-- ==========================================
-- Chat Switchboard — 011 Notifications
-- ==========================================
-- Notification delivery and per-user preferences.
-- ICD §12 (Notifications)
-- ==========================================

-- =========================================
-- NOTIFICATIONS
-- =========================================

CREATE TABLE IF NOT EXISTS notifications (
    id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id         UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    type            VARCHAR(50) NOT NULL,
    title           VARCHAR(255) NOT NULL,
    body            TEXT DEFAULT '',
    resource_type   VARCHAR(50),
    resource_id     UUID,
    is_read         BOOLEAN DEFAULT false,
    created_at      TIMESTAMPTZ DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_notifications_user_unread ON notifications(user_id, is_read, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_notifications_user_created ON notifications(user_id, created_at DESC);


-- =========================================
-- NOTIFICATION PREFERENCES
-- =========================================

CREATE TABLE IF NOT EXISTS notification_preferences (
    id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id     UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    type        VARCHAR(50) NOT NULL,
    in_app      BOOLEAN NOT NULL DEFAULT true,
    email       BOOLEAN NOT NULL DEFAULT false,
    UNIQUE(user_id, type)
);

CREATE INDEX IF NOT EXISTS idx_notification_prefs_user ON notification_preferences(user_id);