-- Create tables
CREATE TABLE users (
    id SERIAL PRIMARY KEY,
    name VARCHAR(30) NOT NULL,
    email VARCHAR(255) NOT NULL,
    password VARCHAR NULL,
    time_create BIGINT NOT NULL,
    reset_password_token VARCHAR(150) NULL,
    time_gen_reset_token BIGINT NOT NULL DEFAULT 0,
    delete_account_token VARCHAR(150) NULL,
    time_gen_delete_account_token BIGINT NOT NULL DEFAULT 0,
    time_activate BIGINT NOT NULL DEFAULT 0,
    active BOOLEAN NOT NULL DEFAULT TRUE,
    admin BOOLEAN NOT NULL DEFAULT FALSE
);

CREATE TABLE families (
    id SERIAL PRIMARY KEY,
    time_create BIGINT NOT NULL,
    name VARCHAR(30) NOT NULL,
    invitation_code VARCHAR(7) NOT NULL
);

CREATE TABLE memberships (
    user_id integer NOT NULL REFERENCES users,
    family_id integer NOT NULL REFERENCES families,
    time_create BIGINT NOT NULL,
    is_admin BOOLEAN NOT NULL DEFAULT FALSE,

    PRIMARY KEY(user_id, family_id)
);

-- Create views
create view
	families_memberships
as
select
	m.user_id ,
	m.family_id,
	m.is_admin ,
	f."name",
	f.time_create,
	f.invitation_code,
	cm.num as count_members,
	ca.num as count_admins
from
	memberships m
left join families f on
	f.id = m.family_id
	-- count members
left join (
	select
		family_id ,
		count(*) as num
	from
		memberships m
	group by
		family_id) cm on
	cm.family_id = m.family_id
	-- count admins
left join (
	select
		family_id ,
		count(*) as num
	from
		memberships m
	where
		m.is_admin = true
	group by
		family_id) ca on
	ca.family_id = m.family_id