from flask import Flask, render_template, jsonify, Response, stream_with_context
from config import Config
from extensions import db, redis_client, migrate, s3_client
from blueprints.auth import auth_bp
from blueprints.api import api_bp
from blueprints.admin import admin_bp
from blueprints.payment import payment_bp
from apscheduler.schedulers.background import BackgroundScheduler
from apscheduler.triggers.interval import IntervalTrigger
import threading
import time
import logging

# 导入模律（必需在 db.create_all() 之前导入）
import models

# 定时任务函数
def sync_pending_orders():
    """定时任务: 检查并同步30分钟内的待支付订单"""
    from models import Order, User, get_bj_now
    from services.alipay_service import AlipayService
    from services.logger import system_logger
    from datetime import timedelta
    
    try:
        # 查询最还30分钟内的待支付订单
        thirty_min_ago = get_bj_now() - timedelta(minutes=30)
        pending_orders = Order.query.filter(
            Order.status == 'PENDING',
            Order.created_at >= thirty_min_ago
        ).all()
        
        if not pending_orders:
            return
        
        alipay_service = AlipayService()
        updated_count = 0
        
        for order in pending_orders:
            try:
                # 查询订单状态
                alipay_result = alipay_service.query_order_status(order.out_trade_no)
                
                if alipay_result and alipay_result.get('trade_status') in ['TRADE_SUCCESS', 'TRADE_FINISHED']:
                    # 使用行级锁重新查询，防止并发问题
                    order_locked = Order.query.filter_by(out_trade_no=order.out_trade_no).with_for_update().first()
                    
                    # 二次校验状态，防止异步回调已经处理
                    if order_locked and order_locked.status == 'PENDING':
                        # 更新订单
                        order_locked.status = 'PAID'
                        order_locked.trade_no = alipay_result.get('trade_no')
                        if not order_locked.paid_at:
                            order_locked.paid_at = get_bj_now()
                        
                        # 增加用户积分
                        user = db.session.get(User, order_locked.user_id)
                        if user:
                            user.points += order_locked.points
                            system_logger.info(f"定时任务-订单支付成功", order_id=order_locked.out_trade_no, points=order_locked.points, user_id=user.id)
                            updated_count += 1
                        
                        db.session.commit()
                    elif order_locked and order_locked.status == 'PAID':
                        # 订单已经被处理，跳过
                        logging.info(f"定时任务-订单 {order.out_trade_no} 已被处理，跳过")
            except Exception as e:
                db.session.rollback()
                logging.error(f"定时任务处理订单 {order.out_trade_no} 失败: {str(e)}")
        
        if updated_count > 0:
            logging.info(f"定时任务完成，帮助更新了{updated_count}个订单")
    
    except Exception as e:
        logging.error(f"定时任务异常: {str(e)}", exc_info=True)

# 导入模律（必需在 db.create_all() 之前导入）

def create_app():
    app = Flask(__name__)
    app.config.from_object(Config)
    
    # 初始化扩展
    db.init_app(app)
    redis_client.init_app(app)
    migrate.init_app(app, db)
    
    # 注册蓝图
    app.register_blueprint(auth_bp)
    app.register_blueprint(api_bp)
    app.register_blueprint(admin_bp)
    app.register_blueprint(payment_bp)
    
    from flask import g, session
    from models import User, SystemLog
    
    @app.before_request
    def load_user():
        """在每个请求前加载用户信息到 g，供日志系统使用"""
        user_id = session.get('user_id')
        if user_id:
            g.user_id = user_id
            g.user = db.session.get(User, user_id)
        else:
            g.user_id = None
            g.user = None

    @app.context_processor
    def inject_menu():
        """将导航菜单注入所有模板，实现服务端渲染，解决闪烁问题"""
        from blueprints.auth import get_user_menu
        menu = get_user_menu(g.user) if hasattr(g, 'user') else []
        return dict(nav_menu=menu)

    @app.route('/api/system_logs')
    def get_system_logs():
        """获取系统日志数据 (供后台管理界面使用)"""
        # 这里可以加入权限检查
        logs = SystemLog.query.order_by(SystemLog.created_at.desc()).limit(100).all()
        return jsonify([{
            'id': log.id,
            'user_id': log.user_id,
            'level': log.level,
            'module': log.module,
            'message': log.message,
            'extra': log.extra,
            'ip': log.ip,
            'path': log.path,
            'method': log.method,
            'user_agent': log.user_agent,
            'created_at': log.created_at_bj.strftime('%Y-%m-%d %H:%M:%S')
        } for log in logs])
    
    @app.route('/')
    def index():
        return render_template('index.html')
        
    @app.route('/ocr')
    def ocr():
        return render_template('ocr.html')
        
    @app.route('/visualizer')
    def visualizer():
        return render_template('kongzhiqi.html')
        
    @app.route('/video')
    def video_page():
        return render_template('video.html')

    @app.route('/files/<path:filename>')
    def get_file(filename):
        """Proxy route to serve files from MinIO via the backend"""
        try:
            # Use s3_client to get the object
            file_obj = s3_client.get_object(Bucket=Config.MINIO["bucket"], Key=filename)
            
            def generate():
                for chunk in file_obj['Body'].iter_chunks(chunk_size=4096):
                    yield chunk
                    
            return Response(
                stream_with_context(generate()),
                mimetype=file_obj['ContentType'],
                headers={
                    "Cache-Control": "public, max-age=86400"
                }
            )
        except Exception as e:
            # system_logger.error(f"File proxy error: {str(e)}") # Optional logging
            return jsonify({"error": "File not found"}), 404
        
    # 自动创建数据库表
    with app.app_context():
        print("🔧 正在检查并创建数据库表...")
        db.create_all()
        print("✅ 数据库表已就绪")
        
        # 创建并启动定时任务调度器
        try:
            scheduler = BackgroundScheduler(daemon=True)
            # 每分钟检查一次待支付订单
            scheduler.add_job(
                func=sync_pending_orders,
                trigger=IntervalTrigger(minutes=1),
                id='sync_pending_orders',
                name='同步待支付订单',
                replace_existing=True
            )
            scheduler.start()
            print("🚀 定时任务引擎已启动，将每分钟检查一次待支付订单")
        except Exception as e:
            print(f"⚠️  定时任务启动失败: {str(e)}")
        
    return app

app = create_app()

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000, debug=True)