import { Fragment, useEffect, useMemo, useState } from 'react';
import { FileText, Search, Smartphone } from 'lucide-react';
import { clientApi, type SmsMessageRecord } from '@/api/adminApi';
import {
  DateRangeInput,
  CarrierTag,
  Input,
  Pagination,
  QueryPanel,
  Select,
  Tag,
  type DateRangeValue,
} from '@/components/ui';
import { recentBeijingDateRange } from '@/utils/dateTime';

const statusLabelMap: Record<string, string> = {
  delivered: '成功',
  queued: '排队中',
  submitted: '已提交',
  accepted: '已受理',
  unknown: '未知',
  failed: '失败',
  rejected: '失败',
  timeout: '超时',
  pending_review: '待审核',
  scheduled: '等待定时发送',
  submit_queued: '等待提交',
  submit_failed: '提交失败',
  processing: '处理中',
  sending: '发送中',
  canceled: '已取消',
  cancelled: '已取消',
};

const statusToneMap: Record<string, 'success' | 'info' | 'danger' | 'neutral'> = {
  delivered: 'success',
  queued: 'info',
  submitted: 'info',
  accepted: 'info',
  unknown: 'neutral',
  failed: 'danger',
  rejected: 'danger',
  timeout: 'danger',
};

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

function getReceipt(record: SmsMessageRecord) {
  const latest = record.receiptRecords?.[0] as { rawStatus?: string; receiptStatus?: string; deliveredAt?: string } | undefined;
  return {
    status: receiptStatusLabel(latest?.rawStatus ?? latest?.receiptStatus ?? record.receiptStatus),
    time: latest?.deliveredAt ?? record.deliveredAt,
  };
}

function receiptStatusLabel(status?: string | null) {
  if (!status) return '-';
  const normalized = status.trim().toUpperCase();
  return {
    DELIVRD: '送达成功', ACCEPTD: '已受理', UNDELIV: '未送达', REJECTD: '已拒绝',
    EXPIRED: '已过期', DELETED: '已删除', UNKNOWN: '状态未知',
  }[normalized] ?? statusLabelMap[status.toLowerCase()] ?? '状态未知';
}

export function ClientSendDetailPage() {
  const [records, setRecords] = useState<SmsMessageRecord[]>([]);
  const [applicationId, setApplicationId] = useState('all');
  const [status, setStatus] = useState('all');
  const [dateRange, setDateRange] = useState<DateRangeValue>(() => recentBeijingDateRange(7));
  const [contentKeyword, setContentKeyword] = useState('');
  const [phoneKeyword, setPhoneKeyword] = useState('');
  const [page, setPage] = useState(1);
  const [total, setTotal] = useState(0);
  const [applications, setApplications] = useState<Array<{ id: string; name: string }>>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState('');

  function loadData(targetPage = page) {
    setLoading(true);
    clientApi.listMessages({
      applicationId: applicationId === 'all' ? undefined : applicationId,
      phoneNumber: phoneKeyword || undefined,
      status: status === 'all' ? undefined : status,
      contentKeyword: contentKeyword || undefined,
      queuedAtFrom: dateRange.start || undefined,
      queuedAtTo: dateRange.end || undefined,
      page: targetPage,
      pageSize: 10,
    })
      .then((result) => {
        setRecords(result.items);
        setTotal(result.total);
        setError('');
      })
      .catch((reason: Error) => setError(reason.message || '短信发送详情加载失败'))
      .finally(() => setLoading(false));
  }

  useEffect(() => {
    loadData(page);
  }, [applicationId, contentKeyword, dateRange.end, dateRange.start, page, phoneKeyword, status]);

  useEffect(() => {
    clientApi.listApplicationOptions()
      .then((items) => setApplications(items.map((item) => ({ id: item.id, name: item.name }))))
      .catch((reason: Error) => setError(reason.message || '应用列表加载失败'));
  }, []);

  const applicationOptions = useMemo(() => {
    return [
      { label: '全部应用', value: 'all' },
      ...applications.map((item) => ({ label: item.name, value: item.id })),
    ];
  }, [applications]);

  const filteredRows = records;
  const pageSize = 10;
  const totalPages = Math.max(1, Math.ceil(total / pageSize));
  const currentPage = Math.min(page, totalPages);
  const visibleRows = filteredRows;

  useEffect(() => {
    setPage(1);
  }, [applicationId, contentKeyword, dateRange.end, dateRange.start, phoneKeyword, status]);

  return (
    <section className="page-stack">
      <div className="sms-send-title">
        <span className="sms-send-title__icon">
          <FileText size={22} />
        </span>
        <h1>短信发送详情</h1>
      </div>

