// pages/evaluate/index.js
//估价页面 - 简化版三步骤流程

const api = require('../../utils/api');

Page({
  data: {
    currentStep: 1,
    // 月日选择
    selectedMonth: '',
    selectedMonthIndex: 0,
    selectedDay: '',
    selectedDayIndex: 0,
    months: ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12'],
    days: [],
    // 地区和品种选择
    selectedRegion: '',
    selectedRegionIndex: 0,
    selectedBreed: '',
    selectedBreedIndex: 0,
    evaluateResult: {
      estimatedPrice: '0.00',
      priceRange: '0.00 - 0.00',
      confidence: '85%'
    },

    // 地区选项
    regionOptions: [
      '成都市场报价'
    ],
    // 品种选项
    breedOptions: [
      '黄蛋（红蛋）'
    ]
  },

  onLoad() {
    console.log('估价页面初始化 - 简化版')
    
    // 初始化为当前北京时间
    this.initCurrentDate()
  },

  // 初始化当前日期
  initCurrentDate() {
    const now = new Date()
    const currentMonth = (now.getMonth() + 1).toString()
    const currentDate = now.getDate().toString()
    
    // 设置默认月份
    const monthIndex = this.data.months.indexOf(currentMonth)
    this.setData({
      selectedMonth: currentMonth,
      selectedMonthIndex: monthIndex >= 0 ? monthIndex : 0
    })
    
    // 根据当前月份更新日期数组
    this.updateDaysForMonth(currentMonth)
    
    // 设置默认日期
    const dayIndex = this.data.days.indexOf(currentDate)
    this.setData({
      selectedDay: dayIndex >= 0 ? currentDate : '',
      selectedDayIndex: dayIndex >= 0 ? dayIndex : 0
    })
  },

  // 第一步：点击我知道了
  onIKnow() {
    this.setData({
      currentStep: 2
    })
  },

  // 月份选择器变化
  onMonthChange(e) {
    const monthIndex = e.detail.value
    const selectedMonth = this.data.months[monthIndex]
    
    // 更新月份
    this.setData({
      selectedMonth: selectedMonth,
      selectedMonthIndex: monthIndex,
      selectedDay: '', // 清空日期选择
      selectedDayIndex: 0
    })
    
    // 根据月份设置对应的日期数组
    this.updateDaysForMonth(selectedMonth)
  },

  // 日期选择器变化
  onDayChange(e) {
    const dayIndex = e.detail.value
    const selectedDay = this.data.days[dayIndex]
    this.setData({
      selectedDay: selectedDay,
      selectedDayIndex: dayIndex
    })
  },

  // 根据月份更新日期数组
  updateDaysForMonth(month) {
    let daysCount
    
    // 根据月份设置日期数量
    switch(month) {
      case '2': // 2月
        daysCount = 28 // 简化处理，不考虑闰年
        break
      case '4':
      case '6':
      case '9':
      case '11': // 小月
        daysCount = 30
        break
      default: // 大月
        daysCount = 31
    }
    
    const days = []
    for (let i = 1; i <= daysCount; i++) {
      days.push(i.toString())
    }
    
    this.setData({
      days: days,
      selectedDay: '',
      selectedDayIndex: 0
    })
  },

  // 地区选择器变化
  onRegionChange(e) {
    const index = e.detail.value
    const selectedRegion = this.data.regionOptions[index]
    this.setData({
      selectedRegion: selectedRegion,
      selectedRegionIndex: index
    })
  },

  // 品种选择器变化
  onBreedChange(e) {
    const index = e.detail.value
    const selectedBreed = this.data.breedOptions[index]
    this.setData({
      selectedBreed: selectedBreed,
      selectedBreedIndex: index
    })
  },

  // 开始估价
  startEvaluation() {
    const { selectedMonth, selectedDay, selectedRegion, selectedBreed } = this.data
    
    if (!selectedMonth || !selectedDay || !selectedRegion || !selectedBreed) {
      wx.showToast({
        title: '请完成所有选择',
        icon: 'none',
        duration: 2000
      })
      return
    }

