create table if not exists scan_jobs (
  id text primary key,
  name text not null,
  status text not null check (status in ('queued','running','done','failed','canceled')),
  cidrs jsonb not null,
  exclude_ips jsonb not null default '[]'::jsonb,
  options jsonb not null,
  progress int not null default 0,
  stats jsonb not null default '{}'::jsonb,
  snmp_credentials_id text null,
  created_at timestamptz not null default now(),
  started_at timestamptz null,
  finished_at timestamptz null
);

create index if not exists idx_scan_jobs_created_at on scan_jobs (created_at desc);

alter table scan_jobs add column if not exists progress int not null default 0;
alter table scan_jobs add column if not exists stats jsonb not null default '{}'::jsonb;

create table if not exists scan_hosts (
  id bigserial primary key,
  scan_id text not null references scan_jobs(id) on delete cascade,
  ip inet not null,
  is_up boolean not null,
  checked_at timestamptz not null
);

create index if not exists idx_scan_hosts_scan_id_checked_at
  on scan_hosts (scan_id, checked_at desc);