-- Agency-only scheduling for editorial creativities.
-- aprobado + scheduled_at → cron publishes IG/FB; status becomes publicado.
-- Idempotent.

alter table public.creative_pipeline
  add column if not exists scheduled_at timestamptz;

alter table public.creative_pipeline
  add column if not exists channels text[] not null default array['instagram','facebook']::text[];

alter table public.creative_pipeline
  add column if not exists publish_status text not null default 'idle';

do $$ begin
  if not exists (
    select 1 from pg_constraint where conname = 'creative_pipeline_publish_status_chk'
  ) then
    alter table public.creative_pipeline
      add constraint creative_pipeline_publish_status_chk
      check (publish_status in ('idle', 'queued', 'publishing', 'published', 'failed'));
  end if;
end $$;

alter table public.creative_pipeline
  add column if not exists publish_attempts int not null default 0;

alter table public.creative_pipeline
  add column if not exists published_at timestamptz;

alter table public.creative_pipeline
  add column if not exists meta_ig_media_id text;

alter table public.creative_pipeline
  add column if not exists meta_fb_post_id text;

alter table public.creative_pipeline
  add column if not exists publish_error text;

create index if not exists creative_pipeline_due_publish_idx
  on public.creative_pipeline (tenant_id, scheduled_at)
  where status = 'aprobado' and publish_status in ('idle', 'queued', 'failed');

create index if not exists creative_pipeline_scheduled_at_idx
  on public.creative_pipeline (tenant_id, scheduled_at)
  where scheduled_at is not null;

comment on column public.creative_pipeline.scheduled_at is
  'Agency-only: when to publish to Meta (IG/FB). Null = not scheduled.';
comment on column public.creative_pipeline.channels is
  'Agency-only: subset of {instagram,facebook} to publish at scheduled_at.';
comment on column public.creative_pipeline.publish_status is
  'idle|queued|publishing|published|failed — worker state separate from editorial status.';