/**
 * 价格套餐 · 纯函数与数据工厂
 *
 * 只做数据转换，不依赖组件实例 / 字典 / 接口，
 * create.vue、detail.vue 及 set/components 下的组件共用。
 */
import { parseTime } from '@/utils/ruoyi'

/** 计价类型枚举 */
export const SET_TYPE = {
  FIXED: 'FIXED',
  DISCOUNT: 'DISCOUNT'
}

/** 套餐状态枚举：D 草稿 / A 审核中 / E 生效中 / R 驳回 / S 已停用 */
export const SET_STATUS = {
  DRAFT: 'D',
  AUDIT: 'A',
  EFFECTIVE: 'E',
  REJECT: 'R',
  STOPPED: 'S'
}

const STATUS_LABEL = {
  D: '草稿',
  A: '审核中',
  E: '生效中',
  R: '驳回',
  S: '已停用'
}

const STATUS_TAG = {
  D: 'warning',
  A: 'primary',
  E: 'success',
  R: 'danger',
  S: 'info'
}

/** 默认取值方式 */
export const DEFAULT_ROUND_MODE = 'HALF_UP'

/** version status: 0 draft / 3 pending / 1 active / 2 expired */
export const VER_STATUS = {
  DRAFT: '0',
  PENDING: '3',
  EFFECT: '1',
  EXPIRED: '2'
}

export function versionStatusLabel(status) {
  const map = {
    '0': '草稿',
    '3': '待生效',
    '1': '生效',
    '2': '失效'
  }
  return map[status] || status || '-'
}

export function versionStatusTag(status) {
  const map = { '0': 'warning', '3': 'primary', '1': 'success', '2': 'info' }
  return map[status] || 'info'
}

/** True draft only (not pending) */
export function isDraftVersion(row) {
  return !!row && String(row.status) === VER_STATUS.DRAFT
}

export function isPendingVersion(row) {
  return !!row && String(row.status) === VER_STATUS.PENDING
}

/** Draft or pending: may continue editing price details */
export function isPriceEditableVersion(row) {
  return isDraftVersion(row) || isPendingVersion(row)
}

export function nextVersionNo(versions) {
  const seqs = (versions || []).map(v => Number(v.versionSeq) || 0)
  const max = seqs.length ? Math.max.apply(null, seqs) : 0
  return 'V' + (max + 1)
}

/** 状态文案（已过期优先） */
export function setStatusLabel(set) {
  if (set && set.expired) return '已过期'
  return STATUS_LABEL[set && set.status] || (set && set.status) || '-'
}

/** 状态标签色（已过期优先） */
export function setStatusTagType(set) {
  if (set && set.expired) return 'danger'
  return STATUS_TAG[set && set.status] || 'info'
}

/** 明细 / 客户是否可维护：草稿、驳回、生效中 */
export function isChildEditable(status) {
  return [SET_STATUS.DRAFT, SET_STATUS.REJECT, SET_STATUS.EFFECTIVE].includes(status)
}

/** 日期显示 yyyy-MM-dd */
export function formatDate(val) {
  return val ? parseTime(val, '{y}-{m}-{d}') : ''
}

/** 有效期区间文案，结束为空表示长期 */
export function formatDateRange(begin, end) {
  return `${formatDate(begin) || '-'} ~ ${end ? formatDate(end) : '长期'}`
}

/** 是否固定价模式 */
export function isFixedType(setType) {
  return setType === SET_TYPE.FIXED
}

/** 是否折扣模式 */
export function isDiscountType(setType) {
  return setType === SET_TYPE.DISCOUNT
}

/** 计价类型展示文案 */
export function setTypeLabel(setType) {
  return isFixedType(setType) ? 'FIXED 固定价' : 'DISCOUNT 折扣'
}

/**
 * 数字转字符串，抹掉浮点误差尾巴
 * @param {number|string} v
 * @returns {string} 0.1 + 0.2 -> '0.3'
 */
export function trimNum(v) {
  if (v == null || v === '') return ''
  const n = Number(v)
  if (Number.isNaN(n)) return String(v)
  return String(parseFloat(n.toFixed(6)))
}

/** Weight label: left-open right-closed, e.g. 0.3<W\u22641 */
export function formatWeightLabel(min, max) {
  return `${trimNum(min)}<W≤${trimNum(max)}`
}

