import { useCallback, useEffect, useMemo, useState } from 'react';
import { AlertTriangle, CheckCircle2, Clock3, Eye, RefreshCw, Search } from 'lucide-react';
import { adminApi, type AdminChannel, type EnterpriseApplication, type ReceiptAnomaly } from '@/api/adminApi';
import { Button, Input, Modal, Pagination, Select, Table, Tag, type TableColumn } from '@/components/ui';

const anomalyTypeLabel: Record<string, string> = {
  aggregate_success_then_failure: '整条成功后又收到失败',
};

const statusLabel: Record<string, string> = {
  pending: '待处理',
  resolved: '已处理',
  ignored: '已忽略',
};

const statusTone: Record<string, 'neutral' | 'success' | 'warning' | 'danger'> = {
  pending: 'danger',
  resolved: 'success',
  ignored: 'neutral',
};

function formatTime(value?: string | null) {
  if (!value) return '-';
  const date = new Date(value);
  return Number.isNaN(date.getTime()) ? value : date.toLocaleString('zh-CN', { hour12: false });
}

function maskPhone(value?: string | null) {
  if (!value) return '-';
  return value.replace(/^(\d{3})\d{4}(\d{4})$/, '$1****$2');
}

function ReceiptAnomalyDetailModal({ record, onClose }: { record: ReceiptAnomaly; onClose: () => void }) {
  return (
    <Modal
      footer={<Button onClick={onClose} variant="ghost">关闭</Button>}
      onClose={onClose}
      open
      size="xl"
      title={<div className="template-modal-title"><h2>回执异常详情</h2><p>{record.messageRecord?.messageId ?? record.anomalyKey}</p></div>}
    >
      <div className="page-stack report-record-detail gateway-exception-detail">
        <div className="detail-grid">
          <div><span>异常类型</span><strong>{anomalyTypeLabel[record.anomalyType] ?? record.anomalyType}</strong></div>
          <div><span>处理状态</span><strong>{statusLabel[record.status] ?? record.status}</strong></div>
          <div><span>企业</span><strong>{record.tenant?.name ?? '-'}</strong></div>
          <div><span>应用</span><strong>{record.application?.name ?? '-'}</strong></div>
          <div><span>通道</span><strong>{record.channel?.name ?? '-'}</strong></div>
          <div><span>手机号</span><strong>{maskPhone(record.messageRecord?.phoneNumber)}</strong></div>
          <div><span>MessageId</span><strong>{record.messageRecord?.messageId ?? '-'}</strong></div>
          <div><span>SubmitId</span><strong>{record.submitRecord?.submitId ?? '-'}</strong></div>
          <div><span>原平台终态</span><strong>{record.previousStatus ?? '-'}</strong></div>
          <div><span>新回执状态</span><strong>{record.incomingStatus ?? '-'}</strong></div>
          <div><span>供应商原始状态</span><strong>{record.rawStatus ?? '-'}</strong></div>
          <div><span>错误码</span><strong>{record.errorCode ?? '-'}</strong></div>
          <div><span>首次发生</span><strong>{formatTime(record.firstOccurredAt)}</strong></div>
          <div><span>最近发生</span><strong>{formatTime(record.lastOccurredAt)}</strong></div>
          <div><span>重复次数</span><strong>{record.occurrenceCount}</strong></div>
          <div><span>原始回执 Msg_Id</span><strong>{record.receiptRecord?.gatewayMessageId ?? '-'}</strong></div>
          <div className="detail-grid__wide"><span>异常唯一键</span><strong>{record.anomalyKey}</strong></div>
          <div className="detail-grid__wide"><span>判定依据</span><strong>平台已根据整条级成功回执形成终态，同一提交尝试后续又收到明确失败回执。平台保留成功终态，不自动改写已推送给客户的结果。</strong></div>
        </div>
        <div className="gateway-exception-command">
          <div className="section-heading"><h3>结构化判定信息</h3><p className="page-inline-hint">供应商原始报文请到“系统日志 → 通讯交互日志”按 MessageId 或 Msg_Id 追溯。</p></div>
          <pre>{JSON.stringify(record.detail ?? {}, null, 2)}</pre>
        </div>
      </div>
    </Modal>
  );
}

export function ReceiptAnomalyPanel() {
  const [items, setItems] = useState<ReceiptAnomaly[]>([]);
  const [applications, setApplications] = useState<EnterpriseApplication[]>([]);
  const [channels, setChannels] = useState<AdminChannel[]>([]);
  const [summary, setSummary] = useState({ pending: 0, resolved: 0, ignored: 0, oldestPendingAt: null as string | null });
  const [keyword, setKeyword] = useState('');
  const [status, setStatus] = useState('all');
  const [anomalyType, setAnomalyType] = useState('all');
  const [applicationId, setApplicationId] = useState('all');
  const [channelId, setChannelId] = useState('all');
  const [page, setPage] = useState(1);
  const [total, setTotal] = useState(0);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState('');
  const [detail, setDetail] = useState<ReceiptAnomaly | null>(null);
  const pageSize = 10;

  useEffect(() => {
    Promise.all([adminApi.listEnterpriseApplications(), adminApi.listChannels()])
      .then(([appItems, channelItems]) => {
        setApplications(appItems);
        setChannels(channelItems.filter((item) => item.status !== 'deleted'));
      })
      .catch((failure: Error) => setError(failure.message || '筛选条件加载失败'));
  }, []);

  const loadData = useCallback(() => {
    setLoading(true);
    adminApi.listReceiptAnomalies({ keyword, status, anomalyType, applicationId, channelId, page, pageSize })
      .then((response) => {
        setItems(response.items);
        setTotal(response.total);
        setSummary({ ...response.summary, oldestPendingAt: response.summary.oldestPendingAt ?? null });
        setError('');
      })
      .catch((failure: Error) => {
        setItems([]);
        setTotal(0);
        setError(failure.message || '回执异常加载失败');
      })
      .finally(() => setLoading(false));
  }, [anomalyType, applicationId, channelId, keyword, page, status]);

