import { rowHTML, setRows, safe, showToast, badge } from './helpers.js';
import { api } from './api.js';

// helpers
const q = (r, s) => (r || document).querySelector(s);
const qq = (r, s) => Array.from((r || document).querySelectorAll(s));
const low = (x) => String(x ?? '').toLowerCase();

// --- dropdown: wybierz pierwszy inny node od bieżącego
function rebuildTargetSelect(selectEl, currentNode, nodes) {
  if (!selectEl) return;
  const cur = String(currentNode || '').trim();
  const all = (nodes || []).map(n => String(n.name || n.node || n).trim()).filter(Boolean);
  const others = all.filter(n => n && n !== cur);
  selectEl.innerHTML = others.map(n => `<option value="${n}">${n}</option>`).join('');
  // domyślnie pierwszy sensowny inny node
  if (selectEl.options.length > 0) selectEl.selectedIndex = 0;
}

// --- statusy + przyciski
function boolRunning(statusRaw) { return /running|online|started/i.test(statusRaw || ''); }
function setButtonsByStatus(tr, statusRaw) {
  const running = boolRunning(statusRaw);
  // start tylko gdy nie działa
  const bStart    = tr.querySelector('.act-start');
  const bStop     = tr.querySelector('.act-stop');
  const bShutdown = tr.querySelector('.act-shutdown');

  if (bStart)    bStart.disabled    = running;
  if (bStop)     bStop.disabled     = !running;
  if (bShutdown) bShutdown.disabled = !running;

  // MIGRATE: aktywny także dla offline (offline migrate)
  const bMig = tr.querySelector('.act-migrate');
  const sel  = tr.querySelector('.target-node');
  const hasTarget = !!(sel && sel.value);
  // blokujemy tylko gdy nie ma targetu albo trwa „working/progress”
  const busy = /working|progress|busy/i.test(statusRaw || '');
  if (bMig) bMig.disabled = !hasTarget || busy;
}

// --- render
export async function renderVMAdmin() {
  const wrap = document.getElementById('vm-admin');
  if (!wrap) return;
  const tbody = wrap.querySelector('tbody');
  if (!tbody) return;

  // pobierz listy
  const [list, nodesSummary] = await Promise.all([api.listAllVmct(), api.nodesSummary()]);
  const all = Array.isArray(list.all) ? list.all : [];
  const nodes = Array.isArray(nodesSummary?.nodes) ? nodesSummary.nodes : [];

  // zbuduj wiersze (bez checkboxa)
  const rows = all.map(vm => {
    const status = safe(vm.status || vm.current?.status || vm.current?.qmpstatus || '—');
    const isRun  = boolRunning(status);
    return rowHTML([
      safe(vm.sid),
      safe(vm.name || vm.vmid || vm.sid),
      safe(vm.node || '—'),
      badge(status, isRun ? 'ok' : 'dark'),
      `<div class="btn-group">
         <button type="button" class="btn btn-sm btn-outline-success act-start">Start</button>
         <button type="button" class="btn btn-sm btn-outline-warning act-shutdown">Shutdown</button>
         <button type="button" class="btn btn-sm btn-outline-danger act-stop">Stop</button>
         <button type="button" class="btn btn-sm btn-outline-secondary act-unlock">Unlock</button>
       </div>`,
      `<div class="d-grid gap-1">
         <select class="form-select form-select-sm target-node"></select>
         <button type="button" class="btn btn-sm btn-outline-primary act-migrate">MIGRATE</button>
       </div>`
    ], `data-sid="${safe(vm.sid)}"`);
  });

  setRows(tbody, rows);

  // uzupełnij selecty + stany przycisków
  qq(tbody, 'tr[data-sid]').forEach(tr => {
    const nodeCell  = tr.children[2];
    const statusCell= tr.children[3];
    const sel = tr.querySelector('.target-node');
    rebuildTargetSelect(sel, nodeCell?.textContent?.trim(), nodes);
    setButtonsByStatus(tr, statusCell?.innerText || '');
  });

  // --- delegacja CLICK globalnie: łapie też elementy po rerenderach
  document.addEventListener('click', async (ev) => {
    const btn = ev.target.closest?.('.act-start,.act-stop,.act-shutdown,.act-unlock,.act-migrate');
    if (!btn) return;
    // zapobiegamy submitom, bąbelkowaniu itp.
    ev.preventDefault();
    ev.stopPropagation();

    const tr = btn.closest('tr[data-sid]');
    if (!tr) return;
    const sid = tr.getAttribute('data-sid');
    const name = tr.children[1]?.textContent?.trim() || sid;

    // mapowanie akcji
    let action = '';
    let target = undefined;
    if (btn.classList.contains('act-start'))    action = 'start';
    if (btn.classList.contains('act-stop'))     action = 'stop';
    if (btn.classList.contains('act-shutdown')) action = 'shutdown';
    if (btn.classList.contains('act-unlock'))   action = 'unlock';
    if (btn.classList.contains('act-migrate')) {
      action = 'migrate';
      target = tr.querySelector('.target-node')?.value;
      if (!target) {
        showToast('Migrate', 'Wybierz docelowy node inny niż bieżący', 'warning');
        return;
      }
    }

    try {
      const res = await api.vmAction(sid, action, target);
      if (res?.ok) {
        showToast('OK', `${action.toUpperCase()} × ${name}`, 'success');
      } else {
        showToast('Błąd', res?.error || `Nie udało się: ${action}`, 'danger');
      }
    } catch (e) {
      showToast('Błąd', String(e?.message || e), 'danger');
    }
  }, { capture: true }); // capture: pewność, że nasz handler zadziała przed innymi

  // prosty, lekki refresh co 30s (statusy i node)
  setInterval(async () => {
    try {
      const latest = await api.listAllVmct();
      const bySid = new Map((latest?.all || []).map(x => [String(x.sid), x]));
      qq(tbody, 'tr[data-sid]').forEach(tr => {
        const sid = tr.getAttribute('data-sid');
        const row = bySid.get(sid);
        if (!row) return;
        const nodeCell   = tr.children[2];
        const statusCell = tr.children[3];
        const sel        = tr.querySelector('.target-node');

        const newNode = String(row.node || '').trim();
        if (newNode && nodeCell?.textContent?.trim() !== newNode) {
          nodeCell.textContent = newNode;
          rebuildTargetSelect(sel, newNode, nodes);
        }

        const st = String(row.status || row.current?.status || row.current?.qmpstatus || '').trim();
        if (st && statusCell?.innerText?.trim() !== st) {
          statusCell.innerHTML = badge(st, boolRunning(st) ? 'ok' : 'dark');
          setButtonsByStatus(tr, st);
        }
      });
    } catch { /* no-op */ }
  }, 30000);
}