#!/usr/bin/env python
"""
用户数据迁移脚本
将用户数据从JSON文件迁移到PostgreSQL数据库
"""

import os
import sys
import json
import logging
import time
import psycopg2

# 添加项目根目录到Python路径
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))

from app.core.system.auth import init_db, get_pg_connection, release_pg_connection

# 配置日志
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

# 旧的用户数据文件路径
OLD_USER_DATA_PATH = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'data', 'users.json')

def migrate_users():
    """
    将用户数据从JSON文件迁移到PostgreSQL数据库
    """
    logger.info("开始迁移用户数据...")
    
    # 确保用户表已创建
    init_db()
    
    # 检查旧的用户数据文件是否存在
    if not os.path.exists(OLD_USER_DATA_PATH):
        logger.warning(f"用户数据文件不存在: {OLD_USER_DATA_PATH}，无需迁移")
        return
    
    conn = None
    try:
        # 读取旧的用户数据
        with open(OLD_USER_DATA_PATH, 'r', encoding='utf-8') as f:
            users = json.load(f)
        
        logger.info(f"从文件中读取了 {len(users)} 个用户")
        
        # 连接数据库
        conn = get_pg_connection()
        cursor = conn.cursor()
        
        migrated_count = 0
        skipped_count = 0
            
        for username, user_data in users.items():
            # 检查用户是否已存在
            check_query = "SELECT username FROM users WHERE username = %s"
            cursor.execute(check_query, (username,))
            
            if cursor.fetchone():
                logger.info(f"用户 {username} 已存在，跳过")
                skipped_count += 1
                continue
            
            # 创建用户
            insert_query = """
            INSERT INTO users (id, username, password, created_at, last_login, is_admin)
            VALUES (%s, %s, %s, %s, %s, %s)
            """
            
            cursor.execute(
                insert_query,
                (
                    user_data.get('id', f"migrated-{time.time()}"),
                    username,
                    user_data.get('password', ''),
                    user_data.get('created_at', time.time()),
                    user_data.get('last_login'),
                    user_data.get('is_admin', False)
                )
            )
            
            migrated_count += 1
            logger.info(f"已迁移用户: {username}")
        
        conn.commit()
        cursor.close()
        
        logger.info(f"迁移完成: 成功迁移 {migrated_count} 个用户，跳过 {skipped_count} 个用户")
        
        # 备份旧文件
        backup_path = f"{OLD_USER_DATA_PATH}.bak.{int(time.time())}"
        os.rename(OLD_USER_DATA_PATH, backup_path)
        logger.info(f"已备份旧用户数据文件到: {backup_path}")
        
    except Exception as e:
        logger.error(f"迁移用户数据失败: {str(e)}")
        if conn:
            conn.rollback()
        raise
    finally:
        if conn:
            release_pg_connection(conn)

if __name__ == "__main__":
    try:
        migrate_users()
    except Exception as e:
        logger.error(f"迁移失败: {str(e)}")
        sys.exit(1)
    
    sys.exit(0)