import { ReloadOutlined, SearchOutlined } from '@ant-design/icons'
import { useQuery } from '@tanstack/react-query'
import {
  Alert,
  App,
  Button,
  Card,
  Col,
  Form,
  Row,
  Select,
  Space,
  Statistic,
  Tabs,
  Tag,
  Typography,
} from 'antd'
import PercentTable from '@/components/common/PercentTable'
import type { TableColumnsType } from 'antd'
import { useState } from 'react'

import { AdminRangePicker } from '@/components/admin/AdminDatePicker'
import PageHeader from '@/components/admin/PageHeader'
import FinanceSubNav from '@/components/admin/FinanceSubNav'
import dayjs from '@/lib/dayjs'
import {
  fetchAdminSalesDailyFacts,
  fetchAdminSalesProfitOverview,
  rebuildAdminSalesDailyFacts,
} from '@/services/admin'
import type { AdminSalesDailyFact } from '@/types/admin/finance'
import { ADMIN_DEFAULT_PAGE_SIZE, buildAdminTablePagination } from '@/utils/admin-pagination'
import { hasAdminPermission } from '@/utils/admin-auth'
import { formatMoney } from './panels/shared'

type FilterForm = { dateRange?: unknown; provider?: string; fulfillmentMode?: string }

const FULFILLMENT_MODE_OPTIONS = [
  { value: '', label: '全部履约方式' },
  { value: 'work_order', label: '接单平台' },
  { value: 'affiliate_dash', label: '自动发货' },
  { value: 'legacy_platform', label: '历史平台' },
  { value: 'manual', label: '人工客服' },
]

const FULFILLMENT_MODE_LABEL: Record<string, string> = {
  work_order: '接单平台',
  affiliate_dash: '自动发货',
  legacy_platform: '历史平台',
  manual: '人工客服',
}

const COST_STAGE_LABEL: Record<string, { label: string; color: string }> = {
  missing: { label: '无成本', color: 'red' },
  partial: { label: '部分缺失', color: 'orange' },
  estimated: { label: '预估成本', color: 'blue' },
  actual: { label: '实际成本', color: 'green' },
}

export default function AdminSalesProfitPage() {
  const { message } = App.useApp()
  const [form] = Form.useForm<FilterForm>()
  const canConfig = hasAdminPermission('finance.post')
  const defaultDateFrom = dayjs().subtract(29, 'day').format('YYYY-MM-DD')
  const defaultDateTo = dayjs().format('YYYY-MM-DD')
  const [filters, setFilters] = useState<{
    dateFrom: string
    dateTo: string
    provider: string
    fulfillmentMode: string
  }>({ dateFrom: defaultDateFrom, dateTo: defaultDateTo, provider: '', fulfillmentMode: '' })
  const [page, setPage] = useState(1)
  const [pageSize, setPageSize] = useState(ADMIN_DEFAULT_PAGE_SIZE)
  const [rebuilding, setRebuilding] = useState(false)

  const overviewQuery = useQuery({
    queryKey: ['admin-sales-profit-overview', filters],
    queryFn: () => fetchAdminSalesProfitOverview(filters),
  })
  const factsQuery = useQuery({
    queryKey: ['admin-sales-daily-facts', filters, page, pageSize],
    queryFn: () => fetchAdminSalesDailyFacts({ ...filters, page, pageSize }),
  })

  const overview = overviewQuery.data?.data
  const facts = factsQuery.data?.data

  function applyFilters(values: FilterForm) {
    const range = Array.isArray(values.dateRange) ? values.dateRange : []
    setPage(1)
    setFilters({
      dateFrom: range[0] ? dayjs(range[0]).format('YYYY-MM-DD') : '',
      dateTo: range[1] ? dayjs(range[1]).format('YYYY-MM-DD') : '',
      provider: values.provider || '',
      fulfillmentMode: values.fulfillmentMode || '',
    })
  }

