/**
 * 人工 SKU 配置 Tab：扫描 → 配置 → 重新匹配。
 *
 * 口径（2026-10-24 确认）：
 *   * 配置主键是**内部 SKU**（快手 skuNick / 拼多多 outSkuSn），商品名称仅供识别；
 *   * 同名 SKU 算同一个商品，跨渠道共用一份配置；
 *   * 客服人工有四个钱包：南航积分 / 乐玩积分 / ROCK 积分 / 备用金现金；
 *   * 积分换算率按平台不同（南航、乐玩 1 积分 = 1 分；ROCK 1 积分 = 1 元）；
 *   * 消耗积分填 0 = 成本不固定，客服确认履约时手填实际成本。
 *
 * 这里没有匹配引擎、没有打分：就是一张带统计的 SKU 配置清单。
 */
import {
  DeleteOutlined,
  EditOutlined,
  ReloadOutlined,
  ScanOutlined,
  SyncOutlined,
} from '@ant-design/icons'
import {
  Alert,
  App,
  Button,
  Card,
  Col,
  DatePicker,
  Form,
  Input,
  InputNumber,
  Modal,
  Popconfirm,
  Row,
  Select,
  Space,
  Statistic,
  Table,
  Tag,
  Typography,
} from 'antd'
import type { TableColumnsType } from 'antd'
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
import { useState } from 'react'

import {
  deleteAdminManualConfig,
  fetchAdminManualPlatforms,
  fetchAdminManualSkuOverview,
  fetchAdminManualSkus,
  rematchAdminManualFulfillments,
  saveAdminManualConfig,
  scanAdminManualSkus,
} from '@/services/admin'
import type { ManualSkuItem } from '@/types/admin'
import { ADMIN_DEFAULT_PAGE_SIZE, buildAdminTablePagination } from '@/utils/admin-pagination'
import dayjs from '@/lib/dayjs'
import type { Dayjs } from 'dayjs'

type ConfigFormValues = {
  platformKey: string
  creditQuantity: number
  note?: string
}

const PLATFORM_TAG_COLORS: Record<string, string> = {
  nanhang: 'blue',
  lewan: 'purple',
  rock: 'cyan',
  fund_cash: 'orange',
}

/** 按换算率把「消耗单位」翻译成人话。 */
function unitLabel(platformKey: string, creditUnitPriceFen: number) {
  if (platformKey === 'fund_cash') return '元'
  if (creditUnitPriceFen >= 100) return '积分（1积分=1元）'
  return '积分（1积分=1分）'
}

export function ManualSkuConfigPanel() {
  const { message } = App.useApp()
  const queryClient = useQueryClient()
  const [form] = Form.useForm<ConfigFormValues>()

  const [keyword, setKeyword] = useState('')
  const [status, setStatus] = useState<'all' | 'configured' | 'unconfigured'>('unconfigured')
  const [platformKey, setPlatformKey] = useState('')
  const [page, setPage] = useState(1)
  const [pageSize, setPageSize] = useState(ADMIN_DEFAULT_PAGE_SIZE)
  const [scanRange, setScanRange] = useState<[Dayjs, Dayjs]>([
    dayjs().startOf('month'),
    dayjs().endOf('month'),
  ])
  const [modalOpen, setModalOpen] = useState(false)
  const [editing, setEditing] = useState<ManualSkuItem | null>(null)

  const listQuery = useQuery({
    queryKey: ['admin-cost-center-manual-skus', keyword, status, platformKey, page, pageSize],
    queryFn: () =>
      fetchAdminManualSkus({
        keyword: keyword || undefined,
        status: status === 'all' ? '' : status,
        platformKey: platformKey || undefined,
        page,
        pageSize,
      }),
  })
  const overviewQuery = useQuery({
    queryKey: ['admin-cost-center-manual-skus-overview'],
    queryFn: fetchAdminManualSkuOverview,
  })
  const platformQuery = useQuery({
    queryKey: ['admin-cost-center-manual-platforms'],
    queryFn: fetchAdminManualPlatforms,
  })

