/**
 * 智能项圈预警控制器
 * @file smartCollarAlertController.js
 * @description 处理智能项圈预警相关的请求
 */

const { IotXqClient } = require('../models');
const { Op } = require('sequelize');

/**
 * 获取智能项圈预警统计
 * @param {Object} req - 请求对象
 * @param {Object} res - 响应对象
 */
exports.getCollarAlertStats = async (req, res) => {
  try {
    console.log('=== 获取智能项圈预警统计 ===');
    
    // 获取项圈设备总数
    const totalDevices = await IotXqClient.count();
    console.log('项圈设备总数:', totalDevices);
    
    // 获取所有设备数据用于生成预警统计
    const allDevices = await IotXqClient.findAll({
      order: [['uptime', 'DESC'], ['id', 'DESC']]
    });
    
    // 统计各类预警数量
    let stats = {
      totalDevices: totalDevices,
      lowBattery: 0,
      offline: 0,
      highTemperature: 0,
      lowTemperature: 0,
      abnormalMovement: 0,
      wearOff: 0,
      totalAlerts: 0
    };
    
    allDevices.forEach(device => {
      const actualBattery = parseInt(device.battery) || 0;
      const actualTemperature = parseFloat(device.temperature) || 0;
      const totalSteps = parseInt(device.steps) || 0;
      const yesterdaySteps = parseInt(device.y_steps) || 0;
      const dailySteps = totalSteps - yesterdaySteps;
      
      // 离线预警
      if (device.state === 0) {
        stats.offline++;
        stats.totalAlerts++;
      }
      
      // 低电量预警
      if (actualBattery > 0 && actualBattery < 20) {
        stats.lowBattery++;
        stats.totalAlerts++;
      }
      
      // 温度预警
      if (actualTemperature > 0) {
        if (actualTemperature < 30) {
          stats.lowTemperature++;
          stats.totalAlerts++;
        } else if (actualTemperature > 40) {
          stats.highTemperature++;
          stats.totalAlerts++;
        }
      }
      
      // 异常运动预警
      if (dailySteps === 0 && totalSteps > 0) {
        stats.abnormalMovement++;
        stats.totalAlerts++;
      }
      
      // 项圈脱落预警
      if (device.bandge_status === 0) {
        stats.wearOff++;
        stats.totalAlerts++;
      }
    });
    
    console.log('预警统计结果:', stats);
    
    res.json({
      success: true,
      data: stats,
      message: '获取智能项圈预警统计成功'
    });
  } catch (error) {
    console.error('获取智能项圈预警统计失败:', error);
    res.status(500).json({
      success: false,
      message: '获取智能项圈预警统计失败',
      error: error.message
    });
  }
};

/**
 * 获取智能项圈预警列表
 * @param {Object} req - 请求对象
 * @param {Object} res - 响应对象
 */
exports.getCollarAlerts = async (req, res) => {
  try {
    const { 
      page = 1, 
      limit = 10, 
      status, 
      search, 
      alertType,
      alertLevel,
      startDate,
      endDate
    } = req.query;
    
    const offset = (page - 1) * limit;
    
    console.log('智能项圈预警API请求参数:', { 
      page, limit, status, search, alertType, alertLevel, startDate, endDate 
    });
    
    // 构建查询条件
    const whereConditions = {};
    
    // 状态筛选
    if (status) {
      switch (status) {
        case 'online':
          whereConditions.state = 1;
          break;
        case 'offline':
          whereConditions.state = 0;
          break;
        case 'alarm':
          whereConditions.state = 2;
          break;
        case 'maintenance':
          whereConditions.state = 3;
          break;
      }
    }
    
    // 搜索条件
    if (search) {
      whereConditions[Op.or] = [
        { sn: { [Op.like]: `%${search}%` } },
        { deviceId: { [Op.like]: `%${search}%` } }
      ];
    }
    
    // 时间范围筛选
    if (startDate || endDate) {
      whereConditions.uptime = {};
      if (startDate) {
        whereConditions.uptime[Op.gte] = new Date(startDate);
      }
      if (endDate) {
        whereConditions.uptime[Op.lte] = new Date(endDate);
      }
    }
    
    // 查询所有符合条件的设备数据
    const allDevices = await IotXqClient.findAll({
      where: whereConditions,
      order: [['uptime', 'DESC'], ['id', 'DESC']]
    });
    
