import { Check, TrendingUp, X } from 'lucide-react';
import { useEffect, useState } from 'react';
import { Match } from '../api/client';
import styles from './MatchCard.module.css';

interface Props {
  match: Match;
  onTip: () => void;
}

type CardState = 'open' | 'tipped' | 'live' | 'finished' | 'missed';

function getCardState(match: Match): CardState {
  if (match.status === 'IN_PLAY' || match.status === 'PAUSED') return 'live';
  if (match.status === 'FINISHED') {
    return match.userTip ? 'finished' : 'missed';
  }
  // SCHEDULED or TIMED
  return match.userTip ? 'tipped' : 'open';
}

function useCountdown(minutesUntilKickoff: number) {
  const [remaining, setRemaining] = useState(minutesUntilKickoff);

  useEffect(() => {
    if (minutesUntilKickoff > 60) return; // only active for <1h
    setRemaining(minutesUntilKickoff);
    const interval = setInterval(() => {
      setRemaining(r => Math.max(0, r - 1 / 60));
    }, 1000);
    return () => clearInterval(interval);
  }, [minutesUntilKickoff]);

  return remaining;
}

const STATUS_LABELS: Record<string, string> = {
  SCHEDULED: 'Geplant',
  TIMED: 'Terminiert',
  IN_PLAY: 'Live',
  PAUSED: 'Pause',
  FINISHED: 'Beendet',
  POSTPONED: 'Verschoben',
  CANCELLED: 'Abgesagt',
};

function formatKickoff(utcDate: string): string {
  return new Date(utcDate).toLocaleString('de-DE', {
    hour: '2-digit', minute: '2-digit', timeZone: 'Europe/Berlin',
  });
}

function FlagBox({ crest, name }: { crest: string | null; name: string }) {
  return (
    <div className={styles.flagBox}>
      {crest
        ? <img className={styles.crest} src={crest} alt={name} />
        : <span style={{ fontSize: 18 }}>🏳️</span>
      }
    </div>
  );
}

export default function MatchCard({ match, onTip }: Props) {
  const state = getCardState(match);
  const remaining = useCountdown(match.minutesUntilKickoff);
  const remainingMins = Math.ceil(remaining);

  const isFinished = state === 'finished' || state === 'missed';
  const isLive = state === 'live';
  const hasTip = !!match.userTip;
  const points = match.userTip?.points ?? null;

  const resultClass =
    points === 3 ? styles.exact :
    points === 1 ? styles.tendency :
    (points === 0 && isFinished) ? styles.wrong : '';

  const glowClass =
    isFinished && points === 3 ? styles.glowExact :
    isFinished && points === 1 ? styles.glowTendency :
    isFinished && points === 0 ? styles.glowWrong : '';

  return (
    <div className={`card ${styles.card} ${styles[`card_${state}`]} ${isLive ? styles.live : ''} ${glowClass}`}>

      {/* Top row: Status/Group */}
      <div className={styles.topRow}>
        {(isLive || isFinished) && (
          <span className={`${styles.status} ${isLive ? styles.statusLive : ''}`}>
            {isLive && <span className={styles.liveDot} />}
            {STATUS_LABELS[match.status] ?? match.status}
          </span>
        )}
        {match.group && (
          <span className={styles.group}>
            {match.group.replace('GROUP_', 'Gruppe ')}
          </span>
        )}
      </div>

      {/* Kickoff — stadium LED display, centered */}
      {!isFinished && !isLive && (
        <div className={styles.kickoffRow}>
          <span className={styles.kickoffLED}>{formatKickoff(match.utcDate)}</span>
        </div>
      )}

      {/* Countdown badge — left-aligned */}
      {(state === 'open' || state === 'tipped') && match.tippable && (
        <div className={styles.countdownRow}>
          <span className={`${styles.countdownBadge} ${remainingMins < 60 ? styles.countdownUrgent : ''}`}>
            {match.minutesUntilKickoff < 60
              ? `Noch ${remainingMins} Min!`
              : (() => {
                  const h = Math.floor(match.minutesUntilKickoff / 60);
                  if (h < 24) return `in ${h}h`;
                  const d = Math.floor(h / 24);
                  return `in ${d} Tag${d > 1 ? 'en' : ''}`;
                })()
            }
          </span>
        </div>
      )}

