import { get } from '../../utils/request/index'
import { calcAge } from '../../utils/idCard/index'
import type { UserInfo } from '../../api/index'

type RangeType = 1 | 2 | 3

interface RangeTab {
    key: RangeType
    label: string
}

/** 页面展示用用户信息 */
interface PageUserInfo {
    userId: string
    realname: string
    sex: number
    sex_dictText: string
    age: number
    height: number
    avatar: string | null
    birthday: string
    relationType: number | string | null
    isSelf: boolean
}

/** GET /weighingScale/v3/getMeasureStatistics 返回结构 */
interface MeasureStatistics {
    maxWeight: number
    minWeight: number
    avgWeight: number
    weightChange: number
}

/** GET /weighingScale/v3/getMeasureHistoryPage records 单条 */
interface MeasureRecord {
    recordId: string
    examTime: string
    weight: number
    bmi: number
    fatRate: number
}

/** GET /weighingScale/v3/getMeasureHistoryPage 返回结构 */
interface MeasureHistoryPageResult {
    records: MeasureRecord[]
    total: number
}

/** 切换用户抽屉 select 事件 detail */
interface MemberSelectDetail {
    id: string
    name: string
    gender: '男' | '女'
    age: number
    height: number
    userId?: string
    sex?: number
    birthday?: string
    relationType?: number | string | null
    avatar?: string
}

/** 统计空态默认值 */
const EMPTY_STATS: MeasureStatistics = {
    maxWeight: 0,
    minWeight: 0,
    avgWeight: 0,
    weightChange: 0,
}

Page({
    data: {
        activeType: 1 as RangeType,
        rangeTabs: [
            { key: 1, label: '近7天' },
            { key: 2, label: '近30天' },
            { key: 3, label: '近3月' },
        ] as RangeTab[],

        userInfo: null as PageUserInfo | null,

        stats: EMPTY_STATS as MeasureStatistics,

        records: [] as MeasureRecord[],
        pageNo: 1,
        total: 0,
        hasMore: false,
        refresherTriggered: false,
        showSelectDrawer: false,
    },

    onLoad() {
        const raw = wx.getStorageSync('userInfo') as UserInfo | null
        if (!raw?.userId) return
        this.setData({ userInfo: this._buildSelfUserInfo(raw) })
        this.loadData()
    },

    /** 由缓存用户信息构建「本人」展示信息 */
    _buildSelfUserInfo(raw: UserInfo): PageUserInfo {
        return {
            userId: raw.userId,
            realname: raw.realname ?? '',
            sex: raw.sex,
            sex_dictText: raw.sex === 1 ? '男' : raw.sex === 2 ? '女' : '',
            age: calcAge(raw.birthday),
            height: raw.height ?? 0,
            avatar: raw.avatar ?? null,
            birthday: raw.birthday ?? '',
            relationType: raw.relationType ?? null,
            isSelf: true,
        }
    },

    /** 重置分页，并行拉统计 + 第一页列表 */
    loadData() {
        const userInfo = this.data.userInfo
        if (!userInfo?.userId) return
        this.setData({ pageNo: 1, records: [] })

        const statsReq = get<MeasureStatistics>('weighingScale/v3/getMeasureStatistics', {
            userId: userInfo.userId,
            type: this.data.activeType,
        }, { loading: false })

        const pageReq = get<MeasureHistoryPageResult>('weighingScale/v3/getMeasureHistoryPage', {
            userId: userInfo.userId,
            type: this.data.activeType,
            pageNo: 1,
            pageSize: 10,
        }, { loading: false })

        wx.showLoading({ title: '加载中...', mask: true })
        Promise.all([statsReq, pageReq])
            .then(([statsRes, pageRes]) => {
                const rawStats = statsRes.result
                const stats: MeasureStatistics = rawStats
                    ? {
                        maxWeight: rawStats.maxWeight ?? 0,
                        minWeight: rawStats.minWeight ?? 0,
                        avgWeight: rawStats.avgWeight ?? 0,
                        weightChange: rawStats.weightChange ?? 0,
                    }
                    : EMPTY_STATS

