use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Hash)]
pub enum SortOrder {
    Asc,
    Desc,
}

impl std::fmt::Display for SortOrder {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            SortOrder::Asc => write!(f, "ASC"),
            SortOrder::Desc => write!(f, "DESC"),
        }
    }
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Hash)]
pub(crate) struct CreateIndex {
    pub(crate) index_name: String,
    pub(crate) table_name: String,
    pub(crate) columns: Vec<(String, SortOrder)>,
}

impl std::fmt::Display for CreateIndex {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(
            f,
            "CREATE INDEX {} ON {} ({})",
            self.index_name,
            self.table_name,
            self.columns
                .iter()
                .map(|(name, order)| format!("{name} {order}"))
                .collect::<Vec<String>>()
                .join(", ")
        )
    }
}