import { App, Alert, Button, Card, Empty, Input, Modal, Space, Tag, Typography } from 'antd'
import { useQuery } from '@tanstack/react-query'
import { useEffect, useMemo, useState } from 'react'

import PercentTable from '@/components/common/PercentTable'
import {
  fetchAdminConsignmentMatchCandidates,
  matchAdminConsignmentWorkOrder,
} from '@/services/admin/consignment'
import type { ConsignmentMatchCandidate } from '@/types/consignment'
import {
  computeConsignmentMatchScore,
  describeConsignmentMatch,
  resolveMatchCoverage,
} from '@/utils/consignment-match-coverage'
import { resolveConsignmentPriorityTagColor } from '@/utils/consignment-match-priority'

function money(fen: number) {
  return `￥${((Number(fen || 0) || 0) / 100).toFixed(2)}`
}

const EMPTY_INVENTORY_IDS: number[] = []

/** 搜索框命中范围：单号 / 物品 / 规格 / 打手 / 匹配说明。 */
function buildCandidateHaystack(item: ConsignmentMatchCandidate): string {
  return [
    item.consignmentNo || '',
    item.inventoryNo,
    item.itemName,
    item.specText || '',
    Object.values(item.specValues || {}).join(' '),
    item.workerName || '',
    (item.matchReasons || []).join(' '),
    describeConsignmentMatch(item),
  ]
    .join(' ')
    .toLowerCase()
}

function sameIdList(left: number[], right: number[]): boolean {
  if (left.length !== right.length) return false
  return left.every((value, index) => value === right[index])
}

function resolveScoreTag(item: ConsignmentMatchCandidate) {
  const type = item.matchType || 'exact'
  const score = computeConsignmentMatchScore(item)
  if (type === 'conflict') return { color: 'default', label: '不匹配' }
  if (type === 'exact') return { color: 'green', label: '精确' }
  if (score >= 90) return { color: 'blue', label: '非精确' }
  if (score >= 70) return { color: 'orange', label: '非精确' }
  return { color: 'gold', label: '需核对' }
}

export default function ConsignmentWorkOrderMatchModal({
  open,
  workOrderId,
  initialInventoryIds,
  onClose,
  onMatched,
}: {
  open: boolean
  workOrderId: number | null
  /** 外部带入的预选库存（例如待匹配看板点「选择」），允许是非精确项 */
  initialInventoryIds?: number[]
  onClose: () => void
  onMatched?: () => void
}) {
  const { message } = App.useApp()
  const [selectedIds, setSelectedIds] = useState<number[]>([])
  const [keyword, setKeyword] = useState('')
  const [submitting, setSubmitting] = useState(false)
  const [nonExactReason, setNonExactReason] = useState('')
  const presetInventoryKey = (initialInventoryIds || EMPTY_INVENTORY_IDS).join(',')

  const candidatesQuery = useQuery({
    queryKey: ['admin-consignment-match-candidates', workOrderId],
    queryFn: () => fetchAdminConsignmentMatchCandidates(Number(workOrderId)),
    enabled: open && Boolean(workOrderId),
    // 409 等业务拒绝对话框要直接把原因展示出来，不能重试后再被误判成“没有库存”。
    retry: false,
    refetchOnWindowFocus: false,
  })
  const data = candidatesQuery.data?.data
  const options = useMemo(() => data?.options || [], [data?.options])
  const totalQuantity = Math.max(1, Number(data?.totalQuantity || 1))
  const activeQuantity = Math.max(0, Number(data?.activeQuantity || 0))
  const sharingEnabled = Boolean(data?.sharingEnabled)
  // 状态不允许时接口只读返回候选：仍可搜索/核对库存，但禁止提交。
  const matchable = data?.matchable !== false
  const blockedReason = data?.blockedReason || '当前工单状态不允许匹配寄卖库存'
  const remainingNeeded = sharingEnabled
    ? Math.max(0, totalQuantity - activeQuantity)
    : totalQuantity

  const normalizedKeyword = keyword.trim().toLowerCase()
  // 后端已按「枪型 → 钻石 → 璀璨」排好序；这里只做关键词过滤，必须保持原顺序。
  const visibleOptions = useMemo(() => {
    return normalizedKeyword
      ? options.filter((item) => buildCandidateHaystack(item).includes(normalizedKeyword))
      : options
  }, [normalizedKeyword, options])

