# 文件路径: inventory-backend/app/__init__.py

from flask import Flask
from config import Config
from app.extensions import db, migrate, cors
import os

def create_app():
    app = Flask(__name__)
    app.config.from_object(Config)

    # 1. 初始化插件
    db.init_app(app)
    migrate.init_app(app, db)

    # 确保跨域配置
    # 允许 /api/ 开头的请求跨域
    cors.init_app(app, resources={r"/*": {"origins": "*"}}) # 放宽跨域限制，防止图片访问被拦截

    # =========================================================
    # 2. 注册蓝图 (Blueprints)
    # =========================================================

    # -----------------------------------------------------
    # 2.1 注册入库聚合模块 (Inbound)
    # -----------------------------------------------------
    try:
        # 指向聚合文件: app/api/v1/inbound/__init__.py
        from app.api.v1.inbound import inbound_bp

        # 注册父蓝图，路由前缀为 /api/v1/inbound
        app.register_blueprint(inbound_bp, url_prefix='/api/v1/inbound')

        print("✅ Inbound (Buy, Semi, Product, Base) 模块注册成功")

    except ImportError as e:
        print(f"❌ 错误: Inbound 模块导入失败: {e}")

    # -----------------------------------------------------
    # 2.2 注册通用打印模块 (Common Print)
    # -----------------------------------------------------
    try:
        from app.api.v1.common.print import print_bp

        # 注册打印蓝图
        app.register_blueprint(print_bp, url_prefix='/api/v1/common/print')

        print("✅ Print (Label Printing) 模块注册成功")

    except ImportError as e:
        print(f"❌ 错误: Print 模块导入失败: {e}")

    # -----------------------------------------------------
    # 2.3 [新增] 注册通用上传模块 (Common Upload)
    # -----------------------------------------------------
    try:
        from app.api.v1.common.upload import upload_bp

        # 【核心修改】注册方式 1: 标准路径 (对应 /api/v1/common/files/xxx)
        app.register_blueprint(upload_bp, url_prefix='/api/v1/common')

        # 【核心修改】注册方式 2: 兼容路径 (对应 /v1/common/files/xxx)
        # 解决部分代理服务器剥离 /api 前缀导致的 404 问题
        # name='upload_fallback' 防止蓝图名称冲突
        app.register_blueprint(upload_bp, url_prefix='/v1/common', name='upload_fallback')

        print("✅ Upload (File Storage) 模块注册成功 (双路径兼容模式)")

    except ImportError as e:
        print(f"❌ 错误: Upload 模块导入失败: {e}")

    # =========================================================
    # 3. 预加载数据模型 (解决 relationship 找不到模型的问题)
    # =========================================================
    with app.app_context():
        try:
            # 1. 基础物料
            from app.models.base import MaterialBase
            # 2. 采购入库
            from app.models.inbound.buy import StockBuy
            # 3. 半成品入库
            from app.models.inbound.semi import StockSemi
            # 4. 成品入库
            from app.models.inbound.product import StockProduct

            # 开发环境如果需要自动建表，可以取消注释
            # db.create_all()

        except ImportError as e:
            # 建议打印错误，防止因为文件名拼写错误导致静默失败
            print(f"⚠️ 模型预加载失败: {e}")
        except Exception as e:
            print(f"⚠️ 模型预加载发生未知错误: {e}")

    return app