CREATE TABLE IF NOT EXISTS auth_email_identities (
    id BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    email VARCHAR(255) NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT auth_email_identities_user_unique
        UNIQUE(user_id),
    CONSTRAINT auth_email_identities_email_not_empty
        CHECK (length(trim(email)) > 0)
);

CREATE UNIQUE INDEX IF NOT EXISTS idx_auth_email_identities_email_lower
    ON auth_email_identities(LOWER(email));

CREATE INDEX IF NOT EXISTS idx_auth_email_identities_user_id
    ON auth_email_identities(user_id);

CREATE INDEX IF NOT EXISTS idx_auth_email_identities_email_trgm
    ON auth_email_identities USING gin(email gin_trgm_ops);

CREATE TRIGGER update_auth_email_identities_updated_at
    BEFORE UPDATE ON auth_email_identities
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();