  const selectedOptions = useMemo(
    () => options.filter((item) => selectedIds.includes(item.inventoryId)),
    [options, selectedIds],
  )

  const coverage = useMemo(
    () =>
      resolveMatchCoverage({
        sharingEnabled,
        totalQuantity,
        activeQuantity,
        selected: selectedOptions.map((item) => ({
          inventoryId: item.inventoryId,
          remainingQuantity: item.remainingQuantity,
        })),
      }),
    [activeQuantity, selectedOptions, sharingEnabled, totalQuantity],
  )

  const counts = useMemo(() => {
    let exact = 0
    let partial = 0
    let conflict = 0
    for (const item of options) {
      const type = item.matchType || 'exact'
      if (type === 'exact') exact += 1
      else if (type === 'conflict') conflict += 1
      else partial += 1
    }
    return { exact, partial, conflict }
  }, [options])

  useEffect(() => {
    if (!open) {
      setSelectedIds((prev) => (prev.length ? [] : prev))
      setKeyword('')
      setNonExactReason('')
      return
    }
    if (options.length === 0 || remainingNeeded <= 0) {
      setSelectedIds((prev) => (prev.length ? [] : prev))
      return
    }

    // 外部预选优先：待匹配看板点「选择」时直接勾中对应库存（可能是非精确项）。
    if (presetInventoryKey) {
      const presetIds = presetInventoryKey
        .split(',')
        .map((value) => Number(value))
        .filter((id) => Number.isInteger(id) && id > 0)
      setSelectedIds((prev) => (sameIdList(prev, presetIds) ? prev : presetIds))
      return
    }

    // 默认只选精确库存；整单必须一条满足总量，拼单按剩余份数累加到一次拼满。
    const exactOptions = options.filter(
      (item) => (item.matchType || 'exact') === 'exact' && Number(item.remainingQuantity || 0) > 0,
    )
    if (!sharingEnabled) {
      const chosen = exactOptions.find(
        (item) => Number(item.remainingQuantity || 0) >= totalQuantity,
      )
      const nextIds = chosen ? [chosen.inventoryId] : []
      setSelectedIds((prev) => (sameIdList(prev, nextIds) ? prev : nextIds))
      return
    }

    let covered = 0
    const ids: number[] = []
    for (const item of exactOptions) {
      if (covered >= remainingNeeded) break
      ids.push(item.inventoryId)
      covered += Math.max(0, Number(item.remainingQuantity || 0))
    }
    setSelectedIds((prev) => (sameIdList(prev, ids) ? prev : ids))
  }, [open, options, presetInventoryKey, remainingNeeded, sharingEnabled, totalQuantity])

  const nonExactSelected = useMemo(
    () =>
      selectedOptions.some((item) => {
        const type = item.matchType || 'exact'
        return type !== 'exact'
      }),
    [selectedOptions],
  )

  const canSubmit =
    matchable &&
    selectedIds.length > 0 &&
    coverage.sufficient &&
    (!nonExactSelected || nonExactReason.trim().length > 0)

  const infoMessage =
    remainingNeeded <= 0
      ? '该工单已匹配满，无需再次匹配。'
      : sharingEnabled
        ? `该工单拼单 ${totalQuantity} 份，已匹配 ${activeQuantity} 份，本次还需 ${remainingNeeded} 份；必须一次选满才能提交。`
        : `该工单为整单匹配，请选择 1 条可一次满足 ${totalQuantity} 件的库存。`

