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minesweeper
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"""Custom web interface for the Minesweeper environment."""

MINESWEEPER_HTML = """<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Minesweeper</title>
<style>
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #1a1a2e; color: #eee; min-height: 100vh; display: flex; flex-direction: column; align-items: center; padding: 20px; }
  h1 { margin-bottom: 10px; font-size: 24px; }
  .status-bar { display: flex; gap: 20px; margin-bottom: 15px; font-size: 14px; color: #aaa; }
  .status-bar span { background: #16213e; padding: 6px 14px; border-radius: 6px; }
  .status-bar .val { color: #e94560; font-weight: 600; }
  #board { display: inline-grid; gap: 2px; background: #16213e; padding: 6px; border-radius: 8px; margin-bottom: 15px; }
  .cell { width: 52px; height: 52px; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700; border-radius: 4px; cursor: pointer; user-select: none; transition: background 0.1s; }
  .cell.unrevealed { background: #0f3460; }
  .cell.unrevealed:hover { background: #1a5276; }
  .cell.revealed { background: #2c3e6d; cursor: default; }
  .cell.flag { background: #e94560; }
  .cell.mine { background: #c0392b; }
  .cell.n1 { color: #3498db; } .cell.n2 { color: #2ecc71; } .cell.n3 { color: #e74c3c; }
  .cell.n4 { color: #9b59b6; } .cell.n5 { color: #e67e22; } .cell.n6 { color: #1abc9c; }
  .cell.n7 { color: #34495e; } .cell.n8 { color: #95a5a6; }
  .controls { display: flex; gap: 10px; margin-bottom: 15px; align-items: center; }
  .btn { padding: 10px 24px; border: none; border-radius: 6px; font-size: 14px; font-weight: 600; cursor: pointer; transition: opacity 0.15s; }
  .btn:hover { opacity: 0.85; }
  .btn-reset { background: #e94560; color: white; }
  .btn-mode { background: #0f3460; color: white; min-width: 140px; }
  .btn-mode.flagging { background: #e94560; }
  #message { font-size: 18px; font-weight: 600; min-height: 28px; margin-bottom: 10px; }
  .reward-display { font-size: 13px; color: #888; margin-bottom: 10px; }
  .won { color: #2ecc71; }
  .lost { color: #e74c3c; }
</style>
</head>
<body>
<h1>Minesweeper</h1>
<div id="message">Click Reset to start</div>
<div class="reward-display" id="reward"></div>
<div class="status-bar">
  <span>Mines: <span class="val" id="mines">-</span></span>
  <span>Flags: <span class="val" id="flags">-</span></span>
  <span>Revealed: <span class="val" id="revealed">-</span></span>
</div>
<div id="board"></div>
<div class="controls">
  <button class="btn btn-reset" id="reset-btn">Reset</button>
  <button class="btn btn-mode" id="mode-btn">Mode: Reveal</button>
</div>
<script>
let mode = 'reveal';
let gameOver = false;

document.getElementById('reset-btn').addEventListener('click', doReset);
document.getElementById('mode-btn').addEventListener('click', () => {
  mode = mode === 'reveal' ? 'flag' : 'reveal';
  const btn = document.getElementById('mode-btn');
  btn.textContent = 'Mode: ' + (mode === 'reveal' ? 'Reveal' : 'Flag');
  btn.classList.toggle('flagging', mode === 'flag');
});

async function doReset() {
  gameOver = false;
  document.getElementById('message').textContent = 'Resetting...';
  document.getElementById('message').className = '';
  try {
    const r = await fetch('/reset', { method: 'POST', headers: {'Content-Type':'application/json'} });
    const data = await r.json();
    renderBoard(data);
    document.getElementById('message').textContent = 'Click a cell to play!';
  } catch(e) { document.getElementById('message').textContent = 'Error: ' + e.message; }
}

async function doStep(row, col) {
  if (gameOver) return;
  try {
    const r = await fetch('/step', {
      method: 'POST',
      headers: {'Content-Type':'application/json'},
      body: JSON.stringify({ action: { row, col, action_type: mode } })
    });
    const data = await r.json();
    renderBoard(data);
  } catch(e) { document.getElementById('message').textContent = 'Error: ' + e.message; }
}

function renderBoard(data) {
  const obs = data.observation || {};
  const board = obs.board || [];
  const rows = board.length;
  const cols = rows > 0 ? board[0].length : 0;

  document.getElementById('mines').textContent = obs.num_mines ?? '-';
  document.getElementById('flags').textContent = obs.flags_placed ?? '-';
  document.getElementById('revealed').textContent = obs.cells_revealed ?? '-';

  if (data.reward !== null && data.reward !== undefined) {
    document.getElementById('reward').textContent = 'Last reward: ' + data.reward;
  }

  const status = obs.game_status;
  if (status === 'won') {
    document.getElementById('message').textContent = 'You won!';
    document.getElementById('message').className = 'won';
    gameOver = true;
  } else if (status === 'lost') {
    document.getElementById('message').textContent = 'Game over - hit a mine!';
    document.getElementById('message').className = 'lost';
    gameOver = true;
  }

  const el = document.getElementById('board');
  el.style.gridTemplateColumns = 'repeat(' + cols + ', 52px)';
  el.innerHTML = '';

  for (let r = 0; r < rows; r++) {
    for (let c = 0; c < cols; c++) {
      const v = board[r][c];
      const cell = document.createElement('div');
      cell.className = 'cell';
      if (v === -1) {
        cell.classList.add('unrevealed');
        cell.addEventListener('click', () => doStep(r, c));
      } else if (v === 'F') {
        cell.classList.add('flag');
        cell.textContent = '\\u{1f6a9}';
        cell.addEventListener('click', () => doStep(r, c));
      } else if (v === '*') {
        cell.classList.add('mine');
        cell.textContent = '\\u{1f4a3}';
      } else {
        cell.classList.add('revealed');
        if (v > 0) { cell.textContent = v; cell.classList.add('n' + v); }
      }
      el.appendChild(cell);
    }
  }
}

// Auto-reset on load
doReset();
</script>
</body>
</html>"""