create table account (
    user_id int unsigned not null auto_increment primary key,
    username varchar(255) unique not null,
    password varchar(60) not null,
    is_admin bool not null default false,
    created_at timestamp default current_timestamp,
    updated_at timestamp default current_timestamp
) ENGINE=InnoDB;

create table website (
    website_id int unsigned not null auto_increment primary key,
    website_uuid varchar(36) unique not null,
    user_id int unsigned not null,
    name varchar(100) not null,
    domain varchar(500),
    created_at timestamp default current_timestamp,
    foreign key (user_id) references account(user_id) on delete cascade
) ENGINE=InnoDB;

create table session (
    session_id int unsigned not null auto_increment primary key,
    session_uuid varchar(36) unique not null,
    website_id int unsigned not null references website(website_id) on delete cascade,
    created_at timestamp default current_timestamp,
    hostname varchar(100),
    browser varchar(20),
    os varchar(20),
    device varchar(20),
    screen varchar(11),
    language varchar(35),
    country char(2),
    foreign key (website_id) references website(website_id) on delete cascade
) ENGINE=InnoDB;

create table pageview (
    view_id int unsigned not null auto_increment primary key,
    website_id int unsigned not null,
    session_id int unsigned not null,
    created_at timestamp default current_timestamp,
    url varchar(500) not null,
    referrer varchar(500),
    foreign key (website_id) references website(website_id) on delete cascade,
    foreign key (session_id) references session(session_id) on delete cascade
) ENGINE=InnoDB;

create table event (
    event_id int unsigned not null auto_increment primary key,
    website_id int unsigned not null,
    session_id int unsigned not null,
    created_at timestamp default current_timestamp,
    url varchar(500) not null,
    event_type varchar(50) not null,
    event_value varchar(50) not null,
    foreign key (website_id) references website(website_id) on delete cascade,
    foreign key (session_id) references session(session_id) on delete cascade
) ENGINE=InnoDB;

create index session_created_at_idx on session(created_at);
create index session_website_id_idx on session(website_id);

create index pageview_created_at_idx on pageview(created_at);
create index pageview_website_id_idx on pageview(website_id);
create index pageview_session_id_idx on pageview(session_id);

create index event_created_at_idx on event(created_at);
create index event_website_id_idx on event(website_id);
create index event_session_id_idx on event(session_id);

drop function if exists date_trunc;
create function date_trunc(
  in_granularity enum('minute', 'hour', 'day', 'month', 'year'),
  in_datetime datetime(6)
)
returns datetime(6)
deterministic 
begin
  if (in_granularity = 'minute') then
    return DATE_FORMAT(in_datetime, '%Y-%m-%d %H:%i:00.0000');
  end if;
  if (in_granularity = 'hour') then
    return DATE_FORMAT(in_datetime, '%Y-%m-%d %H:00:00.0000');
  end if;
  if (in_granularity = 'day') then
    return DATE_FORMAT(in_datetime, '%Y-%m-%d 00:00:00.0000');
  end if;
  if (in_granularity = 'month') then
    return DATE_FORMAT(in_datetime, '%Y-%m-01 00:00:00.0000');
  end if;
  if (in_granularity = 'year') then
    return DATE_FORMAT(in_datetime, '%Y-01-01 00:00:00.0000');
  end if;
end;

insert into account (username, password, is_admin) values ('admin', '$2a$10$BXHPV7APlV1I6WrKJt1igeJAyVsvbhMTaTAi3nHkUJFGPsYmfZq3y', true);