// Copyright (c) 2023-2026 ParadeDB, Inc.
//
// This file is part of ParadeDB - Postgres for Search and Analytics
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.

#![allow(unused_variables, unused_imports)]
mod fixtures;

use std::path::PathBuf;

use fixtures::*;
use pretty_assertions::assert_eq;
use rstest::*;
use serde_json::Value;
use sqlx::PgConnection;

fn fmt_err<T: std::error::Error>(err: T) -> String {
    format!("unexpected error, received: {err}")
}

#[rstest]
fn invalid_create_index(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'public')"
        .execute(&mut conn);

    match r#"CREATE INDEX index_config_index ON index_config
        USING bm25 (id) "#
        .execute_result(&mut conn)
    {
        Ok(_) => panic!("should fail with no key_field"),
        Err(err) => assert_eq!(
            err.to_string(),
            "error returned from database: index should have a `WITH (key_field='...')` option"
        ),
    };
}

#[rstest]
fn prevent_duplicate(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, description) WITH (key_field='id')"#
        .execute(&mut conn);

    match r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, description) WITH (key_field='id')"#
        .execute_result(&mut conn)
    {
        Ok(_) => panic!("should fail with relation already exists"),
        Err(err) => assert!(
            err.to_string().contains("already exists"),
            "{}",
            fmt_err(err)
        ),
    };
}

#[rstest]
async fn drop_column(mut conn: PgConnection) {
    r#"
    CREATE TABLE f_table (
        id SERIAL PRIMARY KEY,
        category TEXT
    );

    CREATE TABLE test_table (
        id SERIAL PRIMARY KEY,
        fkey INTEGER REFERENCES f_table ON UPDATE CASCADE ON DELETE RESTRICT,
        fulltext TEXT
    );

    INSERT INTO f_table (category) VALUES ('cat_a'), ('cat_b'), ('cat_c');
    INSERT INTO test_table (fkey, fulltext) VALUES (1, 'abc'), (1, 'def'), (2, 'ghi'), (3, 'jkl');
    "#
    .execute(&mut conn);

    r#"CREATE INDEX test_index ON test_table
        USING bm25 (id, fulltext) WITH (key_field='id')"#
        .execute(&mut conn);

    r#"DROP INDEX test_index CASCADE;
    ALTER TABLE test_table DROP COLUMN fkey;

    CREATE INDEX test_index ON test_table
        USING bm25 (id, fulltext) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('test_index')".fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("fulltext".into(), "Str".into()));
    assert_eq!(rows[2], ("id".into(), "I64".into()));
}

#[rstest]
fn default_text_field(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, description) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("description".into(), "Str".into()));
    assert_eq!(rows[2], ("id".into(), "I64".into()));
}

#[rstest]
fn text_field_with_options(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, description)
        WITH (key_field='id', text_fields='{"description": {"tokenizer": {"type": "default", "normalizer": "raw"}, "record": "freq", "fast": true}}');
"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("description".into(), "Str".into()));
    assert_eq!(rows[2], ("id".into(), "I64".into()));
}

#[rstest]
fn multiple_text_fields(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config

        USING bm25 (id, description, category)
        WITH (
            key_field='id',
            text_fields='{"description": {"tokenizer": {"type": "default", "normalizer": "raw"}, "record": "freq", "fast": true}}'
        );
        "#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("category".into(), "Str".into()));
    assert_eq!(rows[1], ("ctid".into(), "U64".into()));
    assert_eq!(rows[2], ("description".into(), "Str".into()));
    assert_eq!(rows[3], ("id".into(), "I64".into()));
}

#[rstest]
fn default_numeric_field(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, rating) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("id".into(), "I64".into()));
    assert_eq!(rows[2], ("rating".into(), "I64".into()));
}

#[rstest]
fn numeric_field_with_options(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, rating) WITH (key_field='id', numeric_fields='{"rating": {"fast": true}}')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("id".into(), "I64".into()));
    assert_eq!(rows[2], ("rating".into(), "I64".into()));
}

#[rstest]
fn default_boolean_field(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, in_stock) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("id".into(), "I64".into()));
    assert_eq!(rows[2], ("in_stock".into(), "Bool".into()));
}

#[rstest]
fn boolean_field_with_options(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, in_stock) WITH (key_field='id', boolean_fields='{"in_stock": {"fast": false}}')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("id".into(), "I64".into()));
    assert_eq!(rows[2], ("in_stock".into(), "Bool".into()));
}

#[rstest]
fn default_json_field(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, metadata) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("id".into(), "I64".into()));
    assert_eq!(rows[2], ("metadata".into(), "JsonObject".into()));
}

