropped, or altered.
    InsertValuesSelect {
        /// The insert query
        insert: Insert,
        /// Selected row index
        row_index: usize,
        /// Additional interactions in the middle of the property
        queries: Vec<Query>,
        /// The select query
        select: Select,
        /// Interactive query information if any
        interactive: Option<InteractiveQueryInfo>,
    },
    /// ReadYourUpdatesBack is a property in which the updated rows
    /// must be in the resulting rows of a select query that has a
    /// where clause that matches the updated row.
    /// The execution of the property is as follows
    ///     UPDATE <t> SET <set_cols=set_vals> WHERE <predicate>
    ///     SELECT <set_cols> FROM <t> WHERE <predicate>
    /// These interactions are executed in immediate succession
    /// just to verify the property that our updates did what they
    /// were supposed to do.
    ReadYourUpdatesBack {
        update: Update,
        select: Select,
    },
    /// TableHasExpectedContent is a property in which the table
    /// must have the expected content, i.e. all the insertions and
    /// updates and deletions should have been persisted in the way
    /// we think they were.
    /// The execution of the property is as follows
    ///     SELECT * FROM <t>
    ///     ASSERT <expected_content>
    TableHasExpectedContent {
        table: String,
    },
    /// Double Create Failure is a property in which creating
    /// the same table twice leads to an error.
    /// The execution of the property is as follows
    ///     CREATE TABLE <t> (...)
    ///     I_0
    ///     I_1
    ///     ...
    ///     I_n
    ///     CREATE TABLE <t> (...) -> Error
    /// The interactions in the middle has the following constraints;
    /// - There will be no errors in the middle interactions.
    /// - Table `t` will not be renamed or dropped.
    DoubleCreateFailure {
        /// The create query
        create: Create,
        /// Additional interactions in the middle of the property
        queries: Vec<Query>,
    },
    /// Select Limit is a property in which the select query
    /// has a limit clause that is respected by the query.
    /// The execution of the property is as follows
    ///     SELECT * FROM <t> WHERE <predicate> LIMIT <n>
    /// This property is a single-interaction property.
    /// The interaction has the following constraints;
    /// - The select query will respect the limit clause.
    SelectLimit {
        /// The select query
        select: Select,
    },
    /// Delete-Select is a property in which the deleted row
    /// must not be in the resulting rows of a select query that has a
    /// where clause that matches the deleted row. In practice, `p1` of
    /// the delete query will be used as the predicate for the select query,
    /// hence the select should return NO ROWS.
    /// The execution of the property is as follows
    ///     DELETE FROM <t> WHERE <predicate>
    ///     I_0
    ///     I_1
    ///     ...
    ///     I_n
    ///     SELECT * FROM <t> WHERE <predicate>
    /// The interactions in the middle has the following constraints;
    /// - There will be no errors in the middle interactions.
    /// - A row that holds for the predicate will not be inserted.
    /// - The table `t` will not be renamed, dropped, or altered.
    DeleteSelect {
        table: String,
        predicate: Predicate,
        queries: Vec<Query>,
    },
    /// Drop-Select is a property in which selecting from a dropped table
    /// should result in an error.
    /// The execution of the property is as follows
    ///     DROP TABLE <t>
    ///     I_0
    ///     I_1
    ///     ...
    ///     I_n
    ///     SELECT * FROM <t> WHERE <predicate> -> Error
    /// The interactions in the middle has the following constraints;
    /// - There will be no errors in the middle interactions.
    /// - The table `t` will not be created, no table will be renamed to `t`.
    DropSelect {
        table: String,
        queries: Vec<Query>,
        select: Select,
    },
    /// Select-Select-Optimizer is a property in which we test the optimizer by
    /// running two equivalent select queries, one with `SELECT <predicate> from <t>`
    /// and the other with `SELECT * from <t> WHERE <predicate>`. As highlighted by
    /// Rigger et al. in Non-Optimizing Reference Engine Construction(NoREC), SQLite
    /// tends to optimize `where` statements while keeping the result column expressions
    /// unoptimized. This property is used to test the optimizer. The property is successful
    /// if the two queries return the same number of rows.
    SelectSelectOptimizer {
        table: String,
        predicate: Predicate,
    },
    /// Where-True-False-Null is a property that tests the boolean logic implementation
    /// in the database. It relies on the fact that `P == true || P == false || P == null` should return true,
    /// as SQLite uses a ternary logic system. This property is invented in "Finding Bugs in Database Systems via Query Partitioning"
    /// by Rigger et al. and it is canonically called Ternary Logic Partitioning (TLP).
    WhereTrueFalseNull {
        select: Select,
        predicate: Predicate,
    },
    /// UNION-ALL-Preserves-Cardinality is a property that tests the UNION ALL operator
    /// implementation in the database. It relies on the fact that `SELECT * FROM <t
    /// > WHERE <predicate> UNION ALL SELECT * FROM <t> WHERE <predicate>`
    /// should return the same number of rows as `SELECT <predicate> FROM <t> WHERE <predicate>`.
    /// > The property is succesfull when the UNION ALL of 2 select queries returns the same number of rows
    /// > as the sum of the two select queries.
    UNIONAllPreservesCardinality {
        select: Select,
        where_clause: Predicate,
    },
    /// FsyncNoWait is a property which tests if we do not loose any data after not waiting for fsync.
    ///
    /// # Interactions
    /// - Executes the `query` without waiting for fsync
    /// - Drop all connections and Reopen the database
    /// - Execute the `query` again
    /// - Query tables to assert that the values were inserted
    ///
    FsyncNoWait {
        query: Query,
        tables: Vec<String>,
    },
    FaultyQuery {
        query: Query,
        tables: Vec<String>,
    },
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct InteractiveQueryInfo {
    start_with_immediate: bool,
    end_with_commit: bool,
}

