import { IconCopy } from '@douyinfe/semi-icons';
import { Button, Card, Form, Select, Space, Table, Tag, Toast } from '@douyinfe/semi-ui';
import { useEffect, useMemo, useState } from 'react';
import { api } from '../api/client';
import type { VehicleCoverageRow, VehicleCoverageSummary } from '../api/types';
import { DataEmpty } from '../components/DataEmpty';
import { PageHeader } from '../components/PageHeader';
import { SourceStatusTags } from '../components/SourceStatusTags';
import { StatusTag } from '../components/StatusTag';

function vehicleServiceStatus(row: VehicleCoverageRow) {
  if (row.serviceStatus) {
    return {
      label: row.serviceStatus.title,
      color: row.serviceStatus.severity === 'ok' ? 'green' as const : row.serviceStatus.severity === 'error' ? 'red' as const : 'orange' as const
    };
  }
  if (row.bindingStatus !== 'bound') {
    return { label: '身份未绑定', color: 'orange' as const };
  }
  if (row.sourceCount <= 0) {
    return { label: '暂无数据来源', color: 'orange' as const };
  }
  if (row.onlineSourceCount <= 0) {
    return { label: '车辆离线', color: 'red' as const };
  }
  if (row.onlineSourceCount < row.sourceCount) {
    return { label: '来源不完整', color: 'orange' as const };
  }
  return { label: '服务正常', color: 'green' as const };
}

function sourceEvidenceText(row: VehicleCoverageRow) {
  return `${row.onlineSourceCount}/${row.sourceCount} 来源在线`;
}

function sourceDiagnosisText(row: VehicleCoverageRow) {
  const parts = [sourceEvidenceText(row)];
  if ((row.missingProtocols ?? []).length > 0) {
    parts.push(`缺 ${row.missingProtocols.join('、')}`);
  } else if (row.sourceCount > 0) {
    parts.push('来源完整');
  } else {
    parts.push('暂无来源');
  }
  return parts.join('，');
}

function sourceConsistencyAction(row: VehicleCoverageRow, onFilter: (filters: Record<string, string>) => void) {
  const consistency = row.sourceConsistency;
  if (!consistency) {
    return <Tag color="grey">未诊断</Tag>;
  }
  const color = consistency.severity === 'ok' ? 'green' as const : consistency.severity === 'error' ? 'red' as const : 'orange' as const;
  const label = consistency.title || consistency.status;
  if ((consistency.missingProtocols ?? []).length > 0) {
    return (
      <Button
        size="small"
        theme="light"
        type={color === 'red' ? 'danger' : color === 'orange' ? 'warning' : 'primary'}
        onClick={() => onFilter({ serviceStatus: 'degraded', missingProtocol: consistency.missingProtocols[0] })}
      >
        {label}
      </Button>
    );
  }
  return <Tag color={color}>{label}</Tag>;
}

async function copyVehicleShareURL() {
  try {
    await navigator.clipboard.writeText(`${window.location.origin}${window.location.pathname}${window.location.hash}`);
    Toast.success('已复制筛选链接');
  } catch {
    Toast.error('复制筛选链接失败');
  }
}

export function Vehicles({
  onOpenVehicle,
  onFiltersChange,
  initialFilters = {}
}: {
  onOpenVehicle: (vin: string, protocol?: string) => void;
  onFiltersChange?: (filters: Record<string, string>) => void;
  initialFilters?: Record<string, string>;
}) {
  const [rows, setRows] = useState<VehicleCoverageRow[]>([]);
  const [summary, setSummary] = useState<VehicleCoverageSummary | null>(null);
  const [loading, setLoading] = useState(true);
  const [filters, setFilters] = useState<Record<string, string>>(initialFilters);
  const [pagination, setPagination] = useState({ currentPage: 1, pageSize: 20, total: 0 });
  const resultSummary = useMemo<Array<{ label: string; value: string; filters: Record<string, string> }>>(() => {
    const items: Array<{ label: string; value: string; filters: Record<string, string> }> = [
      { label: '过滤车辆', value: (summary?.totalVehicles ?? pagination.total).toLocaleString(), filters: {} },
      { label: '在线车辆', value: (summary?.onlineVehicles ?? 0).toLocaleString(), filters: { online: 'online' } },
      { label: '单源车辆', value: (summary?.singleSourceVehicles ?? 0).toLocaleString(), filters: { coverage: 'single' } },
      { label: '多源车辆', value: (summary?.multiSourceVehicles ?? 0).toLocaleString(), filters: { coverage: 'multi' } },
      { label: '暂无来源车辆', value: (summary?.noDataVehicles ?? 0).toLocaleString(), filters: { serviceStatus: 'no_data' } },
      { label: '待绑定', value: (summary?.unboundVehicles ?? 0).toLocaleString(), filters: { bindingStatus: 'unbound' } }
    ];
    for (const source of summary?.missingSources ?? []) {
      if (source.count <= 0) continue;
      items.push({
        label: `缺 ${source.protocol}`,
        value: source.count.toLocaleString(),
        filters: { missingProtocol: source.protocol }
      });
    }
    return items;
  }, [pagination.total, summary]);