    // 生成预警数据
    const allAlerts = [];
    
    allDevices.forEach(device => {
      const deviceId = device.sn || `COLLAR${device.id}`;
      const alertTime = new Date(device.uptime || Date.now()).toISOString().replace('T', ' ').substring(0, 19);
      
      const actualBattery = parseInt(device.battery) || 0;
      const actualTemperature = parseFloat(device.temperature) || 0;
      const totalSteps = parseInt(device.steps) || 0;
      const yesterdaySteps = parseInt(device.y_steps) || 0;
      const dailySteps = totalSteps - yesterdaySteps;
      
      // 添加基础信息到预警的函数
      const addBaseInfoToAlert = (alert) => {
        alert.deviceId = device.id;
        alert.deviceName = deviceId;
        alert.collarNumber = deviceId;
        alert.dailySteps = dailySteps;
        alert.totalSteps = totalSteps;
        alert.yesterdaySteps = yesterdaySteps;
        alert.battery = actualBattery;
        alert.temperature = actualTemperature;
        alert.alertTime = alertTime;
        alert.deviceStatus = device.state === 1 ? '在线' : '离线';
        alert.gpsSignal = device.state === 1 ? '强' : '无';
        alert.wearStatus = device.bandge_status === 1 ? '已佩戴' : '未佩戴';
        alert.longitude = 116.3974 + (device.id % 100) * 0.0001;
        alert.latitude = 39.9093 + (device.id % 100) * 0.0001;
        return alert;
      };
      
      // 离线预警
      if (device.state === 0) {
        allAlerts.push(addBaseInfoToAlert({
          id: `${device.id}_offline`,
          alertType: 'offline',
          alertLevel: 'high',
          description: '设备已离线超过30分钟',
          movementStatus: '静止'
        }));
      }
      
      // 低电量预警
      if (actualBattery > 0 && actualBattery < 20) {
        allAlerts.push(addBaseInfoToAlert({
          id: `${device.id}_battery`,
          alertType: 'battery',
          alertLevel: actualBattery < 10 ? 'high' : 'medium',
          description: `设备电量低于20%，当前电量${actualBattery}%`,
          movementStatus: '正常'
        }));
      }
      
      // 温度预警
      if (actualTemperature > 0) {
        if (actualTemperature < 30) {
          allAlerts.push(addBaseInfoToAlert({
            id: `${device.id}_temperature_low`,
            alertType: 'temperature',
            alertLevel: actualTemperature < 20 ? 'high' : 'medium',
            description: `设备温度过低，当前温度${actualTemperature}°C`,
            movementStatus: '正常'
          }));
        } else if (actualTemperature > 40) {
          allAlerts.push(addBaseInfoToAlert({
            id: `${device.id}_temperature_high`,
            alertType: 'temperature',
            alertLevel: actualTemperature > 45 ? 'high' : 'medium',
            description: `设备温度过高，当前温度${actualTemperature}°C`,
            movementStatus: '正常'
          }));
        }
      }
      
      // 异常运动预警
      if (dailySteps === 0 && totalSteps > 0) {
        allAlerts.push(addBaseInfoToAlert({
          id: `${device.id}_movement_zero`,
          alertType: 'movement',
          alertLevel: 'high',
          description: '检测到步数异常，当日运动量为0步，可能为设备故障或动物异常',
          movementStatus: '异常'
        }));
      }
      
      // 项圈脱落预警
      if (device.bandge_status === 0) {
        allAlerts.push(addBaseInfoToAlert({
          id: `${device.id}_wear`,
          alertType: 'wear',
          alertLevel: 'high',
          description: '设备佩戴状态异常，可能已脱落',
          movementStatus: '正常'
        }));
      }
    });
    
    // 预警类型筛选
    let filteredAlerts = allAlerts;
    if (alertType && alertType.trim() !== '') {
      filteredAlerts = allAlerts.filter(alert => alert.alertType === alertType);
    }
    
    // 预警级别筛选
    if (alertLevel && alertLevel.trim() !== '') {
      filteredAlerts = filteredAlerts.filter(alert => alert.alertLevel === alertLevel);
    }
    