#[rstest]
fn json_field_with_options(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, metadata)
        WITH (
            key_field='id',
            json_fields='{"metadata": {"fast": true, "expand_dots": false, "tokenizer": {"type": "raw", "normalizer": "raw"}}}'
        )"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("id".into(), "I64".into()));
    assert_eq!(rows[2], ("metadata".into(), "JsonObject".into()));
}

#[rstest]
fn default_datetime_field(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, created_at, last_updated_date) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("created_at".into(), "Date".into()));
    assert_eq!(rows[1], ("ctid".into(), "U64".into()));
    assert_eq!(rows[2], ("id".into(), "I64".into()));
    assert_eq!(rows[3], ("last_updated_date".into(), "Date".into()));
}

#[rstest]
fn datetime_field_with_options(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, created_at, last_updated_date)
        WITH (key_field='id', datetime_fields='{"created_at": {"fast": true}, "last_updated_date": {"fast": false}}')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("created_at".into(), "Date".into()));
    assert_eq!(rows[1], ("ctid".into(), "U64".into()));
    assert_eq!(rows[2], ("id".into(), "I64".into()));
    assert_eq!(rows[3], ("last_updated_date".into(), "Date".into()));
}

#[rstest]
fn multiple_fields(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, description, category, rating, in_stock, metadata) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index')"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("category".into(), "Str".into()));
    assert_eq!(rows[1], ("ctid".into(), "U64".into()));
    assert_eq!(rows[2], ("description".into(), "Str".into()));
    assert_eq!(rows[3], ("id".into(), "I64".into()));
    assert_eq!(rows[4], ("in_stock".into(), "Bool".into()));
    assert_eq!(rows[5], ("metadata".into(), "JsonObject".into()));
    assert_eq!(rows[6], ("rating".into(), "I64".into()));
}

#[rstest]
fn missing_schema_index(mut conn: PgConnection) {
    match "SELECT paradedb.schema('paradedb.missing_bm25_index')".fetch_result::<(i64,)>(&mut conn)
    {
        Err(err) => assert!(err
            .to_string()
            .contains(r#"relation "paradedb.missing_bm25_index" does not exist"#)),
        _ => panic!("non-existing index should throw an error"),
    }
}

#[rstest]
fn null_values(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    "INSERT INTO paradedb.index_config (description, category, rating) VALUES ('Null Item 1', NULL, NULL), ('Null Item 2', NULL, 2)"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, description, category, rating, in_stock, metadata) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, Option<String>, Option<i32>)> = "
        SELECT description, category, rating
        FROM paradedb.index_config WHERE index_config @@@ 'description:\"Null Item\"'
        ORDER BY id"
        .fetch(&mut conn);

    assert_eq!(rows.len(), 2);
    assert_eq!(rows[0], ("Null Item 1".into(), None, None));
    assert_eq!(rows[1], ("Null Item 2".into(), None, Some(2)));

    let rows: Vec<(bool,)> =
        "SELECT in_stock FROM paradedb.index_config WHERE index_config @@@ 'in_stock:false'"
            .fetch(&mut conn);

    assert_eq!(rows.len(), 13);
}

#[rstest]
fn null_key_field_build(mut conn: PgConnection) {
    "CREATE TABLE paradedb.index_config(id INTEGER, description TEXT)".execute(&mut conn);
    "INSERT INTO paradedb.index_config VALUES (NULL, 'Null Item 1'), (2, 'Null Item 2')"
        .execute(&mut conn);

    match r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, description) WITH (key_field='id')"#
        .execute_result(&mut conn)
    {
        Ok(_) => panic!("should fail with null key_field"),
        Err(err) => assert_eq!(
            err.to_string(),
            "error returned from database: key_field column 'id' cannot be NULL"
        ),
    };
}

#[rstest]
fn null_key_field_insert(mut conn: PgConnection) {
    "CREATE TABLE paradedb.index_config(id INTEGER, description TEXT)".execute(&mut conn);
    "INSERT INTO paradedb.index_config VALUES (1, 'Null Item 1'), (2, 'Null Item 2')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, description) WITH (key_field='id')"#
        .execute(&mut conn);

    match "INSERT INTO paradedb.index_config VALUES (NULL, 'Null Item 3')".execute_result(&mut conn)
    {
        Ok(_) => panic!("should fail with null key_field"),
        Err(err) => assert_eq!(
            err.to_string(),
            "error returned from database: key_field column 'id' cannot be NULL"
        ),
    };
}

