"""前置阻断：按 resolution 生成不同的问句，并保证「同角色顺带办」和「找别人办」两条路不会串。"""

from __future__ import annotations

from backend.orchestrator import orchestrator as orc


class TestPrerequisiteLookup:
    def test_finds_declared_prerequisite(self, business):
        step = business["workflow"][1]
        assert orc._prerequisite(step, "return_verification")["title"] == "返校核验"

    def test_unknown_id_returns_none(self, business):
        assert orc._prerequisite(business["workflow"][1], "没声明过的前置") is None

    def test_step_without_prerequisites(self):
        assert orc._prerequisite({"step_id": "x"}, "anything") is None


class TestBlockerQuestion:
    def test_self_resolution_offers_to_do_it_now(self, business):
        prereq = orc._prerequisite(business["workflow"][1], "profile_complete")
        question = orc._blocker_question(prereq, "请先完善个人信息")
        assert "完善个人信息" in question
        assert "顺带帮你办吗" in question
        assert "回复「是」" in question and "回复「否」" in question

    def test_other_role_says_it_cannot_be_done_here(self, business):
        prereq = orc._prerequisite(business["workflow"][1], "return_verification")
        question = orc._blocker_question(prereq, "存在未返校记录")
        assert "联系辅导员先完成返校核验" in question
        assert "替你办不了" in question
        assert "已处理" in question
        # 不能给出「我顺带帮你办」的承诺：这件事要别的角色在自己的客户端做
        assert "顺带帮你办吗" not in question

    def test_self_resolution_without_business_id_cannot_offer_to_do_it(self):
        # 声明了 self 但没给 business_id，系统里没有对应业务可跑，只能请用户自己处理
        prereq = {"id": "x", "title": "补充材料", "resolution": "self"}
        question = orc._blocker_question(prereq, "缺少材料")
        assert "顺带帮你办吗" not in question
        assert "已处理" in question

    def test_undeclared_prerequisite_still_gives_the_user_a_way_out(self):
        question = orc._blocker_question(None, "系统说必须先做某件事")
        assert "系统说必须先做某件事" in question
        assert "不在我知道的前置事项里" in question
        assert "已处理" in question and "取消" in question

    def test_message_from_the_page_is_always_quoted(self, business):
        prereq = orc._prerequisite(business["workflow"][1], "return_verification")
        assert "存在 3 条未返校记录" in orc._blocker_question(prereq, "存在 3 条未返校记录")

    def test_falls_back_to_id_when_title_missing(self):
        question = orc._blocker_question({"id": "return_verification", "resolution": "other_role"}, "msg")
        assert "return_verification" in question


class TestPrerequisitesBlock:
    def test_lists_prerequisites_for_the_prompt(self, business):
        block = orc._prerequisites_block(business["workflow"][1])
        assert "return_verification" in block and "profile_complete" in block

    def test_step_without_prerequisites_adds_nothing(self):
        assert orc._prerequisites_block({"step_id": "x"}) == ""