<?php require __DIR__ . '/../layout/header.php'; ?>

<div class="d-flex justify-content-between align-items-center mb-3">
  <div>
    <h4 class="m-0"><?= e($repo['owner_username']) ?>/<?= e($repo['name']) ?> • PR #<?= (int)$pr['number'] ?></h4>
    <div class="text-muted"><?= e($pr['title']) ?></div>
    <div class="small text-muted mono"><?= e($pr['source_branch']) ?> → <?= e($pr['target_branch']) ?> • by <?= e($pr['author_name']) ?></div>
  </div>
  <a class="btn btn-outline-dark btn-sm" href="/r/<?= (int)$repo['id'] ?>/pulls">Back</a>
</div>

<?php if ($pr['state']==='open' && $canWrite): ?>
  <form method="post" action="/r/<?= (int)$repo['id'] ?>/pulls/<?= (int)$pr['number'] ?>/merge" class="mb-3">
    <input type="hidden" name="_csrf" value="<?= e(csrf_token()) ?>">
    <button class="btn btn-success" onclick="return confirm('Fast-forward merge this PR?');">Merge (Fast-forward)</button>
  </form>
<?php endif; ?>

<div class="card p-3 mb-3">
  <div class="fw-bold mb-2">Description</div>
  <div><?= nl2br(e($pr['body'] ?? '')) ?></div>
</div>

<div class="card p-3">
  <div class="fw-bold mb-2">Changes</div>

  <?php if (!$changes): ?>
    <div class="text-muted">No differences (branches identical).</div>
  <?php endif; ?>

  <?php foreach ($changes as $ch): ?>
    <div class="mt-3">
      <div class="d-flex justify-content-between align-items-center">
        <div class="mono fw-bold"><?= e($ch['path']) ?></div>
        <span class="badge bg-secondary"><?= e($ch['type']) ?></span>
      </div>

      <?php if ($ch['type'] === 'modified'): ?>
        <?php
          $old = $blobs->readBlobById($db, (int)$ch['a']);
          $new = $blobs->readBlobById($db, (int)$ch['b']);
          $lines = $diffEngine->lineDiff($old, $new);
        ?>
        <div class="mt-2">
          <?= $diffEngine->renderLineDiffHtml($lines) ?>
        </div>
      <?php else: ?>
        <div class="text-muted small mt-1">Preview for added/deleted can be added next.</div>
      <?php endif; ?>
      <hr>
    </div>
  <?php endforeach; ?>
</div>

<?php require __DIR__ . '/../layout/footer.php'; ?>