import React, { useEffect, useRef, useState } from 'react';
import type { BattleResult } from '../types';

interface BattleModalProps {
  battle: BattleResult | null;
  onClose: () => void;
}

export const BattleModal: React.FC<BattleModalProps> = ({ battle, onClose }) => {
  const [countdown, setCountdown] = useState(5);
  const [progressPercent, setProgressPercent] = useState(100);

  // Keep onClose in a ref to decouple the timer effect from callback identity changes
  const onCloseRef = useRef(onClose);
  useEffect(() => {
    onCloseRef.current = onClose;
  });

  // Unique battle key so the 5s timer only restarts when a genuinely new battle arrives
  const battleKey = battle
    ? `${battle.winner_party_id}_${battle.defeated_party_id}_${battle.party1_total_score}_${battle.party2_total_score}_${battle.killed_leader_id}`
    : null;

  useEffect(() => {
    if (!battleKey) {
      setCountdown(5);
      setProgressPercent(100);
      return;
    }

    const DURATION_MS = 5000;
    const targetEndTime = Date.now() + DURATION_MS;
    setCountdown(5);
    setProgressPercent(100);

    const timer = window.setInterval(() => {
      const now = Date.now();
      const remainingMs = targetEndTime - now;

      if (remainingMs <= 0) {
        window.clearInterval(timer);
        setCountdown(0);
        setProgressPercent(0);
        onCloseRef.current();
        return;
      }

      const seconds = Math.ceil(remainingMs / 1000);
      const percent = Math.min(100, Math.max(0, (remainingMs / DURATION_MS) * 100));
      setCountdown(seconds);
      setProgressPercent(percent);
    }, 100);

    return () => {
      window.clearInterval(timer);
    };
  }, [battleKey]);

  if (!battle) return null;

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/80 backdrop-blur-md p-4 animate-in fade-in duration-200">
      <div className="bg-slate-900 border-2 border-amber-500/80 rounded-2xl w-full max-w-xl shadow-2xl p-6 relative overflow-hidden">
        {/* Glowing cyber header banner */}
        <div className="absolute top-0 left-0 right-0 h-2 bg-gradient-to-r from-amber-500 via-rose-500 to-sky-500" />

        {/* 5-second automatic progress bar */}
        <div className="absolute top-2 left-0 right-0 h-1 bg-slate-800">
          <div
            className="h-full bg-amber-400 transition-all duration-100 ease-linear"
            style={{ width: `${progressPercent}%` }}
          />
        </div>

        <div className="flex items-center justify-between mb-4 pb-2 border-b border-slate-800 mt-1">
          <div className="flex items-center gap-2">
            <span className="text-2xl">⚔️</span>
            <div>
              <h2 className="text-base font-bold text-slate-100 font-mono tracking-wide">
                PARTY ENGAGEMENT: 3-BOUT D20 CLASH
              </h2>
              <p className="text-xs text-slate-400">
                {battle.party1_name} vs {battle.party2_name}
              </p>
            </div>
          </div>
          <button
            onClick={() => onCloseRef.current()}
            className="text-slate-400 hover:text-slate-200 p-1 text-sm font-mono"
            title="Dismiss now"
          >
            ✕
          </button>
        </div>

        {/* 3 Bouts Breakdown */}
        <div className="space-y-3 mb-5">
          {battle.bouts.map((bout) => (
            <div
              key={bout.bout_number}
              className="bg-slate-950/80 border border-slate-800 rounded-xl p-3 text-xs font-mono"
            >
              <div className="flex justify-between items-center mb-2 pb-1 border-b border-slate-800/80">
                <span className="text-amber-400 font-bold">BOUT #{bout.bout_number}</span>
                <span className="text-slate-300">
                  Winner: <strong className="text-emerald-400">{bout.winner_name || 'Tied'}</strong>
                </span>
              </div>

