/**
 * Admin 后台 - 数据采集页面(报刊风)
 *
 * 响应式布局: 移动端单列,桌面端双列
 */

import { useEffect, useState, useCallback } from 'react'
import { triggerCollection, fetchLeagues } from '../dal'
import type { CollectionRequest, League } from '../types'
import { Card, CardBody, CardHeader, Badge, SectionHeader, Alert, Spinner } from '../components'

const SOURCES = [
  { value: 'bzzoiro', label: 'Bzzoiro', desc: '历史赛程与比分' },
  { value: 'understat', label: 'Understat', desc: 'xG 进阶数据' },
  { value: 'injuries', label: 'Injuries', desc: '球员伤停' },
] as const

/** 把采集接口返回摘要成一两行可读文字 */
function summarizeResult(res: any, source: string): { title: string; detail: string } {
  if (res && typeof res === 'object') {
    if (source === 'bzzoiro' && ('total_inserted' in res || 'total_updated' in res)) {
      return {
        title: `采集完成:新增 ${res.total_inserted ?? 0} 条,更新 ${res.total_updated ?? 0} 条`,
        detail: Array.isArray(res.errors) && res.errors.length > 0 ? res.errors.join('\n') : '',
      }
    }
    if ('count' in res || 'updated' in res) {
      const parts = [
        `新增 ${res.count ?? 0}`,
        `更新 ${res.updated ?? 0}`,
        `跳过 ${res.skipped ?? 0}`,
        `未匹配 ${res.unmatched ?? 0}`,
      ]
      return {
        title: `采集完成:${parts.join(' / ')}`,
        detail: Array.isArray(res.errors) && res.errors.length > 0 ? res.errors.join('\n') : '',
      }
    }
  }
  return { title: '采集完成', detail: JSON.stringify(res)?.slice(0, 300) ?? '' }
}

export default function CollectionPage() {
  const [leagues, setLeagues] = useState<League[]>([])
  const [source, setSource] = useState<string>('bzzoiro')
  const [leagueCode, setLeagueCode] = useState('')
  const [dateFrom, setDateFrom] = useState('')
  const [dateTo, setDateTo] = useState('')
  const [season, setSeason] = useState('')
  const [loading, setLoading] = useState(false)
  const [error, setError] = useState<string | null>(null)
  const [result, setResult] = useState<{ title: string; detail: string } | null>(null)

  const loadLeagues = useCallback(async () => {
    const lg = await fetchLeagues()
    setLeagues(lg)
  }, [])

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

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault()
    setError(null)
    setResult(null)
    setLoading(true)

    try {
      const body: CollectionRequest = {
        source: source as CollectionRequest['source'],
        leagues: leagueCode ? [leagueCode] : undefined,
        league: leagueCode || undefined,
        season: season || undefined,
        date_from: dateFrom || undefined,
        date_to: dateTo || undefined,
      }
      const res = await triggerCollection(body)
      setResult(summarizeResult(res, source))
    } catch (err: unknown) {
      setError(err instanceof Error ? err.message : '采集触发失败')
    } finally {
      setLoading(false)
    }
  }

  return (
    <div className="space-y-6">
      <SectionHeader
        title="数据采集"
        description="触发数据源采集,支持联赛筛选和日期范围。采集为同步执行,大范围日期耗时较长。"
      />

      <div className="grid gap-6 lg:grid-cols-2">
        {/* 采集表单 */}
        <Card>
          <CardHeader title="新建采集任务" />
          <CardBody>
            <form onSubmit={handleSubmit} className="space-y-4">
              {/* 数据源选择 */}
              <div>
                <label className="mb-1.5 block text-xs text-ink-500">数据源</label>
                <select
                  value={source}
                  onChange={e => setSource(e.target.value)}
                  className="field w-full"
                >
                  {SOURCES.map(s => (
                    <option key={s.value} value={s.value}>
                      {s.label} — {s.desc}
                    </option>
                  ))}
                </select>
              </div>

              {/* 联赛选择 */}
              <div>
                <label className="mb-1.5 block text-xs text-ink-500">联赛</label>
                <select
                  value={leagueCode}
                  onChange={e => setLeagueCode(e.target.value)}
                  className="field w-full"
                >
                  <option value="">全部联赛</option>
                  {leagues.map(l => (
                    <option key={l.code} value={l.code}>{l.name_zh || l.name}</option>
                  ))}
                </select>
              </div>

              {/* Understat 专用: 赛季 */}
              {source === 'understat' && (
                <div>
                  <label className="mb-1.5 block text-xs text-ink-500">赛季(起始年)</label>
                  <input
                    type="number"
                    value={season}
                    onChange={e => setSeason(e.target.value)}
                    placeholder="2025"
                    className="field w-full"
                  />
                </div>
              )}

              {/* 日期范围 */}
              {source !== 'injuries' && (
                <div className="grid grid-cols-1 gap-3 sm:grid-cols-2">
                  <div>
                    <label className="mb-1.5 block text-xs text-ink-500">起始日期</label>
                    <input
                      type="date"
                      value={dateFrom}
                      onChange={e => setDateFrom(e.target.value)}
                      className="field w-full"
                    />
                  </div>
                  <div>
                    <label className="mb-1.5 block text-xs text-ink-500">结束日期</label>
                    <input
                      type="date"
                      value={dateTo}
                      onChange={e => setDateTo(e.target.value)}
                      className="field w-full"
                    />
                  </div>
                </div>
              )}

              {/* 消息提示 */}
              {error && <Alert kind="error" title="采集失败" message={error} onClose={() => setError(null)} />}
              {result && (
                <Alert
                  kind="ok"
                  title={result.title}
                  message={result.detail || undefined}
                  onClose={() => setResult(null)}
                />
              )}

              {/* 提交按钮 */}
              <button type="submit" disabled={loading} className="btn btn-solid w-full">
                {loading ? (<><Spinner /> 采集中</>) : '触发采集'}
              </button>
            </form>
          </CardBody>
        </Card>

        {/* 数据源说明 */}
        <Card>
          <CardHeader title="数据源说明" />
          <CardBody>
            <div className="space-y-3">
              {SOURCES.map(s => (
                <div key={s.value} className="border-b border-ink-200 px-1 py-3 last:border-b-0">
                  <div className="flex items-center gap-3">
                    <Badge status="info">{s.label}</Badge>
                    <p className="text-xs text-ink-600">{s.desc}</p>
                  </div>
                </div>
              ))}
            </div>

            <p className="mt-4 border-l-2 border-ink-300 pl-3 text-2xs leading-relaxed text-ink-500">
              若后端配置了 ADMIN_API_KEY,采集接口需要管理员密钥。
              遇到 401 请到「系统配置」页填写密钥。
            </p>
          </CardBody>
        </Card>
      </div>
    </div>
  )
}