// Repo / CI panel: git state of the current session's folder plus the Gitea CI
// status of its HEAD commit (`devdesk attach --repo <session>`).

const CI = {
  success: ['passing', 'lt-status-completed'],
  failure: ['failed', 'lt-status-failed'],
  error: ['error', 'lt-status-failed'],
  pending: ['running', 'lt-status-running'],
  warning: ['warning', 'lt-status-pending'],
};

function link(href, text) {
  const a = document.createElement('a');
  a.href = href;
  a.target = '_blank';
  a.rel = 'noopener';
  a.textContent = text;
  return a;
}

export function renderRepo(root, repo) {
  const field = (name) => root.querySelector(`[data-field="${name}"]`);
  const set = (name, value) => field(name).replaceChildren(value);
  const grid = root.querySelector('.dd-repo-grid');
  const note = root.querySelector('.dd-repo-note');
  const fix = root.querySelector('.dd-fix-ci');
  fix.hidden = true;

  // No repository: one line instead of a grid of dashes (devdesk#17).
  if (!repo || !repo.git) {
    root.dataset.state = 'empty';
    grid.hidden = true;
    note.textContent = repo ? `Not a git repository: ${repo.dir}` : 'Open a session to see its repository.';
    return;
  }

  root.dataset.state = 'live';
  grid.hidden = false;
  set('repo', repo.url ? link(repo.url, repo.repo) : (repo.remote || 'no remote'));
  const sync = repo.upstream
    ? [repo.ahead ? `↑${repo.ahead}` : '', repo.behind ? `↓${repo.behind}` : ''].filter(Boolean).join(' ') || 'in sync'
    : 'no upstream';
  set('branch', `${repo.branch} @ ${repo.sha || '—'} · ${sync}`);
  set('dirty', repo.dirty ? `${repo.dirty} changed` : 'clean');

  const ci = field('ci');
  const [label, cls] = repo.ci?.total ? (CI[repo.ci.state] || [repo.ci.state, 'lt-status-pending'])
    : [repo.ahead ? 'not pushed' : 'no CI', ''];
  ci.className = `lt-status ${cls}`;
  ci.replaceChildren(repo.ci?.url ? link(repo.ci.url, label) : label);

  set('prs', repo.url && repo.prs != null ? link(`${repo.url}/pulls`, `${repo.prs} open`) : '—');
  note.textContent = repo.repo ? '' : 'Not a Gitea repository; CI status unavailable.';

  if (repo.ci?.total && ['failure', 'error'].includes(repo.ci.state)) {
    fix.hidden = false;
    fix.dataset.askClaude = `CI is failing for ${repo.repo} on ${repo.branch} at ${repo.sha}`
      + ` (${repo.ci.url || 'see Gitea Actions'}). Use the gitea MCP server to read the failed job's log,`
      + ' find the cause, and fix it. Tell me the plan before pushing anything.';
  }
}