      <QueryPanel
        title="查询条件"
        summary={<>共找到 <strong>{total}</strong> 条发送记录</>}
      >
        <Select label="应用名称" onChange={(event) => setApplicationId(event.target.value)} options={applicationOptions} value={applicationId} />
        <DateRangeInput label="发送时间" onChange={setDateRange} value={dateRange} />
        <Select
          label="发送状态"
          onChange={(event) => setStatus(event.target.value)}
          options={[
            { label: '全部', value: 'all' },
            { label: '成功', value: 'delivered' },
            { label: '未知', value: 'unknown' },
            { label: '失败', value: 'failed' },
          ]}
          value={status}
        />
        <Input
          label="短信内容"
          onChange={(event) => setContentKeyword(event.target.value)}
          placeholder="输入关键词搜索"
          prefix={<Search size={16} />}
          value={contentKeyword}
        />
        <Input
          label="手机号码"
          onChange={(event) => setPhoneKeyword(event.target.value)}
          placeholder="输入手机号搜索"
          prefix={<Smartphone size={16} />}
          value={phoneKeyword}
        />
      </QueryPanel>

      {error ? <p className="form-error">{error}</p> : null}

      <div className="surface send-detail-table-card">
        <div className="ui-table-wrap">
          <table className="ui-table send-detail-table">
            <thead>
              <tr>
                <th style={{ width: '150px' }}>应用名称</th>
                <th style={{ width: '128px' }}>发送时间</th>
                <th style={{ width: '120px', textAlign: 'center' }}>字符数/条数</th>
                <th style={{ width: '130px' }}>手机号码</th>
                <th style={{ width: '120px' }}>所属运营商</th>
                <th style={{ width: '120px' }}>发送地区</th>
                <th style={{ width: '120px', textAlign: 'center' }}>发送状态</th>
                <th style={{ width: '120px', textAlign: 'center' }}>短信回执</th>
                <th style={{ width: '128px' }}>回执时间</th>
              </tr>
            </thead>
            <tbody>
              {loading ? (
                <tr><td className="ui-table__empty" colSpan={9}>正在加载真实发送记录...</td></tr>
              ) : filteredRows.length === 0 ? (
                <tr><td className="ui-table__empty" colSpan={9}>暂无发送记录</td></tr>
              ) : visibleRows.map((record) => {
                const receipt = getReceipt(record);
                const region = record.province ?? '-';
                return (
                  <Fragment key={record.id}>
                    <tr className="send-detail-main-row">
                      <td><strong className="send-detail-app-name">{record.application?.name ?? record.applicationId ?? '-'}</strong></td>
                      <td>
                        <span className="send-detail-time">
                          {record.queuedAt.slice(0, 10)}
                          <small>{record.queuedAt.slice(11, 19)}</small>
                        </span>
                      </td>
                      <td style={{ textAlign: 'center' }}>
                        <span className="send-detail-count">
                          <strong>{[...record.content].length}字</strong>
                          <small>{record.billingUnits}条</small>
                        </span>
                      </td>
                      <td><strong>{record.phoneNumber}</strong></td>
                      <td>{record.carrier ? <CarrierTag carrier={record.carrier} /> : '-'}</td>
                      <td><span className="send-detail-region">{region}</span></td>
                      <td style={{ textAlign: 'center' }}><Tag tone={statusToneMap[record.status] ?? 'info'}>{statusLabelMap[record.status] ?? '状态未知'}</Tag></td>
                      <td style={{ textAlign: 'center' }}><strong className="send-detail-receipt-code">{receipt.status}</strong></td>
                      <td>
                        {receipt.time ? (
                          <span className="send-detail-time">
                            {receipt.time.slice(0, 10)}
                            <small>{receipt.time.slice(11, 19)}</small>
                          </span>
                        ) : <span className="muted">-</span>}
                      </td>
                    </tr>
                    <tr className="send-detail-content-row">
                      <td colSpan={9}>
                        <div className="send-detail-content-block">
                          <span>短信内容</span>
                          <p>{record.content}</p>
                        </div>
                      </td>
                    </tr>
                  </Fragment>
                );
              })}
            </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={total}
        />
      </div>
    </section>
  );
}