/**
 * Admin 后台 - 数据管线管理页(报刊风)
 *
 * 功能:
 * - 采集失败记录列表(可重试)
 * - 数据质量检查结果
 * - 手动触发质量检查
 */

import { useEffect, useState, useCallback } from 'react'
import {
  fetchDataQuality,
  runDataQualityCheck,
  fetchIngestFailures,
  retryIngestFailure,
} from '../dal'
import type { IngestFailureItem, DataQualityCheckItem } from '../dal'
import { Card, CardBody, CardHeader, Badge, SectionHeader, Alert, Spinner } from '../components'

export default function DataPipelinePage() {
  const [quality, setQuality] = useState<{ failures: IngestFailureItem[]; checks: DataQualityCheckItem[] } | null>(null)
  const [failures, setFailures] = useState<IngestFailureItem[]>([])
  const [loading, setLoading] = useState(true)
  const [running, setRunning] = useState(false)
  const [error, setError] = useState<string | null>(null)
  const [notice, setNotice] = useState<{ ok: boolean; text: string } | null>(null)

  const load = useCallback(async () => {
    setLoading(true)
    setError(null)
    try {
      const [q, f] = await Promise.all([fetchDataQuality(), fetchIngestFailures()])
      setQuality(q)
      setFailures(f)
    } catch (err) {
      setError(err instanceof Error ? err.message : '加载失败')
    } finally {
      setLoading(false)
    }
  }, [])

  useEffect(() => { load() }, [load])

  const handleRunCheck = async () => {
    setRunning(true)
    setNotice(null)
    try {
      const res = await runDataQualityCheck()
      const failed = res.checks.filter(c => !c.passed)
      setNotice({
        ok: failed.length === 0,
        text: failed.length === 0
          ? '数据质量检查通过'
          : `检查完成: ${failed.length} 项未通过`,
      })
      await load()
    } catch {
      setNotice({ ok: false, text: '质量检查执行失败' })
    } finally {
      setRunning(false)
    }
  }

  const handleRetry = async (id: number) => {
    setNotice(null)
    try {
      const res = await retryIngestFailure(id)
      setNotice({ ok: true, text: res.message })
      await load()
    } catch {
      setNotice({ ok: false, text: '重试操作失败' })
    }
  }

  const pendingFailures = failures.filter(f => f.status === 'pending' || f.status === 'retrying')

  return (
    <div className="space-y-6">
      <SectionHeader
        title="数据管线"
        description="采集失败重试、数据质量检查与监控"
        action={
          <button onClick={handleRunCheck} disabled={running} className="btn btn-sm">
            {running ? <><Spinner /> 检查中</> : '运行质量检查'}
          </button>
        }
      />

      {notice && (
        <Alert kind={notice.ok ? 'ok' : 'error'} title={notice.text} onClose={() => setNotice(null)} />
      )}

      {error && <Alert kind="error" title="加载失败" message={error} onClose={() => setError(null)} />}

      {loading && (
        <div className="flex justify-center py-12"><Spinner /></div>
      )}

      {!loading && (
        <>
          {/* 采集失败记录 */}
          <Card>
            <CardHeader
              title="采集失败记录"
              description={pendingFailures.length > 0 ? `${pendingFailures.length} 条待处理` : '暂无待处理失败记录'}
            />
            <CardBody className="px-0 sm:px-0">
              {failures.length === 0 ? (
                <p className="py-8 text-center text-xs text-ink-400">暂无采集失败记录</p>
              ) : (
                <div className="overflow-x-auto">
                  <table className="w-full min-w-[640px] text-sm">
                    <thead>
                      <tr className="border-b border-ink-200 text-left text-ink-500">
                        <th className="px-4 py-2 font-medium">来源</th>
                        <th className="px-4 py-2 font-medium">实体类型</th>
                        <th className="px-4 py-2 font-medium">错误类型</th>
                        <th className="px-4 py-2 font-medium">重试次数</th>
                        <th className="px-4 py-2 font-medium">状态</th>
                        <th className="px-4 py-2 font-medium">操作</th>
                      </tr>
                    </thead>
                    <tbody>
                      {failures.map(f => (
                        <tr key={f.id} className="border-b border-ink-100 hover:bg-paper-100">
                          <td className="px-4 py-2 text-xs text-ink-700">{f.source}</td>
                          <td className="px-4 py-2 text-xs text-ink-600">{f.entity_type}</td>
                          <td className="px-4 py-2 text-xs text-ink-600">{f.error_type}</td>
                          <td className="px-4 py-2 text-xs tabular-nums text-ink-500">{f.retry_count}</td>
                          <td className="px-4 py-2">
                            <Badge status={f.status === 'resolved' ? 'success' : f.status === 'pending' ? 'warning' : 'info'}>
                              {f.status}
                            </Badge>
                          </td>
                          <td className="px-4 py-2">
                            {(f.status === 'pending' || f.status === 'retrying') && (
                              <button onClick={() => handleRetry(f.id)} className="btn btn-sm">
                                重试
                              </button>
                            )}
                          </td>
                        </tr>
                      ))}
                    </tbody>
                  </table>
                </div>
              )}
            </CardBody>
          </Card>

          {/* 数据质量检查 */}
          <Card>
            <CardHeader title="数据质量检查" description="最近 20 条检查结果" />
            <CardBody className="px-0 sm:px-0">
              {quality?.checks.length === 0 ? (
                <p className="py-8 text-center text-xs text-ink-400">暂无质量检查记录,点击右上角「运行质量检查」触发</p>
              ) : (
                <div className="overflow-x-auto">
                  <table className="w-full min-w-[560px] text-sm">
                    <thead>
                      <tr className="border-b border-ink-200 text-left text-ink-500">
                        <th className="px-4 py-2 font-medium">检查项</th>
                        <th className="px-4 py-2 font-medium">实体</th>
                        <th className="px-4 py-2 font-medium">结果</th>
                        <th className="px-4 py-2 font-medium">严重度</th>
                        <th className="px-4 py-2 font-medium">时间</th>
                      </tr>
                    </thead>
                    <tbody>
                      {quality?.checks.map(c => (
                        <tr key={c.id} className="border-b border-ink-100 hover:bg-paper-100">
                          <td className="px-4 py-2 text-xs text-ink-700">{c.check_name}</td>
                          <td className="px-4 py-2 text-xs text-ink-600">{c.entity_type}</td>
                          <td className="px-4 py-2">
                            <Badge status={c.passed ? 'success' : 'error'}>
                              {c.passed ? '通过' : '未通过'}
                            </Badge>
                          </td>
                          <td className="px-4 py-2">
                            <Badge status={c.severity === 'warning' ? 'warning' : c.severity === 'error' ? 'error' : 'info'}>
                              {c.severity}
                            </Badge>
                          </td>
                          <td className="px-4 py-2 text-2xs text-ink-400">
                            {c.checked_at ? new Date(c.checked_at).toLocaleString('zh-CN', { hour12: false }) : '—'}
                          </td>
                        </tr>
                      ))}
                    </tbody>
                  </table>
                </div>
              )}
            </CardBody>
          </Card>
        </>
      )}
    </div>
  )
}