  return (
    <Modal
      title="手动匹配寄卖"
      open={open}
      onCancel={onClose}
      width="min(1180px, 96vw)"
      destroyOnHidden
      footer={
        <Space>
          <Button onClick={onClose}>取消</Button>
          <Button
            type="primary"
            loading={submitting}
            disabled={!canSubmit}
            onClick={async () => {
              if (!workOrderId) return
              setSubmitting(true)
              try {
                const result = await matchAdminConsignmentWorkOrder({
                  workOrderId,
                  inventoryIds: selectedIds,
                  allowNonExact: nonExactSelected,
                  reason: nonExactSelected ? nonExactReason.trim() : undefined,
                })
                message.success(
                  result.data?.matched
                    ? `已匹配 ${result.data.matchedCount || selectedIds.length} 条寄卖库存`
                    : '未匹配到可用库存',
                )
                onMatched?.()
                onClose()
              } catch (error) {
                message.error(error instanceof Error ? error.message : '匹配失败')
              } finally {
                setSubmitting(false)
              }
            }}
          >
            确认匹配
          </Button>
        </Space>
      }
    >
      {candidatesQuery.isLoading ? <Card loading /> : null}
      {candidatesQuery.isError ? (
        <Alert
          type="error"
          showIcon
          message="读取可匹配寄卖库存失败"
          description={
            candidatesQuery.error instanceof Error ? candidatesQuery.error.message : '请稍后重试'
          }
          action={
            <Button size="small" onClick={() => void candidatesQuery.refetch()}>
              重试
            </Button>
          }
        />
      ) : null}
      {!candidatesQuery.isLoading && !candidatesQuery.isError ? (
        <Space direction="vertical" size={8} style={{ width: '100%', marginBottom: 12 }}>
          <Space wrap size={8}>
            <Input.Search
              allowClear
              placeholder="搜索寄卖单号 / 库存号 / 物品 / 规格 / 打手"
              style={{ width: 320 }}
              value={keyword}
              onChange={(event) => setKeyword(event.target.value)}
            />
            <Typography.Text type="secondary">
              显示 {visibleOptions.length} / 候选 {options.length} 条
            </Typography.Text>
          </Space>
          <Typography.Text type="secondary" style={{ fontSize: 12 }}>
            候选范围：本工单分类及其上级分类下的全部在库寄卖单（跨枪型会标为不匹配，需填原因才能强制匹配）。
          </Typography.Text>
        </Space>
      ) : null}
      {!candidatesQuery.isLoading && !candidatesQuery.isError && options.length === 0 ? (
        <Empty description="没有同配置的在库寄卖库存" />
      ) : null}
      {!candidatesQuery.isLoading &&
      !candidatesQuery.isError &&
      options.length > 0 &&
      visibleOptions.length === 0 ? (
        <Empty
          description={
            keyword.trim()
              ? '没有匹配该关键词的库存，换个寄卖单号/库存号/物品/打手试试'
              : '没有可展示的库存'
          }
        />
      ) : null}
      {!candidatesQuery.isError && visibleOptions.length > 0 ? (
        <Space direction="vertical" size={12} style={{ width: '100%' }}>
          {!matchable ? (
            <Alert
              type="warning"
              showIcon
              message={blockedReason}
              description="当前仍可搜索和核对库存；补充资料/重新发布到待分配或待抢单后才能提交匹配。"
            />
          ) : null}
          {data?.matchingMode === 'off' ? (
            <Alert
              type="warning"
              showIcon
              message="该分类已关闭自动匹配"
              description="关闭自动匹配不会禁止人工操作：本次手动匹配仍会直接占用寄卖现货并写入匹配留痕，请确认库存与订单规格后再提交。"
            />
          ) : null}
          <Alert
            type={remainingNeeded <= 0 ? 'warning' : 'info'}
            showIcon
            message={infoMessage}
            description="默认按 枪型 → 钻石 → 璀璨 排序：完美匹配在前，同钻高璀/高钻同璀/高钻高璀次之，低配靠后；非精确/冲突必须填写人工原因；拼单必须一次拼满，失败不会占用任何库存。"
          />
          <Space wrap size={8}>
            <Tag color="blue">
              {sharingEnabled ? `待匹配 ${remainingNeeded} 份` : `整单 ${totalQuantity} 件`}
            </Tag>
            {sharingEnabled ? <Tag>已匹配 {activeQuantity} 份</Tag> : null}
            <Tag color="green">精确 {counts.exact}</Tag>
            <Tag color="orange">非精确 {counts.partial}</Tag>
            <Tag>冲突 {counts.conflict}</Tag>
          </Space>
          <PercentTable<ConsignmentMatchCandidate>
            rowKey="inventoryId"
            size="small"
            loading={candidatesQuery.isFetching}
            pagination={{ pageSize: 10, showSizeChanger: false }}
            scroll={{ x: 1210, y: 420 }}
            dataSource={visibleOptions}
            rowSelection={{
              // 整单只能选一条；拼单可多选，必须覆盖剩余份数才能提交。
              type: sharingEnabled ? 'checkbox' : 'radio',
              selectedRowKeys: selectedIds,
              onChange: (keys) => setSelectedIds(keys.map((key) => Number(key))),
            }}
            columns={[
              {
                title: '匹配打分',
                key: 'score',
                width: 100,
                render: (_, item) => {
