import { $audio, $copyRoomCode, $leaveRoom, $nameDisplay, $nameLobby, $npArtist, $npTitle, $npYear, $pauseBtn, $placeBtn, $readyChk, $roomId, $roomCode, $slotSelect, $startGame, $volumeSlider, $playBtn, $nextBtn, $createRoom, $joinRoom, $lobby, $room, $setNameLobby, $guessTitle, $guessArtist, $answerResult } from './dom.js';
import { state } from './state.js';
import { connectWS, sendMsg } from './ws.js';
import { renderRoom } from './render.js';
import { initAudioUI, applySync } from './audio.js';

function showToast(msg) {
  const el = document.getElementById('toast');
  if (!el) {
    return;
  }
  el.textContent = msg;
  el.style.opacity = '1';
  setTimeout(() => {
    el.style.opacity = '0';
  }, 1200);
}

function handleConnected(msg) {
  state.playerId = msg.playerId;
  const stored = localStorage.getItem('playerName');
  if (stored) {
    if ($nameLobby && $nameLobby.value !== stored) {
      $nameLobby.value = stored;
    }
    if ($nameDisplay) {
      $nameDisplay.textContent = stored;
    }
    sendMsg({ type: 'set_name', name: stored });
  }
  if (state.room?.id) {
    sendMsg({ type: 'join_room', code: state.room.id });
  }
}

function handleRoomUpdate(msg) {
  renderRoom(msg.room);
}

function handlePlayTrack(msg) {
  const t = msg.track;
  state.lastTrack = t;
  state.revealed = false;
  $npTitle.textContent = '???';
  $npArtist.textContent = '';
  $npYear.textContent = '';
  // reset answer UI
  if ($guessTitle) $guessTitle.value = '';
  if ($guessArtist) $guessArtist.value = '';
  if ($answerResult) { $answerResult.textContent=''; $answerResult.className='mt-1 text-sm'; }
  try {
    $audio.preload = 'auto';
  } catch {}
  $audio.src = t.url;
  const pf = document.getElementById('progressFill');
  if (pf) {
    pf.style.width = '0%';
  }
  const rd = document.getElementById('recordDisc');
  if (rd) {
    rd.classList.remove('spin-record');
  }
  const { startAt, serverNow } = msg;
  const now = Date.now();
  const offsetMs = startAt - serverNow;
  const localStart = now + offsetMs;
  const delay = Math.max(0, localStart - now);
  setTimeout(() => {
    $audio.currentTime = 0;
    $audio.play().catch(() => {});
    const disc = document.getElementById('recordDisc');
    if (disc) {
      disc.classList.add('spin-record');
    }
  }, delay);
  if (state.room) {
    renderRoom(state.room);
  }
}

function handleSync(msg) {
  applySync(msg.startAt, msg.serverNow);
}

function handleControl(msg) {
  const { action, startAt, serverNow } = msg;
  if (action === 'pause') {
    $audio.pause();
    const disc = document.getElementById('recordDisc');
    if (disc) {
      disc.classList.remove('spin-record');
    }
    $audio.playbackRate = 1.0;
  } else if (action === 'play') {
    if (startAt && serverNow) {
      const now = Date.now();
      const elapsed = (now - startAt) / 1000;
      $audio.currentTime = Math.max(0, elapsed);
    }
    $audio.play().catch(() => {});
    const disc = document.getElementById('recordDisc');
    if (disc) {
      disc.classList.add('spin-record');
    }
  }
}

function handleReveal(msg) {
  const { result, track } = msg;
  $npTitle.textContent = track.title || track.id || 'Track';
  $npArtist.textContent = track.artist ? ` – ${track.artist}` : '';
  $npYear.textContent = track.year ? ` (${track.year})` : '';
  state.revealed = true;
  const $rb = document.getElementById('revealBanner');
  if ($rb) {
    if (result.correct) {
      $rb.textContent = 'Richtig!';
      $rb.className = 'inline-block rounded-md bg-emerald-600 text-white px-3 py-1 text-sm font-medium';
    } else {
      $rb.textContent = 'Falsch!';
      $rb.className = 'inline-block rounded-md bg-rose-600 text-white px-3 py-1 text-sm font-medium';
    }
  }
  const $placeArea = document.getElementById('placeArea');
  if ($placeArea) {
    $placeArea.classList.add('hidden');
  }
}

