/* functions.js — CRUD операции с функциями */

function parseMethods(v) {
  const items = String(v || '').split(',').map(s => s.trim().toUpperCase()).filter(Boolean);
  return items.length ? Array.from(new Set(items)) : ['GET'];
}

function parseTimeout(v) {
  var n = Number(String(v || '').trim());
  if (!Number.isFinite(n) || n <= 0) return 60;
  return Math.round(n);
}

function onLangChange() {
  var lang = document.getElementById('c-lang').value;
  var t = LANG_TEMPLATES[lang];
  if (t) {
    document.getElementById('c-entry').value = t.entrypoint;
    document.getElementById('c-code').value = t.code;
  }
}

function openCreate() {
  document.getElementById('c-lang').value = 'python';
  onLangChange();
  document.getElementById('c-timeout').value = '60';
  document.getElementById('c-schedule-enabled').checked = false;
  document.getElementById('c-cron').value = '';
  toggleScheduleFields('c');
  document.getElementById('create-modal').classList.add('open');
  document.getElementById('c-name').focus();
}

function closeCreate() {
  document.getElementById('create-modal').classList.remove('open');
}

async function submitCreate() {
  const btn = document.getElementById('c-submit');
  btn.disabled = true;
  const progress = startTimedStatus('Создаём функцию...', 'Создание функции...', explainDelay);
  try {
    const name = document.getElementById('c-name').value.trim();
    if (!name) throw new Error('name is required');
    const lang = document.getElementById('c-lang').value.trim();
    if (!lang) throw new Error('language is required');

    await requestJSON(API_BASE + '/functions', 'POST', {
      name: name,
      language: lang,
      entrypoint: document.getElementById('c-entry').value.trim(),
      route: document.getElementById('c-route').value.trim(),
      methods: parseMethods(document.getElementById('c-methods').value),
      timeout: parseTimeout(document.getElementById('c-timeout').value),
      code: document.getElementById('c-code').value
    });

    try {
      await syncScheduleForFunction(name, 'c');
    } catch (scheduleErr) {
      try {
        await requestJSON(API_BASE + '/functions/' + encodeURIComponent(name), 'DELETE');
      } catch (rollbackErr) {
        scheduleErr.message += '; rollback failed: ' + rollbackErr.message;
      }
      throw scheduleErr;
    }

    closeCreate();
    progress.stop('Функция создана: ' + name, 'ok');
    await reloadAll();
  } catch (e) {
    progress.stop('Ошибка создания: ' + e.message, 'err');
  } finally {
    btn.disabled = false;
  }
}

async function openEdit(name) {
  try {
    const fn = await getJSON(API_BASE + '/functions/' + encodeURIComponent(name));
    S.currentEdit = fn;
    document.getElementById('e-title').textContent = 'Редактирование: ' + name;
    document.getElementById('e-name').value = name;
    document.getElementById('e-env').value = fn.environment || '';
    document.getElementById('e-entry').value = fn.entrypoint || '';
    document.getElementById('e-timeout').value = String(fn.timeout || 60);
    document.getElementById('e-code').value = fn.code || '';
    var schedule = timeTriggerByFn(name);
    document.getElementById('e-schedule-enabled').checked = !!schedule;
    document.getElementById('e-cron').value = (schedule && schedule.spec && schedule.spec.cron) || '';
    toggleScheduleFields('e');
    var envName = (fn.environment || '').toLowerCase();
    var lang = 'python';
    if (envName.includes('node')) lang = 'nodejs';
    else if (envName.includes('go')) lang = 'go';
    else if (envName.includes('ruby')) lang = 'ruby';
    else if (envName.includes('php')) lang = 'php';
    document.getElementById('e-lang-hidden').value = lang;
    var aiRes = document.getElementById('e-ai-result');
    if (aiRes) { aiRes.style.display = 'none'; aiRes.textContent = ''; }
    var warnEl = document.getElementById('e-tf-warn');
    if (warnEl) {
      var isTf = /^tf-/.test(name) || /go[-_]env/.test(fn.environment || '');
      warnEl.style.display = isTf ? 'block' : 'none';
    }
    document.getElementById('edit-modal').classList.add('open');
  } catch (e) {
    showStatus('Ошибка загрузки функции: ' + e.message, 'err');
  }
}

function closeEdit() {
  document.getElementById('edit-modal').classList.remove('open');
  S.currentEdit = null;
}

async function submitEdit() {
  if (!S.currentEdit) return;
  const btn = document.getElementById('e-submit');
  btn.disabled = true;
  const progress = startTimedStatus('Сохраняем код...', 'Сохранение кода...', explainDelay);
  try {
    const name = S.currentEdit.name;
    await requestJSON(API_BASE + '/functions/' + encodeURIComponent(name) + '/code', 'PUT', {
      code: document.getElementById('e-code').value,
      timeout: parseTimeout(document.getElementById('e-timeout').value)
    });

    await syncScheduleForFunction(name, 'e');
    closeEdit();
    progress.stop('Код обновлён: ' + name, 'ok');
    await reloadAll();
  } catch (e) {
    progress.stop('Ошибка обновления: ' + e.message, 'err');
  } finally {
    btn.disabled = false;
  }
}

async function removeFn(name) {
  var tfWarn = (/^tf-/.test(name)) ? '\n\n⚠️ Эта функция управляется Terraform. Удаление приведёт к рассинхронизации state!' : '';
  if (!confirm('Удалить функцию ' + name + '?' + tfWarn)) return;
  var progress = startTimedStatus('Удаляем функцию...', 'Удаление функции...', explainDelay);
  try {
    await requestJSON(API_BASE + '/functions/' + encodeURIComponent(name), 'DELETE');
    progress.stop('Функция удалена: ' + name, 'ok');
    await reloadAll();
  } catch (e) {
    progress.stop('Ошибка удаления: ' + e.message, 'err');
  }
}