import { useEffect, useMemo, useState } from 'react';
import { ChevronLeft, ChevronRight, Plus, Search } from 'lucide-react';
import { Breadcrumb, Button, DateRangeInput, Input, Modal, Select, Textarea, Tag, type DateRangeValue } from '@/components/ui';
import { adminApi, type AccountTransaction, type RechargeOrder, type TenantAccount, type TenantOption } from '@/api/adminApi';

type ManualRechargeForm = {
  tenantId: string;
  amount: string;
  smsUnits: string;
  operator: string;
  remark: string;
};

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

function formatAmount(value?: number) {
  if (value === undefined) {
    return '';
  }

  return value.toLocaleString('zh-CN', {
    maximumFractionDigits: 2,
    minimumFractionDigits: Number.isInteger(value) ? 0 : 2,
  });
}

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 [accounts, setAccounts] = useState<TenantAccount[]>([]);
  const [transactions, setTransactions] = useState<AccountTransaction[]>([]);
  const [tenants, setTenants] = useState<TenantOption[]>([]);
  const [enterpriseKeyword, setEnterpriseKeyword] = useState('');
  const [dateRange, setDateRange] = useState<DateRangeValue>({});
  const [manualOpen, setManualOpen] = useState(false);
  const [form, setForm] = useState<ManualRechargeForm>({ tenantId: '', amount: '', smsUnits: '0', operator: '运营', remark: '' });
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState('');

  async function loadData() {
    setLoading(true);
    setError('');
    try {
      const [nextTenants, nextRecords, nextAccounts, nextTransactions] = await Promise.all([
        adminApi.listTenants(),
        adminApi.listManualRecharges(),
        adminApi.listAccounts(),
        adminApi.listTransactions(),
      ]);
      setTenants(nextTenants);
      setRecords(nextRecords);
      setAccounts(nextAccounts);
      setTransactions(nextTransactions);
      setForm((current) => ({ ...current, tenantId: current.tenantId || nextTenants[0]?.id || '' }));
    } 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],
  );

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

  function updateForm<K extends keyof ManualRechargeForm>(key: K, value: ManualRechargeForm[K]) {
    setForm((current) => ({ ...current, [key]: value }));
  }

  async function submitManualRecharge() {
    const amount = Number(form.amount);
    const smsUnits = Number(form.smsUnits || 0);
    if (!form.tenantId || !Number.isFinite(amount) || amount <= 0 || !Number.isFinite(smsUnits) || smsUnits < 0) {
      return;
    }
    await adminApi.createManualRecharge({
      tenantId: form.tenantId,
      amountCents: Math.round(amount * 100),
      smsUnits,
      remark: [form.operator, form.remark].filter(Boolean).join(' / '),
    });
    await loadData();
    setManualOpen(false);
    setForm({ tenantId: tenants[0]?.id ?? '', amount: '', smsUnits: '0', operator: '运营', remark: '' });
  }

  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: '140px' }}>操作人</th>
                <th style={{ width: '300px' }}>备注</th>
              </tr>
            </thead>
            <tbody>
              {error ? (
                <tr><td className="ui-table__empty" colSpan={7}>{error}</td></tr>
              ) : loading ? (
                <tr><td className="ui-table__empty" colSpan={7}>正在加载真实充值记录...</td></tr>
              ) : filteredRows.length === 0 ? (
                <tr><td className="ui-table__empty" colSpan={7}>暂无真实充值记录</td></tr>
              ) : filteredRows.map((record) => {
                const account = accounts.find((item) => item.tenantId === record.tenantId);
                const transaction = transactions.find((item) => item.relatedId === record.id);
                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>{new Date(record.paidAt ?? record.createdAt).toLocaleString('zh-CN')}</td>
                  <td>{formatAmount(record.amountCents / 100)}</td>
                  <td>{formatAmount((transaction?.balanceAfter ?? account?.balanceCents ?? 0) / 100)}</td>
                  <td><Tag tone="warning">人工充值</Tag></td>
                  <td>{record.operatorId || '运营'}</td>
                  <td><RemarkCell value={record.remark ?? undefined} /></td>
                </tr>
                );
              })}
            </tbody>
          </table>
        </div>

        <div className="admin-recharge-pagination">
          <Select options={[{ label: '10条/页', value: '10' }, { label: '20条/页', value: '20' }]} value="10" />
          <div>
            <Button icon={<ChevronLeft size={16} />} iconOnly variant="ghost">上一页</Button>
            <Button size="sm" variant="ghost">24</Button>
            <Button size="sm">25</Button>
            <Button size="sm" variant="ghost">26</Button>
            <span>...</span>
            <Button size="sm" variant="ghost">63</Button>
            <Button icon={<ChevronRight size={16} />} iconOnly variant="ghost">下一页</Button>
          </div>
        </div>
      </div>

      {manualOpen ? (
        <Modal
          footer={(
            <>
              <Button onClick={() => setManualOpen(false)} variant="ghost">取消</Button>
              <Button onClick={submitManualRecharge}>确认充值</Button>
            </>
          )}
          onClose={() => setManualOpen(false)}
          open
          size="md"
          title="企业人工充值"
        >
          <div className="admin-system-modal-form">
            <Select
              label="企业名称"
              onChange={(event) => updateForm('tenantId', event.target.value)}
              options={tenants.map((tenant) => ({ label: tenant.name, value: tenant.id }))}
              value={form.tenantId}
            />
            <Input label="充值金额" onChange={(event) => updateForm('amount', event.target.value)} prefix="¥" type="number" value={form.amount} />
            <Input label="短信条数" onChange={(event) => updateForm('smsUnits', event.target.value)} type="number" value={form.smsUnits} />
            <Input label="操作人" onChange={(event) => updateForm('operator', event.target.value)} value={form.operator} />
            <Textarea className="admin-system-modal-form__wide" label="充值备注" onChange={(event) => updateForm('remark', event.target.value)} rows={4} value={form.remark} />
          </div>
        </Modal>
      ) : null}
    </section>
  );
}