#[rstest]
fn column_name_camelcase(mut conn: PgConnection) {
    "CREATE TABLE paradedb.index_config(\"IdName\" INTEGER, \"ColumnName\" TEXT)"
        .execute(&mut conn);
    "INSERT INTO paradedb.index_config VALUES (1, 'Plastic Keyboard'), (2, 'Bluetooth Headphones')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 ("IdName", "ColumnName") WITH (key_field='IdName')"#
        .execute(&mut conn);

    let rows: Vec<(i32, String)> =
        "SELECT * FROM paradedb.index_config WHERE index_config @@@ 'ColumnName:keyboard'"
            .fetch(&mut conn);

    assert_eq!(rows.len(), 1);
    assert_eq!(rows[0], (1, "Plastic Keyboard".into()));
}

#[rstest]
fn multi_index_insert_in_transaction(mut conn: PgConnection) {
    "CREATE TABLE paradedb.index_config1(id INTEGER, description TEXT)".execute(&mut conn);
    "CREATE TABLE paradedb.index_config2(id INTEGER, description TEXT)".execute(&mut conn);
    r#"CREATE INDEX index_config1_index ON paradedb.index_config1
        USING bm25 (id, description) WITH (key_field='id')"#
        .execute(&mut conn);
    r#"CREATE INDEX index_config2_index ON paradedb.index_config2
        USING bm25 (id, description) WITH (key_field='id')"#
        .execute(&mut conn);
    "BEGIN".execute(&mut conn);
    "INSERT INTO paradedb.index_config1 VALUES (1, 'Item 1'), (2, 'Item 2')".execute(&mut conn);
    "INSERT INTO paradedb.index_config2 VALUES (1, 'Item 1'), (2, 'Item 2')".execute(&mut conn);
    "COMMIT".execute(&mut conn);

    let rows: Vec<(i32, String)> =
        "SELECT * FROM paradedb.index_config1 WHERE index_config1 @@@ 'description:item'"
            .fetch(&mut conn);
    assert_eq!(rows.len(), 2);

    let rows: Vec<(i32, String)> =
        "SELECT * FROM paradedb.index_config2 WHERE index_config2 @@@ 'description:item'"
            .fetch(&mut conn);
    assert_eq!(rows.len(), 2);
}

#[rstest]
fn partitioned_schema(mut conn: PgConnection) {
    PartitionedTable::setup().execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('sales_index') ORDER BY name"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("amount".into(), "F64".into()));
    assert_eq!(rows[1], ("ctid".into(), "U64".into()));
    assert_eq!(rows[2], ("description".into(), "Str".into()));
    assert_eq!(rows[3], ("id".into(), "I64".into()));
    assert_eq!(rows[4], ("sale_date".into(), "Date".into()));
}

#[rstest]
fn partitioned_info(mut conn: PgConnection) {
    PartitionedTable::setup().execute(&mut conn);

    // Insert rows into both partitions.
    r#"
        INSERT INTO sales (sale_date, amount, description) VALUES
        ('2023-01-10', 150.00, 'Ergonomic metal keyboard'),
        ('2023-04-01', 250.00, 'Modern wall clock');
    "#
    .execute(&mut conn);

    // And validate that we see at least one segment for each.
    let segments_per_partition: Vec<(String, i64)> = "
        SELECT index_name, COUNT(*) FROM paradedb.index_info('sales_index') GROUP BY index_name
    "
    .fetch(&mut conn);
    assert_eq!(segments_per_partition.len(), 2);
    for (index_name, segment_count) in segments_per_partition {
        assert!(
            segment_count > 0,
            "Got {segment_count} for index partition {index_name}"
        );
    }

    // Just cover `index_layer_info`.
    let segments_per_partition: Vec<(String, String, i64)> =
        "SELECT relname::text, layer_size, count FROM paradedb.index_layer_info".fetch(&mut conn);
    assert!(!segments_per_partition.is_empty());
}

#[rstest]
fn partitioned_all(mut conn: PgConnection) {
    PartitionedTable::setup().execute(&mut conn);

    let schema_rows: Vec<(String, String)> =
        "SELECT id from sales WHERE id @@@ paradedb.all()".fetch(&mut conn);
    assert_eq!(schema_rows.len(), 0);

    r#"
        INSERT INTO sales (sale_date, amount, description) VALUES
        ('2023-01-10', 150.00, 'Ergonomic metal keyboard'),
        ('2023-04-01', 250.00, 'Modern wall clock');
    "#
    .execute(&mut conn);

    let schema_rows: Vec<(i32,)> =
        "SELECT id from sales WHERE id @@@ paradedb.all()".fetch(&mut conn);
    assert_eq!(schema_rows.len(), 2);
}