      {/* Teams + Score */}
      <div className={styles.matchRow}>
        {/* Home */}
        <div className={styles.teamHome}>
          <FlagBox crest={match.homeTeam.crest} name={match.homeTeam.name} />
          <span className={styles.teamName}>{match.homeTeam.shortName}</span>
        </div>

        {/* Center: Score or VS separator */}
        <div className={styles.scoreBox}>
          {isFinished || isLive ? (
            <div className={styles.scoreStack}>
              <span className={styles.score}>
                {match.score.home ?? '–'}&nbsp;:&nbsp;{match.score.away ?? '–'}
              </span>
              {isLive && hasTip && (
                <span className={styles.liveTipCompare}>
                  Tipp: {match.userTip!.home}:{match.userTip!.away}
                </span>
              )}
            </div>
          ) : (
            <span className={styles.vsSeparator}>–</span>
          )}
        </div>

        {/* Away */}
        <div className={styles.teamAway}>
          <FlagBox crest={match.awayTeam.crest} name={match.awayTeam.name} />
          <span className={styles.teamName}>{match.awayTeam.shortName}</span>
        </div>
      </div>

      {/* Tipp area — wird zum farbigen Banner wenn Punkte ausgewertet */}
      <div className={`${styles.tipRow} ${hasTip && points !== null ? `${styles.resultBanner} ${resultClass}` : ''}`}>
        {state === 'missed' ? (
          /* ── Missed: no tip, match finished ── */
          <span className={styles.missedLabel}>Nicht getippt</span>
        ) : state === 'live' ? (
          /* ── Live: no tip input, locked ── */
          hasTip ? (
            <div className={styles.tipDisplay}>
              <div className={styles.tipLeft} />
              <div className={styles.tipCenter}>
                <span className={styles.tipLabel}>DEIN TIPP</span>
                <span className={styles.tipScore}>
                  {match.userTip!.home} : {match.userTip!.away}
                </span>
              </div>
              <div className={styles.tipRight} />
            </div>
          ) : (
            <span className={styles.noTip}>Kein Tipp abgegeben</span>
          )
        ) : hasTip ? (
          points !== null ? (
            /* ── Auswertungs-Banner ── */
            <div className={styles.tipDisplay}>
              {/* Links: Icon + Ergebnis-Label nebeneinander, zentriert zur Tippbox */}
              <div className={`${styles.tipLeft} ${styles.bannerLeft}`}>
                <span className={styles.resultIcon}>
                  {points === 3 ? <Check size={14} strokeWidth={3} /> :
                   points === 1 ? <TrendingUp size={14} strokeWidth={2.5} /> :
                   <X size={14} strokeWidth={3} />}
                </span>
                <span className={styles.resultLabel}>
                  {points === 3 ? 'Exakt' : points === 1 ? 'Tendenz' : 'Falsch'}
                </span>
              </div>

              {/* Mitte: nur Score, kein Label */}
              <div className={styles.tipCenter}>
                <span className={styles.tipScoreBanner}>
                  {match.userTip!.home} : {match.userTip!.away}
                </span>
              </div>

              {/* Rechts: Punkte */}
              <div className={styles.tipRight}>
                <span className={`${styles.pointsBadge} ${
                  points === 3 ? styles.pointsBadge_exact :
                  points === 1 ? styles.pointsBadge_tendency :
                  styles.pointsBadge_wrong
                }`}>
                  {points === 0 ? '0 Pkt.' : `+${points} Pkt.`}
                </span>
              </div>
            </div>
          ) : (
            /* ── Tipp vorhanden, noch nicht ausgewertet (tipped state) ── */
            <div className={styles.tippedRow} onClick={match.tippable ? onTip : undefined}>
              <span className={styles.tippedIcon}>✓</span>
              <span className={styles.tippedLabel}>Dein Tipp</span>
              <span className={styles.tippedScore}>{match.userTip!.home} : {match.userTip!.away}</span>
              {match.tippable && <span className={styles.tippedEdit}>Ändern</span>}
            </div>
          )
        ) : match.tippable ? (
          <button className={`btn-primary ${styles.tipBtn}`} onClick={onTip}>
            Tipp abgeben
          </button>
        ) : (
          <span className={styles.noTip}>Kein Tipp abgegeben</span>
        )}
      </div>
    </div>
  );
}