create table if not exists assets (
  id text primary key,
  owner_id text not null,
  kind text not null,
  name text not null,
  url text not null,
  storage_path text,
  source text not null,
  tags text[] not null default '{}',
  metadata jsonb not null default '{}'::jsonb,
  created_at timestamptz not null default now(),
  updated_at timestamptz not null default now()
);

create table if not exists generation_jobs (
  id text primary key,
  owner_id text not null,
  capability text not null,
  provider text not null,
  req_key text not null,
  status text not null,
  prompt text,
  input_asset_ids text[] not null default '{}',
  input_urls text[] not null default '{}',
  output_asset_ids text[] not null default '{}',
  provider_task_id text,
  request_payload jsonb not null default '{}'::jsonb,
  response_payload jsonb,
  error jsonb,
  retry_of text,
  created_at timestamptz not null default now(),
  updated_at timestamptz not null default now()
);

create table if not exists usage_events (
  id text primary key,
  owner_id text not null,
  job_id text not null references generation_jobs(id) on delete cascade,
  capability text not null,
  quantity integer not null default 1,
  estimated_unit text not null default 'image',
  created_at timestamptz not null default now()
);

create table if not exists projects (
  id text primary key,
  owner_id text not null,
  name text not null,
  brief text not null default '',
  type text not null default 'custom',
  asset_ids text[] not null default '{}',
  created_at timestamptz not null default now(),
  updated_at timestamptz not null default now()
);

create index if not exists assets_owner_created_idx on assets(owner_id, created_at desc);
create index if not exists generation_jobs_owner_created_idx on generation_jobs(owner_id, created_at desc);
create index if not exists generation_jobs_status_idx on generation_jobs(status);
create index if not exists usage_events_owner_created_idx on usage_events(owner_id, created_at desc);