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

  const columns = useMemo<Array<TableColumn<ReceiptAnomaly>>>(() => [
    { key: 'lastOccurredAt', title: '最近发生', width: '170px', render: (record) => formatTime(record.lastOccurredAt) },
    { key: 'messageId', title: '消息编号', width: '180px', render: (record) => <strong className="admin-task-id">{record.messageRecord?.messageId ?? '-'}</strong> },
    { key: 'tenant', title: '企业 / 应用', width: '190px', render: (record) => <div><strong>{record.tenant?.name ?? '-'}</strong><small className="table-cell-note">{record.application?.name ?? '-'}</small></div> },
    { key: 'channel', title: '通道', width: '170px', render: (record) => <div>{record.channel?.name ?? '-'}<small className="table-cell-note">{record.channel?.code ?? '-'}</small></div> },
    { key: 'type', title: '异常类型', render: (record) => <div><strong>{anomalyTypeLabel[record.anomalyType] ?? record.anomalyType}</strong><small className="table-cell-note">{record.previousStatus ?? '-'} → {record.incomingStatus ?? '-'}</small></div> },
    { key: 'count', title: '次数', width: '70px', align: 'center', render: (record) => record.occurrenceCount },
    { key: 'status', title: '状态', width: '100px', render: (record) => <Tag tone={statusTone[record.status] ?? 'neutral'}>{statusLabel[record.status] ?? record.status}</Tag> },
    { key: 'actions', title: '操作', width: '90px', align: 'right', render: (record) => <Button icon={<Eye size={14} />} onClick={() => setDetail(record)} size="sm" variant="ghost">详情</Button> },
  ], []);

  const totalPages = Math.max(1, Math.ceil(total / pageSize));
  return (
    <div className="page-stack admin-sms-task-page report-record-page">
      <div className="page-heading">
        <div><h2>回执异常</h2><p className="page-inline-hint">展示供应商回执与平台已确定终态互相矛盾的数据，例如整条级成功后又收到同一提交尝试的失败回执。此处保存异常判定和处理状态；真实回执在回执表，原始 CMPP 报文在通讯交互日志。</p></div>
        <Button icon={<RefreshCw size={16} />} onClick={loadData} variant="secondary">刷新</Button>
      </div>
      {error ? <p className="form-error">{error}</p> : null}
      <div className="dashboard-grid">
        <div className="surface mini-status-card"><AlertTriangle size={22} /><div><span>待处理</span><strong>{summary.pending}</strong><small>需要核对供应商回执口径。</small></div></div>
        <div className="surface mini-status-card"><Clock3 size={22} /><div><span>最早待处理</span><strong className="gateway-exception-time">{formatTime(summary.oldestPendingAt)}</strong><small>长时间未核对应优先处理。</small></div></div>
        <div className="surface mini-status-card"><CheckCircle2 size={22} /><div><span>已处理</span><strong>{summary.resolved}</strong><small>已完成供应商或业务核对。</small></div></div>
        <div className="surface mini-status-card"><RefreshCw size={22} /><div><span>异常总数</span><strong>{total}</strong><small>当前筛选条件下的记录。</small></div></div>
      </div>
      <div className="surface admin-task-filter">
        <Input label="消息编号 / 状态码" onChange={(event) => { setKeyword(event.target.value); setPage(1); }} placeholder="MessageId、SubmitId、原始状态" value={keyword} />
        <Select label="状态" options={[{ label: '全部状态', value: 'all' }, { label: '待处理', value: 'pending' }, { label: '已处理', value: 'resolved' }, { label: '已忽略', value: 'ignored' }]} value={status} onChange={(event) => { setStatus(event.target.value); setPage(1); }} />
        <Select label="异常类型" options={[{ label: '全部类型', value: 'all' }, { label: '整条成功后又收到失败', value: 'aggregate_success_then_failure' }]} value={anomalyType} onChange={(event) => { setAnomalyType(event.target.value); setPage(1); }} />
        <Select label="应用" options={[{ label: '全部应用', value: 'all' }, ...applications.map((item) => ({ label: item.name, value: item.id }))]} value={applicationId} onChange={(event) => { setApplicationId(event.target.value); setPage(1); }} />
        <Select label="通道" options={[{ label: '全部通道', value: 'all' }, ...channels.map((item) => ({ label: item.name, value: item.id }))]} value={channelId} onChange={(event) => { setChannelId(event.target.value); setPage(1); }} />
        <div className="admin-task-filter__actions"><Button icon={<Search size={16} />} onClick={loadData}>查询</Button></div>
      </div>
      <div className="surface admin-task-table-card report-task-table-card">
        <div className="section-heading gateway-exception-list-heading"><div><h2>回执异常记录</h2><p className="page-inline-hint">详情仅展示结构化判定信息，不用它替代原始通讯报文。</p></div><Tag tone="warning">{total} 条</Tag></div>
        <Table columns={columns} data={items} emptyText={loading ? '加载中...' : '暂无回执异常'} pagination={false} rowKey="id" />
        <Pagination total={total} page={page} totalPages={totalPages} onPageChange={setPage} previousDisabled={page <= 1} nextDisabled={page >= totalPages} onPrevious={() => setPage((current) => Math.max(1, current - 1))} onNext={() => setPage((current) => Math.min(totalPages, current + 1))} />
      </div>
      {detail ? <ReceiptAnomalyDetailModal record={detail} onClose={() => setDetail(null)} /> : null}
    </div>
  );
}