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

/** GET /weighingScale/v3/getMeasureHistory result 结构 */
interface MeasureHistoryVO {
    recordId: string
    height: number
    weight: number
    weightChange: number
    bmi: number
    bmiType: string
    standardWeight: number
    fatRate: number
    fatValue: number
    basalMetabolism: number
    examTime: string
    sn: string
    userInfo: {
        realname: string
        sex: number
        [key: string]: any
    } | null
}

/** 页面渲染用测量记录 */
interface WeightRecord {
    /** 体重整数部分 */
    weight: number
    /** 体重小数部分，含小数点，如 ".20" */
    weightDecimal: string
    /** 测量时间 */
    date: string
    /** 与上次体重差值（负=减轻，正=增重） */
    diff: number
    /** 身高(cm) */
    height: number
    /** BMI 值 */
    bmi: number
    /** BMI 评级文本（来自接口 bmiType） */
    bmiLabel: string
    /** 标准体重(kg) */
    stdWeight: number
    /** 体脂率(%) */
    bodyFat: number
    /** 体脂肪量(kg) */
    bodyFatMass: number
    /** 基础代谢(kcal) */
    bmr: number
}

/** 空态默认值，避免页面展示 null */
const EMPTY_RECORD: WeightRecord = {
    weight: 0,
    weightDecimal: '',
    date: '',
    diff: 0,
    height: 0,
    bmi: 0,
    bmiLabel: '',
    stdWeight: 0,
    bodyFat: 0,
    bodyFatMass: 0,
    bmr: 0,
}

/** 将体重数字拆成整数 + 小数字符串 */
const splitWeight = (weight: number): { int: number; decimal: string } => {
    const str = weight.toFixed(2)
    const [intPart, decPart] = str.split('.')
    return { int: Number(intPart), decimal: `.${decPart}` }
}

/**
 * 测量报告页
 * URL 参数：recordId（记录 ID）、userId（用户 ID）
 */
Page({
    data: {
        record: EMPTY_RECORD as WeightRecord,
        /** 被查看用户的姓名（来自接口 userInfo.realname） */
        realname: '',
    },

    onLoad(options: Record<string, string>) {
        const { recordId, userId } = options
        if (!recordId || !userId) return

        get<MeasureHistoryVO>('weighingScale/v3/getMeasureHistory', {
            userId,
            recordId,
        }, { loading: true })
            .then((res: any) => {
                const d: MeasureHistoryVO = res.result
                if (!d) return

                const { int, decimal } = splitWeight(d.weight ?? 0)
                const record: WeightRecord = {
                    weight: int,
                    weightDecimal: decimal,
                    date: d.examTime ?? '',
                    diff: d.weightChange ?? 0,
                    height: d.height ?? 0,
                    bmi: d.bmi ?? 0,
                    bmiLabel: d.bmiType ?? '',
                    stdWeight: d.standardWeight ?? 0,
                    bodyFat: d.fatRate ?? 0,
                    bodyFatMass: d.fatValue ?? 0,
                    bmr: d.basalMetabolism ?? 0,
                }
                this.setData({
                    record,
                    realname: d.userInfo?.realname ?? '',
                })
            })
    },

    onShareAppMessage(): WechatMiniprogram.Page.ICustomShareContent {
        return {
            title: `${this.data.realname}的测量报告`,
            path: '/pages/measurementReport/measurementReport',
        }
    },
})