  function resetFilters() {
    form.resetFields()
    setPage(1)
    setFilters({
      dateFrom: defaultDateFrom,
      dateTo: defaultDateTo,
      provider: '',
      fulfillmentMode: '',
    })
  }

  async function rebuildFacts() {
    setRebuilding(true)
    try {
      const response = await rebuildAdminSalesDailyFacts({
        dateFrom: filters.dateFrom || undefined,
        dateTo: filters.dateTo || undefined,
      })
      message.success(
        `销售事实已重算：${response.data.insertedCount} 行，范围 ${response.data.range.fromDate} ~ ${response.data.range.toDate}`,
      )
      await Promise.all([overviewQuery.refetch(), factsQuery.refetch()])
    } catch (error) {
      message.error(error instanceof Error ? error.message : '重算销售事实失败')
    } finally {
      setRebuilding(false)
    }
  }

  const summary = overview?.overview
  const dailyColumns: TableColumnsType<NonNullable<typeof overview>['daily'][number]> = [
    { title: '日期', dataIndex: 'statDate', width: 120 },
    { title: '订单项', dataIndex: 'itemCount', width: 90 },
    { title: '销售收入', dataIndex: 'grossRevenueFen', render: formatMoney },
    { title: '退款', dataIndex: 'refundAmountFen', render: formatMoney },
    { title: '成本', dataIndex: 'costAmountFen', render: formatMoney },
    { title: '缺失成本', dataIndex: 'costMissingCount', width: 100 },
    {
      title: '毛利',
      dataIndex: 'grossProfitFen',
      render: (value: number) => (
        <Typography.Text type={value >= 0 ? 'success' : 'danger'}>
          {formatMoney(value)}
        </Typography.Text>
      ),
    },
  ]

  const productColumns: TableColumnsType<NonNullable<typeof overview>['byProduct'][number]> = [
    {
      title: '标准商品',
      dataIndex: 'canonicalName',
      width: 320,
      ellipsis: true,
      render: (value: string, row) => (
        <Space size={4}>
          <span>{value}</span>
          {row.canonicalProductId ? (
            <Tag>{row.canonicalSku}</Tag>
          ) : (
            <Tag color="orange">未归一</Tag>
          )}
        </Space>
      ),
    },
    { title: '订单项', dataIndex: 'itemCount', width: 90 },
    { title: '销售收入', dataIndex: 'grossRevenueFen', render: formatMoney },
    { title: '成本', dataIndex: 'costAmountFen', render: formatMoney },
    { title: '缺失成本', dataIndex: 'costMissingCount', width: 100 },
    {
      title: '毛利',
      dataIndex: 'grossProfitFen',
      render: (value: number) => (
        <Typography.Text type={value >= 0 ? 'success' : 'danger'}>
          {formatMoney(value)}
        </Typography.Text>
      ),
    },
  ]

  const fulfillmentModeColumns: TableColumnsType<
    NonNullable<typeof overview>['byFulfillmentMode'][number]
  > = [
    {
      title: '履约方式',
      dataIndex: 'fulfillmentMode',
      render: (value: string) => FULFILLMENT_MODE_LABEL[value] || value,
    },
    { title: '订单项', dataIndex: 'itemCount', width: 90 },
    { title: '销售收入', dataIndex: 'grossRevenueFen', render: formatMoney },
    { title: '成本', dataIndex: 'costAmountFen', render: formatMoney },
    { title: '缺失成本', dataIndex: 'costMissingCount', width: 100 },
    {
      title: '毛利',
      dataIndex: 'grossProfitFen',
      render: (value: number) => (
        <Typography.Text type={value >= 0 ? 'success' : 'danger'}>
          {formatMoney(value)}
        </Typography.Text>
      ),
    },
  ]

