/**
 * 司机运输计划单「复制发群」纯文本（不含附件）
 * 规格：docs/superpowers/specs/2026-10-13-mini-pl-driver-plan-copy-product-lines-design.md
 * （头信息/区块/边界继承 2026-10-12 enrich 设计）
 */

const DASH = '—'
const FIELD_GAP = '  '

function stopTypeOf(stop) {
  return String(stop?.stopType || stop?.stop_type || '').trim()
}

function customerNameOf(stop) {
  const name = String(stop?.customerName || stop?.customer_name || '').trim()
  return name || DASH
}

function textOrDash(value) {
  const s = String(value ?? '').trim()
  return s || DASH
}

function formatQtyWithUnit(raw, unit) {
  if (raw == null || raw === '') return DASH
  const qty = String(raw).trim()
  if (!qty) return DASH
  const u = String(unit || '').trim()
  return u ? `${qty} ${u}` : qty
}

function planQtyOf(product) {
  if (product?.planQty != null && product.planQty !== '') return product.planQty
  if (product?.plan_qty != null && product.plan_qty !== '') return product.plan_qty
  if (product?.quantity != null && product.quantity !== '') return product.quantity
  return null
}

function actualQtyOf(product) {
  if (product?.actualQty != null && product.actualQty !== '') return product.actualQty
  if (product?.actual_qty != null && product.actual_qty !== '') return product.actual_qty
  return null
}

/** 产品三行：产品信息 / 计划数量 / 实际数量（组间不空行） */
function formatProductLines(product) {
  const name = textOrDash(product?.productName ?? product?.product_name)
  const model = textOrDash(product?.model)
  const pack = textOrDash(product?.packageSpec ?? product?.package_spec)
  const unit = product?.unit
  const planPart = formatQtyWithUnit(planQtyOf(product), unit)
  const actualPart = formatQtyWithUnit(actualQtyOf(product), unit)
  return [
    `- 产品信息：${name}${FIELD_GAP}${model}${FIELD_GAP}${pack}`,
    `- 计划数量：${planPart}`,
    `- 实际数量：${actualPart}`
  ]
}

/**
 * 追加「送货信息：」或「装货信息：」区块。
 * 无站点 → 标题下单独一行 —
 * 有站点无产品 → 客户名：下一行 - —
 */
function appendInfoSection(lines, title, stops) {
  lines.push(title)
  if (!stops.length) {
    lines.push(DASH)
    return
  }
  stops.forEach((stop) => {
    lines.push(`${customerNameOf(stop)}：`)
    const products = Array.isArray(stop?.products) ? stop.products : []
    if (!products.length) {
      lines.push(`- ${DASH}`)
      return
    }
    products.forEach((product) => {
      formatProductLines(product).forEach((line) => lines.push(line))
    })
  })
}

/**
 * @param {object} page driverPlanApi.get 详情（可含 copySeqNo）
 * @returns {string}
 */
export function buildDriverPlanCopyText(page = {}) {
  const stops = Array.isArray(page?.stops) ? page.stops : []
  const loadStops = stops.filter((s) => stopTypeOf(s) === 'load')
  const deliveryStops = stops.filter((s) => stopTypeOf(s) === 'delivery')

  const rawSeq = page?.copySeqNo ?? page?.copy_seq_no
  const seqText = rawSeq != null && rawSeq !== '' ? String(rawSeq) : DASH

  const lines = [
    `序号：${seqText}`,
    `计划编号：${textOrDash(page?.planNo ?? page?.plan_no)}`,
    `车辆：${textOrDash(page?.licensePlate ?? page?.license_plate)}`
  ]

  appendInfoSection(lines, '送货信息：', deliveryStops)
  appendInfoSection(lines, '装货信息：', loadStops)

  return lines.join('\n')
}

/** 复制到剪贴板；成功返回 true */
export function copyDriverPlanToClipboard(page) {
  const text = buildDriverPlanCopyText(page)
  if (!text) {
    uni.showToast({ title: '暂无可复制内容', icon: 'none' })
    return Promise.resolve(false)
  }
  return new Promise((resolve) => {
    uni.setClipboardData({
      data: text,
      success: () => {
        uni.showToast({ title: '已复制', icon: 'success' })
        resolve(true)
      },
      fail: () => {
        uni.showToast({ title: '复制失败', icon: 'none' })
        resolve(false)
      }
    })
  })
}