              <div className="grid grid-cols-2 gap-4">
                {/* Party 1 */}
                <div className="p-2 rounded-lg bg-slate-900/90 border border-slate-800">
                  <div className="text-slate-400 font-semibold truncate mb-1">
                    {battle.party1_name}
                  </div>
                  <div className="flex items-center justify-between text-slate-300">
                    <span>
                      Str: {bout.party1_strength} × 🎲 {bout.party1_roll} =
                    </span>
                    <strong className="text-sm text-sky-400">{bout.party1_score}</strong>
                  </div>
                </div>

                {/* Party 2 */}
                <div className="p-2 rounded-lg bg-slate-900/90 border border-slate-800">
                  <div className="text-slate-400 font-semibold truncate mb-1">
                    {battle.party2_name}
                  </div>
                  <div className="flex items-center justify-between text-slate-300">
                    <span>
                      Str: {bout.party2_strength} × 🎲 {bout.party2_roll} =
                    </span>
                    <strong className="text-sm text-sky-400">{bout.party2_score}</strong>
                  </div>
                </div>
              </div>
            </div>
          ))}
        </div>

        {/* Battle Resolution Summary */}
        <div className="bg-amber-950/20 border border-amber-500/40 rounded-xl p-4 text-xs font-mono space-y-2 mb-5">
          <div className="flex items-center justify-between text-sm font-bold">
            <span className="text-amber-300 flex items-center gap-1.5">
              <span>🏆</span> VICTORY: {battle.winner_party_name}
            </span>
            <span className="text-slate-400 text-xs font-normal">
              Bouts: {battle.party1_bouts_won} - {battle.party2_bouts_won}
            </span>
          </div>

          <div className="text-slate-300 leading-relaxed">
            • Winning Leader <strong className="text-amber-300">{battle.winner_leader_name}</strong> receives{' '}
            <span className="text-emerald-400 font-bold">+2 points</span>, and all other winning squad members receive{' '}
            <span className="text-emerald-400 font-bold">+1 point</span>!
          </div>

          <div className="text-slate-300 leading-relaxed">
            • Defeated Leader <strong className="text-rose-400">{battle.killed_leader_name}</strong> receives{' '}
            <span className="text-rose-400 font-bold">-1 point</span>.
            {battle.absorbed_members.includes(battle.killed_leader_id) ? (
              <span> Resistance broken! Surrendered and <strong className="text-sky-300">joined {battle.winner_party_name}</strong>.</span>
            ) : (
              <span> Respawned at ({battle.killed_leader_respawn_position.x}, {battle.killed_leader_respawn_position.y}).</span>
            )}
          </div>

          {battle.absorbed_members.length > 0 && !battle.absorbed_members.includes(battle.killed_leader_id) && (
            <div className="text-slate-300 leading-relaxed">
              • <strong className="text-emerald-400">{battle.absorbed_members.length} surviving bot(s)</strong> from the
              defeated party surrendered and <strong className="text-sky-300">joined {battle.winner_party_name}</strong>!
            </div>
          )}

          <div className="text-slate-400 text-[11px] pt-1">
            New Squad Size: <strong className="text-slate-200">{battle.new_party_size} bots</strong> • Total Strength:{' '}
            <strong className="text-amber-400">{battle.new_party_strength}</strong>
          </div>
        </div>

        {/* Continue Button with 5s Auto-close Countdown */}
        <button
          onClick={() => onCloseRef.current()}
          className="w-full bg-amber-500 hover:bg-amber-400 text-slate-950 font-bold py-2.5 rounded-xl text-xs font-mono transition-all shadow-lg shadow-amber-500/20 flex items-center justify-center gap-2"
        >
          <span>Acknowledge & Continue Battle</span>
          <span className="bg-amber-950 text-amber-300 px-2 py-0.5 rounded-full text-[11px] font-mono">
            Auto-closing in {countdown}s
          </span>
        </button>
      </div>
    </div>
  );
};