import React, { useEffect, useState } from 'react';
import Dialog from '@mui/material/Dialog';
import { createTheme, ThemeProvider } from '@mui/material/styles';
import Avatar from './battle-dialog/Avatar';
import StatRow from './battle-dialog/StatRow';
import BonusPoints from './battle-dialog/BonusPoints';

const darkTheme = createTheme({ palette: { mode: 'dark' } });

const DIALOG_SX = {
  '& .MuiDialog-paper': {
    background: '#07090d',
    backgroundImage: `
      linear-gradient(rgba(35, 111, 135, 0.08) 1px, transparent 1px),
      linear-gradient(90deg, rgba(35, 111, 135, 0.08) 1px, transparent 1px)
    `,
    backgroundSize: '46px 46px',
    border: '1px solid rgba(35, 111, 135, 0.4)',
    borderRadius: '12px',
    boxShadow: '0 0 80px rgba(35, 111, 135, 0.15), 0 32px 80px rgba(0,0,0,0.9)',
    width: '580px',
    maxWidth: '94vw',
    overflow: 'hidden',
    color: '#fff',
  },
  '& .MuiBackdrop-root': {
    background: 'rgba(2, 4, 8, 0.88)',
    backdropFilter: 'blur(4px)',
  },
};

const RESULT_META = {
  win: {
    label: 'Victory',
    color: '#5ee89a',
    bg: 'rgba(42,158,96,0.15)',
    border: 'rgba(42,158,96,0.4)',
    icon: 'fa-trophy',
  },
  loss: {
    label: 'Defeated',
    color: '#f67d52',
    bg: 'rgba(173,10,5,0.15)',
    border: 'rgba(173,10,5,0.4)',
    icon: 'fa-flag',
  },
  draw: {
    label: 'Draw',
    color: '#95cff5',
    bg: 'rgba(149,207,245,0.1)',
    border: 'rgba(149,207,245,0.3)',
    icon: 'fa-minus',
  },
};

export default function BattleDialog({ games }) {
  const [open, setOpen] = useState(false);
  const [game, setGame] = useState(null);
  const [copied, setCopied] = useState(false);

  useEffect(() => {
    const handler = e => {
      const row = e.target.closest('[data-game-index]');
      if (!row) return;
      const idx = parseInt(row.dataset.gameIndex, 10);
      if (!isNaN(idx) && games[idx]) {
        setGame(games[idx]);
        setOpen(true);
      }
    };
    document.addEventListener('click', handler);
    return () => document.removeEventListener('click', handler);
  }, [games]);

  if (!game) {
    return <ThemeProvider theme={darkTheme}><Dialog open={false} sx={DIALOG_SX} /></ThemeProvider>;
  }

  const meta = RESULT_META[game.result] ?? RESULT_META.draw;
  const resign = game.resign;
  const endReason = resign
    ? `${resign.charAt(0).toUpperCase() + resign.slice(1)} resigned`
    : 'Points';
  const shareUrl = `${window.location.origin}/battle/${game.uuid}`;

  const formatDuration = (from, to) => {
    if (!from || !to) return null;
    const diffMs = new Date(to.replace(' ', 'T')) - new Date(from.replace(' ', 'T'));
    if (isNaN(diffMs) || 0 >= diffMs) return null;
    const totalSec = Math.floor(diffMs / 1000);
    const h = Math.floor(totalSec / 3600);
    const m = Math.floor((totalSec % 3600) / 60);
    const s = totalSec % 60;
    if (0 < h) return `${h}h ${m}m ${s}s`;
    if (0 < m) return `${m}m ${s}s`;
    return `${s}s`;
  };
  const duration = formatDuration(game.created, game.date);
  const pointDiff = Math.abs((game.redPoints ?? 0) - (game.bluePoints ?? 0));
  const winnerColor = (game.redPoints ?? 0) > (game.bluePoints ?? 0) ? '#f67d52'
    : (game.bluePoints ?? 0) > (game.redPoints ?? 0) ? '#95cff5'
      : 'rgba(255,255,255,0.45)';

  const handleShare = () => {
    navigator.clipboard.writeText(shareUrl).then(() => {
      setCopied(true);
      setTimeout(() => setCopied(false), 2200);
    });
  };

