import { useEffect, useMemo, useState } from 'react';
import { Plus, Search } from 'lucide-react';
import { Breadcrumb, Button, DateRangeInput, Input, ManualRechargeDialog, Pagination, Tag, type DateRangeValue } from '@/components/ui';
import { adminApi, type RechargeOrder, type TenantAccount, type TenantOption } from '@/api/adminApi';
import { formatDateTime } from '@/utils/dateTime';
import { formatCents } from '@/utils/currency';

function getDate(value: string) {
  return value.slice(0, 10);
}

function RemarkCell({ value }: { value?: string }) {
  return (
    <div className={['admin-remark-cell', value ? '' : 'admin-remark-cell--empty'].filter(Boolean).join(' ')}>
      {value || '暂无备注'}
    </div>
  );
}

export function AdminRechargeRecordsPage() {
  const [records, setRecords] = useState<RechargeOrder[]>([]);
  const [tenants, setTenants] = useState<TenantOption[]>([]);
  const [accounts, setAccounts] = useState<TenantAccount[]>([]);
  const [enterpriseKeyword, setEnterpriseKeyword] = useState('');
  const [dateRange, setDateRange] = useState<DateRangeValue>({});
  const [manualOpen, setManualOpen] = useState(false);
  const [page, setPage] = useState(1);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState('');

  async function loadData() {
    setLoading(true);
    setError('');
    try {
      const [nextTenants, nextAccounts, nextRecords] = await Promise.all([
        adminApi.listTenants(),
        adminApi.listAccounts(),
        adminApi.listManualRecharges(),
      ]);
      setTenants(nextTenants);
      setAccounts(nextAccounts);
      setRecords(nextRecords);
    } catch (err) {
      setError(err instanceof Error ? err.message : '充值记录加载失败');
      setRecords([]);
    } finally {
      setLoading(false);
    }
  }

  useEffect(() => {
    void loadData();
  }, []);

  const filteredRows = useMemo(
    () => records.filter((item) => {
      const rechargeDate = getDate(item.paidAt ?? item.createdAt);
      const tenantName = item.tenant?.name ?? tenants.find((tenant) => tenant.id === item.tenantId)?.name ?? item.tenantId;
      const matchesEnterprise = !enterpriseKeyword || tenantName.includes(enterpriseKeyword);
      const matchesStartDate = !dateRange.start || rechargeDate >= dateRange.start;
      const matchesEndDate = !dateRange.end || rechargeDate <= dateRange.end;
      return matchesEnterprise && matchesStartDate && matchesEndDate;
    }),
    [dateRange.end, dateRange.start, enterpriseKeyword, records, tenants],
  );
  const pageSize = 10;
  const totalPages = Math.max(1, Math.ceil(filteredRows.length / pageSize));
  const currentPage = Math.min(page, totalPages);
  const visibleRows = filteredRows.slice((currentPage - 1) * pageSize, currentPage * pageSize);

  useEffect(() => {
    setPage(1);
  }, [dateRange.end, dateRange.start, enterpriseKeyword, records.length]);

  function resetFilters() {
    setEnterpriseKeyword('');
    setDateRange({});
  }

  return (
    <section className="page-stack admin-recharge-page">
      <div className="page-heading">
        <div>
          <Breadcrumb items={['数据详单', '充值记录']} />
          <h1>充值记录</h1>
        </div>
        <Button icon={<Plus size={16} />} onClick={() => setManualOpen(true)}>人工充值</Button>
      </div>

      <div className="surface admin-recharge-filter">
        <Input label="企业名称" onChange={(event) => setEnterpriseKeyword(event.target.value)} value={enterpriseKeyword} />
        <DateRangeInput label="充值日期" onChange={setDateRange} value={dateRange} />
        <div className="admin-recharge-filter__actions">
          <Button icon={<Search size={16} />}>查询</Button>
          <Button onClick={resetFilters} variant="ghost">重置</Button>
        </div>
      </div>

      <div className="surface admin-recharge-table-card">
        <div className="ui-table-wrap">
          <table className="ui-table admin-recharge-table">
            <thead>
              <tr>
                <th style={{ width: '240px' }}>企业名称</th>
                <th style={{ width: '180px' }}>充值时间</th>
                <th style={{ width: '130px' }}>充值金额</th>
                <th style={{ width: '140px' }}>充值后余额</th>
                <th style={{ width: '120px' }}>充值类型</th>
                <th style={{ width: '300px' }}>备注</th>
              </tr>
            </thead>
            <tbody>
              {error ? (
                <tr><td className="ui-table__empty" colSpan={6}>{error}</td></tr>
              ) : loading ? (
                <tr><td className="ui-table__empty" colSpan={6}>正在加载真实充值记录...</td></tr>
              ) : filteredRows.length === 0 ? (
                <tr><td className="ui-table__empty" colSpan={6}>暂无真实充值记录</td></tr>
              ) : visibleRows.map((record) => {
                const tenantName = record.tenant?.name ?? tenants.find((tenant) => tenant.id === record.tenantId)?.name ?? record.tenantId;
                return (
                <tr key={record.id}>
                  <td><strong>{tenantName}</strong></td>
                  <td>{formatDateTime(record.paidAt ?? record.createdAt)}</td>
                  <td>¥{formatCents(record.amountCents)}</td>
                  <td>{record.balanceAfterCents === null || record.balanceAfterCents === undefined ? '-' : `¥${formatCents(record.balanceAfterCents)}`}</td>
                  <td><Tag tone="warning">人工充值</Tag></td>
                  <td><RemarkCell value={record.remark ?? undefined} /></td>
                </tr>
                );
              })}
            </tbody>
          </table>
        </div>

        <Pagination
          nextDisabled={currentPage >= totalPages}
          onNext={() => setPage((value) => Math.min(totalPages, value + 1))}
          onPrevious={() => setPage((value) => Math.max(1, value - 1))}
          page={currentPage}
          totalPages={totalPages}
          onPageChange={setPage}
          previousDisabled={currentPage <= 1}
          total={filteredRows.length}
        />
      </div>

      <ManualRechargeDialog
        initialTargetId={tenants.find((tenant) => tenant.status !== 'deleted')?.id}
        onClose={() => setManualOpen(false)}
        onCompleted={loadData}
        open={manualOpen}
        targets={tenants.filter((tenant) => tenant.status !== 'deleted').map((tenant) => ({
          id: tenant.id,
          name: tenant.name,
          code: tenant.code,
          balanceCents: accounts.find((account) => account.tenantId === tenant.id)?.balanceCents ?? 0,
        }))}
      />
    </section>
  );
}