impl Property {
    pub(crate) fn name(&self) -> &str {
        match self {
            Property::InsertValuesSelect { .. } => "Insert-Values-Select",
            Property::ReadYourUpdatesBack { .. } => "Read-Your-Updates-Back",
            Property::TableHasExpectedContent { .. } => "Table-Has-Expected-Content",
            Property::DoubleCreateFailure { .. } => "Double-Create-Failure",
            Property::SelectLimit { .. } => "Select-Limit",
            Property::DeleteSelect { .. } => "Delete-Select",
            Property::DropSelect { .. } => "Drop-Select",
            Property::SelectSelectOptimizer { .. } => "Select-Select-Optimizer",
            Property::WhereTrueFalseNull { .. } => "Where-True-False-Null",
            Property::FsyncNoWait { .. } => "FsyncNoWait",
            Property::FaultyQuery { .. } => "FaultyQuery",
            Property::UNIONAllPreservesCardinality { .. } => "UNION-All-Preserves-Cardinality",
        }
    }
    /// interactions construct a list of interactions, which is an executable representation of the property.
    /// the requirement of property -> vec<interaction> conversion emerges from the need to serialize the property,
    /// and `interaction` cannot be serialized directly.
    pub(crate) fn interactions(&self) -> Vec<Interaction> {
        match self {
            Property::TableHasExpectedContent { table } => {
                let table = table.to_string();
                let table_name = table.clone();
                let assumption = Interaction::Assumption(Assertion {
                    name: format!("table {} exists", table.clone()),
                    func: Box::new(move |_: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                        if env.tables.iter().any(|t| t.name == table_name) {
                            Ok(Ok(()))
                        } else {
                            Ok(Err(format!("table {table_name} does not exist")))
                        }
                    }),
                });

                let select_interaction = Interaction::Query(Query::Select(Select::simple(
                    table.clone(),
                    Predicate::true_(),
                )));

                let assertion = Interaction::Assertion(Assertion {
                    name: format!("table {} should have the expected content", table.clone()),
                    func: Box::new(move |stack: &Vec<ResultSet>, env| {
                        let rows = stack.last().unwrap();
                        let Ok(rows) = rows else {
                            return Ok(Err(format!("expected rows but got error: {rows:?}")));
                        };
                        let sim_table = env
                            .tables
                            .iter()
                            .find(|t| t.name == table)
                            .expect("table should be in enviroment");
                        if rows.len() != sim_table.rows.len() {
                            return Ok(Err(format!(
                                "expected {} rows but got {} for table {}",
                                sim_table.rows.len(),
                                rows.len(),
                                table.clone()
                            )));
                        }
                        for expected_row in sim_table.rows.iter() {
                            if !rows.contains(expected_row) {
                                return Ok(Err(format!(
                                    "expected row {:?} not found in table {}",
                                    expected_row,
                                    table.clone()
                                )));
                            }
                        }
                        Ok(Ok(()))
                    }),
                });

                vec![assumption, select_interaction, assertion]
            }
            Property::ReadYourUpdatesBack { update, select } => {
                let table = update.table().to_string();
                let assumption = Interaction::Assumption(Assertion {
                    name: format!("table {} exists", table.clone()),
                    func: Box::new(move |_: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                        if env.tables.iter().any(|t| t.name == table.clone()) {
                            Ok(Ok(()))
                        } else {
                            Ok(Err(format!("table {} does not exist", table.clone())))
                        }
                    }),
                });

                let update_interaction = Interaction::Query(Query::Update(update.clone()));
                let select_interaction = Interaction::Query(Query::Select(select.clone()));

                let update = update.clone();

                let table = update.table().to_string();

                let assertion = Interaction::Assertion(Assertion {
                    name: format!(
                        "updated rows should be found and have the updated values for table {}",
                        table.clone()
                    ),
                    func: Box::new(move |stack: &Vec<ResultSet>, _| {
                        let rows = stack.last().unwrap();
                        match rows {
                            Ok(rows) => {
                                for row in rows {
                                    for (i, (col, val)) in update.set_values.iter().enumerate() {
                                        if &row[i] != val {
                                            return Ok(Err(format!(
                                                "updated row {} has incorrect value for column {col}: expected {val}, got {}",
                                                i, row[i]
                                            )));
                                        }
                                    }
                                }
                                Ok(Ok(()))
                            }
                            Err(err) => Err(LimboError::InternalError(err.to_string())),
                        }
                    }),
                });

                vec![
                    assumption,
                    update_interaction,
                    select_interaction,
                    assertion,
                ]
            }
            Property::InsertValuesSelect {
                insert,
                row_index,
                queries,
                select,
                interactive,
            } => {
                let (table, values) = if let Insert::Values { table, values } = insert {
                    (table, values)
                } else {
                    unreachable!(
                        "insert query should be Insert::Values for Insert-Values-Select property"
                    )
                };
                // Check that the insert query has at least 1 value
                assert!(
                    !values.is_empty(),
                    "insert query should have at least 1 value"
                );

                // Pick a random row within the insert values
                let row = values[*row_index].clone();

                // Assume that the table exists
                let assumption = Interaction::Assumption(Assertion {
                    name: format!("table {} exists", insert.table()),
                    func: Box::new({
                        let table_name = table.clone();
                        move |_: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                            if env.tables.iter().any(|t| t.name == table_name) {
                                Ok(Ok(()))
                            } else {
                                Ok(Err(format!("table {table_name} does not exist")))
                            }
                        }
                    }),
                });

                let assertion = Interaction::Assertion(Assertion {
                    name: format!(
                        "row [{:?}] should be found in table {}, interactive={} commit={}, rollback={}",
                        row.iter().map(|v| v.to_string()).collect::<Vec<String>>(),
                        insert.table(),
                        interactive.is_some(),
                        interactive
                            .as_ref()
                            .map(|i| i.end_with_commit)
                            .unwrap_or(false),
                        interactive
                            .as_ref()
                            .map(|i| !i.end_with_commit)
                            .unwrap_or(false),
                    ),
                    func: Box::new(move |stack: &Vec<ResultSet>, _| {
                        let rows = stack.last().unwrap();
                        match rows {
                            Ok(rows) => {
                                let found = rows.iter().any(|r| r == &row);
                                if found {
                                    Ok(Ok(()))
                                } else {
                                    Ok(Err(format!(
                                        "row [{:?}] not found in table",
                                        row.iter().map(|v| v.to_string()).collect::<Vec<String>>()
                                    )))
                                }
                            }
                            Err(err) => Err(LimboError::InternalError(err.to_string())),
                        }
                    }),
                });

