/**
 * MatchPredictPanel: 预测弹窗全套(过程可视化 / 结果版面 / 专家意见)。
 *
 * D3: 从 Matches.tsx 拆出,渲染逻辑原样搬迁。对外只导出 PredictModal;
 * PredictionPanel 复用 Prediction 的 embedded 模式由弹窗内渲染。
 */
import { useEffect, useState } from 'react'
import TeamSideTag from '../../../components/TeamSideTag'
import type { Match, Prediction } from '../types'
import { AGENT_LABELS } from '../types'
import { AgentsPanel } from './AgentsPanel'
import { OutcomePanel } from './OutcomePanel'
import { ReasoningPanel } from './ReasoningPanel'

function Spinner({ className = '' }: { className?: string }) {
  return (
    <svg
      viewBox="0 0 20 20"
      className={`h-3.5 w-3.5 animate-spin ${className}`}
      fill="none"
      aria-hidden="true"
    >
      <circle cx="10" cy="10" r="7.5" stroke="currentColor" strokeWidth="1.5" strokeOpacity="0.25" />
      <path d="M17.5 10A7.5 7.5 0 0010 2.5" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" />
    </svg>
  )
}

/** 胜平负一行文字:选中的红字加方块标记,未选中的退灰 */
.**
 * P3-1:PredictionPanel 不再自绘,改为组合三个子组件:
 *   OutcomePanel(比分/胜平负/成本) / AgentsPanel(专家意见) / ReasoningPanel(终裁/降级)。
 * 渲染输出与拆分前完全一致(仅降级警示 + 报头 + 元信息仍在此处)。
 */
function PredictionPanel({
  prediction,
  match,
  embedded = false,
}: {
  prediction: Prediction
  match: Match
  /** 弹窗嵌入模式:弹窗已提供报头,这里省略自带版头 */
  embedded?: boolean
}) {
  const homeName = match.home_team_zh || match.home_team
  const awayName = match.away_team_zh || match.away_team
  const degraded = prediction.status === 'degraded' || prediction.status === 'failed'
  const reports = prediction.agent_outputs ?? []
  const okReports = reports.filter(r => r.status === 'ok')

  return (
    <article className={embedded ? 'bg-paper-50' : 'border border-ink-900 bg-paper-50'}>
      {!embedded && (
      <div className="flex flex-wrap items-baseline justify-between gap-2 border-b border-ink-900 bg-paper-100 px-4 py-2.5 sm:px-5">
        <h3 className="flex flex-wrap items-center gap-1.5 font-serif text-sm font-bold text-ink-900">
          预测版 ·
          <TeamSideTag side="home" />
          {homeName}
          <span>对</span>
          <TeamSideTag side="away" />
          {awayName}
        </h3>
        <span className="text-2xs tabular-nums text-ink-500">
          {prediction.provider} / {prediction.model}
          {prediction.latency_ms !== null && ` · ${(prediction.latency_ms / 1000).toFixed(1)}s`}
        </span>
      </div>
      )}

      <div className="space-y-7 px-4 py-6 sm:px-5">
        {degraded && (
          <div className="border-l-2 border-press bg-press-wash/40 px-4 py-3">
            <p className="font-serif text-sm font-bold text-press-dark">
              {prediction.status === 'failed' ? '预测失败' : '预测降级(degraded)'}
            </p>
            <p className="mt-1.5 whitespace-pre-wrap text-xs leading-relaxed text-ink-600">
              {prediction.reasoning || '所有专家均无有效数据或调用失败,无法生成可靠比分。'}
            </p>
          </div>
        )}

        {!degraded && <OutcomePanel prediction={prediction} match={match} />}

        <p className="text-center text-2xs text-ink-500">
          `多专家模式 · ${okReports.length}/${reports.length} 路有效`
          {prediction.prompt_version && ` · prompt ${prediction.prompt_version}`}
        </p>

        <AgentsPanel prediction={prediction} />

        <ReasoningPanel prediction={prediction} />
      </div>
    </article>
  )
}

function PredictProgress() {
  const [elapsed, setElapsed] = useState(0)
  useEffect(() => {
    const t = setInterval(() => setElapsed(e => e + 0.5), 500)
    return () => clearInterval(t)
  }, [])

  // 阶段阈值(秒): 切片 → 专家(各路依次点亮) → 终裁
  const SLICE_END = 3
  const AGENT_START = 4
  const AGENT_STEP = 8        // 每路专家约 8s 点亮一路
  const AGG_START = AGENT_START + AGENT_STEP * 5
  const agents = ['form', 'stats', 'home_away', 'standings', 'h2h']

  const phase = elapsed < SLICE_END ? 'slice'
    : elapsed < AGG_START ? 'agents' : 'agg'

  const pct = Math.min(95, Math.round((elapsed / 70) * 100))

  return (
    <div className="px-5 py-8 sm:px-8">
      {/* 阶段标题 */}
      <div className="flex items-center justify-center gap-2">
        <Spinner className="text-press" />
        <span className="font-serif text-sm font-bold text-ink-900">
          {phase === 'slice' && '正在组装比赛数据切片'}
          {phase === 'agents' && '五路专家并行分析中'}
          {phase === 'agg' && '终裁专家汇总裁定中'}
        </span>
        <span className="text-2xs tabular-nums text-ink-400">{elapsed.toFixed(0)}s</span>
      </div>

