create table if not exists public.content_export_jobs (
  id uuid primary key default gen_random_uuid(),
  tenant_id uuid not null references public.tenants(id) on delete cascade,
  created_by uuid references public.platform_users(id) on delete set null,
  export_type text not null default 'questions'
    check (export_type in ('questions', 'paper', 'daily_practice')),
  format text not null default 'json'
    check (format in ('json', 'paper_json', 'print_payload')),
  scope_type text not null
    check (scope_type in ('collection', 'entry', 'content_node')),
  scope_id uuid not null,
  status text not null default 'completed'
    check (status in ('completed', 'failed')),
  include_answers boolean not null default true,
  include_explanations boolean not null default true,
  include_video_refs boolean not null default false,
  question_count integer not null default 0 check (question_count >= 0),
  summary jsonb not null default '{}'::jsonb,
  options jsonb not null default '{}'::jsonb,
  output_metadata jsonb not null default '{}'::jsonb,
  error_message text,
  finished_at timestamptz,
  created_at timestamptz not null default now(),
  updated_at timestamptz not null default now()
);

create index if not exists idx_content_export_jobs_tenant_created
  on public.content_export_jobs(tenant_id, created_at desc);

create index if not exists idx_content_export_jobs_scope
  on public.content_export_jobs(tenant_id, scope_type, scope_id, created_at desc);

alter table public.content_export_jobs enable row level security;

drop policy if exists tenant_isolation on public.content_export_jobs;
create policy tenant_isolation on public.content_export_jobs
  for all
  using (tenant_id = app.current_tenant_id() or app.is_platform_admin())
  with check (tenant_id = app.current_tenant_id() or app.is_platform_admin());

drop trigger if exists set_updated_at on public.content_export_jobs;
create trigger set_updated_at
  before update on public.content_export_jobs
  for each row execute function app.touch_updated_at();