/**
 * Team workload dashboard — fetches and renders team metrics.
 */

const container = document.querySelector('.app-details-container[data-team-workload-url]');
if (container) {
  const dataUrl = container.dataset.teamWorkloadUrl;
  const labelNotAssigned = container.dataset.labelNotAssigned || '—';

  const elLoading = document.getElementById('team-loading');
  const elError = document.getElementById('team-error');
  const elEmpty = document.getElementById('team-empty');
  const elContent = document.getElementById('team-content');
  const elBody = document.getElementById('team-table-body');
  const elRefresh = container.querySelector('button[name="team-refresh"]');
  const periodButtons = container.querySelectorAll('.helpdesk-team-period-button');

  let currentPeriod = 90;

  function showState(state) {
    if (elLoading) elLoading.hidden = state !== 'loading';
    if (elError) elError.hidden = state !== 'error';
    if (elEmpty) elEmpty.hidden = state !== 'empty';
    if (elContent) elContent.hidden = state !== 'success';
    if (elLoading) elLoading.setAttribute('aria-busy', state === 'loading' ? 'true' : 'false');
  }

  function setText(id, value) {
    const el = document.getElementById(id);
    if (el) el.textContent = value;
  }

  function renderKpis(kpis) {
    setText('team-kpi-open', kpis.open_tickets ?? 0);
    setText('team-kpi-unassigned', kpis.unassigned ?? 0);
    setText('team-kpi-avg-age', kpis.avg_age_hours ?? 0);
    setText('team-kpi-resolved', kpis.resolved_in_period ?? 0);
  }

  function createCell(text) {
    const td = document.createElement('td');
    td.textContent = text;
    return td;
  }

  function renderTable(members) {
    if (!elBody) return;
    elBody.replaceChildren();

    for (const m of members) {
      const tr = document.createElement('tr');
      const isUnassigned = m.support_user === '';
      const name = isUnassigned ? labelNotAssigned : m.display_name;

      const nameCell = document.createElement('td');
      nameCell.textContent = name;

      tr.appendChild(nameCell);
      tr.appendChild(createCell(String(m.open_tickets)));
      tr.appendChild(createCell(String(m.critical_tickets)));
      tr.appendChild(createCell(String(m.avg_age_hours)));
      tr.appendChild(createCell(String(m.resolved_in_period)));

      if (isUnassigned) {
        tr.classList.add('helpdesk-team-row-unassigned');
      }

      elBody.appendChild(tr);
    }
  }

  async function fetchData(refresh = false) {
    showState('loading');

    const params = new URLSearchParams({ periodDays: String(currentPeriod) });
    if (refresh) params.set('refresh', '1');

    try {
      const res = await fetch(dataUrl + '?' + params.toString(), { credentials: 'same-origin' });
      const json = await res.json();

      if (!json.ok) {
        showState('error');
        return;
      }

      if (!json.members || json.members.length === 0) {
        showState('empty');
        return;
      }

      renderKpis(json.kpis);
      renderTable(json.members);
      showState('success');
    } catch {
      showState('error');
    }
  }

  for (const button of periodButtons) {
    button.addEventListener('click', () => {
      const period = parseInt(button.dataset.period, 10);
      if (period === currentPeriod) return;
      currentPeriod = period;

      for (const b of periodButtons) {
        b.classList.toggle('active', b === button);
        b.setAttribute('aria-pressed', b === button ? 'true' : 'false');
      }

      fetchData();
    });
  }

  if (elRefresh) {
    elRefresh.addEventListener('click', () => fetchData(true));
  }

  fetchData();
}