                const page = pageRes.result ?? {}
                const records: MeasureRecord[] = (page.records ?? []).map((r) => ({
                    recordId: r.recordId ?? '',
                    examTime: r.examTime ?? '',
                    weight: r.weight ?? 0,
                    bmi: r.bmi ?? 0,
                    fatRate: r.fatRate ?? 0,
                }))
                const total = page.total ?? 0

                this.setData({
                    stats,
                    records,
                    total,
                    hasMore: records.length < total,
                })
            })
            .catch(() => {
                this.setData({ stats: EMPTY_STATS, records: [], total: 0, hasMore: false })
            })
            .finally(() => {
                wx.hideLoading()
                this.setData({ refresherTriggered: false })
            })
    },

    /** scroll-view 触底，加载下一页 */
    onScrollToLower() {
        if (!this.data.hasMore) return
        const userInfo = this.data.userInfo
        if (!userInfo?.userId) return
        const nextPage = this.data.pageNo + 1

        wx.showLoading({ title: '加载中...', mask: true })
        get<MeasureHistoryPageResult>('weighingScale/v3/getMeasureHistoryPage', {
            userId: userInfo.userId,
            type: this.data.activeType,
            pageNo: nextPage,
            pageSize: 10,
        }, { loading: false })
            .then((res) => {
                const page = res.result ?? {}
                const newRecords: MeasureRecord[] = (page.records ?? []).map((r) => ({
                    recordId: r.recordId ?? '',
                    examTime: r.examTime ?? '',
                    weight: r.weight ?? 0,
                    bmi: r.bmi ?? 0,
                    fatRate: r.fatRate ?? 0,
                }))
                const allRecords = [...this.data.records, ...newRecords]
                this.setData({
                    records: allRecords,
                    pageNo: nextPage,
                    hasMore: allRecords.length < this.data.total,
                })
            })
            .catch(() => {
                wx.showToast({ title: '加载失败，请重试', icon: 'none' })
            })
            .finally(() => {
                wx.hideLoading()
            })
    },

    /** scroll-view 下拉刷新 */
    onRefresh() {
        this.setData({ refresherTriggered: true })
        this.loadData()
    },

    /** 切换时间范围 Tab */
    onTapRange(e: WechatMiniprogram.TouchEvent) {
        const key = Number(e.currentTarget.dataset.key) as RangeType
        if (key === this.data.activeType) return
        this.setData({ activeType: key })
        this.loadData()
    },

    /** 点击记录行，跳转测量报告 */
    onTapRecord(e: WechatMiniprogram.TouchEvent) {
        const recordId = e.currentTarget.dataset.recordId as string
        const userId = this.data.userInfo?.userId ?? ''
        wx.navigateTo({
            url: `/pages/detailedReport/detailedReport?recordId=${recordId}&userId=${userId}`,
        })
    },

    /** 打开切换用户抽屉 */
    onTapSwitchMember() {
        this.setData({ showSelectDrawer: true })
    },

    /** 抽屉关闭 */
    onCloseDrawer() {
        this.setData({ showSelectDrawer: false })
    },

    /** 选中用户后更新 userInfo 并重新请求数据 */
    onSelectMember(e: WechatMiniprogram.CustomEvent) {
        const m = e.detail as MemberSelectDetail
        if (!m.userId) {
            wx.showToast({ title: '用户信息异常', icon: 'none' })
            return
        }
        const storedUserId = (wx.getStorageSync('userInfo') as UserInfo | null)?.userId ?? ''
        const userInfo: PageUserInfo = {
            userId: m.userId,
            realname: m.name,
            sex: m.sex ?? (m.gender === '男' ? 1 : 2),
            sex_dictText: m.gender,
            age: m.age,
            height: m.height,
            avatar: m.avatar ?? null,
            birthday: m.birthday ?? '',
            relationType: m.relationType ?? null,
            isSelf: m.userId === storedUserId,
        }
        this.setData({ showSelectDrawer: false, userInfo })
        this.loadData()
    },
})