#!/usr/bin/env tclsh

set testdir [file dirname $argv0]
source $testdir/tester.tcl


# Test: Create an AUTOINCREMENT table and verify sqlite_sequence is also created.
do_execsql_test_on_specific_db {:memory:} autoinc-create-sequence-table {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;
} {sqlite_sequence t1}

# Test: The sqlite_sequence table is initially empty after table creation.
do_execsql_test_on_specific_db {:memory:} autoinc-sequence-table-is-initially-empty {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    SELECT * FROM sqlite_sequence;
} {}

# Test: You cannot drop the sqlite_sequence table.
do_execsql_test_in_memory_any_error autoinc-fail-drop-sequence-table {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    DROP TABLE sqlite_sequence;
}

# Test: You cannot create an index on the sqlite_sequence table.
do_execsql_test_in_memory_any_error autoinc-fail-index-sequence-table {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    CREATE INDEX seqidx ON sqlite_sequence(name);
}

# Test: First insert populates sqlite_sequence.
do_execsql_test_on_specific_db {:memory:} autoinc-first-insert-populates-sequence {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t1 VALUES(12,34);
    SELECT * FROM sqlite_sequence;
} {t1|12}

# Test: Inserting a value larger than the current sequence updates the sequence.
do_execsql_test_on_specific_db {:memory:} autoinc-larger-insert-updates-sequence {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t1 VALUES(12,34);
    INSERT INTO t1 VALUES(123,456);
    SELECT * FROM sqlite_sequence;
} {t1|123}

# Test: Inserting NULL generates a key one greater than the max.
do_execsql_test_on_specific_db {:memory:} autoinc-null-insert-increments-sequence {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t1 VALUES(123,456);
    INSERT INTO t1 VALUES(NULL,567);
    SELECT * FROM sqlite_sequence;
} {t1|124}

# Test: Sequence value is not decreased after a DELETE.
do_execsql_test_on_specific_db {:memory:} autoinc-sequence-not-decremented-by-delete {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t1 VALUES(123,456);
    INSERT INTO t1 VALUES(NULL,567);
    DELETE FROM t1 WHERE y=567;
    SELECT * FROM sqlite_sequence;
} {t1|124}

# Test: A NULL insert after a DELETE continues from the previous high-water mark.
do_execsql_test_on_specific_db {:memory:} autoinc-insert-after-delete-uses-high-water-mark {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t1 VALUES(125, 1);
    DELETE FROM t1;
    INSERT INTO t1 VALUES(NULL, 2);
    SELECT x FROM t1;
} {126}

# Test: Clearing a table does not reset the sequence.
do_execsql_test_on_specific_db {:memory:} autoinc-delete-all-does-not-reset-sequence {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t1 VALUES(125, 456);
    DELETE FROM t1;
    SELECT * FROM sqlite_sequence;
} {t1|125}

# Test: Manually updating the sequence table affects the next generated key.
do_execsql_test_on_specific_db {:memory:} autoinc-manual-update-to-sequence-table {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t1 VALUES(1, 1);
    UPDATE sqlite_sequence SET seq=1234 WHERE name='t1';
    INSERT INTO t1 VALUES(NULL, 2);
    SELECT * FROM t1 ORDER BY x;
} {1|1 1235|2}

# Test: AUTOINCREMENT works for multiple tables independently.
do_execsql_test_on_specific_db {:memory:} autoinc-multiple-tables {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    CREATE TABLE t2(d, e INTEGER PRIMARY KEY AUTOINCREMENT, f);
    CREATE TABLE t3(g INTEGER PRIMARY KEY AUTOINCREMENT, h);
    INSERT INTO t1(y) VALUES('a');
    INSERT INTO t2(d) VALUES('b');
    INSERT INTO t2(d) VALUES('c');
    INSERT INTO t3(h) VALUES('d');
    INSERT INTO t1(x) VALUES(100);
    SELECT name, seq FROM sqlite_sequence ORDER BY name;
} {t1|100 t2|2 t3|1}

# Test: Dropping an AUTOINCREMENT table removes its entry from sqlite_sequence.
do_execsql_test_on_specific_db {:memory:} autoinc-drop-table-removes-sequence-entry {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    CREATE TABLE t2(d, e INTEGER PRIMARY KEY AUTOINCREMENT, f);
    INSERT INTO t1(y) VALUES('a');
    INSERT INTO t2(d) VALUES('b');
    DROP TABLE t1;
    SELECT name FROM sqlite_sequence;
} {t2}