  const load = (values: Record<string, string> = filters, page = pagination.currentPage, pageSize = pagination.pageSize) => {
    setLoading(true);
    const params = new URLSearchParams({ limit: String(pageSize), offset: String((page - 1) * pageSize) });
    if (values?.keyword) params.set('keyword', values.keyword);
    if (values?.protocol) params.set('protocol', values.protocol);
    if (values?.coverage) params.set('coverage', values.coverage);
    if (values?.missingProtocol) params.set('missingProtocol', values.missingProtocol);
    if (values?.online) params.set('online', values.online);
    if (values?.bindingStatus) params.set('bindingStatus', values.bindingStatus);
    if (values?.serviceStatus) params.set('serviceStatus', values.serviceStatus);
    const summaryParams = new URLSearchParams(params);
    summaryParams.delete('limit');
    summaryParams.delete('offset');
    Promise.all([api.vehicleCoverage(params), api.vehicleCoverageSummary(summaryParams)])
      .then(([nextPage, nextSummary]) => {
        setRows(nextPage.items);
        setSummary(nextSummary);
        setPagination({ currentPage: page, pageSize, total: nextPage.total });
      })
      .catch((error: Error) => Toast.error(error.message))
      .finally(() => setLoading(false));
  };

  const applyFilters = (nextFilters: Record<string, string>) => {
    setFilters(nextFilters);
    onFiltersChange?.(nextFilters);
    load(nextFilters, 1, pagination.pageSize);
  };

  useEffect(() => {
    setFilters(initialFilters);
    load(initialFilters, 1, pagination.pageSize);
  }, [JSON.stringify(initialFilters)]);

  const columns = useMemo(
    () => [
      { title: 'VIN', dataIndex: 'vin', width: 190 },
      { title: '车牌', dataIndex: 'plate', width: 120 },
      { title: '手机号', dataIndex: 'phone', width: 130 },
      { title: 'OEM', dataIndex: 'oem', width: 120 },
      {
        title: '车辆服务状态',
        width: 130,
        render: (_: unknown, row: VehicleCoverageRow) => {
          const status = vehicleServiceStatus(row);
          return <Tag color={status.color}>{status.label}</Tag>;
        }
      },
      {
        title: '来源证据',
        width: 300,
        render: (_: unknown, row: VehicleCoverageRow) => (
          <SourceStatusTags sourceStatus={row.sourceStatus} protocols={row.protocols} lastSeen={row.lastSeen} />
        )
      },
      {
        title: '缺失来源',
        width: 220,
        render: (_: unknown, row: VehicleCoverageRow) => (
          <Space spacing={4} wrap>
            {(row.missingProtocols ?? []).length > 0
              ? row.missingProtocols.map((protocol) => (
                <Button
                  key={protocol}
                  size="small"
                  theme="light"
                  type="warning"
                  onClick={() => applyFilters({ ...filters, missingProtocol: protocol })}
                >
                  缺 {protocol}
                </Button>
              ))
              : <Tag color="green">完整</Tag>}
          </Space>
        )
      },
      {
        title: '来源一致性',
        width: 140,
        render: (_: unknown, row: VehicleCoverageRow) => sourceConsistencyAction(row, (nextFilters) => applyFilters({ ...filters, ...nextFilters }))
      },
      { title: '诊断摘要', width: 240, render: (_: unknown, row: VehicleCoverageRow) => sourceDiagnosisText(row) },
      { title: '证据覆盖', width: 120, render: (_: unknown, row: VehicleCoverageRow) => sourceEvidenceText(row) },
      { title: '在线', width: 90, render: (_: unknown, row: VehicleCoverageRow) => <StatusTag status={row.online ? 'ok' : 'offline'} /> },
      { title: '最后在线', dataIndex: 'lastSeen', width: 170 },
      { title: '绑定', width: 90, render: (_: unknown, row: VehicleCoverageRow) => <Tag color={row.bindingStatus === 'bound' ? 'green' : 'orange'}>{row.bindingStatus === 'bound' ? '已绑定' : '未绑定'}</Tag> },
      { title: '操作', width: 110, render: (_: unknown, row: VehicleCoverageRow) => <Button onClick={() => onOpenVehicle(row.vin, filters.protocol)}>车辆服务</Button> }
    ],
    [filters, onOpenVehicle]
  );