                let mut interactions = Vec::new();
                interactions.push(assumption);
                interactions.push(Interaction::Query(Query::Insert(insert.clone())));
                interactions.extend(queries.clone().into_iter().map(Interaction::Query));
                interactions.push(Interaction::Query(Query::Select(select.clone())));
                interactions.push(assertion);

                interactions
            }
            Property::DoubleCreateFailure { create, queries } => {
                let table_name = create.table.name.clone();

                let assumption = Interaction::Assumption(Assertion {
                    name: "Double-Create-Failure should not be called on an existing table"
                        .to_string(),
                    func: Box::new(move |_: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                        if !env.tables.iter().any(|t| t.name == table_name) {
                            Ok(Ok(()))
                        } else {
                            Ok(Err(format!("table {table_name} already exists")))
                        }
                    }),
                });

                let cq1 = Interaction::Query(Query::Create(create.clone()));
                let cq2 = Interaction::Query(Query::Create(create.clone()));

                let table_name = create.table.name.clone();

                let assertion = Interaction::Assertion(Assertion {
                            name:
                                "creating two tables with the name should result in a failure for the second query"
                                    .to_string(),
                            func: Box::new(move |stack: &Vec<ResultSet>, _| {
                                let last = stack.last().unwrap();
                                match last {
                                    Ok(success) => Ok(Err(format!("expected table creation to fail but it succeeded: {success:?}"))),
                                    Err(e) => {
                                        if e.to_string().to_lowercase().contains(&format!("table {table_name} already exists")) {
                                            Ok(Ok(()))
                                        } else {
                                            Ok(Err(format!("expected table already exists error, got: {e}")))
                                        }
                                    }
                                }
                            }),
                        });

                let mut interactions = Vec::new();
                interactions.push(assumption);
                interactions.push(cq1);
                interactions.extend(queries.clone().into_iter().map(Interaction::Query));
                interactions.push(cq2);
                interactions.push(assertion);

                interactions
            }
            Property::SelectLimit { select } => {
                let assumption = Interaction::Assumption(Assertion {
                    name: format!(
                        "table ({}) exists",
                        select
                            .dependencies()
                            .into_iter()
                            .collect::<Vec<_>>()
                            .join(", ")
                    ),
                    func: Box::new({
                        let table_name = select.dependencies();
                        move |_: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                            if table_name
                                .iter()
                                .all(|table| env.tables.iter().any(|t| t.name == *table))
                            {
                                Ok(Ok(()))
                            } else {
                                let missing_tables = table_name
                                    .iter()
                                    .filter(|t| !env.tables.iter().any(|t2| t2.name == **t))
                                    .collect::<Vec<&String>>();
                                Ok(Err(format!("missing tables: {missing_tables:?}")))
                            }
                        }
                    }),
                });

                let limit = select
                    .limit
                    .expect("Property::SelectLimit without a LIMIT clause");

                let assertion = Interaction::Assertion(Assertion {
                    name: "select query should respect the limit clause".to_string(),
                    func: Box::new(move |stack: &Vec<ResultSet>, _| {
                        let last = stack.last().unwrap();
                        match last {
                            Ok(rows) => {
                                if limit >= rows.len() {
                                    Ok(Ok(()))
                                } else {
                                    Ok(Err(format!(
                                        "limit {} violated: got {} rows",
                                        limit,
                                        rows.len()
                                    )))
                                }
                            }
                            Err(_) => Ok(Ok(())),
                        }
                    }),
                });

                vec![
                    assumption,
                    Interaction::Query(Query::Select(select.clone())),
                    assertion,
                ]
            }
            Property::DeleteSelect {
                table,
                predicate,
                queries,
            } => {
                let assumption = Interaction::Assumption(Assertion {
                    name: format!("table {table} exists"),
                    func: Box::new({
                        let table = table.clone();
                        move |_: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                            if env.tables.iter().any(|t| t.name == table) {
                                Ok(Ok(()))
                            } else {
                                {
                                    let available_tables: Vec<String> =
                                        env.tables.iter().map(|t| t.name.clone()).collect();
                                    Ok(Err(format!(
                                        "table \'{table}\' not found. Available tables: {available_tables:?}"
                                    )))
                                }
                            }
                        }
                    }),
                });

                let delete = Interaction::Query(Query::Delete(Delete {
                    table: table.clone(),
                    predicate: predicate.clone(),
                }));

                let select = Interaction::Query(Query::Select(Select::simple(
                    table.clone(),
                    predicate.clone(),
                )));

                let assertion = Interaction::Assertion(Assertion {
                    name: format!("`{select}` should return no values for table `{table}`",),
                    func: Box::new(move |stack: &Vec<ResultSet>, _| {
                        let rows = stack.last().unwrap();
                        match rows {
                            Ok(rows) => {
                                if rows.is_empty() {
                                    Ok(Ok(()))
                                } else {
                                    Ok(Err(format!(
                                        "expected no rows but got {} rows: {:?}",
                                        rows.len(),
                                        rows.iter()
                                            .map(|r| print_row(r))
                                            .collect::<Vec<String>>()
                                            .join(", ")
                                    )))
                                }
                            }
                            Err(err) => Err(LimboError::InternalError(err.to_string())),
                        }
                    }),
                });

                let mut interactions = Vec::new();
                interactions.push(assumption);
                interactions.push(delete);
                interactions.extend(queries.clone().into_iter().map(Interaction::Query));
                interactions.push(select);
                interactions.push(assertion);