#[rstest]
fn partitioned_query(mut conn: PgConnection) {
    // Set up the partitioned table with two partitions and a BM25 index.
    PartitionedTable::setup().execute(&mut conn);

    // Insert some data.
    r#"
        INSERT INTO sales (sale_date, amount, description) VALUES
        ('2023-01-10', 150.00, 'Ergonomic metal keyboard'),
        ('2023-01-15', 200.00, 'Plastic keyboard'),
        ('2023-02-05', 300.00, 'Sleek running shoes'),
        ('2023-03-12', 175.50, 'Bluetooth speaker'),
        ('2023-03-25', 225.75, 'Artistic ceramic vase');

        INSERT INTO sales (sale_date, amount, description) VALUES
        ('2023-04-01', 250.00, 'Modern wall clock'),
        ('2023-04-18', 180.00, 'Designer wall paintings'),
        ('2023-05-09', 320.00, 'Handcrafted wooden frame');
    "#
    .execute(&mut conn);

    // Test: Verify data is partitioned correctly by querying each partition
    let rows_q1: Vec<(i32, String, String)> = r#"
        SELECT id, description, sale_date::text FROM sales_2023_q1
    "#
    .fetch(&mut conn);
    assert_eq!(rows_q1.len(), 5, "Expected 5 rows in Q1 partition");

    let rows_q2: Vec<(i32, String, String)> = r#"
        SELECT id, description, sale_date::text FROM sales_2023_q2
    "#
    .fetch(&mut conn);
    assert_eq!(rows_q2.len(), 3, "Expected 3 rows in Q2 partition");

    // Test: Search using the bm25 index against both the parent and child tables.
    for table in ["sales", "sales_2023_q1"] {
        let search_results: Vec<(i32, String)> = format!(
            r#"
            SELECT id, description FROM {table} WHERE id @@@ 'description:keyboard'
            "#
        )
        .fetch(&mut conn);
        assert_eq!(search_results.len(), 2, "Expected 2 items with 'keyboard'");
    }

    // Test: Retrieve items by a numeric range (amount field) and verify bm25 compatibility
    for (table, expected) in [("sales", 5), ("sales_2023_q1", 3)] {
        let amount_results: Vec<(i32, String, f32)> = format!(
            r#"
            SELECT id, description, amount FROM {table}
            WHERE amount @@@ '[175 TO 250]'
            ORDER BY amount ASC
            "#
        )
        .fetch(&mut conn);
        assert_eq!(
            amount_results.len(),
            expected,
            "Expected {expected} items with amount in range 175-250"
        );
    }
}

#[rstest]
fn partitioned_uses_custom_scan(mut conn: PgConnection) {
    PartitionedTable::setup().execute(&mut conn);

    r#"
        INSERT INTO sales (sale_date, amount, description) VALUES
        ('2023-01-10', 150.00, 'Ergonomic metal keyboard'),
        ('2023-04-01', 250.00, 'Modern wall clock');
    "#
    .execute(&mut conn);

    "SET max_parallel_workers TO 0;".execute(&mut conn);

    // Without the partition key.
    let (plan,) = r#"
        EXPLAIN (ANALYZE, VERBOSE, FORMAT JSON)
        SELECT count(*)
        FROM sales
        WHERE id @@@ '1';
        "#
    .fetch_one::<(Value,)>(&mut conn);
    eprintln!("{plan:#?}");

    let per_partition_plans = plan
        .pointer("/0/Plan/Plans/0/Plans")
        .unwrap()
        .as_array()
        .unwrap();
    assert_eq!(
        per_partition_plans.len(),
        2,
        "Expected 2 partitions to be scanned."
    );
    for per_partition_plan in per_partition_plans {
        pretty_assertions::assert_eq!(
            per_partition_plan.get("Node Type"),
            Some(&Value::String(String::from("Custom Scan")))
        );
    }

    // With the partition key: we expect the partition to be filtered, and for
    // us to apply pushdown.
    let (plan,) = r#"
        EXPLAIN (ANALYZE, VERBOSE, FORMAT JSON)
        SELECT count(*)
        FROM sales
        WHERE description @@@ 'keyboard' and sale_date = '2023-01-10';
        "#
    .fetch_one::<(Value,)>(&mut conn);
    eprintln!("{plan:#?}");

    let per_partition_plans = plan.pointer("/0/Plan/Plans").unwrap().as_array().unwrap();
    assert_eq!(
        per_partition_plans.len(),
        1,
        "Expected 1 partition to be scanned."
    );
    for per_partition_plan in per_partition_plans {
        pretty_assertions::assert_eq!(
            per_partition_plan.get("Node Type"),
            Some(&Value::String(String::from("Custom Scan")))
        );
        let query = per_partition_plan.get("Tantivy Query").unwrap().to_string();
        assert!(
            query.to_string().contains("2023-01-10"),
            "Expected sale_date to be pushed down into query: {query:?}",
        );
    }
}

