-- Showcase fields for game catalog / public session browsing.

ALTER TABLE sessions
    ADD COLUMN is_one_shot BOOLEAN NOT NULL DEFAULT false,
    ADD COLUMN system VARCHAR(50),
    ADD COLUMN description TEXT,
    ADD COLUMN cover_image_url TEXT,
    ADD COLUMN duration_minutes INTEGER,
    ADD COLUMN format VARCHAR(20) CHECK (format IN ('Online', 'Offline', 'Hybrid')),
    ADD COLUMN allow_direct_registration BOOLEAN NOT NULL DEFAULT false;

CREATE INDEX ix_sessions_showcase
    ON sessions (scheduled_at, system, is_one_shot, format)
    WHERE is_public = true AND status <> 'Cancelled';