import { useEffect, useMemo, useState } from 'react';
import { adminApi, type SmsMessageRecord, type SmsMessageSegmentAudit } from '@/api/adminApi';
import { Breadcrumb, type DateRangeValue } from '@/components/ui';
import { SendDetailModal } from './sms-records/SendDetailModal';
import { SmsRecordFilter } from './sms-records/SmsRecordFilter';
import { SmsRecordList } from './sms-records/SmsRecordList';
import { defaultSmsRecordDateRange } from './sms-records/smsRecordModel';
import type { ApplicationOption, MessageFilters, TenantOption } from './sms-records/smsRecordTypes';
import './sms-records/AdminSmsRecordsPage.css';

const pageSize = 25;

export function AdminSmsRecordsPage() {
  const [records, setRecords] = useState<SmsMessageRecord[]>([]);
  const [enterprise, setEnterprise] = useState('all');
  const [application, setApplication] = useState('all');
  const [dateRange, setDateRange] = useState<DateRangeValue>(defaultSmsRecordDateRange);
  const [phoneKeyword, setPhoneKeyword] = useState('');
  const [contentKeyword, setContentKeyword] = useState('');
  const [channelKeyword, setChannelKeyword] = useState('');
  const [carrier, setCarrier] = useState('all');
  const [status, setStatus] = useState('all');
  const [selectedRecord, setSelectedRecord] = useState<SmsMessageRecord | null>(null);
  const [segmentAudits, setSegmentAudits] = useState<SmsMessageSegmentAudit[]>([]);
  const [segmentLoading, setSegmentLoading] = useState(false);
  const [error, setError] = useState('');
  const [page, setPage] = useState(1);
  const [total, setTotal] = useState(0);
  const [loading, setLoading] = useState(false);
  const [filterTenants, setFilterTenants] = useState<TenantOption[]>([]);
  const [filterApplications, setFilterApplications] = useState<ApplicationOption[]>([]);

  function currentFilters(): MessageFilters {
    return {
      tenantId: enterprise === 'all' ? undefined : enterprise,
      applicationId: application === 'all' ? undefined : application,
      phoneNumber: phoneKeyword || undefined,
      contentKeyword: contentKeyword || undefined,
      channelKeyword: channelKeyword || undefined,
      carrier: carrier === 'all' ? undefined : carrier,
      queuedAtFrom: dateRange.start,
      queuedAtTo: dateRange.end,
      status: status === 'all' ? undefined : status,
    };
  }

  function loadData(filters = currentFilters(), targetPage = page) {
    setLoading(true);
    adminApi.listOperationMessages({ ...filters, page: targetPage, pageSize })
      .then((result) => {
        setRecords(result.items);
        setTotal(result.total);
        setSelectedRecord((current) => current ? result.items.find((item) => item.id === current.id) ?? null : null);
        setError('');
      })
      .catch((failure: Error) => setError(failure.message || '短信记录加载失败'))
      .finally(() => setLoading(false));
  }

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

  useEffect(() => {
    Promise.all([adminApi.listTenants(), adminApi.listEnterpriseApplicationOptions()])
      .then(([tenants, applications]) => {
        setFilterTenants(tenants
          .filter((item) => item.status !== 'deleted')
          .map((item) => ({ id: item.id, name: item.name })));
        setFilterApplications(applications
          .filter((item) => item.status !== 'deleted')
          .map((item) => ({ id: item.id, tenantId: item.tenantId, name: item.name })));
      })
      .catch((failure: Error) => setError(failure.message || '短信记录筛选项加载失败'));
  }, []);

  useEffect(() => {
    if (!selectedRecord) {
      setSegmentAudits([]);
      return;
    }
    setSegmentLoading(true);
    adminApi.listMessageSegmentAudits({ messageRecordId: selectedRecord.id })
      .then((items) => {
        setSegmentAudits(items);
        setError('');
      })
      .catch((failure: Error) => setError(failure.message || '分片审计加载失败'))
      .finally(() => setSegmentLoading(false));
  }, [selectedRecord]);

  const enterpriseOptions = useMemo(
    () => [{ label: '全部企业', value: 'all' }, ...filterTenants.map((item) => ({ label: item.name, value: item.id }))],
    [filterTenants],
  );

  const applicationOptions = useMemo(
    () => [{ label: '全部应用', value: 'all' }, ...filterApplications
      .filter((item) => enterprise === 'all' || item.tenantId === enterprise)
      .map((item) => ({ label: item.name, value: item.id }))],
    [enterprise, filterApplications],
  );

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

  function resetFilters() {
    const defaultDateRange = defaultSmsRecordDateRange();
    setEnterprise('all');
    setApplication('all');
    setDateRange(defaultDateRange);
    setPhoneKeyword('');
    setContentKeyword('');
    setChannelKeyword('');
    setCarrier('all');
    setStatus('all');
    if (page !== 1) setPage(1);
    else loadData({ queuedAtFrom: defaultDateRange.start, queuedAtTo: defaultDateRange.end }, 1);
  }

  async function exportRecords() {
    try {
      const blob = await adminApi.exportOperationMessages(currentFilters());
      const url = URL.createObjectURL(blob);
      const anchor = document.createElement('a');
      anchor.href = url;
      anchor.download = `sms-records-${new Date().toISOString().slice(0, 10)}.csv`;
      anchor.click();
      URL.revokeObjectURL(url);
    } catch (failure) {
      setError(failure instanceof Error ? failure.message : '短信记录导出失败');
    }
  }

  return (
    <section className="page-stack admin-sms-records-page">
      <div className="page-heading">
        <div>
          <Breadcrumb items={['数据详单', '短信记录']} />
          <h1>短信记录</h1>
        </div>
      </div>
      {error ? <p className="form-error">{error}</p> : null}

      <SmsRecordFilter
        application={application}
        applicationOptions={applicationOptions}
        carrier={carrier}
        channelKeyword={channelKeyword}
        contentKeyword={contentKeyword}
        dateRange={dateRange}
        enterprise={enterprise}
        enterpriseOptions={enterpriseOptions}
        phoneKeyword={phoneKeyword}
        status={status}
        onApplicationChange={setApplication}
        onCarrierChange={setCarrier}
        onChannelKeywordChange={setChannelKeyword}
        onContentKeywordChange={setContentKeyword}
        onDateRangeChange={setDateRange}
        onEnterpriseChange={(value) => {
          setEnterprise(value);
          setApplication('all');
        }}
        onPhoneKeywordChange={setPhoneKeyword}
        onQuery={() => {
          if (page !== 1) setPage(1);
          else loadData(currentFilters(), 1);
        }}
        onReset={resetFilters}
        onStatusChange={setStatus}
      />

      <SmsRecordList
        currentPage={currentPage}
        loading={loading}
        records={records}
        total={total}
        totalPages={totalPages}
        onExport={() => void exportRecords()}
        onOpenDetail={setSelectedRecord}
        onPageChange={setPage}
      />

      {selectedRecord ? (
        <SendDetailModal
          onClose={() => setSelectedRecord(null)}
          record={selectedRecord}
          segmentAudits={segmentAudits}
          segmentLoading={segmentLoading}
        />
      ) : null}
    </section>
  );
}