# Test: When the last AUTOINCREMENT table is dropped, the sequence table remains but is empty.
do_execsql_test_on_specific_db {:memory:} autoinc-drop-last-table-empties-sequence {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    DROP TABLE t1;
    SELECT * FROM sqlite_sequence;
} {}

# Test: AUTOINCREMENT fails if the maximum rowid is reached. (Assumes 64-bit rowid)
do_execsql_test_in_memory_any_error autoinc-fail-on-max-rowid {
    CREATE TABLE t6(v INTEGER PRIMARY KEY AUTOINCREMENT, w);
    INSERT INTO t6 VALUES(9223372036854775807, 1);
    INSERT INTO t6 VALUES(NULL, 2);
}

# Test: AUTOINCREMENT keyword is allowed in a separate PRIMARY KEY clause.
do_execsql_test_on_specific_db {:memory:} autoinc-keyword-in-pk-clause {
    CREATE TABLE t7(x INTEGER, y REAL, PRIMARY KEY(x AUTOINCREMENT));
    INSERT INTO t7(y) VALUES(123);
    INSERT INTO t7(y) VALUES(234);
    DELETE FROM t7;
    INSERT INTO t7(y) VALUES(345);
    SELECT * FROM t7;
} {3|345.0}

# Test: AUTOINCREMENT fails if the primary key is not an INTEGER.
do_execsql_test_in_memory_any_error autoinc-fail-on-non-integer-pk {
    CREATE TABLE t8(x TEXT PRIMARY KEY AUTOINCREMENT);
}

# Test: An empty INSERT...SELECT does not damage the sequence table. (Ticket #3148)
do_execsql_test_on_specific_db {:memory:} autoinc-empty-insert-select-is-safe {
    CREATE TABLE t2(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    INSERT INTO t2 VALUES(NULL, 1);
    CREATE TABLE t3(a INTEGER PRIMARY KEY AUTOINCREMENT, b);
    INSERT INTO t3 SELECT * FROM t2 WHERE y > 1;
    SELECT * FROM sqlite_sequence WHERE name='t3';
} {t3|0}

# Test: AUTOINCREMENT with the xfer optimization. (Ticket 7b3328086a5c1)
do_execsql_test_on_specific_db {:memory:} autoinc-with-xfer-optimization {
    CREATE TABLE t10a(a INTEGER PRIMARY KEY AUTOINCREMENT, b UNIQUE);
    INSERT INTO t10a VALUES(888,9999);
    CREATE TABLE t10b(x INTEGER PRIMARY KEY AUTOINCREMENT, y UNIQUE);
    INSERT INTO t10b SELECT * FROM t10a;
    SELECT * FROM sqlite_sequence ORDER BY name;
} {t10a|888 t10b|888}

# Test: AUTOINCREMENT works correctly with UPSERT.
do_execsql_test_on_specific_db {:memory:} autoinc-with-upsert {
    CREATE TABLE t11(a INTEGER PRIMARY KEY AUTOINCREMENT, b UNIQUE);
    INSERT INTO t11(a,b) VALUES(2,3),(5,6),(4,3),(1,2)
        ON CONFLICT(b) DO UPDATE SET a=a+1000;
    SELECT seq FROM sqlite_sequence WHERE name='t11';
} {5}


# refer https://github.com/tursodatabase/turso/pull/2983#issuecomment-3322404270 was discovered while adding autoincr to fuzz tests
do_execsql_test_on_specific_db {:memory:} autoinc-conflict-on-nothing {
    CREATE TABLE t (id INTEGER PRIMARY KEY AUTOINCREMENT, k TEXT);
    CREATE UNIQUE INDEX idx_k_partial ON t(k) WHERE id > 1;
    INSERT INTO t (k) VALUES ('a');
    INSERT INTO t (k) VALUES ('a');
    INSERT INTO t (k) VALUES ('a') ON CONFLICT DO NOTHING;
    INSERT INTO t (k) VALUES ('b');
    SELECT * FROM t ORDER BY id;
} {1|a 2|a 4|b}

# https://github.com/tursodatabase/turso/issues/3664
do_execsql_test_on_specific_db {:memory:} autoinc-skips-manually-updated-pk {
    CREATE TABLE t(a INTEGER PRIMARY KEY AUTOINCREMENT);
    INSERT INTO t DEFAULT VALUES;
    select * from sqlite_sequence;
    UPDATE t SET a = a + 1;
    SELECT * FROM sqlite_sequence;
    INSERT INTO t DEFAULT VALUES;
    SELECT * FROM sqlite_sequence;
} {t|1
t|1
t|3}