const express = require('express');
const router = express.Router();
const Vehicle = require('../models/Vehicle');

// 获取所有车辆（支持按 storeId 过滤）
router.get('/', async (req, res) => {
  try {
    const filter = {};
    if (req.query.storeId) {
      filter.storeId = req.query.storeId;
    }
    const vehicles = await Vehicle.find(filter).populate('currentOrderId');
    res.json({ success: true, data: vehicles });
  } catch (error) {
    res.status(500).json({ success: false, message: error.message });
  }
});

// 获取单个车辆
router.get('/:id', async (req, res) => {
  try {
    const vehicle = await Vehicle.findById(req.params.id).populate('currentOrderId');
    if (!vehicle) {
      return res.status(404).json({ success: false, message: '车辆不存在' });
    }
    res.json({ success: true, data: vehicle });
  } catch (error) {
    res.status(500).json({ success: false, message: error.message });
  }
});

// 创建车辆
router.post('/', async (req, res) => {
  try {
    const data = { ...req.body };
    // status 为"在租"时自动设置 isRented
    if (data.status === '在租') {
      data.isRented = true;
    }
    const vehicle = new Vehicle(data);
    await vehicle.save();
    res.status(201).json({ success: true, data: vehicle });
  } catch (error) {
    res.status(400).json({ success: false, message: error.message });
  }
});

// 更新车辆
router.put('/:id', async (req, res) => {
  try {
    const data = { ...req.body };
    // status 变化时同步 isRented
    if (data.status !== undefined) {
      data.isRented = data.status === '在租';
    }
    const vehicle = await Vehicle.findByIdAndUpdate(
      req.params.id,
      data,
      { new: true, runValidators: true }
    );
    if (!vehicle) {
      return res.status(404).json({ success: false, message: '车辆不存在' });
    }
    res.json({ success: true, data: vehicle });
  } catch (error) {
    res.status(400).json({ success: false, message: error.message });
  }
});

// 删除车辆
router.delete('/:id', async (req, res) => {
  try {
    const vehicle = await Vehicle.findByIdAndDelete(req.params.id);
    if (!vehicle) {
      return res.status(404).json({ success: false, message: '车辆不存在' });
    }
    res.json({ success: true, message: '车辆已删除' });
  } catch (error) {
    res.status(500).json({ success: false, message: error.message });
  }
});

// 按状态筛选车辆
router.get('/status/:status', async (req, res) => {
  try {
    const vehicles = await Vehicle.find({ status: req.params.status });
    res.json({ success: true, data: vehicles });
  } catch (error) {
    res.status(500).json({ success: false, message: error.message });
  }
});

// 更新车辆位置
router.patch('/:id/location', async (req, res) => {
  try {
    const { longitude, latitude } = req.body;
    const vehicle = await Vehicle.findByIdAndUpdate(
      req.params.id,
      {
        location: {
          type: 'Point',
          coordinates: [longitude, latitude]
        },
        lastLocationUpdate: new Date()
      },
      { new: true }
    );
    if (!vehicle) {
      return res.status(404).json({ success: false, message: '车辆不存在' });
    }
    res.json({ success: true, data: vehicle });
  } catch (error) {
    res.status(400).json({ success: false, message: error.message });
  }
});

module.exports = router;