/**
 * OutcomePanel: 预测主结论 —— 比分 / 胜平负 / 置信度 / 成本。
 *
 * P3-1: 从 MatchPredictPanel.PredictionPanel 拆出,渲染逻辑原样搬迁。
 */
import TeamSideTag from '../../../components/TeamSideTag'
import type { Match, Prediction } from '../types'
import { OUTCOME_LABEL } from '../types'

/** 置信度细线:0~1 数值的低调可视化 */
function Meter({ value }: { value: number }) {
  const pct = Math.max(0, Math.min(100, Math.round(value * 100)))
  return (
    <div className="h-px w-full bg-ink-200" role="presentation">
      <div className="h-px bg-press transition-[width] duration-500" style={{ width: `${pct}%` }} />
    </div>
  )
}

/** 胜平负一行文字:选中的红字加方块标记,未选中的退灰 */
function OutcomeLine({
  pick,
  confidence,
}: {
  pick: string | null
  confidence: number | null
}) {
  const options = ['1', 'X', '2'] as const
  return (
    <div>
      <div className="flex items-baseline justify-center gap-6 sm:gap-10">
        {options.map(o => {
          const on = pick === o
          return (
            <div key={o} className="flex flex-col items-center gap-1">
              <span className={`flex items-center gap-1.5 text-sm ${on ? 'font-semibold text-press' : 'text-ink-400'}`}>
                {on && <span className="inline-block h-2 w-2 bg-press" aria-hidden="true" />}
                {OUTCOME_LABEL[o]}
              </span>
              {on && confidence !== null && (
                <span className="text-2xs tabular-nums text-ink-500">
                  置信 {Math.round(confidence * 100)}%
                </span>
              )}
            </div>
          )
        })}
      </div>
      {pick && confidence !== null && (
        <div className="mx-auto mt-3 max-w-xs">
          <Meter value={confidence} />
          <p className="mt-1 text-center text-2xs text-ink-400">主观置信度,非统计概率</p>
        </div>
      )}
    </div>
  )
}

/** 预测成本展示:耗时 + token + 限流余量 */
function PredictionCost({ prediction }: { prediction: Prediction }) {
  const latency = prediction.latency_ms != null ? `${(prediction.latency_ms / 1000).toFixed(1)}s` : null
  const tokens = prediction.prompt_tokens != null || prediction.completion_tokens != null
    ? `${prediction.prompt_tokens ?? '?'}/${prediction.completion_tokens ?? '?'}`
    : null

  if (!latency && !tokens && prediction.rate_limit_remaining == null) return null

  return (
    <div className="border-t border-ink-200 pt-3 text-2xs text-ink-500">
      <div className="flex flex-wrap items-center justify-center gap-x-4 gap-y-1">
        {latency && (
          <span className="inline-flex items-center gap-1">
            <span aria-hidden="true" className="opacity-60">⏱</span>耗时 {latency}
          </span>
        )}
        {tokens && (
          <span className="inline-flex items-center gap-1">
            <span aria-hidden="true" className="opacity-60">Tok</span>prompt/completion: {tokens}
          </span>
        )}
        {prediction.rate_limit_remaining != null && prediction.rate_limit_remaining <= 3 && (
          <span className="text-press" title="每分钟最多 10 次预测">
            剩余配额: {prediction.rate_limit_remaining}/10(分钟)
          </span>
        )}
      </div>
    </div>
  )
}

export function OutcomePanel({ prediction, match }: { prediction: Prediction; match: Match }) {
  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'

  return (
    <>
      {!degraded && (
        <div className="text-center">
          <p className="font-serif text-5xl font-bold tabular-nums leading-none text-ink-900 sm:text-6xl">
            {prediction.pred_home_goals ?? '-'}
            <span className="mx-3 font-normal text-ink-300">:</span>
            {prediction.pred_away_goals ?? '-'}
          </p>
          <p className="mt-3 text-2xs tracking-[0.5em] text-ink-400">预测比分</p>
          {prediction.alt_pred_home_goals != null && prediction.alt_pred_away_goals != null && (
            <p className="mt-2 text-2xs tabular-nums text-ink-400">
              备选{' '}
              <span className="font-serif text-sm font-bold tabular-nums text-ink-600">
                {prediction.alt_pred_home_goals}<span className="mx-0.5 font-normal text-ink-300">:</span>{prediction.alt_pred_away_goals}
              </span>
            </p>
          )}
        </div>
      )}

      {!degraded && (
        <div className="border-y border-ink-200 py-4">
          <OutcomeLine pick={prediction.pred_1x2} confidence={prediction.subjective_confidence} />
        </div>
      )}

      {!degraded && <PredictionCost prediction={prediction} />}
    </>
  )
}