  const factColumns: TableColumnsType<AdminSalesDailyFact> = [
    { title: '日期', dataIndex: 'statDate', width: 110 },
    { title: '来源', dataIndex: 'provider', width: 120 },
    {
      title: '店铺',
      dataIndex: 'shopId',
      width: 140,
      ellipsis: true,
      render: (value) => value || '全局',
    },
    {
      title: '商品',
      dataIndex: 'canonicalName',
      width: 260,
      ellipsis: true,
      render: (value: string, row) =>
        row.canonicalProductId ? value : <Tag color="orange">未归一</Tag>,
    },
    {
      title: '履约方式',
      dataIndex: 'fulfillmentMode',
      width: 100,
      render: (value: string) => FULFILLMENT_MODE_LABEL[value] || value,
    },
    { title: '订单项', dataIndex: 'itemCount', width: 80 },
    { title: '销售收入', dataIndex: 'grossRevenueFen', width: 120, render: formatMoney },
    { title: '成本', dataIndex: 'costAmountFen', width: 120, render: formatMoney },
    {
      title: '成本状态',
      dataIndex: 'costStage',
      width: 110,
      render: (value: string) => {
        const meta = COST_STAGE_LABEL[value] || { label: value, color: 'default' }
        return <Tag color={meta.color}>{meta.label}</Tag>
      },
    },
    {
      title: '毛利',
      dataIndex: 'grossProfitFen',
      width: 130,
      render: (value: number) => (
        <Typography.Text type={value >= 0 ? 'success' : 'danger'}>
          {formatMoney(value)}
        </Typography.Text>
      ),
    },
  ]

  return (
    <section className="page-stack">
      <FinanceSubNav current="/admin/sales-profit" />
      <PageHeader
        title="销售毛利"
        description="按订单项归集收入与成本；未归一商品单独成行，成本缺失时毛利不直接用于决策。"
      />

      <Card>
        <Form<FilterForm>
          form={form}
          layout="inline"
          className="filter-form"
          onFinish={applyFilters}
          initialValues={{
            dateRange: [dayjs().subtract(29, 'day'), dayjs()],
            provider: '',
            fulfillmentMode: '',
          }}
        >
          <Form.Item name="dateRange" label="销售日期">
            <AdminRangePicker format="YYYY-MM-DD" />
          </Form.Item>
          <Form.Item name="provider" label="来源">
            <Select
              style={{ width: 150 }}
              options={[
                { value: '', label: '全部来源' },
                { value: '91kaquan', label: '91卡券' },
                { value: 'pdd', label: '拼多多' },
                { value: 'douyin_mashida', label: '抖音码速达' },
              ]}
            />
          </Form.Item>
          <Form.Item name="fulfillmentMode" label="履约方式">
            <Select style={{ width: 150 }} options={FULFILLMENT_MODE_OPTIONS} />
          </Form.Item>
          <Form.Item>
            <Space>
              <Button type="primary" icon={<SearchOutlined />} htmlType="submit">
                查询
              </Button>
              <Button onClick={resetFilters}>重置</Button>
              {canConfig ? (
                <Button icon={<ReloadOutlined />} loading={rebuilding} onClick={rebuildFacts}>
                  重算销售事实
                </Button>
              ) : null}
            </Space>
          </Form.Item>
        </Form>
      </Card>

      {overviewQuery.error ? (
        <Alert
          type="error"
          showIcon
          message="读取销售毛利失败"
          description={
            overviewQuery.error instanceof Error ? overviewQuery.error.message : '请稍后重试'
          }
        />
      ) : null}

      {summary && summary.costMissingCount > 0 ? (
        <Alert
          type="warning"
          showIcon
          message={`有 ${summary.costMissingCount} 个订单项没有成本快照，涉及收入 ${formatMoney(summary.costMissingRevenueFen)}，当前毛利偏高`}
          description="请先在「商品与成本」中补齐成本项/版本并回填快照，再使用毛利数据做经营决策。"
        />
      ) : null}

      {summary && summary.unmappedRevenuePct > 0 ? (
        <Alert
          type="info"
          showIcon
          message={`未归一商品收入占 ${summary.unmappedRevenuePct.toFixed(2)}%`}
          description={`未归一收入 ${formatMoney(summary.unmappedRevenueFen)}，已单独成行；建议补渠道 SKU 映射。`}
        />
      ) : null}