/** 国家唯一键：优先国家三字码，其次国家名称 */
export function countryKeyOf(row) {
  if (!row) return ''
  if (row.countryCode) return row.countryCode
  if (row.countryName) return 'N:' + row.countryName
  return ''
}

/** 明细行的国家 与 产品国家配置行 是否指向同一国家 */
export function matchCountry(detail, item) {
  if (detail.countryCode && item.countryCode) {
    return detail.countryCode === item.countryCode
  }
  return !!detail.countryName && item.countryName === detail.countryName
}

/** detail row zone vs product-country row */
export function matchZone(detail, item) {
  const detailHas = !!(detail.zoneCode || detail.zoneId)
  const itemHas = !!(item.zoneCode || item.zoneId)
  if (!detailHas && !itemHas) return true
  if (detailHas !== itemHas) return false
  if (detail.zoneId != null && item.zoneId != null) return Number(detail.zoneId) === Number(item.zoneId)
  if (detail.zoneCode && item.zoneCode) return String(detail.zoneCode) === String(item.zoneCode)
  return false
}

/** country + zone match */
export function matchCountryZone(detail, item) {
  return matchCountry(detail, item) && matchZone(detail, item)
}

/**
 * 国家下拉选项（按产品的国家配置去重）
 * @param {Array} rows bms_product_country 行
 * @returns {Array<{key, code, name, label}>}
 */
export function buildCountryOptions(rows) {
  const map = new Map()
  ;(rows || []).forEach(item => {
    const key = countryKeyOf(item)
    if (!key || map.has(key)) return
    map.set(key, {
      key,
      code: item.countryCode || undefined,
      name: item.countryName,
      label: item.countryCode ? `${item.countryName} ${item.countryCode}` : item.countryName
    })
  })
  return [...map.values()]
}

/**
 * 重量段下拉选项（按已选国家过滤去重）
 * @param {Array} rows bms_product_country 行
 * @param {Object} row 当前明细行（含国家）
 * @returns {Array<{value, label, detailId, freightPrice, registrationFee}>}
 */
/**
 * Zone options for selected country (from product-country rows).
 * @returns {Array<{key, zoneId, zoneCode, zoneName, label}>}
 */
export function buildZoneOptions(rows, row) {
  const map = new Map()
  ;(rows || []).filter(item => matchCountry(row, item)).forEach(item => {
    if (!item.zoneCode && item.zoneId == null) return
    const key = item.zoneCode || String(item.zoneId)
    if (map.has(key)) return
    map.set(key, {
      key,
      zoneId: item.zoneId,
      zoneCode: item.zoneCode || undefined,
      zoneName: item.zoneName || undefined,
      label: item.zoneName || item.zoneCode || key
    })
  })
  return [...map.values()]
}

/** Whether selected country has any zone rows */
export function countryHasZones(rows, row) {
  return buildZoneOptions(rows, row).length > 0
}

export function buildWeightOptions(rows, row) {
  const list = rows || []
  if (countryHasZones(list, row) && !(row && (row.zoneCode || row.zoneId))) {
    return []
  }
  const map = new Map()
  list.filter(item => matchCountryZone(row, item)).forEach(item => {
    if (item.weightMin == null && item.weightMax == null) return
    const value = formatWeightLabel(item.weightMin, item.weightMax)
    if (map.has(value)) return
    map.set(value, {
      value,
      label: value,
      detailId: item.detailId,
      zoneId: item.zoneId,
      zoneCode: item.zoneCode,
      zoneName: item.zoneName,
      freightPrice: item.freightPrice,
      registrationFee: item.registrationFee,
      weightMin: item.weightMin,
      weightMax: item.weightMax,
      effectiveDate: item.effectiveDate,
      expireDate: item.expireDate
    })
  })
  return [...map.values()]
}

/** 附加费金额展示：RATE 转百分比，其余带币种 */
export function formatChargeValue(row) {
  if (!row || row.chargeValue == null) return '-'
  const v = Number(row.chargeValue)
  if (row.chargeType === 'RATE') return (v * 100).toFixed(2) + '%'
  return v + ' ' + (row.currency || 'CNY')
}

/** 附加费作用范围文案 */
export function surchargeScopeLabel(s) {
  // 主表（prc_surcharge）数据：country_code 有值 = 该国专属（计费归属），空 = 全部国家
  if (s.detailId == null && s.psdId == null) {
    return s.countryCode ? `国家 ${s.countryCode}` : '全部国家'
  }
  const w = s.weightMin != null && s.weightMax != null ? `${s.weightMin}-${s.weightMax}kg` : '-'
  return `${s.countryName || '-'} · ${w}`
}

