create schema if not exists confidence_engine;

create table confidence_engine.investigations (
  id uuid primary key,
  user_id uuid not null references auth.users(id) on delete cascade,
  snapshot jsonb not null,
  created_at timestamptz not null default now(),
  updated_at timestamptz not null default now()
);

create index investigations_user_id_idx
  on confidence_engine.investigations (user_id);

create function confidence_engine.set_updated_at()
returns trigger
language plpgsql
set search_path = ''
as $$
begin
  new.updated_at = now();
  return new;
end;
$$;

create trigger investigations_set_updated_at
before update on confidence_engine.investigations
for each row execute function confidence_engine.set_updated_at();

alter table confidence_engine.investigations enable row level security;

grant usage on schema confidence_engine to authenticated;
grant select, insert, update, delete on confidence_engine.investigations to authenticated;

create policy "Users can select their own investigations"
on confidence_engine.investigations
for select to authenticated
using (user_id = auth.uid());

create policy "Users can insert their own investigations"
on confidence_engine.investigations
for insert to authenticated
with check (user_id = auth.uid());

create policy "Users can update their own investigations"
on confidence_engine.investigations
for update to authenticated
using (user_id = auth.uid())
with check (user_id = auth.uid());

create policy "Users can delete their own investigations"
on confidence_engine.investigations
for delete to authenticated
using (user_id = auth.uid());