                interactions
            }
            Property::DropSelect {
                table,
                queries,
                select,
            } => {
                let assumption = Interaction::Assumption(Assertion {
                    name: format!("table {table} exists"),
                    func: Box::new({
                        let table = table.clone();
                        move |_, env: &mut SimulatorEnv| {
                            if env.tables.iter().any(|t| t.name == table) {
                                Ok(Ok(()))
                            } else {
                                {
                                    let available_tables: Vec<String> =
                                        env.tables.iter().map(|t| t.name.clone()).collect();
                                    Ok(Err(format!(
                                        "table \'{table}\' not found. Available tables: {available_tables:?}"
                                    )))
                                }
                            }
                        }
                    }),
                });

                let table_name = table.clone();

                let assertion = Interaction::Assertion(Assertion {
                    name: format!("select query should result in an error for table '{table}'"),
                    func: Box::new(move |stack: &Vec<ResultSet>, _| {
                        let last = stack.last().unwrap();
                        match last {
                            Ok(success) => Ok(Err(format!(
                                "expected table creation to fail but it succeeded: {success:?}"
                            ))),
                            Err(e) => {
                                if e.to_string()
                                    .contains(&format!("Table {table_name} does not exist"))
                                {
                                    Ok(Ok(()))
                                } else {
                                    Ok(Err(format!(
                                        "expected table does not exist error, got: {e}"
                                    )))
                                }
                            }
                        }
                    }),
                });

                let drop = Interaction::Query(Query::Drop(Drop {
                    table: table.clone(),
                }));

                let select = Interaction::Query(Query::Select(select.clone()));

                let mut interactions = Vec::new();

                interactions.push(assumption);
                interactions.push(drop);
                interactions.extend(queries.clone().into_iter().map(Interaction::Query));
                interactions.push(select);
                interactions.push(assertion);

                interactions
            }
            Property::SelectSelectOptimizer { table, predicate } => {
                let assumption = Interaction::Assumption(Assertion {
                    name: format!("table {table} exists"),
                    func: Box::new({
                        let table = table.clone();
                        move |_: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                            if env.tables.iter().any(|t| t.name == table) {
                                Ok(Ok(()))
                            } else {
                                {
                                    let available_tables: Vec<String> =
                                        env.tables.iter().map(|t| t.name.clone()).collect();
                                    Ok(Err(format!(
                                        "table \'{table}\' not found. Available tables: {available_tables:?}"
                                    )))
                                }
                            }
                        }
                    }),
                });

                let select1 = Interaction::Query(Query::Select(Select::single(
                    table.clone(),
                    vec![ResultColumn::Expr(predicate.clone())],
                    Predicate::true_(),
                    None,
                    Distinctness::All,
                )));

                let select2_query = Query::Select(Select::simple(table.clone(), predicate.clone()));

                let select2 = Interaction::Query(select2_query);

                let assertion = Interaction::Assertion(Assertion {
                    name: "select queries should return the same amount of results".to_string(),
                    func: Box::new(move |stack: &Vec<ResultSet>, _| {
                        let select_star = stack.last().unwrap();
                        let select_predicate = stack.get(stack.len() - 2).unwrap();
                        match (select_predicate, select_star) {
                            (Ok(rows1), Ok(rows2)) => {
                                // If rows1 results have more than 1 column, there is a problem
                                if rows1.iter().any(|vs| vs.len() > 1) {
                                    return Err(LimboError::InternalError(
                                                "Select query without the star should return only one column".to_string(),
                                            ));
                                }
                                // Count the 1s in the select query without the star
                                let rows1_count = rows1
                                    .iter()
                                    .filter(|vs| {
                                        let v = vs.first().unwrap();
                                        v.as_bool()
                                    })
                                    .count();
                                tracing::debug!(
                                    "select1 returned {} rows, select2 returned {} rows",
                                    rows1_count,
                                    rows2.len()
                                );
                                if rows1_count == rows2.len() {
                                    Ok(Ok(()))
                                } else {
                                    Ok(Err(format!(
                                        "row counts don't match: {} vs {}",
                                        rows1_count,
                                        rows2.len()
                                    )))
                                }
                            }
                            (Err(e1), Err(e2)) => {
                                tracing::debug!("Error in select1 AND select2: {}, {}", e1, e2);
                                Ok(Ok(()))
                            }
                            (Err(e), _) | (_, Err(e)) => {
                                tracing::error!("Error in select1 OR select2: {}", e);
                                Err(LimboError::InternalError(e.to_string()))
                            }
                        }
                    }),
                });

                vec![assumption, select1, select2, assertion]
            }
            Property::FsyncNoWait { query, tables } => {
                let checks = assert_all_table_values(tables);
                Vec::from_iter(
                    std::iter::once(Interaction::FsyncQuery(query.clone())).chain(checks),
                )
            }
            Property::FaultyQuery { query, tables } => {
                let checks = assert_all_table_values(tables);
                let query_clone = query.clone();
                let assert = Assertion {
                    // A fault may not occur as we first signal we want a fault injected,
                    // then when IO is called the fault triggers. It may happen that a fault is injected
                    // but no IO happens right after it
                    name: "fault occured".to_string(),
                    func: Box::new(move |stack, env: &mut SimulatorEnv| {
                        let last = stack.last().unwrap();
                        match last {
                            Ok(_) => {
                                let _ = query_clone.shadow(&mut env.tables);
                                Ok(Ok(()))
                            }
                            Err(err) => {
                                // We cannot make any assumptions about the error content; all we are about is, if the statement errored,
                                // we don't shadow the results into the simulator env, i.e. we assume whatever the statement did was rolled back.
                                tracing::error!("Fault injection produced error: {err}");
                                Ok(Ok(()))
                            }
                        }
                    }),
                };
                let first = [
                    Interaction::FaultyQuery(query.clone()),
                    Interaction::Assertion(assert),
                ]
                .into_iter();
                Vec::from_iter(first.chain(checks))
            }
            Property::WhereTrueFalseNull { select, predicate } => {
                let assumption = Interaction::Assumption(Assertion {
                    name: format!(
                        "tables ({}) exists",
                        select
                            .dependencies()
                            .into_iter()
                            .collect::<Vec<_>>()
                            .join(", ")
                    ),
                    func: Box::new({
                        let tables = select.dependencies();
                        move |_: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                            if tables
                                .iter()
                                .all(|table| env.tables.iter().any(|t| t.name == *table))
                            {
                                Ok(Ok(()))
                            } else {
                                let missing_tables = tables
                                    .iter()
                                    .filter(|t| !env.tables.iter().any(|t2| t2.name == **t))
                                    .collect::<Vec<&String>>();
                                Ok(Err(format!("missing tables: {missing_tables:?}")))
                            }
                        }
                    }),
                });

