/**
 * 血糖 / 血压 阈值与异常判定工具
 *
 * 阈值规则（与 reception/index.vue 抽离前一致）：
 *   - 年龄 < 50：空腹血糖 ≥ 7、餐后/其他血糖 ≥ 9 视为偏高
 *   - 年龄 ≥ 50：空腹血糖 ≥ 8、餐后/其他血糖 ≥ 10 视为偏高
 *   - 收缩压 > 140 / 舒张压 > 90 视为偏高
 *
 * 任何字段缺失或非数值 → 视为「不偏高」（避免误报红色 ↑）。
 */

/**
 * 把任意值转成有限数字；空 / 非法 → null
 */
export function toNumeric(value: unknown): number | null {
    if (value === null || value === undefined || value === '') return null
    const num = Number(value as any)
    return Number.isFinite(num) ? num : null
}

/**
 * 根据年龄返回血糖阈值；年龄缺失/非法 → null（=不判定偏高）
 */
export function getBloodSugarThresholds(
    ageValue: unknown
): { fasting: number; postprandial: number } | null {
    const age = toNumeric(ageValue)
    if (age === null) return null
    if (age < 50) return { fasting: 7, postprandial: 9 }
    return { fasting: 8, postprandial: 10 }
}

export function isHighFastingBloodSugar(value: unknown, ageValue: unknown): boolean {
    const num = toNumeric(value)
    const thresholds = getBloodSugarThresholds(ageValue)
    return num !== null && thresholds !== null && num >= thresholds.fasting
}

export function isHighPostprandialBloodSugar(value: unknown, ageValue: unknown): boolean {
    const num = toNumeric(value)
    const thresholds = getBloodSugarThresholds(ageValue)
    return num !== null && thresholds !== null && num >= thresholds.postprandial
}

/**
 * 「其他血糖」按餐后阈值判定（与 reception 原实现一致）
 */
export function isHighOtherBloodSugar(value: unknown, ageValue: unknown): boolean {
    const num = toNumeric(value)
    const thresholds = getBloodSugarThresholds(ageValue)
    return num !== null && thresholds !== null && num >= thresholds.postprandial
}

export function isHighSystolicPressure(value: unknown): boolean {
    const num = toNumeric(value)
    return num !== null && num > 140
}

export function isHighDiastolicPressure(value: unknown): boolean {
    const num = toNumeric(value)
    return num !== null && num > 90
}

/**
 * 一行血糖血压记录是否有任一压偏高
 */
export function isHighBloodPressure(row: {
    systolic_pressure?: unknown
    diastolic_pressure?: unknown
} | null | undefined): boolean {
    if (!row) return false
    return isHighSystolicPressure(row.systolic_pressure) || isHighDiastolicPressure(row.diastolic_pressure)
}

/**
 * 把一行记录的血压两值格式化为 `xxx / yyy`，缺值 → `—`
 */
export function formatBp(row: {
    systolic_pressure?: unknown
    diastolic_pressure?: unknown
} | null | undefined): string {
    const sys = row?.systolic_pressure
    const dia = row?.diastolic_pressure
    if (sys == null && dia == null) return '—'
    return `${sys ?? '—'} / ${dia ?? '—'}`
}