// 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/>.

//! Tests for the paradedb.tokenize function

use pretty_assertions::assert_eq;
use rstest::*;
use sqlx::PgConnection;
use tests::fixtures::*;

#[rstest]
fn default_tokenizer(mut conn: PgConnection) {
    let rows: Vec<(String, i32)> = r#"
    SELECT * FROM paradedb.tokenize(paradedb.tokenizer('default'), 'hello world');
    "#
    .fetch_collect(&mut conn);

    assert_eq!(rows, vec![("hello".into(), 0), ("world".into(), 1)]);

    let res = r#"
    SELECT * FROM paradedb.tokenize(paradedb.tokenizer('de'), 'hello world');
    "#
    .execute_result(&mut conn);

    assert!(res.is_err());
}

#[rstest]
fn tokenizer_filters(mut conn: PgConnection) {
    // Test default tokenizer with default layers (lowercase => true, remove_long => 255).
    let rows: Vec<(String, i32)> = r#"
    SELECT * FROM paradedb.tokenize(
      paradedb.tokenizer('default'),
      'Hello, hello, ladiesandgentlemen!'
    );
    "#
    .fetch_collect(&mut conn);

    assert_eq!(
        rows,
        vec![
            ("hello".into(), 0),
            ("hello".into(), 1),
            ("ladiesandgentlemen".into(), 2)
        ]
    );

    // Test default optimizer with explicit layers.
    let rows: Vec<(String, i32)> = r#"
    SELECT * FROM paradedb.tokenize(
      paradedb.tokenizer('default', lowercase => false, remove_long => 15),
      'Hello, hello, ladiesandgentlemen!'
    );
    "#
    .fetch_collect(&mut conn);

    assert_eq!(
        rows,
        vec![
            ("Hello".into(), 0),
            ("hello".into(), 1),
            // ladiesandgentlemen is filtered out because it is too long
        ]
    );
}

#[rstest]
fn list_tokenizers(mut conn: PgConnection) {
    let rows: Vec<(String,)> = r#"
    SELECT * FROM paradedb.tokenizers();
    "#
    .fetch_collect(&mut conn);

    assert_eq!(
        rows,
        vec![
            ("default".into(),),
            ("keyword".into(),),
            ("keyword_deprecated".into(),),
            ("raw".into(),),
            ("literal_normalized".into(),),
            ("white_space".into(),),
            ("regex_tokenizer".into(),),
            ("chinese_compatible".into(),),
            ("source_code".into(),),
            ("ngram".into(),),
            ("edge_ngram".into(),),
            ("chinese_lindera_deprecated".into(),),
            ("chinese_lindera".into(),),
            ("japanese_lindera_deprecated".into(),),
            ("japanese_lindera".into(),),
            ("korean_lindera_deprecated".into(),),
            ("korean_lindera".into(),),
            ("icu".into(),),
            ("jieba".into(),),
            ("lindera_deprecated".into(),),
            ("lindera".into(),),
            ("unicode_words_deprecated".into(),),
            ("unicode_words".into(),)
        ]
    );
}

#[rstest]
fn test_index_fields(mut conn: PgConnection) {
    // First create a test table and index
    r#"
        CREATE TABLE test_fields (
            id INTEGER PRIMARY KEY,
            title TEXT,
            price NUMERIC,
            in_stock BOOLEAN,
            metadata JSONB,
            price_range INT8RANGE,
            created_at TIMESTAMP
        );
    "#
    .execute(&mut conn);

    r#"
        CREATE INDEX idx_test_fields ON test_fields USING bm25 (
            id, title, price, in_stock, metadata, price_range, created_at
        ) WITH (
            key_field='id',
            text_fields='{"title": {"fast": true}}',
            numeric_fields='{"price": {}}',
            boolean_fields='{"in_stock": {}}',
            json_fields='{"metadata": {}}',
            range_fields='{"price_range": {}}'
        );
    "#
    .execute(&mut conn);

    // Get the index fields
    let row: (serde_json::Value,) = r#"
        SELECT paradedb.index_fields('idx_test_fields')::jsonb;
    "#
    .fetch_one(&mut conn);

    // Verify all fields are present with correct configurations
    let fields = row.0.as_object().unwrap();

    // Check key field (id)
    assert!(fields.contains_key("id"));
    let id_config = fields.get("id").unwrap().get("Numeric").unwrap();
    assert_eq!(id_config.get("indexed").unwrap(), true);
    assert_eq!(id_config.get("fast").unwrap(), true);

    // Check text field (title)
    assert!(fields.contains_key("title"));
    let title_config = fields
        .get("title")
        .unwrap()
        .as_object()
        .unwrap()
        .get("Text")
        .unwrap()
        .as_object()
        .unwrap();
    assert_eq!(
        title_config.get("indexed").unwrap().as_bool().unwrap(),
        true
    );

    // Check numeric field (price)
    assert!(fields.contains_key("price"));
    let price_config = fields
        .get("price")
        .unwrap()
        .as_object()
        .unwrap()
        .get("Numeric")
        .unwrap()
        .as_object()
        .unwrap();
    assert_eq!(
        price_config.get("indexed").unwrap().as_bool().unwrap(),
        true
    );
    assert_eq!(price_config.get("fast").unwrap().as_bool().unwrap(), true);

    // Check boolean field (in_stock)
    assert!(fields.contains_key("in_stock"));
    let stock_config = fields
        .get("in_stock")
        .unwrap()
        .as_object()
        .unwrap()
        .get("Boolean")
        .unwrap()
        .as_object()
        .unwrap();
    assert_eq!(
        stock_config.get("indexed").unwrap().as_bool().unwrap(),
        true
    );

    // Check JSON field (metadata)
    assert!(fields.contains_key("metadata"));
    let metadata_config = fields
        .get("metadata")
        .unwrap()
        .as_object()
        .unwrap()
        .get("Json")
        .unwrap()
        .as_object()
        .unwrap();
    assert_eq!(
        metadata_config.get("indexed").unwrap().as_bool().unwrap(),
        true
    );

    assert!(fields.contains_key("price_range"));

    // Cleanup
    r#"DROP TABLE test_fields CASCADE;"#.execute(&mut conn);
}
