var app = getApp()

Page({
  data: {
    persons: [],
    currentPersonName: "",
    items: [],
    inputDate: "",
    values: {},
    existingRecords: []
  },

  onLoad: function () {
    var today = this.formatDate(new Date())
    var person = app.getCurrentPerson()
    this.setData({
      persons: app.globalData.persons,
      currentPersonName: person ? person.name : "",
      inputDate: today,
      items: app.getCurrentData().items
    })
    this.loadExisting(today)
  },

  onShow: function () {
    var person = app.getCurrentPerson()
    var items = app.getCurrentData().items
    this.setData({
      persons: app.globalData.persons,
      currentPersonName: person ? person.name : ""
    })
    if (items.length !== this.data.items.length ||
        items.some(function (v, i) { return v !== this.data.items[i] }, this)) {
      this.setData({ items: items })
    }
    this.loadExisting(this.data.inputDate)
  },

  loadExisting: function (date) {
    var data = app.getCurrentData()
    var records = data.records.filter(function (r) { return r.date === date })
    this.setData({ existingRecords: records })
  },

  onDateChange: function (e) {
    var date = e.detail.value
    this.setData({ inputDate: date, values: {} })
    this.loadExisting(date)
  },

  onValueInput: function (e) {
    var item = e.currentTarget.dataset.item
    var value = e.detail.value
    var update = {}
    update["values." + item] = value
    this.setData(update)
  },

  onSubmit: function () {
    var items = this.data.items
    var inputDate = this.data.inputDate
    var values = this.data.values
    var savedCount = 0
    var that = this
    var data = app.getCurrentData()

    items.forEach(function (item) {
      var raw = values[item]
      if (!raw || raw.trim() === "") return
      var v = parseFloat(raw)
      if (isNaN(v) || v <= 0) return

      var existing = data.records.find(function (r) { return r.item === item && r.date === inputDate })
      if (existing) {
        existing.value = v
      } else {
        app.addRecord({ item: item, date: inputDate, value: v })
      }
      savedCount++
    })

    if (savedCount === 0) {
      wx.showToast({ title: "请至少输入一项有效数值", icon: "none" })
      return
    }

    app.saveData()
    this.setData({ values: {} })
    this.loadExisting(inputDate)
    wx.showToast({ title: "已保存 " + savedCount + " 项", icon: "success", duration: 1500 })
  },

  goItems: function () {
    wx.navigateTo({ url: '/pages/items/items' })
  },

  formatDate: function (d) {
    var y = d.getFullYear()
    var m = String(d.getMonth() + 1)
    if (m.length === 1) m = "0" + m
    var day = String(d.getDate())
    if (day.length === 1) day = "0" + day
    return y + "-" + m + "-" + day
  }
})