      {/* 进度条:渐进式,不封顶到 100% */}
      <div className="mx-auto mt-5 h-1 w-full max-w-md overflow-hidden bg-ink-100" role="progressbar" aria-valuenow={pct}>
        <div
          className={`h-full bg-press transition-all duration-500 ${phase === 'agg' ? 'animate-pulse' : ''}`}
          style={{ width: `${pct}%` }}
        />
      </div>

      {/* 专家灯序(多专家模式) */}
      <ul className="mx-auto mt-6 max-w-md space-y-1.5">
          {agents.map((a, i) => {
            const lit = elapsed >= AGENT_START + AGENT_STEP * (i + 1)
            const activeNow = !lit && elapsed >= AGENT_START + AGENT_STEP * i
            return (
              <li
                key={a}
                className={`flex items-center justify-between border-b border-ink-200 pb-1.5 text-xs transition-colors ${
                  lit ? 'text-ink-800' : activeNow ? 'text-ink-900' : 'text-ink-300'
                }`}
              >
                <span className="flex items-center gap-2">
                  <span
                    aria-hidden="true"
                    className={`inline-block h-1.5 w-1.5 ${lit ? 'bg-ink-900' : activeNow ? 'bg-press animate-pulse' : 'bg-ink-200'}`}
                  />
                  {AGENT_LABELS[a] ?? a}
                </span>
                {lit && <span className="text-2xs text-ink-400">✓ 完成</span>}
                {activeNow && <span className="text-2xs text-press">分析中…</span>}
              </li>
            )
          })}
        </ul>

      <p className="mt-6 text-center text-2xs text-ink-400">
        五路专家并行分析后终裁,约需 30-90 秒;多专家调用消耗较多 token,请按需使用。关闭窗口即取消
      </p>
      <p className="mt-1 text-center text-2xs text-ink-300">
        提示:每分钟限 10 次预测,耗尽后需等待下一分钟。
      </p>
    </div>
  )
}
export function PredictModal({
  match,
  predicting,
  prediction,
  error,
  onClose,
}: {
  match: Match
  predicting: boolean
  prediction: Prediction | null
  error: string | null
  onClose: () => void
}) {
  const homeName = match.home_team_zh || match.home_team
  const awayName = match.away_team_zh || match.away_team

  useEffect(() => {
    const h = (e: KeyboardEvent) => {
      if (e.key === 'Escape') onClose()
    }
    document.addEventListener('keydown', h)
    return () => document.removeEventListener('keydown', h)
  }, [onClose])

  return (
    <div
      className="fixed inset-0 z-50 flex items-start justify-center overflow-y-auto bg-ink-900/50 p-4 sm:items-center"
      role="dialog"
      aria-modal="true"
      aria-label={`预测 ${homeName} 对 ${awayName}`}
      onClick={e => {
        if (e.target === e.currentTarget) onClose()
      }}
    >
      <div className="relative flex max-h-[92vh] w-full max-w-2xl flex-col overflow-hidden bg-paper-50 shadow-2xl">
        {/* 弹窗报头 */}
        <div className="flex flex-shrink-0 items-center justify-between border-b border-ink-900 bg-paper-100 px-4 py-2.5 sm:px-5">
          <h3 className="flex flex-wrap items-center gap-1.5 font-serif text-sm font-bold text-ink-900">
            预测版 ·
            <TeamSideTag side="home" />
            {homeName}
            <span>对</span>
            <TeamSideTag side="away" />
            {awayName}
          </h3>
          <button
            onClick={onClose}
            className="flex h-11 w-11 flex-shrink-0 items-center justify-center text-ink-400 transition-colors hover:text-ink-900"
            aria-label="关闭"
          >
            <svg className="h-4 w-4" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
              <path d="M6.3 5.3a1 1 0 011.4 0L10 7.6l2.3-2.3a1 1 0 111.4 1.4L11.4 9l2.3 2.3a1 1 0 01-1.4 1.4L10 10.4l-2.3 2.3a1 1 0 01-1.4-1.4L8.6 9 6.3 6.7a1 1 0 010-1.4z" />
            </svg>
          </button>
        </div>

        {/* 弹窗体(小屏可滚动) */}
        <div className="flex-1 overflow-y-auto">
        {predicting ? (
          <PredictProgress />
        ) : error ? (
          <div className="px-5 py-10 text-center sm:px-8">
            <p className="font-serif text-sm font-bold text-press">预测失败</p>
            <p className="mx-auto mt-3 max-w-md whitespace-pre-wrap text-left text-xs leading-relaxed text-ink-600">
              {error}
            </p>
            <button onClick={onClose} className="btn btn-sm mt-6">关闭</button>
          </div>
        ) : prediction ? (
          <PredictionPanel prediction={prediction} match={match} embedded />
        ) : null}
        </div>
      </div>
    </div>
  )
}