    // 计算统计数据
    const stats = {
      lowBattery: filteredAlerts.filter(alert => alert.alertType === 'battery').length,
      offline: filteredAlerts.filter(alert => alert.alertType === 'offline').length,
      highTemperature: filteredAlerts.filter(alert => alert.alertType === 'temperature').length,
      abnormalMovement: filteredAlerts.filter(alert => alert.alertType === 'movement').length,
      wearOff: filteredAlerts.filter(alert => alert.alertType === 'wear').length
    };
    
    // 分页处理
    const startIndex = parseInt(offset);
    const endIndex = startIndex + parseInt(limit);
    const paginatedAlerts = filteredAlerts.slice(startIndex, endIndex);
    
    res.json({
      success: true,
      data: paginatedAlerts,
      total: filteredAlerts.length,
      stats: stats,
      pagination: {
        page: parseInt(page),
        limit: parseInt(limit),
        total: filteredAlerts.length,
        pages: Math.ceil(filteredAlerts.length / limit)
      },
      message: '获取智能项圈预警列表成功'
    });
  } catch (error) {
    console.error('获取智能项圈预警列表失败:', error);
    res.status(500).json({
      success: false,
      message: '获取智能项圈预警列表失败',
      error: error.message
    });
  }
};

/**
 * 获取单个智能项圈预警详情
 * @param {Object} req - 请求对象
 * @param {Object} res - 响应对象
 */
exports.getCollarAlertById = async (req, res) => {
  try {
    const { id } = req.params;
    
    // 解析预警ID，格式为 deviceId_alertType
    const [deviceId, alertType] = id.split('_');
    
    if (!deviceId || !alertType) {
      return res.status(400).json({
        success: false,
        message: '无效的预警ID格式'
      });
    }
    
    // 查找设备
    const device = await IotXqClient.findByPk(deviceId);
    if (!device) {
      return res.status(404).json({
        success: false,
        message: '设备不存在'
      });
    }
    
    const deviceNumber = device.sn || `COLLAR${device.id}`;
    const alertTime = new Date(device.uptime || Date.now()).toISOString().replace('T', ' ').substring(0, 19);
    
    const actualBattery = parseInt(device.battery) || 0;
    const actualTemperature = parseFloat(device.temperature) || 0;
    const totalSteps = parseInt(device.steps) || 0;
    const yesterdaySteps = parseInt(device.y_steps) || 0;
    const dailySteps = totalSteps - yesterdaySteps;
    
    // 根据预警类型生成详情
    let alertDetail = {
      id: id,
      deviceId: device.id,
      deviceName: deviceNumber,
      collarNumber: deviceNumber,
      alertType: alertType,
      alertTime: alertTime,
      battery: actualBattery,
      temperature: actualTemperature,
      dailySteps: dailySteps,
      totalSteps: totalSteps,
      yesterdaySteps: yesterdaySteps,
      deviceStatus: device.state === 1 ? '在线' : '离线',
      gpsSignal: device.state === 1 ? '强' : '无',
      wearStatus: device.bandge_status === 1 ? '已佩戴' : '未佩戴',
      longitude: 116.3974 + (device.id % 100) * 0.0001,
      latitude: 39.9093 + (device.id % 100) * 0.0001,
      movementStatus: '正常'
    };
    
    // 根据预警类型设置具体信息
    switch (alertType) {
      case 'offline':
        alertDetail.alertLevel = 'high';
        alertDetail.description = '设备已离线超过30分钟';
        alertDetail.movementStatus = '静止';
        break;
      case 'battery':
        alertDetail.alertLevel = actualBattery < 10 ? 'high' : 'medium';
        alertDetail.description = `设备电量低于20%，当前电量${actualBattery}%`;
        break;
      case 'temperature':
        if (actualTemperature < 30) {
          alertDetail.alertLevel = actualTemperature < 20 ? 'high' : 'medium';
          alertDetail.description = `设备温度过低，当前温度${actualTemperature}°C`;
        } else if (actualTemperature > 40) {
          alertDetail.alertLevel = actualTemperature > 45 ? 'high' : 'medium';
          alertDetail.description = `设备温度过高，当前温度${actualTemperature}°C`;
        }
        break;
      case 'movement':
        alertDetail.alertLevel = 'high';
        alertDetail.description = '检测到步数异常，当日运动量为0步，可能为设备故障或动物异常';
        alertDetail.movementStatus = '异常';
        break;
      case 'wear':
        alertDetail.alertLevel = 'high';
        alertDetail.description = '设备佩戴状态异常，可能已脱落';
        break;
    }
    
    res.json({
      success: true,
      data: alertDetail,
      message: '获取智能项圈预警详情成功'
    });
  } catch (error) {
    console.error('获取智能项圈预警详情失败:', error);
    res.status(500).json({
      success: false,
      message: '获取智能项圈预警详情失败',
      error: error.message
    });
  }
};

