-- Migration 191: Per-user menu visibility preferences

CREATE TABLE IF NOT EXISTS user_menu_preferences (
    id SERIAL PRIMARY KEY,
    user_id INTEGER NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
    menu_key VARCHAR(120) NOT NULL,
    visible BOOLEAN NOT NULL DEFAULT TRUE,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    UNIQUE (user_id, menu_key)
);

CREATE INDEX IF NOT EXISTS idx_user_menu_preferences_user_id
    ON user_menu_preferences(user_id);

CREATE INDEX IF NOT EXISTS idx_user_menu_preferences_menu_key
    ON user_menu_preferences(menu_key);

CREATE OR REPLACE FUNCTION update_user_menu_preferences_updated_at()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1
        FROM pg_trigger
        WHERE tgname = 'user_menu_preferences_updated_at_trigger'
    ) THEN
        CREATE TRIGGER user_menu_preferences_updated_at_trigger
            BEFORE UPDATE ON user_menu_preferences
            FOR EACH ROW
            EXECUTE FUNCTION update_user_menu_preferences_updated_at();
    END IF;
END;
$$;