#!/usr/bin/env python
"""
验证虚拟环境和项目设置

检查:
- Python版本
- 依赖包安装
- 数据库连接
- Flask应用创建
"""
import sys
import os
from pathlib import Path

def check_python_version():
    """检查Python版本"""
    version = sys.version_info
    print(f"Python版本: {version.major}.{version.minor}.{version.micro}")
    
    if version.major < 3 or (version.major == 3 and version.minor < 8):
        print("❌ 需要Python 3.8或更高版本")
        return False
    
    print("✓ Python版本符合要求")
    return True


def check_dependencies():
    """检查关键依赖"""
    dependencies = [
        ('flask', 'Flask'),
        ('sqlalchemy', 'SQLAlchemy'),
        ('celery', 'Celery'),
        ('boto3', 'AWS SDK'),
        ('pytest', 'Pytest'),
        ('bcrypt', 'bcrypt'),
        ('cryptography', 'Cryptography'),
    ]
    
    print("\n检查依赖包:")
    all_ok = True
    
    for module_name, display_name in dependencies:
        try:
            module = __import__(module_name)
            version = getattr(module, '__version__', 'unknown')
            print(f"  ✓ {display_name}: {version}")
        except ImportError:
            print(f"  ❌ {display_name}: 未安装")
            all_ok = False
    
    return all_ok


def check_flask_app():
    """检查Flask应用创建"""
    print("\n检查Flask应用:")
    try:
        from app import create_app, db
        app = create_app('testing')  # 使用测试配置
        
        with app.app_context():
            # 检查数据库连接 (SQLAlchemy 2.0+ 语法)
            with db.engine.connect() as conn:
                conn.execute(db.text('SELECT 1'))
            print("  ✓ Flask应用创建成功")
            print("  ✓ 数据库连接正常")
            return True
    except Exception as e:
        print(f"  ❌ Flask应用检查失败: {e}")
        return False


def check_database():
    """检查数据库文件"""
    print("\n检查数据库:")
    
    # 检查开发数据库
    dev_db = Path('instance/dev.db')
    if dev_db.exists():
        print(f"  ✓ 开发数据库存在: {dev_db}")
        print(f"    大小: {dev_db.stat().st_size} bytes")
    else:
        print("  ⚠️  开发数据库不存在，运行 'python init_db.py' 创建")
    
    return True


def check_directories():
    """检查必要目录"""
    print("\n检查目录结构:")
    
    directories = [
        'app',
        'config', 
        'migrations',
        'tests',
        'instance',
        'uploads',
        'reports'
    ]
    
    all_ok = True
    for directory in directories:
        path = Path(directory)
        if path.exists():
            print(f"  ✓ {directory}/")
        else:
            print(f"  ⚠️  {directory}/ 不存在")
            if directory in ['uploads', 'reports']:
                # 这些目录会在应用启动时自动创建
                pass
            else:
                all_ok = False
    
    return all_ok


def main():
    print("="*50)
    print("虚拟环境和项目设置验证")
    print("="*50)
    
    checks = [
        ("Python版本", check_python_version),
        ("依赖包", check_dependencies),
        ("目录结构", check_directories),
        ("数据库", check_database),
        ("Flask应用", check_flask_app),
    ]
    
    results = []
    for name, check_func in checks:
        try:
            result = check_func()
            results.append((name, result))
        except Exception as e:
            print(f"  ❌ {name}检查失败: {e}")
            results.append((name, False))
    
    print("\n" + "="*50)
    print("验证结果:")
    print("="*50)
    
    all_passed = True
    for name, result in results:
        status = "✓ 通过" if result else "❌ 失败"
        print(f"  {name}: {status}")
        if not result:
            all_passed = False
    
    if all_passed:
        print("\n🎉 所有检查通过! 环境设置正确。")
        print("\n可以开始开发:")
        print("  python run.py          - 启动Flask应用")
        print("  python init_db.py      - 初始化数据库")
        print("  pytest                 - 运行测试")
    else:
        print("\n⚠️  部分检查失败，请检查上述问题。")
    
    print("="*50)


if __name__ == '__main__':
    main()