// diagnosis.js
const mockData = require('../../utils/mockData.js')

Page({
  data: {
    symptomText: '',
    commonSymptoms: ['头痛', '发烧', '咳嗽', '流鼻涕', '胃痛', '恶心', '皮肤瘙痒', '关节疼痛'],
    isDiagnosing: false,
    diagnosisResult: null,
    diagnosisHistory: []
  },

  onLoad() {
    console.log('智能诊断页面加载完成')
    // 加载诊断历史
    this.loadDiagnosisHistory()
  },

  // 输入症状
  onSymptomInput(e) {
    this.setData({
      symptomText: e.detail.value
    })
  },

  // 添加常见症状
  addSymptom(e) {
    const symptom = e.currentTarget.dataset.symptom
    const currentText = this.data.symptomText
    const newText = currentText ? `${currentText}、${symptom}` : symptom
    
    this.setData({
      symptomText: newText
    })
  },

  // 开始诊断
  startDiagnosis() {
    if (!this.data.symptomText.trim()) {
      wx.showToast({
        title: '请输入症状描述',
        icon: 'none'
      })
      return
    }

    this.setData({
      isDiagnosing: true
    })

    // 模拟AI诊断过程
    setTimeout(() => {
      const result = this.analyzeSymptoms(this.data.symptomText)
      this.setData({
        isDiagnosing: false,
        diagnosisResult: result
      })
      
      // 保存到历史记录
      this.saveToHistory(result)
    }, 2000)
  },

  // 分析症状（模拟AI诊断）
  analyzeSymptoms(symptomText) {
    const symptoms = symptomText.split(/[、,，。.\s]+/).filter(s => s.trim())
    
    // 简单的关键词匹配算法
    for (const [condition, data] of Object.entries(mockData.aiDiagnosis)) {
      const matchedSymptoms = data.symptoms.filter(symptom => 
        symptoms.some(s => s.includes(symptom) || symptom.includes(s))
      )
      
      if (matchedSymptoms.length >= Math.min(2, data.symptoms.length)) {
        return {
          condition: condition,
          diagnosis: data.diagnosis,
          symptoms: matchedSymptoms,
          suggestion: data.suggestion,
          recommendedMedicines: data.recommendedMedicines
        }
      }
    }

    // 如果没有匹配到特定疾病，返回通用建议
    return {
      condition: '一般不适',
      diagnosis: '症状需要进一步观察',
      symptoms: symptoms,
      suggestion: '建议多休息，注意饮食，如症状持续或加重请及时就医',
      recommendedMedicines: []
    }
  },

  // 保存诊断记录
  saveToHistory(result) {
    const historyItem = {
      id: Date.now(),
      date: new Date().toLocaleString(),
      symptoms: this.data.symptomText,
      diagnosis: result.diagnosis,
      condition: result.condition,
      suggestion: result.suggestion
    }

    const newHistory = [historyItem, ...this.data.diagnosisHistory].slice(0, 10) // 保留最近10条
    
    this.setData({
      diagnosisHistory: newHistory
    })

    // 保存到本地存储
    wx.setStorageSync('diagnosisHistory', newHistory)
  },

  // 加载诊断历史
  loadDiagnosisHistory() {
    const history = wx.getStorageSync('diagnosisHistory') || []
    this.setData({
      diagnosisHistory: history
    })
  },

  // 查看历史记录
  viewHistory(e) {
    const item = e.currentTarget.dataset.item
    this.setData({
      diagnosisResult: {
        diagnosis: item.diagnosis,
        symptoms: item.symptoms.split(/[、,，。.\s]+/).filter(s => s.trim()),
        suggestion: item.suggestion,
        recommendedMedicines: []
      }
    })
  },

  // 重置诊断
  resetDiagnosis() {
    this.setData({
      symptomText: '',
      diagnosisResult: null
    })
  },

  // 保存诊断记录
  saveDiagnosis() {
    if (this.data.diagnosisResult) {
      wx.showToast({
        title: '已保存到诊断历史',
        icon: 'success'
      })
    }
  },

  // 导航到药品购买页面
  navigateToMedicine(e) {
    const medicineName = e.currentTarget.dataset.medicine
    wx.showModal({
      title: '购买药品',
      content: `是否要购买"${medicineName}"？`,
      success: (res) => {
        if (res.confirm) {
          // 切换到下单页面并搜索该药品
          wx.switchTab({
            url: '/pages/order/order'
          })
          
          // 这里可以传递参数到下单页面进行自动搜索
          setTimeout(() => {
            const pages = getCurrentPages()
            const orderPage = pages.find(page => page.route === 'pages/order/order')
            if (orderPage) {
              orderPage.setData({
                currentTab: 1,
                medicineKeyword: medicineName
              })
            }
          }, 500)
        }
      }
    })
  }
})