    // 显示加载中
    wx.showLoading({
      title: '估价中...',
      mask: true
    })

    // 调用真实的价格评估API
    api.evaluatePrice(selectedMonth, selectedDay, selectedRegion, selectedBreed)
      .then(result => {
        console.log('价格评估结果:', result);
        
        // 更新评估结果
        this.setData({
          evaluateResult: {
            estimatedPrice: result.estimatedPrice || '0.00',
            priceRange: result.priceRange || '0.00 - 0.00',
            confidence: result.confidence || '85%'
          },
          currentStep: 3
        });

        wx.hideLoading()
        
        wx.showToast({
          title: '估价完成',
          icon: 'success',
          duration: 1500
        })
      })
      .catch(error => {
        console.error('价格评估失败:', error);
        
        wx.hideLoading()
        
        wx.showToast({
          title: '估价失败: ' + (error.message || '未知错误'),
          icon: 'none',
          duration: 3000
        })
        
        // 可以选择保持当前步骤或者回到上一步
        // this.goBack();
      })
  },

  // 获取时间系数
  getTimeMultiplier(timeValue) {
    const multipliers = {
      'today': 1.0,
      'tomorrow': 0.98,
      'week': 0.95,
      'month': 0.90
    }
    return multipliers[timeValue] || 1.0
  },

  // 获取地区系数
  getRegionMultiplier(region) {
    const tier1Cities = ['北京', '上海', '广州', '深圳']
    const tier2Cities = ['天津', '江苏', '浙江', '山东']
    
    if (tier1Cities.includes(region)) return 1.15
    if (tier2Cities.includes(region)) return 1.05
    return 1.0
  },

  // 获取品种系数
  getBreedMultiplier(breed) {
    const premiumBreeds = ['绿壳', '双黄蛋', '黑鸡土蛋']
    const popularBreeds = ['罗曼粉', '伊莎粉', '海蓝褐']
    
    if (premiumBreeds.includes(breed)) return 1.20
    if (popularBreeds.includes(breed)) return 1.10
    return 1.0
  },

  // 计算价格区间
  calculatePriceRange(basePrice) {
    const min = (basePrice * 0.9).toFixed(2)
    const max = (basePrice * 1.1).toFixed(2)
    return `${min} - ${max}`
  },

  // 计算置信度
  calculateConfidence(month, day, region, breed) {
    let confidence = 80 // 基础置信度
    
    // 根据选择增加置信度
    // 如果选择了今日（当前月份和日期），增加置信度
    const now = new Date()
    const currentMonth = (now.getMonth() + 1).toString()
    const currentDate = now.getDate().toString()
    
    if (month === currentMonth && day === currentDate) {
      confidence += 10
    }
    
    // 根据地区增加置信度
    if (['北京', '上海', '广州', '深圳'].includes(region)) confidence += 5
    if (['罗曼粉', '伊莎粉', '海蓝褐'].includes(breed)) confidence += 5
    
    return Math.min(confidence, 95) + '%'
  },

  // 重新估价
  restartEvaluation() {
    this.setData({
      currentStep: 1,
      selectedMonth: '',
      selectedMonthIndex: 0,
      selectedDay: '',
      selectedDayIndex: 0,
      selectedRegion: '',
      selectedRegionIndex: 0,
      selectedBreed: '',
      selectedBreedIndex: 0,
      evaluateResult: {
        estimatedPrice: '0.00',
        priceRange: '0.00 - 0.00',
        confidence: '85%'
      }
    })
  },

  // 重置估价（与restartEvaluation相同）
  resetEvaluation() {
    this.restartEvaluation()
  },

  // 查看市场
  goToMarket() {
    // 实际应用中，这里会跳转到市场页面
    wx.showToast({
      title: '功能开发中...',
      icon: 'none',
      duration: 2000
    })
  },

  // 返回上一步
  goBack() {
    if (this.data.currentStep > 1) {
      this.setData({
        currentStep: this.data.currentStep - 1
      })
    }
  }
})