/**
 * 处理智能项圈预警
 * @param {Object} req - 请求对象
 * @param {Object} res - 响应对象
 */
exports.handleCollarAlert = async (req, res) => {
  try {
    const { id } = req.params;
    const { action, notes, handler } = req.body;
    
    // 解析预警ID
    const [deviceId, alertType] = id.split('_');
    
    if (!deviceId || !alertType) {
      return res.status(400).json({
        success: false,
        message: '无效的预警ID格式'
      });
    }
    
    // 这里可以实现预警处理逻辑，比如记录处理历史、发送通知等
    // 目前只是返回成功响应
    const result = {
      alertId: id,
      action: action || 'acknowledged',
      notes: notes || '',
      handler: handler || 'system',
      processedAt: new Date().toISOString(),
      status: 'processed'
    };
    
    console.log('处理智能项圈预警:', result);
    
    res.json({
      success: true,
      data: result,
      message: '预警处理成功'
    });
  } catch (error) {
    console.error('处理智能项圈预警失败:', error);
    res.status(500).json({
      success: false,
      message: '处理智能项圈预警失败',
      error: error.message
    });
  }
};

/**
 * 批量处理智能项圈预警
 * @param {Object} req - 请求对象
 * @param {Object} res - 响应对象
 */
exports.batchHandleCollarAlerts = async (req, res) => {
  try {
    const { alertIds, action, notes, handler } = req.body;
    
    if (!alertIds || !Array.isArray(alertIds) || alertIds.length === 0) {
      return res.status(400).json({
        success: false,
        message: '请提供有效的预警ID列表'
      });
    }
    
    const results = [];
    
    for (const alertId of alertIds) {
      const [deviceId, alertType] = alertId.split('_');
      
      if (deviceId && alertType) {
        results.push({
          alertId: alertId,
          action: action || 'acknowledged',
          notes: notes || '',
          handler: handler || 'system',
          processedAt: new Date().toISOString(),
          status: 'processed'
        });
      }
    }
    
    console.log('批量处理智能项圈预警:', results);
    
    res.json({
      success: true,
      data: {
        processedCount: results.length,
        results: results
      },
      message: `成功处理 ${results.length} 个预警`
    });
  } catch (error) {
    console.error('批量处理智能项圈预警失败:', error);
    res.status(500).json({
      success: false,
      message: '批量处理智能项圈预警失败',
      error: error.message
    });
  }
};

/**
 * 导出智能项圈预警数据
 * @param {Object} req - 请求对象
 * @param {Object} res - 响应对象
 */
exports.exportCollarAlerts = async (req, res) => {
  try {
    const { 
      search, 
      alertType, 
      alertLevel, 
      startDate, 
      endDate,
      format = 'json'
    } = req.query;
    
    // 构建查询条件（与获取列表相同的逻辑）
    const whereConditions = {};
    
    if (search) {
      whereConditions[Op.or] = [
        { sn: { [Op.like]: `%${search}%` } },
        { deviceId: { [Op.like]: `%${search}%` } }
      ];
    }
    
    if (startDate || endDate) {
      whereConditions.uptime = {};
      if (startDate) {
        whereConditions.uptime[Op.gte] = new Date(startDate);
      }
      if (endDate) {
        whereConditions.uptime[Op.lte] = new Date(endDate);
      }
    }
    
    // 获取所有设备数据
    const allDevices = await IotXqClient.findAll({
      where: whereConditions,
      order: [['uptime', 'DESC'], ['id', 'DESC']]
    });
    
    // 生成预警数据（与获取列表相同的逻辑）
    const allAlerts = [];
    
    allDevices.forEach(device => {
      const deviceId = device.sn || `COLLAR${device.id}`;
      const alertTime = new Date(device.uptime || Date.now()).toISOString().replace('T', ' ').substring(0, 19);
      
      const actualBattery = parseInt(device.battery) || 0;
      const actualTemperature = parseFloat(device.temperature) || 0;
      const totalSteps = parseInt(device.steps) || 0;
      const yesterdaySteps = parseInt(device.y_steps) || 0;
      const dailySteps = totalSteps - yesterdaySteps;
      
