CREATE TABLE IF NOT EXISTS room_creation_requests (
    id BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    requested_by BIGINT NOT NULL REFERENCES users(id) ON DELETE RESTRICT,
    name TEXT NOT NULL,
    description TEXT NOT NULL DEFAULT '',
    category_id BIGINT NULL REFERENCES room_categories(id) ON DELETE SET NULL,
    settings_payload JSONB,
    opaque_password_record BYTEA,
    opaque_password_credential_identifier BYTEA,
    opaque_password_ciphersuite VARCHAR(64),
    opaque_password_server_setup_version INTEGER,
    status SMALLINT NOT NULL,
    requested_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
    reviewed_at TIMESTAMPTZ,
    reviewed_by BIGINT REFERENCES users(id) ON DELETE RESTRICT,
    rejection_reason TEXT,

    CONSTRAINT room_creation_requests_opaque_password_metadata_required
        CHECK (
            (
                opaque_password_record IS NULL
                AND opaque_password_credential_identifier IS NULL
                AND opaque_password_ciphersuite IS NULL
                AND opaque_password_server_setup_version IS NULL
            )
            OR (
                opaque_password_record IS NOT NULL
                AND opaque_password_credential_identifier IS NOT NULL
                AND opaque_password_ciphersuite IS NOT NULL
                AND opaque_password_server_setup_version IS NOT NULL
            )
        ),
    CONSTRAINT room_creation_requests_opaque_password_record_not_empty
        CHECK (opaque_password_record IS NULL OR length(opaque_password_record) > 0),
    CONSTRAINT room_creation_requests_opaque_password_identifier_not_empty
        CHECK (
            opaque_password_credential_identifier IS NULL
            OR length(opaque_password_credential_identifier) > 0
        ),
    CONSTRAINT room_creation_requests_opaque_password_ciphersuite_not_empty
        CHECK (
            opaque_password_ciphersuite IS NULL
            OR length(trim(opaque_password_ciphersuite)) > 0
        ),
    CONSTRAINT room_creation_requests_opaque_password_setup_version_positive
        CHECK (
            opaque_password_server_setup_version IS NULL
            OR opaque_password_server_setup_version > 0
        ),
    CONSTRAINT room_creation_requests_settings_payload_object
        CHECK (
            settings_payload IS NULL
            OR jsonb_typeof(settings_payload) = 'object'
        ),
    CONSTRAINT room_creation_requests_rejection_reason_not_empty
        CHECK (
            rejection_reason IS NULL
            OR length(trim(rejection_reason)) > 0
        )
);

CREATE TABLE IF NOT EXISTS room_creation_request_labels (
    request_id BIGINT NOT NULL REFERENCES room_creation_requests(id) ON DELETE CASCADE,
    label_id BIGINT NOT NULL REFERENCES room_labels(id) ON DELETE RESTRICT,
    PRIMARY KEY (request_id, label_id)
);

CREATE INDEX IF NOT EXISTS idx_room_creation_requests_requested_by
    ON room_creation_requests(requested_by, requested_at DESC);

CREATE INDEX IF NOT EXISTS idx_room_creation_requests_status_requested
    ON room_creation_requests(status, requested_at DESC);

CREATE INDEX IF NOT EXISTS idx_room_creation_requests_reviewed_by
    ON room_creation_requests(reviewed_by)
    WHERE reviewed_by IS NOT NULL;

CREATE INDEX IF NOT EXISTS idx_room_creation_request_labels_label_request
    ON room_creation_request_labels(label_id, request_id);