"""
pip install asyncpg
"""
import asyncpg

from Config.Config import *

# PostgreSQL 配置
POSTGRES_CONFIG = {
    "host": POSTGRES_HOST,
    "port": POSTGRES_PORT,
    "user": POSTGRES_USER,
    "password": POSTGRES_PASSWORD,
    "database": POSTGRES_DATABASE,
    "min_size": 1,  # 设置为0表示不保留空闲连接
    "max_size": 20,
    "command_timeout": 60
}

# 初始化 PostgreSQL 连接池
async def init_postgres_pool():
    return await asyncpg.create_pool(**POSTGRES_CONFIG)


# 查询示例
async def query_example(pool):
    async with pool.acquire() as conn:
        # 执行查询
        rows = await conn.fetch('SELECT * FROM your_table LIMIT 10')
        # 处理结果
        for row in rows:
            print(dict(row))
        return rows


# 插入示例
async def insert_example(pool, data):
    async with pool.acquire() as conn:
        # 执行插入
        stmt = """
        INSERT INTO your_table (column1, column2) 
        VALUES ($1, $2)
        """
        # 使用参数化查询防止SQL注入
        inserted_id = await conn.fetchval(stmt, data['value1'], data['value2'])
        print(f"插入成功！")
        return inserted_id


# 使用示例
async def main():
    pool = await init_postgres_pool()

    # 查询示例
    await query_example(pool)

    # 插入示例
    #data_to_insert = {'value1': 'test1', 'value2': 'test2'}
    #await insert_example(pool, data_to_insert)

    await pool.close()


if __name__ == '__main__':
    import asyncio

    asyncio.run(main())