                let old_predicate = select.body.select.where_clause.clone();

                let p_true = Predicate::and(vec![old_predicate.clone(), predicate.clone()]);
                let p_false = Predicate::and(vec![
                    old_predicate.clone(),
                    Predicate::not(predicate.clone()),
                ]);
                let p_null = Predicate::and(vec![
                    old_predicate.clone(),
                    Predicate::is(predicate.clone(), Predicate::null()),
                ]);

                let select_tlp = Select {
                    body: SelectBody {
                        select: Box::new(SelectInner {
                            distinctness: select.body.select.distinctness,
                            columns: select.body.select.columns.clone(),
                            from: select.body.select.from.clone(),
                            where_clause: p_true,
                            order_by: None,
                        }),
                        compounds: vec![
                            CompoundSelect {
                                operator: CompoundOperator::UnionAll,
                                select: Box::new(SelectInner {
                                    distinctness: select.body.select.distinctness,
                                    columns: select.body.select.columns.clone(),
                                    from: select.body.select.from.clone(),
                                    where_clause: p_false,
                                    order_by: None,
                                }),
                            },
                            CompoundSelect {
                                operator: CompoundOperator::UnionAll,
                                select: Box::new(SelectInner {
                                    distinctness: select.body.select.distinctness,
                                    columns: select.body.select.columns.clone(),
                                    from: select.body.select.from.clone(),
                                    where_clause: p_null,
                                    order_by: None,
                                }),
                            },
                        ],
                    },
                    limit: None,
                };

                let select = Interaction::Query(Query::Select(select.clone()));
                let select_tlp = Interaction::Query(Query::Select(select_tlp));

                // select and select_tlp should return the same rows
                let assertion = Interaction::Assertion(Assertion {
                    name: "select and select_tlp should return the same rows".to_string(),
                    func: Box::new(move |stack: &Vec<ResultSet>, _: &mut SimulatorEnv| {
                        if stack.len() < 2 {
                            return Err(LimboError::InternalError(
                                "Not enough result sets on the stack".to_string(),
                            ));
                        }

                        let select_result_set = stack.get(stack.len() - 2).unwrap();
                        let select_tlp_result_set = stack.last().unwrap();

                        match (select_result_set, select_tlp_result_set) {
                            (Ok(select_rows), Ok(select_tlp_rows)) => {
                                if select_rows.len() != select_tlp_rows.len() {
                                    return Ok(Err(format!(
                                        "row count mismatch: select returned {} rows, select_tlp returned {} rows",
                                        select_rows.len(),
                                        select_tlp_rows.len()
                                    )));
                                }
                                // Check if any row in select_rows is not in select_tlp_rows
                                for row in select_rows.iter() {
                                    if !select_tlp_rows.iter().any(|r| r == row) {
                                        tracing::debug!(
                                            "select and select_tlp returned different rows, ({}) is in select but not in select_tlp",
                                            row.iter()
                                                .map(|v| v.to_string())
                                                .collect::<Vec<String>>()
                                                .join(", ")
                                        );
                                        return Ok(Err(format!(
                                            "row mismatch: row [{}] exists in select results but not in select_tlp results",
                                            print_row(row)
                                        )));
                                    }
                                }
                                // Check if any row in select_tlp_rows is not in select_rows
                                for row in select_tlp_rows.iter() {
                                    if !select_rows.iter().any(|r| r == row) {
                                        tracing::debug!(
                                            "select and select_tlp returned different rows, ({}) is in select_tlp but not in select",
                                            row.iter()
                                                .map(|v| v.to_string())
                                                .collect::<Vec<String>>()
                                                .join(", ")
                                        );

                                        return Ok(Err(format!(
                                            "row mismatch: row [{}] exists in select_tlp but not in select",
                                            print_row(row)
                                        )));
                                    }
                                }
                                // If we reach here, the rows are the same
                                tracing::trace!(
                                    "select and select_tlp returned the same rows: {:?}",
                                    select_rows
                                );

                                Ok(Ok(()))
                            }
                            (Err(e), _) | (_, Err(e)) => {
                                tracing::error!("Error in select or select_tlp: {}", e);
                                Err(LimboError::InternalError(e.to_string()))
                            }
                        }
                    }),
                });

                vec![assumption, select, select_tlp, assertion]
            }
            Property::UNIONAllPreservesCardinality {
                select,
                where_clause,
            } => {
                let s1 = select.clone();
                let mut s2 = select.clone();
                s2.body.select.where_clause = where_clause.clone();
                let s3 = Select::compound(s1.clone(), s2.clone(), CompoundOperator::UnionAll);

                vec![
                    Interaction::Query(Query::Select(s1.clone())),
                    Interaction::Query(Query::Select(s2.clone())),
                    Interaction::Query(Query::Select(s3.clone())),
                    Interaction::Assertion(Assertion {
                        name: "UNION ALL should preserve cardinality".to_string(),
                        func: Box::new(move |stack: &Vec<ResultSet>, _: &mut SimulatorEnv| {
                            if stack.len() < 3 {
                                return Err(LimboError::InternalError(
                                    "Not enough result sets on the stack".to_string(),
                                ));
                            }

                            let select1 = stack.get(stack.len() - 3).unwrap();
                            let select2 = stack.get(stack.len() - 2).unwrap();
                            let union_all = stack.last().unwrap();

