<?php

class BrowseController
{
  private array $cfg;
  public function __construct(array $cfg){ $this->cfg=$cfg; }

  public function browse(int $repoId): void {
    $db = db();
    $uid = auth_user_id();

    if (!repo_can_read($db, $repoId, $uid)) { http_response_code(403); exit("403"); }
    $repo = repo_get($db, $repoId);

    $branch = safe_branch($_GET['branch'] ?? $repo['default_branch']);
    $dir = safe_path($_GET['dir'] ?? '');

    $blobs = new BlobStore($this->cfg['storage_base']);
    $engine = new RepoEngine($blobs);
    $treeBuilder = new TreeBuilder();

    $head = $engine->getBranchHead($db, $repoId, $branch);
    $snapshot = $head ? $engine->getSnapshot($db, $head) : [];
    $tree = $treeBuilder->build($snapshot);
    $items = $treeBuilder->listDir($tree, $dir);

    $st = $db->prepare("SELECT name FROM branches WHERE repo_id=? ORDER BY name ASC");
    $st->execute([$repoId]);
    $branches = $st->fetchAll();

    $title = $repo['owner_username'] . "/" . $repo['name'] . " / Browse";
    require __DIR__ . '/../views/repos/browse.php';
  }

  public function file(int $repoId): void {
    $db = db();
    $uid = auth_user_id();

    if (!repo_can_read($db, $repoId, $uid)) { http_response_code(403); exit("403"); }
    $repo = repo_get($db, $repoId);

    $branch = safe_branch($_GET['branch'] ?? $repo['default_branch']);
    $path = safe_path($_GET['path'] ?? '');

    $blobs = new BlobStore($this->cfg['storage_base']);
    $engine = new RepoEngine($blobs);

    $head = $engine->getBranchHead($db, $repoId, $branch);
    if (!$head) { flash_set('err','No commits yet.'); redirect("/r/$repoId"); }

    $snap = $engine->getSnapshot($db, $head);
    if (!isset($snap[$path])) { http_response_code(404); exit("File not found"); }

    $content = $blobs->readBlobById($db, (int)$snap[$path]);
    if (substr_count($content, "\0") > 0) $content = "[Binary file preview not supported]";

    $title = $repo['owner_username'] . "/" . $repo['name'] . " / " . $path;
    require __DIR__ . '/../views/repos/file.php';
  }
}