/**
 * 产品关联附加费（prc_surcharge_rel）是否作用于该明细行
 * 与后端 snapshotVersionSurcharges 的过滤口径保持一致：
 * 国家三字码一致 + 产品级(detailId 空)直接命中，明细级需 productCountryId 相同
 */
export function surchargeAppliesToRow(rel, row) {
  if (!rel || !row) return false
  if (rel.countryCode && row.countryCode
    && String(rel.countryCode).toUpperCase() !== String(row.countryCode).toUpperCase()) {
    return false
  }
  if (rel.detailId == null) return true
  return row.productCountryId != null && Number(rel.detailId) === Number(row.productCountryId)
}

/** 附加费标签文案 */
export function surchargeTagLabel(s) {
  return `${s.scName} ${formatChargeValue(s)}`
}

/** 新增一条空明细行 */
export function createEmptyDetailRow() {
  return {
    productCode: undefined,
    productName: undefined,
    countryCode: undefined,
    countryName: undefined,
    _countryKey: undefined,
    zoneId: undefined,
    zoneCode: undefined,
    zoneName: undefined,
    weightLabel: undefined,
    weightMin: undefined,
    weightMax: undefined,
    productCountryId: undefined,
    fvValue: undefined,
    fvRegistrationFee: undefined,
    /** product default freight when copied from bms_product_country */
    _baseFreight: undefined,
    /** product default registration fee */
    _baseReg: undefined,
    discountValue: undefined,
    roundMode: DEFAULT_ROUND_MODE,
    effectiveDate: undefined,
    expireDate: undefined
  }
}

/** 明细行 -> 可编辑行（补齐取值方式与国家键） */
export function toEditableDetailRow(row) {
  return {
    ...row,
    roundMode: row.roundMode || DEFAULT_ROUND_MODE,
    _countryKey: countryKeyOf(row),
    _baseFreight: row._baseFreight != null ? row._baseFreight : undefined,
    _baseReg: row._baseReg != null ? row._baseReg : undefined
  }
}

/** FIXED row changed vs product default */
export function isDetailPriceChanged(row) {
  if (!row) return false
  if (row._baseFreight != null && Number(row.fvValue) !== Number(row._baseFreight)) return true
  if (row._baseReg != null && Number(row.fvRegistrationFee) !== Number(row._baseReg)) return true
  return false
}

/** 新增一条空客户绑定行 */
export function createEmptyCustomerRow({ effectiveDate, expireDate, seq = 1 } = {}) {
  return {
    customerId: undefined,
    customerCode: undefined,
    customerName: '',
    bindPriority: seq,
    prBegindate: effectiveDate,
    prEnddate: expireDate
  }
}

/** 新建套餐的基本信息默认值 */
export function createEmptyBasicInfo() {
  return {
    priceSetName: '',
    setType: SET_TYPE.FIXED,
    defaultDiscount: 88,
    effectiveDate: undefined,
    expireDate: undefined,
    priceSetNote: ''
  }
}

/** 明细行 -> 提交后端的 payload */
export function toDetailPayload(d) {
  return {
    psdId: d.psdId || undefined,
    psvId: d.psvId || undefined,
    priceSetId: d.priceSetId || undefined,
    productCode: d.productCode,
    productName: d.productName,
    countryCode: d.countryCode || undefined,
    countryName: d.countryName || undefined,
    zoneId: d.zoneId || undefined,
    zoneCode: d.zoneCode || undefined,
    zoneName: d.zoneName || undefined,
    weightLabel: d.weightLabel || undefined,
    weightMin: d.weightMin,
    weightMax: d.weightMax,
    productCountryId: d.productCountryId || undefined,
    fvValue: d.fvValue,
    fvRegistrationFee: d.fvRegistrationFee,
    discountValue: d.discountValue,
    roundMode: d.roundMode || DEFAULT_ROUND_MODE,
    effectiveDate: d.effectiveDate || undefined,
    expireDate: d.expireDate || undefined,
    /** 勾选保存的附加费：带数组即按勾选落快照，空数组=一条都不选 */
    surcharges: Array.isArray(d.surcharges) ? d.surcharges.map(s => ({ scId: s.scId })) : undefined
  }
}

/** 客户绑定行 -> 提交后端的 payload */
export function toCustomerPayload(c) {
  return { ...c }
}