#[rstest]
fn custom_enum_term(mut conn: PgConnection) {
    r#"
    CREATE TYPE color AS ENUM ('red', 'green', 'blue');
    CREATE TABLE paradedb.index_config(id INTEGER, description TEXT, color color);
    INSERT INTO paradedb.index_config VALUES (1, 'Item 1', 'red'), (2, 'Item 2', 'green');
    "#
    .execute(&mut conn);

    r#"
    CREATE INDEX index_config_index ON paradedb.index_config
    USING bm25 (id, description, color)
    WITH (key_field='id');
    "#
    .execute(&mut conn);

    let rows: Vec<(i32, String)> =
        "SELECT id, description FROM paradedb.index_config WHERE id @@@ paradedb.term('color', 'red'::color)".fetch(&mut conn);

    assert_eq!(rows, vec![(1, "Item 1".into())]);
}

#[rstest]
fn custom_enum_parse(mut conn: PgConnection) {
    r#"
    CREATE TYPE color AS ENUM ('red', 'green', 'blue');
    CREATE TABLE paradedb.index_config(id INTEGER, description TEXT, color color);
    INSERT INTO paradedb.index_config VALUES (1, 'Item 1', 'red'), (2, 'Item 2', 'green');
    "#
    .execute(&mut conn);

    r#"
    CREATE INDEX index_config_index ON paradedb.index_config
    USING bm25 (id, description, color)
    WITH (key_field='id');
    "#
    .execute(&mut conn);

    let rows: Vec<(i32, String)> =
        "SELECT id, description FROM paradedb.index_config WHERE id @@@ paradedb.parse('color:1.0')".fetch(&mut conn);

    assert_eq!(rows, vec![(1, "Item 1".into())]);
}

#[rstest]
fn long_text_key_field_issue2198(mut conn: PgConnection) {
    "CREATE TABLE issue2198 (id TEXT, value TEXT)".execute(&mut conn);

    "CREATE INDEX idxissue2198 ON issue2198 USING bm25 (id, value) WITH (key_field='id')"
        .execute(&mut conn);

    let long_string = "a".repeat(10000);

    format!("INSERT INTO issue2198(id) VALUES ('{long_string}')").execute(&mut conn);
    let (count,) = format!("SELECT count(*) FROM issue2198 WHERE id @@@ '{long_string}'")
        .fetch_one::<(i64,)>(&mut conn);
    assert_eq!(count, 1);

    let (count,) =
        format!("SELECT count(*) FROM issue2198 WHERE id @@@ paradedb.term('id', '{long_string}')")
            .fetch_one::<(i64,)>(&mut conn);
    assert_eq!(count, 1);
}

#[rstest]
fn uuid_as_raw_issue2199(mut conn: PgConnection) {
    "CREATE TABLE issue2199 (id SERIAL8 NOT NULL PRIMARY KEY, value uuid);".execute(&mut conn);

    "CREATE INDEX idxissue2199 ON issue2199 USING bm25 (id, value) WITH (key_field='id');"
        .execute(&mut conn);

    let uuid = uuid::Uuid::new_v4();

    format!("INSERT INTO issue2199(value) VALUES ('{uuid}')").execute(&mut conn);
    let (count,) = format!("SELECT count(*) FROM issue2199 WHERE value @@@ '{uuid}'")
        .fetch_one::<(i64,)>(&mut conn);
    assert_eq!(count, 1);

    let (count,) =
        format!("SELECT count(*) FROM issue2199 WHERE id @@@ paradedb.term('value', '{uuid}')")
            .fetch_one::<(i64,)>(&mut conn);
    assert_eq!(count, 1);
}

/// Common setup function for partitioned and non-partitioned table tests
fn setup_table_for_order_by_limit_test(conn: &mut PgConnection, is_partitioned: bool) {
    // Common settings for all tests
    r#"
    SET enable_indexscan TO off;
    SET enable_bitmapscan TO off;
    SET max_parallel_workers TO 0;
    "#
    .execute(conn);

    if is_partitioned {
        // Set up a partitioned table
        r#"
        DROP TABLE IF EXISTS sales;

        CREATE TABLE sales (
            id SERIAL,
            product_name TEXT,
            amount DECIMAL,
            sale_date DATE
        ) PARTITION BY RANGE (sale_date);

