-- 007_v0200_notifications.sql
-- Notification infrastructure (v0.20.0 Phase 1)

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);