-- 방문자 마스터 테이블: clientId 단위 집계 정보 보관
create table if not exists visitor_clients (
  id serial primary key,
  client_id varchar(120) not null unique,
  nickname varchar(80) not null,
  first_visited_at timestamptz not null default now(),
  last_visited_at timestamptz not null default now(),
  visit_count integer not null default 1,
  last_visited_url varchar(2000),
  last_user_agent varchar(1000),
  last_ip varchar(120),
  created_at timestamptz not null default now(),
  updated_at timestamptz not null default now()
);

create index if not exists idx_visitor_clients_last_visited_at
  on visitor_clients (last_visited_at desc);

-- 방문 상세 이력 테이블: 중복 방문도 모두 적재
create table if not exists visitor_visit_histories (
  id serial primary key,
  client_id varchar(120) not null,
  visited_at timestamptz not null default now(),
  url varchar(2000) not null,
  event_type varchar(80) not null default 'page_view',
  user_agent varchar(1000),
  ip varchar(120)
);

create index if not exists idx_visitor_visit_histories_client_id
  on visitor_visit_histories (client_id);

create index if not exists idx_visitor_visit_histories_visited_at
  on visitor_visit_histories (visited_at desc);