        CREATE TABLE sales_2023 PARTITION OF sales
        FOR VALUES FROM ('2023-01-01') TO ('2024-01-01');

        CREATE TABLE sales_2024 PARTITION OF sales
        FOR VALUES FROM ('2024-01-01') TO ('2025-01-01');

        INSERT INTO sales (product_name, amount, sale_date) VALUES
        ('Laptop', 1200.00, '2023-01-15'),
        ('Smartphone', 800.00, '2023-03-10'),
        ('Headphones', 150.00, '2023-05-20'),
        ('Monitor', 300.00, '2023-07-05'),
        ('Keyboard', 80.00, '2023-09-12'),
        ('Mouse', 40.00, '2023-11-25'),
        ('Tablet', 500.00, '2024-01-05'),
        ('Printer', 200.00, '2024-02-18'),
        ('Camera', 600.00, '2024-04-22'),
        ('Speaker', 120.00, '2024-06-30');

        CREATE INDEX idx_sales_bm25 ON sales
        USING bm25 (id, product_name, amount, sale_date)
        WITH (
            key_field = 'id',
            text_fields = '{"product_name": {}}',
            numeric_fields = '{"amount": {}}',
            datetime_fields = '{"sale_date": {"fast": true}}'
        );
        "#
        .execute(conn);
    } else {
        // Set up two separate tables (not partitioned)
        r#"
        DROP TABLE IF EXISTS products_2023;
        DROP TABLE IF EXISTS products_2024;

        -- Create two separate tables with similar schema
        CREATE TABLE products_2023 (
            id SERIAL,
            product_name TEXT,
            amount DECIMAL,
            sale_date DATE
        );

        CREATE TABLE products_2024 (
            id SERIAL,
            product_name TEXT,
            amount DECIMAL,
            sale_date DATE
        );

        -- Insert similar data to both tables
        INSERT INTO products_2023 (product_name, amount, sale_date) VALUES
        ('Laptop', 1200.00, '2023-01-15'),
        ('Smartphone', 800.00, '2023-03-10'),
        ('Headphones', 150.00, '2023-05-20'),
        ('Monitor', 300.00, '2023-07-05'),
        ('Keyboard', 80.00, '2023-09-12');

        INSERT INTO products_2024 (product_name, amount, sale_date) VALUES
        ('Mouse', 40.00, '2024-01-25'),
        ('Tablet', 500.00, '2024-01-05'),
        ('Printer', 200.00, '2024-02-18'),
        ('Camera', 600.00, '2024-04-22'),
        ('Speaker', 120.00, '2024-06-30');

        -- Create BM25 indexes for both tables
        CREATE INDEX idx_products_2023_bm25 ON products_2023
        USING bm25 (id, product_name, amount, sale_date)
        WITH (
            key_field = 'id',
            text_fields = '{"product_name": {}}',
            numeric_fields = '{"amount": {}}',
            datetime_fields = '{"sale_date": {"fast": true}}'
        );

        CREATE INDEX idx_products_2024_bm25 ON products_2024
        USING bm25 (id, product_name, amount, sale_date)
        WITH (
            key_field = 'id',
            text_fields = '{"product_name": {}}',
            numeric_fields = '{"amount": {}}',
            datetime_fields = '{"sale_date": {"fast": true}}'
        );
        "#
        .execute(conn);
    }
}

/// Setup function for view tests
fn setup_view_for_order_by_limit_test(conn: &mut PgConnection) {
    // First drop any existing tables or views
    r#"
    DROP VIEW IF EXISTS products_view;
    DROP TABLE IF EXISTS products_2023_view;
    DROP TABLE IF EXISTS products_2024_view;

    SET enable_indexscan TO off;
    SET enable_bitmapscan TO off;
    SET max_parallel_workers TO 0;

    -- Create two separate tables with similar schema
    CREATE TABLE products_2023_view (
        id SERIAL,
        product_name TEXT,
        amount DECIMAL,
        sale_date DATE
    );

    CREATE TABLE products_2024_view (
        id SERIAL,
        product_name TEXT,
        amount DECIMAL,
        sale_date DATE
    );

    -- Insert data to both tables
    INSERT INTO products_2023_view (product_name, amount, sale_date) VALUES
    ('Laptop', 1200.00, '2023-01-15'),
    ('Smartphone', 800.00, '2023-03-10'),
    ('Headphones', 150.00, '2023-05-20'),
    ('Monitor', 300.00, '2023-07-05'),
    ('Keyboard', 80.00, '2023-09-12');