                            match (select1, select2, union_all) {
                                (Ok(rows1), Ok(rows2), Ok(union_rows)) => {
                                    let count1 = rows1.len();
                                    let count2 = rows2.len();
                                    let union_count = union_rows.len();
                                    if union_count == count1 + count2 {
                                        Ok(Ok(()))
                                    } else {
                                        Ok(Err(format!(
                                            "UNION ALL should preserve cardinality but it didn't: {count1} + {count2} != {union_count}"
                                        )))
                                    }
                                }
                                (Err(e), _, _) | (_, Err(e), _) | (_, _, Err(e)) => {
                                    tracing::error!("Error in select queries: {}", e);
                                    Err(LimboError::InternalError(e.to_string()))
                                }
                            }
                        }),
                    }),
                ]
            }
        }
    }
}

fn assert_all_table_values(tables: &[String]) -> impl Iterator<Item = Interaction> + use<'_> {
    tables.iter().flat_map(|table| {
        let select = Interaction::Query(Query::Select(Select::simple(
            table.clone(),
            Predicate::true_(),
        )));

        let assertion = Interaction::Assertion(Assertion {
            name: format!("table {table} should contain all of its expected values"),
            func: Box::new({
                let table = table.clone();
                move |stack: &Vec<ResultSet>, env: &mut SimulatorEnv| {
                    let table = env.tables.iter().find(|t| t.name == table).ok_or_else(|| {
                        LimboError::InternalError(format!(
                            "table {table} should exist in simulator env"
                        ))
                    })?;
                    let last = stack.last().unwrap();
                    match last {
                        Ok(vals) => {
                            // Check if all values in the table are present in the result set
                            // Find a value in the table that is not in the result set
                            let model_contains_db = table.rows.iter().find(|v| {
                                !vals.iter().any(|r| {
                                    &r == v
                                })
                            });
                            let db_contains_model = vals.iter().find(|v| {
                                !table.rows.iter().any(|r| &r == v)
                            });

                            if let Some(model_contains_db) = model_contains_db {
                                tracing::debug!(
                                    "table {} does not contain the expected values, the simulator model has more rows than the database: {:?}",
                                    table.name,
                                    print_row(model_contains_db)
                                );
                                Ok(Err(format!("table {} does not contain the expected values, the simulator model has more rows than the database: {:?}", table.name, print_row(model_contains_db))))
                            } else if let Some(db_contains_model) = db_contains_model {
                                tracing::debug!(
                                    "table {} does not contain the expected values, the database has more rows than the simulator model: {:?}",
                                    table.name,
                                    print_row(db_contains_model)
                                );
                                Ok(Err(format!("table {} does not contain the expected values, the database has more rows than the simulator model: {:?}", table.name, print_row(db_contains_model))))
                            } else {
                                Ok(Ok(()))
                            }
                        }
                        Err(err) => Err(LimboError::InternalError(format!("{err}"))),
                    }
                }
            }),
        });
        [select, assertion].into_iter()
    })
}

#[derive(Debug)]
pub(crate) struct Remaining {
    pub(crate) select: u32,
    pub(crate) insert: u32,
    pub(crate) create: u32,
    pub(crate) create_index: u32,
    pub(crate) delete: u32,
    pub(crate) update: u32,
    pub(crate) drop: u32,
}

pub(crate) fn remaining(
    max_interactions: u32,
    opts: &QueryProfile,
    stats: &InteractionStats,
) -> Remaining {
    let total_weight = opts.select_weight
        + opts.create_table_weight
        + opts.create_index_weight
        + opts.insert_weight
        + opts.update_weight
        + opts.delete_weight
        + opts.drop_table_weight;

    let total_select = (max_interactions * opts.select_weight) / total_weight;
    let total_insert = (max_interactions * opts.insert_weight) / total_weight;
    let total_create = (max_interactions * opts.create_table_weight) / total_weight;
    let total_create_index = (max_interactions * opts.create_index_weight) / total_weight;
    let total_delete = (max_interactions * opts.delete_weight) / total_weight;
    let total_update = (max_interactions * opts.update_weight) / total_weight;
    let total_drop = (max_interactions * opts.drop_table_weight) / total_weight;

    let remaining_select = total_select
        .checked_sub(stats.select_count)
        .unwrap_or_default();
    let remaining_insert = total_insert
        .checked_sub(stats.insert_count)
        .unwrap_or_default();
    let remaining_create = total_create
        .checked_sub(stats.create_count)
        .unwrap_or_default();
    let remaining_create_index = total_create_index
        .checked_sub(stats.create_index_count)
        .unwrap_or_default();
    let remaining_delete = total_delete
        .checked_sub(stats.delete_count)
        .unwrap_or_default();
    let remaining_update = total_update
        .checked_sub(stats.update_count)
        .unwrap_or_default();
    let remaining_drop = total_drop.checked_sub(stats.drop_count).unwrap_or_default();

    Remaining {
        select: remaining_select,
        insert: remaining_insert,
        create: remaining_create,
        create_index: remaining_create_index,
        delete: remaining_delete,
        drop: remaining_drop,
        update: remaining_update,
    }
}

fn property_insert_values_select<R: rand::Rng>(
    rng: &mut R,
    env: &SimulatorEnv,
    remaining: &Remaining,
) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);
    // Generate rows to insert
    let rows = (0..rng.random_range(1..=5))
        .map(|_| Vec::<SimValue>::arbitrary_from(rng, env, table))
        .collect::<Vec<_>>();

    // Pick a random row to select
    let row_index = pick_index(rows.len(), rng);
    let row = rows[row_index].clone();

    // Insert the rows
    let insert_query = Insert::Values {
        table: table.name.clone(),
        values: rows,
    };

