/** Agency scheduling helpers for creative_pipeline. */

export const PUBLISH_CHANNELS = ['instagram', 'facebook'] as const;
export type PublishChannel = (typeof PUBLISH_CHANNELS)[number];

export const PUBLISH_STATUSES = [
  'idle',
  'queued',
  'publishing',
  'published',
  'failed',
] as const;
export type PublishStatus = (typeof PUBLISH_STATUSES)[number];

export function normalizeChannels(raw: unknown): PublishChannel[] {
  const list = Array.isArray(raw)
    ? raw.map((x) => String(x).toLowerCase().trim())
    : typeof raw === 'string'
      ? raw.split(',').map((x) => x.toLowerCase().trim())
      : [];
  const out = PUBLISH_CHANNELS.filter((c) => list.includes(c));
  return out.length ? [...out] : ['instagram', 'facebook'];
}

/** Parse datetime-local or ISO into timestamptz ISO, or null to clear. */
export function parseScheduledAt(raw: unknown): string | null | undefined {
  if (raw === null) return null;
  if (raw === undefined) return undefined;
  if (typeof raw !== 'string') return undefined;
  const t = raw.trim();
  if (!t) return null;
  const d = new Date(t);
  if (Number.isNaN(d.getTime())) return undefined;
  return d.toISOString();
}

export function toDatetimeLocalValue(iso?: string | null): string {
  if (!iso) return '';
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return '';
  const pad = (n: number) => String(n).padStart(2, '0');
  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}T${pad(d.getHours())}:${pad(d.getMinutes())}`;
}

export function scheduleLabel(iso?: string | null): string | null {
  if (!iso) return null;
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return null;
  return d.toLocaleString('es-ES', {
    weekday: 'short',
    day: 'numeric',
    month: 'short',
    hour: '2-digit',
    minute: '2-digit',
  });
}