    INSERT INTO products_2024_view (product_name, amount, sale_date) VALUES
    ('Mouse', 40.00, '2024-01-25'),
    ('Tablet', 500.00, '2024-01-05'),
    ('Printer', 200.00, '2024-02-18'),
    ('Camera', 600.00, '2024-04-22'),
    ('Speaker', 120.00, '2024-06-30');

    -- Create BM25 indexes for both tables
    CREATE INDEX idx_products_2023_view_bm25 ON products_2023_view
    USING bm25 (id, product_name, amount, sale_date)
    WITH (
        key_field = 'id',
        text_fields = '{"product_name": {}}',
        numeric_fields = '{"amount": {}}',
        datetime_fields = '{"sale_date": {"fast": true}}'
    );

    CREATE INDEX idx_products_2024_view_bm25 ON products_2024_view
    USING bm25 (id, product_name, amount, sale_date)
    WITH (
        key_field = 'id',
        text_fields = '{"product_name": {}}',
        numeric_fields = '{"amount": {}}',
        datetime_fields = '{"sale_date": {"fast": true}}'
    );

    -- Create view combining both tables
    CREATE VIEW products_view AS
    SELECT * FROM products_2023_view
    UNION ALL
    SELECT * FROM products_2024_view;
    "#
    .execute(conn);
}

#[rstest]
fn partitioned_order_by_limit_pushdown(mut conn: PgConnection) {
    setup_table_for_order_by_limit_test(&mut conn, true);

    // Get the explain plan
    let explain_output = r#"
    EXPLAIN (ANALYZE, VERBOSE)
    SELECT * FROM sales
    WHERE product_name @@@ 'laptop OR smartphone OR headphones'
    ORDER BY sale_date LIMIT 5;
    "#
    .fetch::<(String,)>(&mut conn)
    .into_iter()
    .map(|(line,)| line)
    .collect::<Vec<String>>()
    .join("\n");

    // Check for TopNScanExecState in the plan
    assert!(
        explain_output.contains("TopNScanExecState"),
        "Expected TopNScanExecState in the execution plan"
    );

    // Verify sort field and direction
    assert!(
        explain_output.contains("TopN Order By: sale_date asc"),
        "Expected sort field to be sale_date"
    );

    // Verify the limit is pushed down
    assert!(
        explain_output.contains("TopN Limit: 5"),
        "Expected limit 5 to be pushed down"
    );

    // Also test that we get the correct sorted results
    let results: Vec<(String, String)> = r#"
    SELECT product_name, sale_date::text FROM sales
    WHERE product_name @@@ 'laptop OR smartphone OR headphones'
    ORDER BY sale_date LIMIT 5;
    "#
    .fetch(&mut conn);

    // Verify we got the right number of results
    assert_eq!(results.len(), 3, "Expected 3 matching results");

    // Verify they're in the correct order (ordered by sale_date)
    assert_eq!(results[0].0, "Laptop");
    assert_eq!(results[1].0, "Smartphone");
    assert_eq!(results[2].0, "Headphones");

    // Check the dates are in ascending order
    assert_eq!(results[0].1, "2023-01-15");
    assert_eq!(results[1].1, "2023-03-10");
    assert_eq!(results[2].1, "2023-05-20");
}

#[rstest]
fn non_partitioned_no_order_by_limit_pushdown(mut conn: PgConnection) {
    setup_table_for_order_by_limit_test(&mut conn, false);

    // Get the explain plan for a UNION query with ORDER BY LIMIT
    let explain_output = r#"
    EXPLAIN (ANALYZE, VERBOSE)
    SELECT * FROM (
        SELECT * FROM products_2023
        WHERE product_name @@@ 'laptop OR smartphone OR headphones'
        UNION ALL
        SELECT * FROM products_2024
        WHERE product_name @@@ 'tablet OR printer'
    ) combined_products
    ORDER BY sale_date LIMIT 5;
    "#
    .fetch::<(String,)>(&mut conn)
    .into_iter()
    .map(|(line,)| line)
    .collect::<Vec<String>>()
    .join("\n");

    // Verify NormalScanExecState is used. We can't use TopN because there the limit occurs _after_
    // the union. And we can't use fast fields, because there are non-fast fields.
    assert!(
        explain_output.contains("NormalScanExecState"),
        "Expected NormalScanExecState in the execution plan"
    );

    assert!(
        !explain_output.contains("TopNScanExecState"),
        "TopNScanExecState should not be present in the execution plan"
    );