  const overview = overviewQuery.data?.data
  const platforms = platformQuery.data?.data.items || []
  const platformMap = new Map(platforms.map((item) => [item.key, item]))

  const scanMutation = useMutation({
    mutationFn: () =>
      scanAdminManualSkus({
        fromDate: scanRange[0].format('YYYY-MM-DD'),
        toDate: scanRange[1].format('YYYY-MM-DD'),
      }),
    onSuccess: (response) => {
      const result = response.data
      message.success(`扫描完成，登记 ${result.registered} 个内部 SKU`)
      void queryClient.invalidateQueries({ queryKey: ['admin-cost-center-manual-skus'] })
      void queryClient.invalidateQueries({
        queryKey: ['admin-cost-center-manual-skus-overview'],
      })
    },
    onError: (error) => {
      message.error(error instanceof Error ? error.message : '扫描失败')
    },
  })

  const saveMutation = useMutation({
    mutationFn: (values: ConfigFormValues) =>
      saveAdminManualConfig({
        skuKey: editing?.skuKey || '',
        platformKey: values.platformKey,
        creditQuantity: values.creditQuantity,
        note: values.note || '',
      }),
    onSuccess: () => {
      message.success('配置已保存')
      setModalOpen(false)
      void queryClient.invalidateQueries({ queryKey: ['admin-cost-center-manual-skus'] })
      void queryClient.invalidateQueries({
        queryKey: ['admin-cost-center-manual-skus-overview'],
      })
    },
    onError: (error) => {
      message.error(error instanceof Error ? error.message : '保存失败')
    },
  })

  const deleteMutation = useMutation({
    mutationFn: (skuKey: string) => deleteAdminManualConfig(skuKey),
    onSuccess: () => {
      message.success('配置已删除')
      void queryClient.invalidateQueries({ queryKey: ['admin-cost-center-manual-skus'] })
      void queryClient.invalidateQueries({
        queryKey: ['admin-cost-center-manual-skus-overview'],
      })
    },
    onError: (error) => {
      message.error(error instanceof Error ? error.message : '删除失败')
    },
  })

  const rematchMutation = useMutation({
    mutationFn: () => rematchAdminManualFulfillments(),
    onSuccess: (response) => {
      message.success(`重新匹配完成，回填 ${response.data.updatedCount} 个订单项`)
      void queryClient.invalidateQueries({ queryKey: ['admin-cost-center-manual-skus'] })
    },
    onError: (error) => {
      message.error(error instanceof Error ? error.message : '重新匹配失败')
    },
  })

  function openConfig(item: ManualSkuItem) {
    setEditing(item)
    form.setFieldsValue({
      platformKey: item.config?.platformKey || undefined,
      creditQuantity: item.config?.creditQuantity ?? undefined,
      note: item.config?.note || '',
    })
    setModalOpen(true)
  }

