create table if not exists identity (
       identity_id integer primary key autoincrement
       , identity_public_id uuid
       , data text
       , created_at timestamptz not null
       , deleted_at timestamptz
       , unique(identity_public_id)
);

create table if not exists session (
       session_id integer primary key autoincrement
       , identity_id bigint not null references identity(identity_id)
       , secret_hash bytea not null
       , created_at timestamptz not null
       , expired_at timestamptz
       , revoked_at timestamptz
       , unique(secret_hash)
);

create table if not exists oauth_provider (
       oauth_provider_id integer primary key autoincrement
       , name text not null
       , flow text not null
       , base_url text not null
       , response_type text not null
       , default_scope text
       , client_id text not null
       , client_secret text not null
       , redirect_url text not null
       , created_at timestamptz not null
       , deleted_at timestamptz
       , unique (name, flow)
);

create table if not exists oauth_validation (
       oauth_validation_id integer primary key autoincrement
       , oauth_validation_public_id uuid not null
       , oauth_provider_id integer not null references oauth_provider(oauth_provider_id)
       , access_token text
       , raw_response text
       , created_at timestamptz not null
       , validated_at timestamptz
       , unique (oauth_validation_public_id)
);

create table if not exists identity_oauth_validation (
       identity_oauth_validation_id integer primary key autoincrement
       -- A validation does not require an identity to initiate
       , identity_id bigint references identity(identity_id)
       , oauth_validation_id bigint not null references oauth_validation(oauth_validation_id)
       , revoked_at timestamptz
       , deleted_at timestamptz
       , unique(identity_id, oauth_validation_id)
);

create table if not exists email (
       email_id integer primary key autoincrement
       , address text not null
       , unique(address)
);

create table if not exists email_validation (
       email_validation_id integer primary key autoincrement
       , email_validation_public_id uuid not null
       , email_id bigint not null references email(email_id)
       , code text
       , is_oauth_derived boolean not null
       , created_at timestamptz not null
       , validated_at timestamptz
       , expired_at timestamptz
       , unique(email_validation_public_id)
);

create table if not exists identity_email_validation (
       identity_email_validation_id integer primary key autoincrement
       -- A validation does not require an identity to initiate
       , identity_id bigint references identity(identity_id)
       , email_validation_id bigint not null references email_validation(email_validation_id)
       , revoked_at timestamptz
       , deleted_at timestamptz
       , unique(identity_id, email_validation_id)
);