      {summary && summary.ordersWithoutItems > 0 ? (
        <Alert
          type="info"
          showIcon
          message={`有 ${summary.ordersWithoutItems} 个已支付订单没有订单项`}
          description={`涉及 ${formatMoney(summary.revenueWithoutItemsFen)}，无法归集到商品与成本，未进入销售事实。`}
        />
      ) : null}

      <Row gutter={[12, 12]}>
        <Col xs={12} md={8} xl={4}>
          <Card>
            <Statistic
              title="销售收入"
              value={summary?.grossRevenueFen || 0}
              formatter={() => formatMoney(summary?.grossRevenueFen || 0)}
            />
          </Card>
        </Col>
        <Col xs={12} md={8} xl={4}>
          <Card>
            <Statistic
              title="净收入"
              value={summary?.netRevenueFen || 0}
              formatter={() => formatMoney(summary?.netRevenueFen || 0)}
            />
          </Card>
        </Col>
        <Col xs={12} md={8} xl={4}>
          <Card>
            <Statistic
              title="成本"
              value={summary?.costAmountFen || 0}
              formatter={() => formatMoney(summary?.costAmountFen || 0)}
            />
          </Card>
        </Col>
        <Col xs={12} md={8} xl={4}>
          <Card>
            <Statistic
              title="毛利"
              value={summary?.grossProfitFen || 0}
              valueStyle={{ color: (summary?.grossProfitFen || 0) >= 0 ? '#3f8600' : '#cf1322' }}
              formatter={() => formatMoney(summary?.grossProfitFen || 0)}
            />
          </Card>
        </Col>
        <Col xs={12} md={8} xl={4}>
          <Card>
            <Statistic title="订单数" value={summary?.orderCount || 0} />
          </Card>
        </Col>
        <Col xs={12} md={8} xl={4}>
          <Card>
            <Statistic title="订单项" value={summary?.itemCount || 0} />
          </Card>
        </Col>
      </Row>

      <Card>
        <Tabs
          items={[
            {
              key: 'daily',
              label: '日报',
              children: (
                <PercentTable
                  rowKey="statDate"
                  size="small"
                  columns={dailyColumns}
                  dataSource={overview?.daily || []}
                  loading={overviewQuery.isLoading}
                  pagination={false}
                  scroll={{ x: 900 }}
                />
              ),
            },
            {
              key: 'product',
              label: '商品',
              children: (
                <PercentTable
                  rowKey={(row) => `${row.canonicalProductId || 'unmapped'}`}
                  size="small"
                  columns={productColumns}
                  dataSource={overview?.byProduct || []}
                  loading={overviewQuery.isLoading}
                  pagination={false}
                  scroll={{ x: 900 }}
                />
              ),
            },
            {
              key: 'fulfillment-mode',
              label: '履约方式',
              children: (
                <PercentTable
                  rowKey="fulfillmentMode"
                  size="small"
                  columns={fulfillmentModeColumns}
                  dataSource={overview?.byFulfillmentMode || []}
                  loading={overviewQuery.isLoading}
                  pagination={false}
                  scroll={{ x: 800 }}
                />
              ),
            },
            {
              key: 'facts',
              label: '事实明细',
              children: (
                <PercentTable
                  rowKey="id"
                  size="small"
                  columns={factColumns}
                  dataSource={facts?.items || []}
                  loading={factsQuery.isLoading}
                  pagination={buildAdminTablePagination({
                    current: page,
                    pageSize,
                    total: facts?.pagination.total || 0,
                    showTotal: (total) => `共 ${total} 条事实`,
                    onChange: (nextPage, nextPageSize) => {
                      setPage(nextPage)
                      setPageSize(nextPageSize)
                    },
                  })}
                  scroll={{ x: 1400 }}
                />
              ),
            },
          ]}
        />
      </Card>
    </section>
  )
}