    // Even without the optimization, verify the query returns correct results
    let results: Vec<(String, String)> = r#"
    SELECT product_name, sale_date::text FROM (
        SELECT * FROM products_2023
        WHERE product_name @@@ 'laptop OR smartphone OR headphones'
        UNION ALL
        SELECT * FROM products_2024
        WHERE product_name @@@ 'tablet OR printer'
    ) combined_products
    ORDER BY sale_date LIMIT 5;
    "#
    .fetch(&mut conn);

    // Verify we got the right number of results and correct order
    assert!(results.len() <= 5, "Expected at most 5 matching results");

    // Check that the first result is the earliest date
    if !results.is_empty() {
        let mut prev_date = &results[0].1;
        for result in &results[1..] {
            assert!(
                &result.1 >= prev_date,
                "Results should be sorted by date in ascending order"
            );
            prev_date = &result.1;
        }
    }
}

#[rstest]
fn view_no_order_by_limit_pushdown(mut conn: PgConnection) {
    setup_view_for_order_by_limit_test(&mut conn);

    // Verify the tables and indexes were created properly
    let table_check: Vec<(String,)> = r#"
    SELECT tablename FROM pg_tables
    WHERE tablename IN ('products_2023_view', 'products_2024_view')
    ORDER BY tablename;
    "#
    .fetch(&mut conn);
    assert_eq!(table_check.len(), 2, "Both tables should exist");

    let index_check: Vec<(String,)> = r#"
    SELECT indexname FROM pg_indexes
    WHERE indexname IN ('idx_products_2023_view_bm25', 'idx_products_2024_view_bm25')
    ORDER BY indexname;
    "#
    .fetch(&mut conn);
    assert_eq!(index_check.len(), 2, "Both indexes should exist");

    // Verify the view was created
    let view_check: Vec<(String,)> = r#"
    SELECT viewname FROM pg_views WHERE viewname = 'products_view';
    "#
    .fetch(&mut conn);
    assert_eq!(view_check.len(), 1, "View should exist");

    // Verify direct table queries work
    let test_query: Vec<(String,)> = r#"
    SELECT product_name FROM products_2023_view
    WHERE product_name @@@ 'laptop'
    LIMIT 1;
    "#
    .fetch(&mut conn);
    assert_eq!(test_query.len(), 1, "Direct table query should work");

    // Get the explain plan for a view query with ORDER BY LIMIT
    let explain_output = r#"
    EXPLAIN (ANALYZE, VERBOSE)
    SELECT * FROM products_view
    WHERE product_name @@@ 'laptop OR smartphone OR headphones OR tablet OR printer'
    ORDER BY sale_date LIMIT 5;
    "#
    .fetch::<(String,)>(&mut conn)
    .into_iter()
    .map(|(line,)| line)
    .collect::<Vec<String>>()
    .join("\n");

    // Print the explain plan for debugging
    println!("EXPLAIN output:\n{explain_output}");

    // Verify NormalScanExecState is used (not TopNScanExecState)
    assert!(
        explain_output.contains("NormalScanExecState"),
        "Expected NormalScanExecState in the execution plan"
    );

    assert!(
        !explain_output.contains("TopNScanExecState"),
        "TopNScanExecState should not be present in the execution plan"
    );

    // Ensure the query works and returns correct results
    let results: Vec<(String, String)> = r#"
    SELECT product_name, sale_date::text FROM products_view
    WHERE product_name @@@ 'laptop OR smartphone OR headphones OR tablet OR printer'
    ORDER BY sale_date LIMIT 5;
    "#
    .fetch(&mut conn);

    println!("Query results: {results:?}");

    // Verify we got the right number of results and correct order
    assert_eq!(results.len(), 5, "Expected 5 matching results");

    // Check that results are sorted by date
    if !results.is_empty() {
        let mut prev_date = &results[0].1;
        for result in &results[1..] {
            assert!(
                &result.1 >= prev_date,
                "Results should be sorted by date in ascending order"
            );
            prev_date = &result.1;
        }
    }
}

#[rstest]
fn expression_with_options(mut conn: PgConnection) {
    "CALL paradedb.create_bm25_test_table(table_name => 'index_config', schema_name => 'paradedb')"
        .execute(&mut conn);

    r#"CREATE INDEX index_config_index ON paradedb.index_config
        USING bm25 (id, (lower(description)::pdb.simple)) WITH (key_field='id')"#
        .execute(&mut conn);

    let rows: Vec<(String, String)> =
        "SELECT name, field_type FROM paradedb.schema('paradedb.index_config_index') ORDER BY name"
            .fetch(&mut conn);

    assert_eq!(rows[0], ("ctid".into(), "U64".into()));
    assert_eq!(rows[1], ("description".into(), "Str".into()));
    assert_eq!(rows[2], ("id".into(), "I64".into()));
}
