import type { InventoryRecord } from '@/api/db/inventory'
import type { PlanDelivery, PlanLoad, PlanStopProduct } from '@/api/pl'
import { formatDate } from '@/utils/format'
import { isPlInternalCustomerName } from '@/utils/pl-internal-customer'

const SITE_INSTRUCTION = '说明：请打开链接上传现场附件并填写备注。'

export type SiteSummaryStopBlock = {
  label: string
  customerName?: string
  businessType?: string
  address?: string
  productLines: string[]
}

export type SiteSummaryRecord = {
  productName?: string
  productText?: string
  batchNo?: string
  planNo?: string
  siteUrl?: string
  businessType?: string
  siteFeedbackRemark?: string
  siteFeedbackTime?: string
}

function formatSiteSummaryProductLine(record: SiteSummaryRecord) {
  return record.productText || record.productName || '—'
}

function isSegmentSiteRecord(record: SiteSummaryRecord) {
  return (record.businessType || '').includes('按段')
}

function formatStopProductLine(product: PlanStopProduct) {
  const name = (product.productName || '').trim() || '—'
  const qty = product.planQty
  const unit = (product.unit || '吨').trim()
  if (qty == null) return name
  return `${name} ${qty}${unit}`
}

function isSiteVisibleStop(customerName?: string | null, generateDibang?: number | null) {
  return isPlInternalCustomerName(customerName) && Number(generateDibang || 0) === 1
}

export function buildSiteStopBlocksFromPlan(
  plan?: {
    load?: PlanLoad | null
    deliveries?: PlanDelivery[] | null
  } | null
): SiteSummaryStopBlock[] {
  if (!plan) return []
  const blocks: SiteSummaryStopBlock[] = []
  const load = plan.load
  if (load && isSiteVisibleStop(load.customerName, load.generateDibang)) {
    blocks.push({
      label: '装货',
      customerName: load.customerName || undefined,
      businessType: load.dibangDirection || undefined,
      address: load.address || undefined,
      productLines: (load.products || []).map(formatStopProductLine).filter(Boolean)
    })
  }
  for (const delivery of plan.deliveries || []) {
    if (!isSiteVisibleStop(delivery.customerName, delivery.generateDibang)) continue
    const seq = delivery.seq != null ? Number(delivery.seq) : 0
    blocks.push({
      label: seq > 0 ? `送货 #${seq}` : '送货',
      customerName: delivery.customerName || undefined,
      businessType: delivery.dibangDirection || undefined,
      address: delivery.address || undefined,
      productLines: (delivery.products || []).map(formatStopProductLine).filter(Boolean)
    })
  }
  return blocks
}

function appendSiteRecordCardLines(
  lines: string[],
  record: SiteSummaryRecord,
  options: { showHeadline?: boolean }
) {
  const headline = (record.productName || '').trim()
  const productText = formatSiteSummaryProductLine(record)
  if (options.showHeadline && headline) {
    lines.push(headline)
  }
  if (record.businessType && record.businessType !== '—') {
    lines.push(`业务类型：${record.businessType}`)
  }
  if (record.siteFeedbackTime && record.siteFeedbackTime !== '—') {
    lines.push(`保存时间：${record.siteFeedbackTime}`)
  }
  if (record.batchNo) {
    lines.push(`出入库单号：${record.batchNo}`)
  }
  if (productText && productText !== '—' && productText !== headline) {
    lines.push(`产品：${productText}`)
  }
  if (record.siteFeedbackRemark && record.siteFeedbackRemark !== '—') {
    lines.push(`现场备注：${record.siteFeedbackRemark}`)
  }
  lines.push(`现场链接：${record.siteUrl}`)
}

function formatSiteDibangDirectionLabel(direction?: string | null) {
  const value = (direction || '').trim()
  if (!value || value === 'none') return ''
  if (value === 'outbound') return '出库'
  if (value === 'inbound') return '入库'
  return value
}

function appendStopBlockLines(lines: string[], stop: SiteSummaryStopBlock) {
  const bizLabel = formatSiteDibangDirectionLabel(stop.businessType)
  const biz = bizLabel ? `（${bizLabel}）` : ''
  lines.push(`【${stop.label} · ${stop.customerName || '—'}】${biz}`)
  if (stop.address) {
    lines.push(`地址：${stop.address}`)
  }
  if (stop.productLines.length) {
    stop.productLines.forEach((line) => lines.push(`产品：${line}`))
  } else {
    lines.push('产品：—')
  }
}

export function buildSiteSummaryFromInventoryLinks(options: {
  planNo?: string
  licensePlate?: string
  pickupTime?: string
  planDate?: string
  records: SiteSummaryRecord[]
  stopBlocks?: SiteSummaryStopBlock[]
}) {
  const lines = ['【运输现场】']
  const planNo = options.planNo || options.records[0]?.planNo
  if (planNo) lines.push(`计划号：${planNo}`)
  if (options.licensePlate) lines.push(`车牌：${options.licensePlate}`)
  const time = formatDate(options.pickupTime) || options.planDate
  if (time) lines.push(`时间：${time}`)

  const validRecords = options.records.filter((item) => item.siteUrl)
  if (!validRecords.length) {
    lines.push('现场链接：—')
    return lines.join('\n')
  }

  const stopBlocks = options.stopBlocks || []
  const useSegmentLayout =
    stopBlocks.length > 0 && validRecords.some((record) => isSegmentSiteRecord(record))

  if (useSegmentLayout) {
    lines.push('')
    stopBlocks.forEach((stop, index) => {
      if (index > 0) lines.push('')
      appendStopBlockLines(lines, stop)
    })
    lines.push('')
    const record = validRecords[0]
    lines.push(`现场链接：${record.siteUrl}`)
  } else if (validRecords.length === 1) {
    lines.push('')
    appendSiteRecordCardLines(lines, validRecords[0], { showHeadline: true })
  } else {
    lines.push('')
    validRecords.forEach((record, index) => {
      lines.push(`【${index + 1}】${formatSiteSummaryProductLine(record)}`)
      appendSiteRecordCardLines(lines, record, { showHeadline: false })
      if (index < validRecords.length - 1) lines.push('')
    })
  }

  lines.push('')
  lines.push(SITE_INSTRUCTION)
  return lines.join('\n')
}

export function buildSiteSummaryFromInventory(record: InventoryRecord, siteUrl: string) {
  const spec = record.specification?.trim()
  const product = spec ? `${record.product}（${spec}）` : record.product
  const lines = [
    '【出入库现场】',
    `出入库单号：${record.batchNo || '—'}`,
    `业务类型：${record.businessType}`,
    `日期：${record.date || '—'}`,
    `往来单位：${record.partnerCompany || '—'}`,
    `产品：${product}`,
    `数量（吨）：${record.quantity ?? '—'}`,
    `车牌：${record.vehicleNo || '—'}`
  ]
  if (record.planNo) lines.push(`计划号：${record.planNo}`)
  lines.push(`现场链接：${siteUrl}`)
  lines.push('')
  lines.push(SITE_INSTRUCTION)
  return lines.join('\n')
}