-- B10执行计划、单元归属和原始交付；任务/尝试/费用继续由S02拥有。
CREATE TABLE evaluation.muse_experiment_execution (
    experiment_id uuid PRIMARY KEY REFERENCES evaluation.muse_experiment(experiment_id),
    request_hash text NOT NULL,
    plan jsonb NOT NULL,
    plan_hash text NOT NULL,
    created_at timestamptz NOT NULL DEFAULT clock_timestamp()
);
CREATE TABLE evaluation.muse_evaluation_unit (
    unit_id uuid PRIMARY KEY,
    experiment_id uuid NOT NULL REFERENCES evaluation.muse_experiment_execution(experiment_id),
    sample_id text NOT NULL,
    kind text NOT NULL CHECK(kind IN ('generation','comparison')),
    specification jsonb NOT NULL,
    specification_hash text NOT NULL,
    task_id uuid UNIQUE REFERENCES evaluation.muse_task(task_id)
);
CREATE TABLE evaluation.muse_evaluation_output (
    unit_id uuid PRIMARY KEY REFERENCES evaluation.muse_evaluation_unit(unit_id),
    task_id uuid NOT NULL REFERENCES evaluation.muse_task(task_id),
    attempt_id uuid NOT NULL,
    call_id text NOT NULL UNIQUE,
    user_input_hash text NOT NULL,
    output jsonb NOT NULL,
    output_hash text NOT NULL,
    evidence jsonb NOT NULL,
    created_at timestamptz NOT NULL DEFAULT clock_timestamp()
);
CREATE TRIGGER evaluation_execution_guard BEFORE UPDATE OR DELETE ON evaluation.muse_experiment_execution
FOR EACH ROW EXECUTE FUNCTION public.muse_guard_literary_history();
CREATE TRIGGER evaluation_output_guard BEFORE UPDATE OR DELETE ON evaluation.muse_evaluation_output
FOR EACH ROW EXECUTE FUNCTION public.muse_guard_literary_history();
CREATE FUNCTION evaluation.muse_guard_unit_binding() RETURNS trigger LANGUAGE plpgsql AS $$
BEGIN
    IF TG_OP='DELETE' THEN RAISE EXCEPTION 'evaluation unit is immutable'; END IF;
    IF OLD.task_id IS NOT NULL OR NEW.task_id IS NULL OR
       (to_jsonb(OLD)-'task_id') <> (to_jsonb(NEW)-'task_id') THEN
        RAISE EXCEPTION 'only first task binding is allowed';
    END IF;
    RETURN NEW;
END $$;
CREATE TRIGGER evaluation_unit_guard BEFORE UPDATE OR DELETE ON evaluation.muse_evaluation_unit
FOR EACH ROW EXECUTE FUNCTION evaluation.muse_guard_unit_binding();