"""
主路由
"""
import logging
from datetime import datetime
from typing import Dict, Any, List

from flask import Flask, render_template, jsonify, request

from app.camera_manager import CameraManager

logger = logging.getLogger(__name__)

# 创建摄像头管理器实例（可通过依赖注入覆盖）
_camera_manager: CameraManager = None


def get_camera_manager() -> CameraManager:
    """获取摄像头管理器实例（支持依赖注入）"""
    global _camera_manager
    if _camera_manager is None:
        _camera_manager = CameraManager()
    return _camera_manager


def set_camera_manager(manager: CameraManager) -> None:
    """设置摄像头管理器实例（用于测试）"""
    global _camera_manager
    _camera_manager = manager


def register_main_routes(app: Flask) -> None:
    """注册主路由到Flask应用"""
    
    @app.route('/')
    def index() -> str:
        """主页面 - 显示6个摄像头的网格布局"""
        camera_manager = get_camera_manager()
        cameras = camera_manager.get_all_cameras()
        return render_template(
            'index.html',
            cameras=cameras,
            current_time=datetime.now().strftime('%Y-%m-%d %H:%M:%S')
        )
    
    @app.route('/api/cameras')
    def get_cameras() -> Dict[str, List[Dict[str, Any]]]:
        """获取摄像头列表API"""
        camera_manager = get_camera_manager()
        cameras = camera_manager.get_all_cameras()
        return jsonify(cameras)
    
    @app.route('/api/refresh/<int:camera_id>', methods=['POST'])
    def refresh_camera(camera_id: int) -> Dict[str, Any]:
        """刷新指定摄像头"""
        camera_manager = get_camera_manager()
        success = camera_manager.refresh_camera(camera_id)
        return jsonify({'success': success, 'camera_id': camera_id})
    
    @app.route('/api/switch', methods=['POST'])
    def switch_camera() -> Dict[str, Any]:
        """切换摄像头编号"""
        camera_manager = get_camera_manager()
        data = request.get_json()
        
        if not data:
            return jsonify({'success': False, 'error': '无效的请求数据'}), 400
        
        camera_id = data.get('camera_id')
        camera_number = data.get('camera_number', 'mixed')
        
        if camera_id is None:
            return jsonify({'success': False, 'error': '缺少camera_id参数'}), 400
        
        try:
            url = camera_manager.get_camera_url(camera_id, camera_number)
            return jsonify({'success': True, 'url': url})
        except ValueError as e:
            return jsonify({'success': False, 'error': str(e)}), 400
        except Exception as e:
            logger.error(f"切换摄像头失败: {e}")
            return jsonify({'success': False, 'error': '内部服务器错误'}), 500
    
    @app.route('/api/health')
    def health_check() -> Dict[str, Any]:
        """健康检查API"""
        camera_manager = get_camera_manager()
        is_connected = camera_manager.check_connection()
        return jsonify({
            'status': 'healthy' if is_connected else 'degraded',
            'connection': is_connected,
            'timestamp': datetime.now().isoformat()
        })