function handleGameEnded(msg) {
  alert(`Gewinner: ${shortName(msg.winner)}`);
}

function onMessage(ev) {
  const msg = JSON.parse(ev.data);
  switch (msg.type) {
    case 'connected':
      handleConnected(msg);
      break;
    case 'room_update':
      handleRoomUpdate(msg);
      break;
    case 'play_track':
      handlePlayTrack(msg);
      break;
    case 'sync':
      handleSync(msg);
      break;
    case 'control':
      handleControl(msg);
      break;
    case 'reveal':
      handleReveal(msg);
      break;
    case 'game_ended':
      handleGameEnded(msg);
      break;
    case 'answer_result': {
      if ($answerResult) {
        if (!msg.ok) {
          $answerResult.textContent = '⛔ Eingabe ungültig oder gerade nicht möglich';
          $answerResult.className = 'mt-1 text-sm text-rose-600';
        } else {
          const okBoth = !!(msg.correctTitle && msg.correctArtist);
          const parts = [];
          parts.push(msg.correctTitle ? 'Titel ✓' : 'Titel ✗');
          parts.push(msg.correctArtist ? 'Künstler ✓' : 'Künstler ✗');
          let coin = '';
          if (msg.awarded) coin = ' +1 Token';
          else if (msg.alreadyAwarded) coin = ' (bereits erhalten)';
          $answerResult.textContent = `${parts.join(' · ')}${coin}`;
          $answerResult.className = okBoth ? 'mt-1 text-sm text-emerald-600' : 'mt-1 text-sm text-amber-600';
        }
      }
      break;
    }
    default:
      break;
  }
}

function shortName(id) {
  if (!id) return '-';
  const p = state.room?.players.find((x) => x.id === id);
  return p ? p.name : id.slice(0, 4);
}

function wire(el, type, handler) {
  if (el) {
    el.addEventListener(type, handler);
  }
}

function wireUi() {
  initAudioUI();
  wire($setNameLobby, 'click', () => {
    const name = $nameLobby.value.trim();
    if (!name) return;
    localStorage.setItem('playerName', name);
    if ($nameDisplay) {
      $nameDisplay.textContent = name;
    }
    sendMsg({ type: 'set_name', name });
  });
  wire($createRoom, 'click', () => sendMsg({ type: 'create_room' }));
  wire($joinRoom, 'click', () => {
    const code = $roomCode.value.trim();
    if (code) {
      sendMsg({ type: 'join_room', code });
    }
  });
  wire($leaveRoom, 'click', () => {
    sendMsg({ type: 'leave_room' });
    state.room = null;
    $lobby.classList.remove('hidden');
    $room.classList.add('hidden');
  });
  wire($startGame, 'click', () => sendMsg({ type: 'start_game' }));
  wire($readyChk, 'change', (e) => {
    const val = !!e.target.checked;
    state.pendingReady = val;
    sendMsg({ type: 'set_ready', ready: val });
  });
  wire($placeBtn, 'click', () => {
    const slot = parseInt($slotSelect.value, 10);
    sendMsg({ type: 'place_guess', slot });
  });
  wire($playBtn, 'click', () => sendMsg({ type: 'player_control', action: 'play' }));
  wire($pauseBtn, 'click', () => sendMsg({ type: 'player_control', action: 'pause' }));
  wire($nextBtn, 'click', () => sendMsg({ type: 'next_track' }));
  if ($volumeSlider && $audio) {
    try {
      $volumeSlider.value = String($audio.volume ?? 1);
    } catch {}
    $volumeSlider.addEventListener('input', () => {
      $audio.volume = parseFloat($volumeSlider.value);
    });
  }
  if ($copyRoomCode) {
    $copyRoomCode.style.display = 'inline-block';
    wire($copyRoomCode, 'click', () => {
      if (state.room?.id) {
        navigator.clipboard.writeText(state.room.id).then(() => {
          $copyRoomCode.textContent = '✔️';
          showToast('Code kopiert!');
          setTimeout(() => {
            $copyRoomCode.textContent = '📋';
          }, 1200);
        });
      }
    });
  }
  if ($roomId) {
    wire($roomId, 'click', () => {
      if (state.room?.id) {
        navigator.clipboard.writeText(state.room.id).then(() => {
          $roomId.title = 'Kopiert!';
          showToast('Code kopiert!');
          setTimeout(() => {
            $roomId.title = 'Klicken zum Kopieren';
          }, 1200);
        });
      }
    });
    $roomId.style.cursor = 'pointer';
  }
  // Answer submit
  const form = document.getElementById('answerForm');
  if (form) {
    form.addEventListener('submit', (e) => {
      e.preventDefault();
      const title = ($guessTitle?.value || '').trim();
      const artist = ($guessArtist?.value || '').trim();
      if (!title || !artist) {
        if ($answerResult) { $answerResult.textContent = 'Bitte Titel und Künstler eingeben'; $answerResult.className = 'mt-1 text-sm text-amber-600'; }
        return;
      }
      sendMsg({ type: 'submit_answer', guess: { title, artist } });
    });
  }
}

// boot
wireUi();
connectWS(onMessage);

// restore name immediately if present
(() => {
  const saved = localStorage.getItem('playerName');
  if (saved) {
    if ($nameLobby && $nameLobby.value !== saved) {
      $nameLobby.value = saved;
    }
    if ($nameDisplay) {
      $nameDisplay.textContent = saved;
    }
  }
})();