  return (
    <ThemeProvider theme={darkTheme}>
      <Dialog open={open} onClose={() => setOpen(false)} sx={DIALOG_SX}>
        <div className="bd">
          <div className="bd-header">
            <div className="bd-header-left">
              <span className="bd-label">Battle Report</span>
              <h2 className="bd-title">
                <i className="fa fa-crosshairs" /> Match Details
              </h2>
            </div>
            <div style={{ display: 'flex', gap: 8 }}>
              <button
                className={`bd-share${copied ? ' bd-share--copied' : ''}`}
                onClick={handleShare}
                aria-label="Copy share link"
                title="Copy share link"
              >
                <i className={`fa ${copied ? 'fa-check' : 'fa-share-alt'}`} />
                {copied ? 'Copied!' : 'Share'}
              </button>
              <button className="bd-close" onClick={() => setOpen(false)} aria-label="Close">
                <i className="fa fa-times" />
              </button>
            </div>
          </div>
          <div className="bd-vs-panel">
            <Avatar
              name={game.redName} color="red" avatarUrl={game.redAvatar}
              bonusPoints={game.redBonusPoints > game.blueBonusPoints ? game.redBonusPoints : 0}
            />
            <div className="bd-vs-center">
              <div className="bd-vs-score">
                <span className="bd-vs-score__red">{game.redPoints ?? '—'}</span>
                <span className="bd-vs-score__sep">:</span>
                <span className="bd-vs-score__blue">{game.bluePoints ?? '—'}</span>
              </div>
              <div className="bd-vs-score" style={{ marginBottom: 8 }}>
                <span style={{
                  font: '700 13px \'Rajdhani\', sans-serif',
                  color: '#f67d52',
                  display: 'flex',
                  alignItems: 'center',
                  gap: 4,
                }}
                >
                  <i className="fa fa-star" style={{ fontSize: 11 }} /> {(game.redBonusPoints ?? 0).toFixed(1)}
                </span>
                <span className="bd-vs-score__sep">:</span>
                <span style={{
                  font: '700 13px \'Rajdhani\', sans-serif',
                  color: '#95cff5',
                  display: 'flex',
                  alignItems: 'center',
                  gap: 4,
                }}
                >
                  {(game.blueBonusPoints ?? 0).toFixed(1)} <i className="fa fa-star" style={{ fontSize: 11 }} />
                </span>
              </div>
              <div className="bd-vs-label">VS</div>
              <div
                className="bd-result-badge"
                style={{ background: meta.bg, border: `1px solid ${meta.border}`, color: meta.color }}
              >
                <i className={`fa ${meta.icon}`} /> {meta.label}
              </div>
            </div>
            <Avatar
              name={game.blueName} color="blue" avatarUrl={game.blueAvatar}
              bonusPoints={game.blueBonusPoints > game.redBonusPoints ? game.blueBonusPoints : 0}
            />
          </div>
          <div className="bd-stats">
            <StatRow icon="fa-calendar" label="Date" value={game.date ?? '—'} />
            {game.created && game.date && game.created !== game.date && (
              <StatRow icon="fa-clock" label="Started" value={game.created} />
            )}
            {duration && (
              <StatRow icon="fa-hourglass-half" label="Match duration" value={duration} />
            )}
            <StatRow icon="fa-flag-checkered" label="End reason" value={endReason} />
            {0 < pointDiff && (
              <StatRow
                icon="fa-balance-scale" label="Winning margin"
                value={`${pointDiff} mine${1 === pointDiff ? '' : 's'}`} valueColor={winnerColor}
              />
            )}
            <StatRow
              icon="fa-bomb" label="Red used bomb"
              value={game.redExplodedBomb ? 'Yes' : 'No'}
              valueColor={game.redExplodedBomb ? '#f67d52' : 'rgba(255,255,255,0.45)'}
            />
            <StatRow
              icon="fa-bomb" label="Blue used bomb"
              value={game.blueExplodedBomb ? 'Yes' : 'No'}
              valueColor={game.blueExplodedBomb ? '#95cff5' : 'rgba(255,255,255,0.45)'}
            />
          </div>
          <BonusPoints
            game={game}
          />
        </div>
      </Dialog>
    </ThemeProvider>
  );
}