"""
定时任务管理API蓝图
提供定时任务的启动、停止、状态查询等接口
"""
from flask import Blueprint, jsonify, request, current_app
from functools import wraps

scheduler_bp = Blueprint('scheduler', __name__, url_prefix='/api/scheduler')

def admin_required(f):
    """装饰器：需要管理员权限"""
    @wraps(f)
    def decorated(*args, **kwargs):
        # 这里可以添加管理员权限验证逻辑
        # 暂时允许所有请求通过
        return f(*args, **kwargs)
    return decorated

@scheduler_bp.route('/status', methods=['GET'])
def get_scheduler_status():
    """获取定时任务状态"""
    try:
        scheduler_manager = current_app.scheduler_manager
        status = scheduler_manager.get_task_status()
        
        return jsonify({
            'success': True,
            'data': status,
            'message': '获取定时任务状态成功'
        })
    except Exception as e:
        return jsonify({
            'success': False,
            'message': f'获取定时任务状态失败: {str(e)}'
        }), 500

@scheduler_bp.route('/start', methods=['POST'])
@admin_required
def start_scheduler():
    """启动定时任务"""
    try:
        data = request.get_json() or {}
        interval_minutes = data.get('interval_minutes', 1)
        
        # 验证间隔时间
        if not isinstance(interval_minutes, (int, float)) or interval_minutes <= 0:
            return jsonify({
                'success': False,
                'message': '无效的间隔时间，必须是大于0的数字'
            }), 400
            
        scheduler_manager = current_app.scheduler_manager
        scheduler_manager.start_graph_rebuild_task(interval_minutes)
        
        return jsonify({
            'success': True,
            'message': f'定时任务已启动，间隔: {interval_minutes}分钟'
        })
    except Exception as e:
        return jsonify({
            'success': False,
            'message': f'启动定时任务失败: {str(e)}'
        }), 500

@scheduler_bp.route('/stop', methods=['POST'])
@admin_required
def stop_scheduler():
    """停止定时任务"""
    try:
        scheduler_manager = current_app.scheduler_manager
        scheduler_manager.stop_graph_rebuild_task()
        
        return jsonify({
            'success': True,
            'message': '定时任务已停止'
        })
    except Exception as e:
        return jsonify({
            'success': False,
            'message': f'停止定时任务失败: {str(e)}'
        }), 500

@scheduler_bp.route('/update-interval', methods=['POST'])
@admin_required
def update_interval():
    """更新任务间隔"""
    try:
        data = request.get_json()
        if not data or 'interval_minutes' not in data:
            return jsonify({
                'success': False,
                'message': '缺少interval_minutes参数'
            }), 400
            
        interval_minutes = data['interval_minutes']
        
        # 验证间隔时间
        if not isinstance(interval_minutes, (int, float)) or interval_minutes <= 0:
            return jsonify({
                'success': False,
                'message': '无效的间隔时间，必须是大于0的数字'
            }), 400
            
        scheduler_manager = current_app.scheduler_manager
        scheduler_manager.update_task_interval(interval_minutes)
        
        return jsonify({
            'success': True,
            'message': f'任务间隔已更新为 {interval_minutes}分钟'
        })
    except Exception as e:
        return jsonify({
            'success': False,
            'message': f'更新任务间隔失败: {str(e)}'
        }), 500

@scheduler_bp.route('/rebuild-now', methods=['POST'])
@admin_required
def rebuild_graph_now():
    """立即执行一次图重建"""
    try:
        scheduler_manager = current_app.scheduler_manager
        
        # 在新线程中执行，避免阻塞请求
        import threading
        thread = threading.Thread(target=scheduler_manager.rebuild_graph_job)
        thread.start()
        
        return jsonify({
            'success': True,
            'message': '图重建任务已开始执行'
        })
    except Exception as e:
        return jsonify({
            'success': False,
            'message': f'执行图重建失败: {str(e)}'
        }), 500

@scheduler_bp.route('/logs', methods=['GET'])
def get_rebuild_logs():
    """获取重建日志统计"""
    try:
        scheduler_manager = current_app.scheduler_manager
        status = scheduler_manager.get_task_status()
        
        log_info = {
            'rebuild_count': status['rebuild_count'],
            'error_count': status['error_count'],
            'last_rebuild_time': status['last_rebuild_time'],
            'success_rate': (
                ((status['rebuild_count'] - status['error_count']) / status['rebuild_count'] * 100)
                if status['rebuild_count'] > 0 else 0
            )
        }
        
        return jsonify({
            'success': True,
            'data': log_info,
            'message': '获取重建日志成功'
        })
    except Exception as e:
        return jsonify({
            'success': False,
            'message': f'获取重建日志失败: {str(e)}'
        }), 500