# app.py
import os
import sys
from flask import Flask
from extensions import db, cors  # ✅ 从 extensions 导入
from models import Device, DeviceHistory, MaintenanceLog # 导入模型以便 SQLAlchemy 识别
from routes.api import api_bp

# 解决 Windows 下控制台输出乱码问题
sys.stdout.reconfigure(encoding='utf-8')


def create_app():
    app = Flask(__name__)

    # 1. 配置路径
    basedir = os.path.abspath(os.path.dirname(__file__))
    instance_path = os.path.join(basedir, 'instance')
    if not os.path.exists(instance_path):
        os.makedirs(instance_path)
        print(f"📁 检测到目录不存在，已自动创建: {instance_path}")

    db_path = os.path.join(instance_path, 'devices.db')

    # 配置
    app.config['SQLALCHEMY_DATABASE_URI'] = f'sqlite:///{db_path}'
    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
    app.config['JSON_AS_ASCII'] = False

    # 2. 初始化插件 (使用 init_app 模式)
    cors.init_app(app)  # ✅
    db.init_app(app)    # ✅

    # 3. 注册蓝图
    # 注意：api.py 里已经写了 url_prefix='/api'，这里不要再写，否则变 /api/api/...
    app.register_blueprint(api_bp)

    # 4. 初始化数据库表
    with app.app_context():
        db.create_all()

    return app


app = create_app()

@app.shell_context_processor
def make_shell_context():
    return {
        'db': db,
        'Device': Device,
        'DeviceHistory': DeviceHistory,
        'MaintenanceLog': MaintenanceLog
    }

if __name__ == '__main__':
    print("🚀 服务正在启动: http://127.0.0.1:5000")
    app.run(debug=True, host='0.0.0.0', port=5000)