-- 全书声音候选与确认版本；人物语言指纹仍归B02。
CREATE TABLE public.muse_voice_proposal (
    proposal_id uuid PRIMARY KEY,
    author_id text NOT NULL,
    work_id text NOT NULL REFERENCES public.muse_work(work_id),
    revision bigint NOT NULL DEFAULT 1 CHECK (revision = 1),
    base_revision bigint NOT NULL CHECK (base_revision >= 0),
    request jsonb NOT NULL CHECK (jsonb_typeof(request) = 'object'),
    proposal_hash text NOT NULL,
    created_at timestamptz NOT NULL DEFAULT clock_timestamp()
);
CREATE TABLE public.muse_voice_version (
    version_id uuid PRIMARY KEY,
    work_id text NOT NULL REFERENCES public.muse_work(work_id),
    revision bigint NOT NULL CHECK (revision > 0),
    proposal_id uuid NOT NULL UNIQUE REFERENCES public.muse_voice_proposal(proposal_id),
    content_hash text NOT NULL,
    effective_schema_hash text NOT NULL,
    projection_version text NOT NULL,
    created_at timestamptz NOT NULL DEFAULT clock_timestamp(),
    UNIQUE (work_id, revision),
    UNIQUE (work_id, version_id)
);
CREATE TABLE public.muse_voice_current (
    work_id text PRIMARY KEY REFERENCES public.muse_work(work_id),
    version_id uuid NOT NULL,
    FOREIGN KEY (work_id, version_id) REFERENCES public.muse_voice_version(work_id, version_id)
);
CREATE FUNCTION public.muse_guard_voice_history() RETURNS trigger LANGUAGE plpgsql AS $$
BEGIN
    RAISE EXCEPTION '声音提案与历史版本只追加，不改写或删除';
END;
$$;
CREATE TRIGGER muse_voice_proposal_guard BEFORE UPDATE OR DELETE ON public.muse_voice_proposal
FOR EACH ROW EXECUTE FUNCTION public.muse_guard_voice_history();
CREATE TRIGGER muse_voice_version_guard BEFORE UPDATE OR DELETE ON public.muse_voice_version
FOR EACH ROW EXECUTE FUNCTION public.muse_guard_voice_history();