import { get } from '../../utils/request/index'
import { lefuService } from '../../lefu/index'

/** GET /weighingScale/v3/select/addMembers/user 返回的单条结构 */
interface AddMemberApiItem {
  id: string
  realname: string
  sex_dictText: '男' | '女'
  birthday: string
  height: number
  weight: number
  idCard: string | null
  avatar: string | null
}

/** GET /weighingScale/v3/select/history/user 返回的单条结构 */
interface HistoryApiItem {
  userId: string
  realname: string
  sex: number
  height: number
  birthday: string
  avatar: string | null
  relationType: number | string | null
}

/** 抽屉内部成员项（含回填所需全量字段） */
interface ExistingMember {
  id: string
  name: string
  gender: '男' | '女'
  age: number
  height: number
  weight: number
  idCard: string
  avatar?: string
  selected?: boolean
  /** history 模式额外携带，供页面构建 userInfo */
  userId?: string
  sex?: number
  birthday?: string
  relationType?: number | string | null
}

/**
 * 选择已有成员抽屉组件
 * Properties: show(控制显示)
 * Events: close(关闭), select(选中成员,携带 ExistingMember)
 */
Component({
  properties: {
    /** 是否显示抽屉 */
    show: {
      type: Boolean,
      value: false
    },
    /** 数据来源模式：addMember=新增成员选择 / history=历史数据切换成员 */
    source: {
      type: String,
      value: 'addMember'
    }
  },

  data: {
    /** 控制 wx:if，DOM 是否存在 */
    innerShow: false,
    /** 控制 --visible 类，触发 CSS transition */
    animVisible: false,
    /** 成员列表（组件内部拉取） */
    members: [] as ExistingMember[]
  },

  observers: {
    /**
     * 监听外部 show 变化：
     * 打开时先拉数据再展示抽屉；关闭时移除动画类后移除 DOM
     */
    show(val: boolean) {
      if (val) {
        this._fetchMembers()
        this.setData({ innerShow: true })
        setTimeout(() => {
          this.setData({ animVisible: true })
        }, 20)
      } else {
        this.setData({ animVisible: false })
        setTimeout(() => {
          this.setData({ innerShow: false })
        }, 300)
      }
    }
  },

  methods: {
    /** 从生日字符串（YYYY-MM-DD）计算周岁 */
    _calcAge(birthday: string): number {
      if (!birthday) return 0
      const [year, month, day] = birthday.split('-').map(Number)
      if (!year || !month || !day) return 0
      const now = new Date()
      let age = now.getFullYear() - year
      if (now.getMonth() + 1 < month || (now.getMonth() + 1 === month && now.getDate() < day)) age -= 1
      return Math.max(0, age)
    },

    /** 调接口获取可选成员列表，根据 source 调不同接口 */
    _fetchMembers() {
      const userInfo = wx.getStorageSync('userInfo') as { userId?: string } | null
      const userId = userInfo?.userId ?? ''

      wx.showLoading({ title: '加载中...', mask: true })

      if (this.properties.source === 'history') {
        get<HistoryApiItem[]>('weighingScale/v3/select/history/user', { userId }, { loading: false })
          .then((res: any) => {
            const members: ExistingMember[] = (res.result ?? []).map((item: HistoryApiItem) => ({
              id: item.userId,
              name: item.realname,
              gender: item.sex === 1 ? '男' : '女',
              age: this._calcAge(item.birthday),
              height: item.height,
              weight: 0,
              idCard: '',
              avatar: item.avatar ?? '',
              userId: item.userId,
              sex: item.sex,
              birthday: item.birthday,
              relationType: item.relationType,
            }))
            this.setData({ members })
          })
          .finally(() => {
            wx.hideLoading()
          })
      } else {
        const sn = lefuService.deviceInfo?.serialNumber ?? ''
        get<AddMemberApiItem[]>('weighingScale/v3/select/addMembers/user', { userId, sn }, { loading: false })
          .then((res: any) => {
            const members: ExistingMember[] = (res.result ?? []).map((item: AddMemberApiItem) => ({
              id: item.id,
              name: item.realname,
              gender: item.sex_dictText,
              age: this._calcAge(item.birthday),
              height: item.height,
              weight: item.weight,
              idCard: item.idCard ?? '',
              avatar: item.avatar ?? '',
            }))
            this.setData({ members })
          })
          .finally(() => {
            wx.hideLoading()
          })
      }
    },

    /** 点击遮罩关闭 */
    onTapMask() {
      this.triggerEvent('close')
    },

    /** 点击关闭按钮 */
    onTapClose() {
      this.triggerEvent('close')
    },

    /**
     * 点击成员行，触发 select 事件
     * @param e 携带 data-member 的点击事件
     */
    onTapMember(e: WechatMiniprogram.TouchEvent) {
      const member = e.currentTarget.dataset.member as ExistingMember
      this.triggerEvent('select', member)
    }
  }
})