CREATE TABLE IF NOT EXISTS domains (
    name varchar PRIMARY KEY
);

CREATE TABLE IF NOT EXISTS emails (
    id serial PRIMARY KEY,
    email varchar(255) NOT NULL UNIQUE
);

-- Make emails unique by lower-case comparison
CREATE UNIQUE INDEX IF NOT EXISTS email_unique_idx on emails (LOWER(email));

CREATE TABLE IF NOT EXISTS users (
    id serial PRIMARY KEY,
    email_id integer REFERENCES emails(id) ON DELETE RESTRICT NOT NULL UNIQUE,
    passwordhash varchar(255) NOT NULL,
    enabled boolean NOT NULL DEFAULT TRUE,
    is_admin boolean NOT NULL DEFAULT FALSE,
    can_use_different_alias_domain boolean NOT NULL DEFAULT FALSE,
    note text NOT NULL DEFAULT ''
);

-- source=me2@finn.st destination=me@finn.st: me2 is an alias of me
CREATE TABLE IF NOT EXISTS aliases (
    id serial PRIMARY KEY,
    source_email_id integer REFERENCES emails(id) ON DELETE RESTRICT NOT NULL,
    destination_user_id integer REFERENCES users(id) ON DELETE RESTRICT NOT NULL,
    enabled boolean NOT NULL DEFAULT TRUE,
    note text,
    UNIQUE(source_email_id, destination_user_id)
);