                  const score = computeConsignmentMatchScore(item)
                  const tag = resolveScoreTag(item)
                  return (
                    <Space direction="vertical" size={3} style={{ width: '100%' }}>
                      <span style={{ fontSize: 18, fontWeight: 700, lineHeight: 1 }}>{score}</span>
                      <Tag color={tag.color} style={{ marginInlineEnd: 0 }}>
                        {tag.label}
                      </Tag>
                    </Space>
                  )
                },
              },
              {
                title: '匹配层级',
                key: 'priority',
                width: 105,
                render: (_, item) =>
                  item.priorityLabel ? (
                    <Tag
                      color={resolveConsignmentPriorityTagColor(item.priorityLabel)}
                      style={{ marginInlineEnd: 0 }}
                    >
                      {item.priorityLabel}
                    </Tag>
                  ) : (
                    <Typography.Text type="secondary">-</Typography.Text>
                  ),
              },
              {
                title: '寄卖单号',
                key: 'consignmentNo',
                width: 170,
                render: (_, item) => (
                  <Typography.Text
                    copyable={{ text: item.consignmentNo || item.inventoryNo }}
                    style={{ fontSize: 12 }}
                  >
                    {item.consignmentNo || item.inventoryNo || '-'}
                  </Typography.Text>
                ),
              },
              {
                title: '寄卖库存',
                key: 'inventory',
                width: 210,
                render: (_, item) => (
                  <Space direction="vertical" size={0}>
                    <Typography.Text strong>{item.itemName}</Typography.Text>
                    <Typography.Text type="secondary" style={{ fontSize: 12 }}>
                      {item.inventoryNo} · {item.workerName || `打手#${item.workerId || '-'}`}
                    </Typography.Text>
                  </Space>
                ),
              },
              {
                title: '规格',
                key: 'spec',
                width: 210,
                render: (_, item) =>
                  item.specText ||
                  `${item.system}/${item.serverZone}/${item.series}/${item.diamondLevel}钻/${item.brillianceCount}璀`,
              },
              {
                title: '库存',
                key: 'stock',
                width: 90,
                render: (_, item) => (
                  <Tag color={item.remainingQuantity > 1 ? 'blue' : 'default'}>
                    剩 {item.remainingQuantity}/{item.quantity}
                  </Tag>
                ),
              },
              {
                title: '售价',
                key: 'price',
                width: 100,
                render: (_, item) => money(item.salePriceFen),
              },
              {
                title: '匹配说明',
                key: 'reason',
                width: 280,
                render: (_, item) => (
                  <Space direction="vertical" size={2} style={{ width: '100%' }}>
                    <Typography.Text style={{ fontSize: 12 }}>
                      {describeConsignmentMatch(item)}
                    </Typography.Text>
                    {(item.matchDetails || [])
                      .filter((detail) => detail.status !== 'match' && detail.status !== 'ignored')
                      .slice(0, 3)
                      .map((detail) => (
                        <Typography.Text key={detail.key} type="secondary" style={{ fontSize: 11 }}>
                          {detail.label}：订单「{detail.orderValue || '-'}」/ 库存「
                          {detail.inventoryValue || '-'}」
                        </Typography.Text>
                      ))}
                  </Space>
                ),
              },
            ]}
          />
          {selectedIds.length > 0 && !coverage.sufficient ? (
            <Alert
              type="warning"
              showIcon
              message={
                sharingEnabled
                  ? `还差 ${coverage.gap} 份，拼单必须一次拼满才能提交`
                  : `所选库存仅剩 ${coverage.selectedQuantity} 件，整单需要 ${coverage.requiredQuantity} 件`
              }
            />
          ) : null}
          {nonExactSelected ? (
            <Space direction="vertical" size={6} style={{ width: '100%' }}>
              <Alert
                type="warning"
                showIcon
                message="已选择非精确库存：请确认规格差异，并填写人工匹配原因。"
              />
              <Input.TextArea
                rows={2}
                value={nonExactReason}
                onChange={(event) => setNonExactReason(event.target.value)}
                placeholder="例如：订单规格未写全，客服已与买家确认可用该库存"
              />
            </Space>
          ) : null}
          <Typography.Text type="secondary">
            已选 {selectedIds.length} 条，覆盖 {coverage.selectedQuantity}{' '}
            {sharingEnabled ? '份' : '件'}
          </Typography.Text>
        </Space>
      ) : null}
    </Modal>
  )
}