  const columns: TableColumnsType<ManualSkuItem> = [
    {
      title: '内部 SKU（配置主键）',
      dataIndex: 'skuKey',
      width: 280,
      render: (_, row) => (
        <div className="cell-stack">
          <Typography.Text strong copyable={{ text: row.skuKey }}>
            {row.skuKey}
          </Typography.Text>
          <Typography.Text type="secondary" style={{ fontSize: 12 }}>
            {row.displayName || '（无名称）'}
          </Typography.Text>
        </div>
      ),
    },
    { title: '店铺', dataIndex: 'shopCount', width: 70, align: 'right' },
    { title: '订单数', dataIndex: 'orderCount', width: 90, align: 'right' },
    { title: '订单项', dataIndex: 'itemCount', width: 90, align: 'right' },
    {
      title: '收入',
      dataIndex: 'revenueFen',
      width: 110,
      align: 'right',
      render: (value: number) => `¥${(Number(value || 0) / 100).toFixed(0)}`,
    },
    {
      title: '履约渠道',
      key: 'platform',
      width: 150,
      render: (_, row) =>
        row.config ? (
          <Space size={4} direction="vertical">
            <Tag color={PLATFORM_TAG_COLORS[row.config.platformKey] || 'default'}>
              {row.config.platformLabel || row.config.platformKey}
            </Tag>
            <Typography.Text type="secondary" style={{ fontSize: 12 }}>
              {row.config.creditQuantity}{' '}
              {unitLabel(row.config.platformKey, row.config.creditUnitPriceFen)}
            </Typography.Text>
          </Space>
        ) : (
          <Typography.Text type="secondary">未配置</Typography.Text>
        ),
    },
    {
      title: '成本',
      key: 'cost',
      width: 110,
      align: 'right',
      render: (_, row) =>
        row.config ? (
          row.config.costMode === 'fixed' ? (
            <Typography.Text>¥{(row.config.costFen / 100).toFixed(2)}</Typography.Text>
          ) : (
            <Tag color="orange">不固定·客服填</Tag>
          )
        ) : (
          '-'
        ),
    },
    {
      title: '操作',
      key: 'actions',
      width: 130,
      fixed: 'right',
      render: (_, row) => (
        <Space size={4}>
          <Button size="small" icon={<EditOutlined />} onClick={() => openConfig(row)}>
            {row.configured ? '编辑' : '配置'}
          </Button>
          {row.configured ? (
            <Popconfirm
              title="删除该 SKU 的配置？"
              description="删除后该 SKU 回到未配置状态，已回填的订单项不再带配置。"
              okText="删除"
              cancelText="取消"
              onConfirm={() => deleteMutation.mutate(row.skuKey)}
            >
              <Button size="small" danger icon={<DeleteOutlined />} />
            </Popconfirm>
          ) : null}
        </Space>
      ),
    },
  ]

  const selectedPlatform = form.getFieldValue('platformKey')
  const selectedCredit = form.getFieldValue('creditQuantity')
  const previewUnitPrice = platformMap.get(selectedPlatform)?.creditUnitPriceFen ?? 0
  const previewCostFen =
    selectedPlatform && Number(selectedCredit) > 0 ? Number(selectedCredit) * previewUnitPrice : 0

  return (
    <Card bordered={false} title="人工 SKU 配置">
      <Alert
        type="info"
        showIcon
        style={{ marginBottom: 14 }}
        message="配置主键是内部 SKU，不是商品名称"
        description="扫描后列出所有走到人工履约的内部 SKU。运营在这里配置「履约渠道 + 消耗积分」，保存后点「重新匹配」回填到历史订单项。客服确认履约时直接读配置，固定成本零输入。消耗积分填 0 表示成本不固定，由客服在确认履约时手填。"
      />

      <Row gutter={12} style={{ marginBottom: 12 }}>
        <Col span={6}>
          <Statistic title="内部 SKU 总数" value={overview?.totalSku ?? 0} />
        </Col>
        <Col span={6}>
          <Statistic
            title="已配置"
            value={overview?.configuredSku ?? 0}
            valueStyle={{ color: '#389e0d' }}
          />
        </Col>
        <Col span={6}>
          <Statistic
            title="未配置"
            value={overview?.unconfiguredSku ?? 0}
            valueStyle={{ color: '#cf1322' }}
          />
        </Col>
        <Col span={6}>
          <Statistic
            title="未配置覆盖的订单项"
            value={overview?.unconfiguredItems ?? 0}
            suffix="单"
            valueStyle={{ color: '#d46b08' }}
          />
        </Col>
      </Row>