      // 添加基础信息到预警的函数
      const addBaseInfoToAlert = (alert) => {
        alert.deviceId = device.id;
        alert.deviceName = deviceId;
        alert.collarNumber = deviceId;
        alert.dailySteps = dailySteps;
        alert.totalSteps = totalSteps;
        alert.yesterdaySteps = yesterdaySteps;
        alert.battery = actualBattery;
        alert.temperature = actualTemperature;
        alert.alertTime = alertTime;
        alert.deviceStatus = device.state === 1 ? '在线' : '离线';
        alert.gpsSignal = device.state === 1 ? '强' : '无';
        alert.wearStatus = device.bandge_status === 1 ? '已佩戴' : '未佩戴';
        alert.longitude = 116.3974 + (device.id % 100) * 0.0001;
        alert.latitude = 39.9093 + (device.id % 100) * 0.0001;
        return alert;
      };
      
      // 生成各类预警（与获取列表相同的逻辑）
      if (device.state === 0) {
        allAlerts.push(addBaseInfoToAlert({
          id: `${device.id}_offline`,
          alertType: 'offline',
          alertLevel: 'high',
          description: '设备已离线超过30分钟',
          movementStatus: '静止'
        }));
      }
      
      if (actualBattery > 0 && actualBattery < 20) {
        allAlerts.push(addBaseInfoToAlert({
          id: `${device.id}_battery`,
          alertType: 'battery',
          alertLevel: actualBattery < 10 ? 'high' : 'medium',
          description: `设备电量低于20%，当前电量${actualBattery}%`,
          movementStatus: '正常'
        }));
      }
      
      if (actualTemperature > 0) {
        if (actualTemperature < 30) {
          allAlerts.push(addBaseInfoToAlert({
            id: `${device.id}_temperature_low`,
            alertType: 'temperature',
            alertLevel: actualTemperature < 20 ? 'high' : 'medium',
            description: `设备温度过低，当前温度${actualTemperature}°C`,
            movementStatus: '正常'
          }));
        } else if (actualTemperature > 40) {
          allAlerts.push(addBaseInfoToAlert({
            id: `${device.id}_temperature_high`,
            alertType: 'temperature',
            alertLevel: actualTemperature > 45 ? 'high' : 'medium',
            description: `设备温度过高，当前温度${actualTemperature}°C`,
            movementStatus: '正常'
          }));
        }
      }
      
      if (dailySteps === 0 && totalSteps > 0) {
        allAlerts.push(addBaseInfoToAlert({
          id: `${device.id}_movement_zero`,
          alertType: 'movement',
          alertLevel: 'high',
          description: '检测到步数异常，当日运动量为0步，可能为设备故障或动物异常',
          movementStatus: '异常'
        }));
      }
      
      if (device.bandge_status === 0) {
        allAlerts.push(addBaseInfoToAlert({
          id: `${device.id}_wear`,
          alertType: 'wear',
          alertLevel: 'high',
          description: '设备佩戴状态异常，可能已脱落',
          movementStatus: '正常'
        }));
      }
    });
    
    // 应用筛选条件
    let filteredAlerts = allAlerts;
    if (alertType && alertType.trim() !== '') {
      filteredAlerts = allAlerts.filter(alert => alert.alertType === alertType);
    }
    if (alertLevel && alertLevel.trim() !== '') {
      filteredAlerts = filteredAlerts.filter(alert => alert.alertLevel === alertLevel);
    }
    
    // 根据格式返回数据
    if (format === 'csv') {
      // 这里可以实现CSV格式导出
      res.setHeader('Content-Type', 'text/csv');
      res.setHeader('Content-Disposition', 'attachment; filename="collar_alerts.csv"');
      res.send('CSV格式导出功能待实现');
    } else {
      res.json({
        success: true,
        data: filteredAlerts,
        total: filteredAlerts.length,
        message: '导出智能项圈预警数据成功'
      });
    }
  } catch (error) {
    console.error('导出智能项圈预警数据失败:', error);
    res.status(500).json({
      success: false,
      message: '导出智能项圈预警数据失败',
      error: error.message
    });
  }
};