    // Choose if we want queries to be executed in an interactive transaction
    let interactive = if rng.random_bool(0.5) {
        Some(InteractiveQueryInfo {
            start_with_immediate: rng.random_bool(0.5),
            end_with_commit: rng.random_bool(0.5),
        })
    } else {
        None
    };
    // Create random queries respecting the constraints
    let mut queries = Vec::new();
    // - [x] There will be no errors in the middle interactions. (this constraint is impossible to check, so this is just best effort)
    // - [x] The inserted row will not be deleted.
    // - [x] The inserted row will not be updated.
    // - [ ] The table `t` will not be renamed, dropped, or altered. (todo: add this constraint once ALTER or DROP is implemented)
    if let Some(ref interactive) = interactive {
        queries.push(Query::Begin(Begin {
            immediate: interactive.start_with_immediate,
        }));
    }
    for _ in 0..rng.random_range(0..3) {
        let query = Query::arbitrary_from(rng, env, remaining);
        match &query {
            Query::Delete(Delete {
                table: t,
                predicate,
            }) => {
                // The inserted row will not be deleted.
                if t == &table.name && predicate.test(&row, table) {
                    continue;
                }
            }
            Query::Create(Create { table: t }) => {
                // There will be no errors in the middle interactions.
                // - Creating the same table is an error
                if t.name == table.name {
                    continue;
                }
            }
            Query::Update(Update {
                table: t,
                set_values: _,
                predicate,
            }) => {
                // The inserted row will not be updated.
                if t == &table.name && predicate.test(&row, table) {
                    continue;
                }
            }
            _ => (),
        }
        queries.push(query);
    }
    if let Some(ref interactive) = interactive {
        queries.push(if interactive.end_with_commit {
            Query::Commit(Commit)
        } else {
            Query::Rollback(Rollback)
        });
    }

    // Select the row
    let select_query = Select::simple(
        table.name.clone(),
        Predicate::arbitrary_from(rng, env, (table, &row)),
    );

    Property::InsertValuesSelect {
        insert: insert_query,
        row_index,
        queries,
        select: select_query,
        interactive,
    }
}

fn property_read_your_updates_back<R: rand::Rng>(rng: &mut R, env: &SimulatorEnv) -> Property {
    // e.g. UPDATE t SET a=1, b=2 WHERE c=1;
    let update = Update::arbitrary(rng, env);
    // e.g. SELECT a, b FROM t WHERE c=1;
    let select = Select::single(
        update.table().to_string(),
        update
            .set_values
            .iter()
            .map(|(col, _)| ResultColumn::Column(col.clone()))
            .collect(),
        update.predicate.clone(),
        None,
        Distinctness::All,
    );

    Property::ReadYourUpdatesBack { update, select }
}

fn property_table_has_expected_content<R: rand::Rng>(rng: &mut R, env: &SimulatorEnv) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);
    Property::TableHasExpectedContent {
        table: table.name.clone(),
    }
}

fn property_select_limit<R: rand::Rng>(rng: &mut R, env: &SimulatorEnv) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);
    // Select the table
    let select = Select::single(
        table.name.clone(),
        vec![ResultColumn::Star],
        Predicate::arbitrary_from(rng, env, table),
        Some(rng.random_range(1..=5)),
        Distinctness::All,
    );
    Property::SelectLimit { select }
}

fn property_double_create_failure<R: rand::Rng>(
    rng: &mut R,
    env: &SimulatorEnv,
    remaining: &Remaining,
) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);
    // Create the table
    let create_query = Create {
        table: table.clone(),
    };

    // Create random queries respecting the constraints
    let mut queries = Vec::new();
    // The interactions in the middle has the following constraints;
    // - [x] There will be no errors in the middle interactions.(best effort)
    // - [ ] Table `t` will not be renamed or dropped.(todo: add this constraint once ALTER or DROP is implemented)
    for _ in 0..rng.random_range(0..3) {
        let query = Query::arbitrary_from(rng, env, remaining);
        if let Query::Create(Create { table: t }) = &query {
            // There will be no errors in the middle interactions.
            // - Creating the same table is an error
            if t.name == table.name {
                continue;
            }
        }
        queries.push(query);
    }

    Property::DoubleCreateFailure {
        create: create_query,
        queries,
    }
}

fn property_delete_select<R: rand::Rng>(
    rng: &mut R,
    env: &SimulatorEnv,
    remaining: &Remaining,
) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);
    // Generate a random predicate
    let predicate = Predicate::arbitrary_from(rng, env, table);

    // Create random queries respecting the constraints
    let mut queries = Vec::new();
    // - [x] There will be no errors in the middle interactions. (this constraint is impossible to check, so this is just best effort)
    // - [x] A row that holds for the predicate will not be inserted.
    // - [ ] The table `t` will not be renamed, dropped, or altered. (todo: add this constraint once ALTER or DROP is implemented)
    for _ in 0..rng.random_range(0..3) {
        let query = Query::arbitrary_from(rng, env, remaining);
        match &query {
            Query::Insert(Insert::Values { table: t, values }) => {
                // A row that holds for the predicate will not be inserted.
                if t == &table.name && values.iter().any(|v| predicate.test(v, table)) {
                    continue;
                }
            }
            Query::Insert(Insert::Select {
                table: t,
                select: _,
            }) => {
                // A row that holds for the predicate will not be inserted.
                if t == &table.name {
                    continue;
                }
            }
            Query::Update(Update { table: t, .. }) => {
                // A row that holds for the predicate will not be updated.
                if t == &table.name {
                    continue;
                }
            }
            Query::Create(Create { table: t }) => {
                // There will be no errors in the middle interactions.
                // - Creating the same table is an error
                if t.name == table.name {
                    continue;
                }
            }
            _ => (),
        }
        queries.push(query);
    }

    Property::DeleteSelect {
        table: table.name.clone(),
        predicate,
        queries,
    }
}

fn property_drop_select<R: rand::Rng>(
    rng: &mut R,
    env: &SimulatorEnv,
    remaining: &Remaining,
) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);