      <Space wrap style={{ marginBottom: 12 }}>
        <DatePicker.RangePicker
          value={scanRange}
          onChange={(value) => {
            if (value?.[0] && value?.[1]) setScanRange([value[0], value[1]])
          }}
        />
        <Button
          type="primary"
          icon={<ScanOutlined />}
          loading={scanMutation.isPending}
          onClick={() => scanMutation.mutate()}
        >
          扫描内部 SKU
        </Button>
        <Button
          icon={<SyncOutlined />}
          loading={rematchMutation.isPending}
          onClick={() => rematchMutation.mutate()}
        >
          重新匹配已配置
        </Button>
        <Input.Search
          placeholder="搜索内部 SKU 或名称"
          allowClear
          style={{ width: 220 }}
          onSearch={(value) => {
            setKeyword(value.trim())
            setPage(1)
          }}
        />
        <Select
          value={status}
          style={{ width: 120 }}
          onChange={(value) => {
            setStatus(value)
            setPage(1)
          }}
          options={[
            { value: 'unconfigured', label: '未配置' },
            { value: 'configured', label: '已配置' },
            { value: 'all', label: '全部' },
          ]}
        />
        <Select
          value={platformKey}
          allowClear
          placeholder="全部渠道"
          style={{ width: 140 }}
          onChange={(value) => {
            setPlatformKey(value || '')
            setPage(1)
          }}
          options={platforms.map((item) => ({ value: item.key, label: item.label }))}
        />
        <Button icon={<ReloadOutlined />} onClick={() => void listQuery.refetch()}>
          刷新
        </Button>
      </Space>

      <Table
        rowKey="id"
        size="small"
        columns={columns}
        dataSource={listQuery.data?.data.items || []}
        loading={listQuery.isLoading}
        scroll={{ x: 1020 }}
        pagination={buildAdminTablePagination({
          page,
          pageSize,
          total: listQuery.data?.data.pagination.total ?? 0,
          onChange: (nextPage, nextPageSize) => {
            setPage(nextPage)
            if (nextPageSize !== pageSize) setPageSize(nextPageSize)
          },
        })}
      />

      <Modal
        open={modalOpen}
        title={`配置人工履约 · ${editing?.skuKey || ''}`}
        okText="保存配置"
        cancelText="取消"
        confirmLoading={saveMutation.isPending}
        onOk={() => {
          void form.validateFields().then((values) => saveMutation.mutate(values))
        }}
        onCancel={() => setModalOpen(false)}
        destroyOnHidden
        width={560}
      >
        <Alert
          type="warning"
          showIcon
          style={{ marginBottom: 14 }}
          message={`商品名称：${editing?.displayName || '（无）'}（仅供识别）`}
          description="渠道提前配置好，客服确认履约时不需要选择。消耗积分填 0 表示成本不固定，客服会在确认履约时手填实际成本。"
        />
        <Form<ConfigFormValues> form={form} layout="vertical">
          <Form.Item
            name="platformKey"
            label="履约渠道"
            rules={[{ required: true, message: '请选择履约渠道' }]}
          >
            <Select
              placeholder="请选择渠道"
              options={platforms.map((item) => ({
                value: item.key,
                label: `${item.label}（${unitLabel(item.key, item.creditUnitPriceFen)}）`,
              }))}
              onChange={() => form.validateFields(['creditQuantity'])}
            />
          </Form.Item>
          <Form.Item
            name="creditQuantity"
            label="每单消耗积分"
            rules={[{ required: true, message: '请输入消耗积分' }]}
            extra="填 0 表示成本不固定，客服确认履约时手填实际成本。"
          >
            <InputNumber min={0} precision={0} style={{ width: '100%' }} placeholder="例如 10" />
          </Form.Item>
          <Form.Item label="折算成本">
            <Typography.Text strong>
              {previewCostFen > 0
                ? `¥${(previewCostFen / 100).toFixed(2)}（${previewCostFen} 分）`
                : '成本不固定，由客服手填'}
            </Typography.Text>
          </Form.Item>
          <Form.Item name="note" label="备注">
            <Input.TextArea rows={2} maxLength={300} showCount />
          </Form.Item>
        </Form>
      </Modal>
    </Card>
  )
}