  return (
    <div className="vp-page">
      <PageHeader title="车辆服务" description="以 VIN 为主对象维护车辆身份、数据来源覆盖、在线状态和绑定状态" />
      <Card bordered>
        <Form key={JSON.stringify(filters)} initValues={filters} layout="horizontal" onSubmit={(values) => {
          const nextFilters = values as Record<string, string>;
          applyFilters(nextFilters);
        }}>
          <Form.Input field="keyword" label="关键词" placeholder="VIN / 车牌 / 手机号 / OEM" style={{ width: 260 }} />
          <Form.Select field="protocol" label="数据来源" placeholder="全部来源" style={{ width: 180 }}>
            <Select.Option value="GB32960">GB32960</Select.Option>
            <Select.Option value="JT808">JT808</Select.Option>
            <Select.Option value="YUTONG_MQTT">YUTONG_MQTT</Select.Option>
          </Form.Select>
          <Form.Select field="coverage" label="来源覆盖" placeholder="全部" style={{ width: 130 }}>
            <Select.Option value="single">单源</Select.Option>
            <Select.Option value="multi">多源</Select.Option>
          </Form.Select>
          <Form.Select field="missingProtocol" label="缺失来源" placeholder="全部" style={{ width: 170 }} data-testid="missing-protocol-filter">
            <Select.Option value="GB32960">缺 GB32960</Select.Option>
            <Select.Option value="JT808">缺 JT808</Select.Option>
            <Select.Option value="YUTONG_MQTT">缺 YUTONG_MQTT</Select.Option>
          </Form.Select>
          <Form.Select field="serviceStatus" label="服务状态" placeholder="全部" style={{ width: 150 }} data-testid="service-status-filter">
            <Select.Option value="healthy">服务正常</Select.Option>
            <Select.Option value="degraded">来源不完整</Select.Option>
            <Select.Option value="offline">车辆离线</Select.Option>
            <Select.Option value="no_data">暂无数据来源</Select.Option>
            <Select.Option value="identity_required">身份未绑定</Select.Option>
          </Form.Select>
          <Form.Select field="online" label="在线" placeholder="全部" style={{ width: 130 }}>
            <Select.Option value="online">在线</Select.Option>
            <Select.Option value="offline">离线</Select.Option>
          </Form.Select>
          <Form.Select field="bindingStatus" label="绑定" placeholder="全部" style={{ width: 130 }}>
            <Select.Option value="bound">已绑定</Select.Option>
            <Select.Option value="unbound">未绑定</Select.Option>
          </Form.Select>
          <Space>
            <Button htmlType="submit" theme="solid" type="primary">查询</Button>
            <Button icon={<IconCopy />} onClick={copyVehicleShareURL}>复制筛选链接</Button>
            <Button onClick={() => {
              applyFilters({});
            }}>重置</Button>
          </Space>
        </Form>
      </Card>
      <Card bordered title="当前车辆结果" style={{ marginTop: 16 }}>
        <div className="vp-result-summary-grid">
          {resultSummary.map((item) => (
            <button
              key={item.label}
              className="vp-result-summary-item vp-result-summary-button"
              type="button"
              aria-label={`${item.label} ${item.value}`}
              onClick={() => applyFilters({ ...filters, ...item.filters })}
            >
              <div className="vp-result-summary-value">{item.value}</div>
              <div className="vp-result-summary-label">{item.label}</div>
            </button>
          ))}
        </div>
      </Card>
      <Card bordered style={{ marginTop: 16 }}>
        {rows.length === 0 && !loading ? (
          <DataEmpty />
        ) : (
          <Table
            loading={loading}
            rowKey="vin"
            dataSource={rows}
            columns={columns}
            pagination={{
              currentPage: pagination.currentPage,
              pageSize: pagination.pageSize,
              total: pagination.total,
              showSizeChanger: true,
              onPageChange: (page) => load(filters, page, pagination.pageSize),
              onPageSizeChange: (pageSize) => load(filters, 1, pageSize)
            }}
          />
        )}
      </Card>
    </div>
  );
}