// FRAZIER Finance OS — API client + small formatters shared across pages.

const FIN_API = 'api/fin.php';

async function finApi(action, opts = {}) {
  const url = `${FIN_API}?action=${encodeURIComponent(action)}&_t=${Date.now()}${opts.query ? '&' + opts.query : ''}`;
  const body = opts.body ? opts.body : undefined;
  const res = await fetch(url, {
    method: body ? 'POST' : 'GET',
    credentials: 'same-origin',
    headers: Object.assign({ 'Cache-Control': 'no-cache' }, body ? { 'Content-Type': 'application/json' } : {}),
    cache: 'no-store',
    body: body ? JSON.stringify(body) : undefined,
  });
  const text = await res.text();
  let data; try { data = JSON.parse(text); } catch (e) { data = { error: 'bad_json', detail: text.slice(0, 200) }; }
  if (!res.ok || data.error) {
    const err = new Error(data.detail || data.error || `HTTP ${res.status}`);
    err.code = data.error; err.payload = data; err.status = res.status;
    throw err;
  }
  return data;
}

// Rupiah, no decimals — "Rp xxx" per the product spec, every home card.
function finIDR(n) {
  const v = Number(n) || 0;
  return 'Rp ' + Math.round(v).toLocaleString('id-ID');
}

function finMonthLabel(iso) {
  // iso: 'YYYY-MM' or a full date string.
  const d = new Date((String(iso || '').length <= 7 ? iso + '-01' : iso) + 'T00:00:00');
  if (isNaN(d.getTime())) return String(iso || '');
  return d.toLocaleDateString('en-GB', { month: 'long', year: 'numeric' });
}

Object.assign(window, { finApi, finIDR, finMonthLabel, FIN_API });