"""
测试 seed_is_exist 功能（真实数据库）

测试说明：
- 调用真实的 seed_is_exist 函数和真实 MySQL 数据库（192.168.123.199）
- 首次运行自动创建 LookingWeb 库和 seeds_info 表（幂等，可重复运行）
- 测试插入的数据在测后自动清理，不污染数据库
"""
import sys
import os
import uuid

import pymysql
import pytest
from loguru import logger

# 添加项目路径
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))

from dataService.MySqlService import DatabaseConfig, MySQLDatabase, seed_is_exist, save_seed
from dataService.dto.SeedInfo import SeedInfo

CREATE_DATABASE_SQL = (
    "CREATE DATABASE IF NOT EXISTS `LookingWeb` "
    "DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci"
)

CREATE_TABLE_SQL = """
CREATE TABLE IF NOT EXISTS `seeds_info` (
    id INT UNSIGNED NOT NULL AUTO_INCREMENT,
    name VARCHAR(255) DEFAULT NULL,
    seed_url VARCHAR(512) NOT NULL,
    have_download VARCHAR(16) DEFAULT NULL,
    create_time DATETIME DEFAULT NULL,
    update_time DATETIME DEFAULT NULL,
    url VARCHAR(512) DEFAULT NULL,
    PRIMARY KEY (id),
    KEY idx_seed_url (seed_url)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
"""

# 本模块测试插入过的种子 URL，测后统一清理
_inserted_urls = []


def ensure_schema():
    """幂等创建 LookingWeb 库和 seeds_info 表（真实数据库）"""
    # 第一步：不带库名连接，先创建数据库
    conn = pymysql.connect(
        host=DatabaseConfig.HOST, port=DatabaseConfig.PORT,
        user=DatabaseConfig.USER, password=DatabaseConfig.PASSWORD,
        charset='utf8mb4', cursorclass=pymysql.cursors.DictCursor)
    try:
        with conn.cursor() as cur:
            cur.execute(CREATE_DATABASE_SQL)
        conn.commit()
        logger.info("数据库就绪: {}（已确认存在）", DatabaseConfig.DB)
    finally:
        conn.close()

    # 第二步：连接 LookingWeb 库，创建 seeds_info 表
    conn = pymysql.connect(
        host=DatabaseConfig.HOST, port=DatabaseConfig.PORT,
        user=DatabaseConfig.USER, password=DatabaseConfig.PASSWORD,
        db=DatabaseConfig.DB, charset='utf8mb4',
        cursorclass=pymysql.cursors.DictCursor)
    try:
        with conn.cursor() as cur:
            cur.execute(CREATE_TABLE_SQL)
        conn.commit()
        logger.info("数据表就绪: seeds_info")
    finally:
        conn.close()


def make_test_seed():
    """创建带唯一 seed_url 的真实 SeedInfo 对象，并登记以便测后清理"""
    url = f"magnet:?xt=urn:btih:{uuid.uuid4().hex}"
    _inserted_urls.append(url)
    return SeedInfo(name="测试种子", seedUrl=url, haveDownload="1", url=url)


@pytest.fixture(scope="module", autouse=True)
def db_schema():
    """模块级：确保真实数据库和表存在"""
    ensure_schema()
    yield


@pytest.fixture(autouse=True)
def cleanup_inserted_seeds():
    """每个测试后：清理本模块插入的种子行，保证测试可重复运行"""
    yield
    if not _inserted_urls:
        return
    with MySQLDatabase.create_connection() as db:
        for seed_url in _inserted_urls:
            db.execute("DELETE FROM seeds_info WHERE seed_url = %s", (seed_url,))
    _inserted_urls.clear()


class TestSeedIsExist:
    """使用真实数据库测试 seed_is_exist"""

    def setup_method(self):
        logger.remove()
        logger.add(sys.stderr, level="DEBUG")

    def test_seed_not_exists_returns_false(self):
        """数据库中不存在的种子 URL 应返回 False"""
        seed = make_test_seed()
        logger.info("测试种子不存在场景: {}", seed.seedUrl)

        result = seed_is_exist(seed)

        assert result is False

    def test_seed_exists_returns_true(self):
        """先通过真实的 save_seed 插入种子，seed_is_exist 应返回 True"""
        seed = make_test_seed()
        assert save_seed(seed) is True, "前置条件：save_seed 应成功插入种子"
        logger.info("测试种子已插入: {}", seed.seedUrl)

        result = seed_is_exist(seed)

        assert result is True

    def test_multiple_seeds_all_exist(self):
        """多个已存在种子都应被识别为存在"""
        seeds = [make_test_seed() for _ in range(3)]
        for seed in seeds:
            assert save_seed(seed) is True

        for seed in seeds:
            assert seed_is_exist(seed) is True, f"种子应已存在: {seed.seedUrl}"

    def test_seed_exists_after_delete_returns_false(self):
        """删除后的种子再查询应返回 False（完整的真实生命周期）"""
        from dataService.MySqlService import delete_seed
        seed = make_test_seed()
        assert save_seed(seed) is True
        assert seed_is_exist(seed) is True

        assert delete_seed(seed) is True, "前置条件：delete_seed 应成功删除种子"

        assert seed_is_exist(seed) is False

    def test_db_unreachable_returns_false(self, monkeypatch):
        """数据库不可达时（真实错误路径）应返回 False，而不是抛异常"""
        # 指向同主机一个已关闭的端口，模拟数据库不可达
        monkeypatch.setattr(DatabaseConfig, "PORT", 3307)
        seed = make_test_seed()

        result = seed_is_exist(seed)

        assert result is False


def run_tests():
    """运行所有测试"""
    pytest.main([
        __file__,
        "-v",
        "--tb=short",
        "--log-cli-level=INFO"
    ])


if __name__ == "__main__":
    run_tests()