    // Create random queries respecting the constraints
    let mut queries = Vec::new();
    // - [x] There will be no errors in the middle interactions. (this constraint is impossible to check, so this is just best effort)
    // - [-] The table `t` will not be created, no table will be renamed to `t`. (todo: update this constraint once ALTER is implemented)
    for _ in 0..rng.random_range(0..3) {
        let query = Query::arbitrary_from(rng, env, remaining);
        if let Query::Create(Create { table: t }) = &query {
            // - The table `t` will not be created
            if t.name == table.name {
                continue;
            }
        }
        queries.push(query);
    }

    let select = Select::simple(
        table.name.clone(),
        Predicate::arbitrary_from(rng, env, table),
    );

    Property::DropSelect {
        table: table.name.clone(),
        queries,
        select,
    }
}

fn property_select_select_optimizer<R: rand::Rng>(rng: &mut R, env: &SimulatorEnv) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);
    // Generate a random predicate
    let predicate = Predicate::arbitrary_from(rng, env, table);
    // Transform into a Binary predicate to force values to be casted to a bool
    let expr = ast::Expr::Binary(
        Box::new(predicate.0),
        ast::Operator::And,
        Box::new(Predicate::true_().0),
    );

    Property::SelectSelectOptimizer {
        table: table.name.clone(),
        predicate: Predicate(expr),
    }
}

fn property_where_true_false_null<R: rand::Rng>(rng: &mut R, env: &SimulatorEnv) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);
    // Generate a random predicate
    let p1 = Predicate::arbitrary_from(rng, env, table);
    let p2 = Predicate::arbitrary_from(rng, env, table);

    // Create the select query
    let select = Select::simple(table.name.clone(), p1);

    Property::WhereTrueFalseNull {
        select,
        predicate: p2,
    }
}

fn property_union_all_preserves_cardinality<R: rand::Rng>(
    rng: &mut R,
    env: &SimulatorEnv,
) -> Property {
    // Get a random table
    let table = pick(&env.tables, rng);
    // Generate a random predicate
    let p1 = Predicate::arbitrary_from(rng, env, table);
    let p2 = Predicate::arbitrary_from(rng, env, table);

    // Create the select query
    let select = Select::single(
        table.name.clone(),
        vec![ResultColumn::Star],
        p1,
        None,
        Distinctness::All,
    );

    Property::UNIONAllPreservesCardinality {
        select,
        where_clause: p2,
    }
}

fn property_fsync_no_wait<R: rand::Rng>(
    rng: &mut R,
    env: &SimulatorEnv,
    remaining: &Remaining,
) -> Property {
    Property::FsyncNoWait {
        query: Query::arbitrary_from(rng, env, remaining),
        tables: env.tables.iter().map(|t| t.name.clone()).collect(),
    }
}

fn property_faulty_query<R: rand::Rng>(
    rng: &mut R,
    env: &SimulatorEnv,
    remaining: &Remaining,
) -> Property {
    Property::FaultyQuery {
        query: Query::arbitrary_from(rng, env, remaining),
        tables: env.tables.iter().map(|t| t.name.clone()).collect(),
    }
}

impl ArbitraryFrom<(&SimulatorEnv, &InteractionStats)> for Property {
    fn arbitrary_from<R: rand::Rng, C: GenerationContext>(
        rng: &mut R,
        context: &C,
        (env, stats): (&SimulatorEnv, &InteractionStats),
    ) -> Self {
        let opts = context.opts();
        let remaining_ = remaining(env.opts.max_interactions, &env.profile.query, stats);

        frequency(
            vec![
                (
                    if !env.opts.disable_insert_values_select {
                        u32::min(remaining_.select, remaining_.insert)
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_insert_values_select(rng, env, &remaining_)),
                ),
                (
                    remaining_.select,
                    Box::new(|rng: &mut R| property_table_has_expected_content(rng, env)),
                ),
                (
                    u32::min(remaining_.select, remaining_.insert),
                    Box::new(|rng: &mut R| property_read_your_updates_back(rng, env)),
                ),
                (
                    if !env.opts.disable_double_create_failure {
                        remaining_.create / 2
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_double_create_failure(rng, env, &remaining_)),
                ),
                (
                    if !env.opts.disable_select_limit {
                        remaining_.select
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_select_limit(rng, env)),
                ),
                (
                    if !env.opts.disable_delete_select {
                        u32::min(remaining_.select, remaining_.insert).min(remaining_.delete)
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_delete_select(rng, env, &remaining_)),
                ),
                (
                    if !env.opts.disable_drop_select {
                        // remaining_.drop
                        0
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_drop_select(rng, env, &remaining_)),
                ),
                (
                    if !env.opts.disable_select_optimizer {
                        remaining_.select / 2
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_select_select_optimizer(rng, env)),
                ),
                (
                    if opts.indexes && !env.opts.disable_where_true_false_null {
                        remaining_.select / 2
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_where_true_false_null(rng, env)),
                ),
                (
                    if opts.indexes && !env.opts.disable_union_all_preserves_cardinality {
                        remaining_.select / 3
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_union_all_preserves_cardinality(rng, env)),
                ),
                (
                    if env.profile.io.enable && !env.opts.disable_fsync_no_wait {
                        50 // Freestyle number
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_fsync_no_wait(rng, env, &remaining_)),
                ),
                (
                    if env.profile.io.enable
                        && env.profile.io.fault.enable
                        && !env.opts.disable_faulty_query
                    {
                        20
                    } else {
                        0
                    },
                    Box::new(|rng: &mut R| property_faulty_query(rng, env, &remaining_)),
                ),
            ],
            rng,
        )
    }
}

fn print_row(row: &[SimValue]) -> String {
    row.iter()
        .map(|v| match &v.0 {
            types::Value::Null => "NULL".to_string(),
            types::Value::Integer(i) => i.to_string(),
            types::Value::Float(f) => f.to_string(),
            types::Value::Text(t) => t.to_string(),
            types::Value::Blob(b) => format!(
                "X'{}'",
                b.iter()
                    .fold(String::new(), |acc, b| acc + &format!("{b:02X}"))
            ),
        })
        .collect::<Vec<String>>()
        .join(", ")
}