-- ==========================================
-- Switchboard Core — 006 Audit
-- ==========================================

CREATE TABLE IF NOT EXISTS audit_log (
    id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    actor_id        UUID REFERENCES users(id) ON DELETE SET NULL,
    action          VARCHAR(100) NOT NULL,
    resource_type   VARCHAR(50) NOT NULL,
    resource_id     VARCHAR(255),
    metadata        JSONB DEFAULT '{}'::jsonb,
    ip_address      VARCHAR(45),
    user_agent      TEXT DEFAULT '',
    created_at      TIMESTAMPTZ DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_audit_log_created ON audit_log(created_at DESC);
CREATE INDEX IF NOT EXISTS idx_audit_log_actor ON audit_log(actor_id) WHERE actor_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_audit_log_resource ON audit_log(resource_type, resource_id);
CREATE INDEX IF NOT EXISTS idx_audit_log_action ON audit_log(action);