"""WFW-9 M1 clarify_refine 契约测试：schema + spec 声明（路线A 两阶段之「问题」阶段）。

契约测试——构造符合 schema 的 mock 响应，校验字段/默认值/tier/读写权限。
ClarifyDecision：`{need_clarification, questions[≤1], verification?}`；
analyst 档、reads=()、writes=()。全字段带默认值守解析韧性（LLM 漏产字段降级为
need_clarification=false，不阻塞润色）。不联网、无 DB。
"""

from __future__ import annotations

import pytest
from pydantic import ValidationError
from ww_agents import (
    SPECS,
    AgentSpec,
    ClarifyDecision,
    ClarifyOption,
    ClarifyQuestion,
    clarify_refine_spec,
    clarify_rewrite_spec,
)

# ---- ClarifyDecision / ClarifyQuestion / ClarifyOption schema ----


def test_clarify_decision_parses_need_clarification_with_one_question() -> None:
    # Arrange：含糊 → 反问 1 问 + 3 个锚定选项 + 自由输入兜底
    mock = {
        "need_clarification": True,
        "questions": [
            {
                "question": "你想让这段更有张力，是指哪种方向？",
                "options": [
                    {"label": "加快节奏", "value": "把长句拆短，压缩铺陈，加快推进"},
                    {"label": "加重冲突", "value": "强化人物对立，增加正面交锋"},
                    {"label": "收紧对白", "value": "删掉旁白，让张力靠对话推进"},
                ],
                "allow_free_text": True,
            }
        ],
        "verification": None,
    }

    # Act
    decision = ClarifyDecision.model_validate(mock)

    # Assert
    assert decision.need_clarification is True
    assert len(decision.questions) == 1
    q = decision.questions[0]
    assert q.question.startswith("你想让这段")
    assert len(q.options) == 3
    assert q.options[0].label == "加快节奏"
    assert q.options[0].value.startswith("把长句拆短")
    assert q.allow_free_text is True
    assert decision.verification is None


def test_clarify_decision_parses_clear_with_verification() -> None:
    # 明确 → 不问、给确认语
    mock = {
        "need_clarification": False,
        "questions": [],
        "verification": "我会把第二句的被字句改成主动句，其余不动，对吗？",
    }
    decision = ClarifyDecision.model_validate(mock)
    assert decision.need_clarification is False
    assert decision.questions == []
    assert decision.verification is not None


def test_clarify_decision_all_fields_default_for_resilience() -> None:
    # 全字段默认值守解析韧性：空对象降级为 need_clarification=false（不问、放行）。
    decision = ClarifyDecision.model_validate({})
    assert decision.need_clarification is False
    assert decision.questions == []
    assert decision.verification is None


def test_clarify_question_options_default_empty_and_free_text_true() -> None:
    # 凑不出具体选项 → 空 options + 常驻自由输入兜底
    q = ClarifyQuestion.model_validate({"question": "你具体想改哪里？"})
    assert q.options == []
    assert q.allow_free_text is True


def test_clarify_option_requires_label_and_value() -> None:
    with pytest.raises(ValidationError):
        ClarifyOption.model_validate({"label": "加快节奏"})


def test_clarify_question_requires_question_text() -> None:
    with pytest.raises(ValidationError):
        ClarifyQuestion.model_validate({"options": []})


# ---- clarify_refine_spec 声明 ----


def test_clarify_refine_spec_is_analyst_tier() -> None:
    # 不变量 #2：含糊判别 + 反问构造用分析档，只声明 tier
    assert clarify_refine_spec.tier == "analyst"
    assert clarify_refine_spec.name == "clarify_refine"


def test_clarify_refine_spec_is_read_only() -> None:
    # 不变量 #3：只读——不读库真相源（材料端点注入）、不写任何表
    assert clarify_refine_spec.reads == ()
    assert clarify_refine_spec.writes == ()


def test_clarify_refine_spec_output_schema() -> None:
    assert clarify_refine_spec.output_schema is ClarifyDecision


def test_clarify_refine_spec_prompt_documents_at_most_one_question() -> None:
    # v1 硬上限 1 问 + 自由输入兜底须在教条里显式约束
    prompt = clarify_refine_spec.system_prompt
    assert "1 问" in prompt
    assert "自由输入" in prompt
    assert "防循环" in prompt


def test_clarify_refine_spec_is_agent_spec_and_immutable() -> None:
    assert isinstance(clarify_refine_spec, AgentSpec)
    with pytest.raises(ValidationError):
        clarify_refine_spec.tier = "writer"


# ---- clarify_rewrite_spec 声明（WFW-9 M2：整章重写预检澄清，镜像 clarify_refine）----


def test_clarify_rewrite_spec_is_analyst_tier() -> None:
    # 不变量 #2：整章含糊判别 + 反问构造用分析档，只声明 tier（不写 model）
    assert clarify_rewrite_spec.tier == "analyst"
    assert clarify_rewrite_spec.name == "clarify_rewrite"


def test_clarify_rewrite_spec_is_read_only() -> None:
    # 不变量 #3：只读——不读库真相源（材料端点注入）、不写任何表
    assert clarify_rewrite_spec.reads == ()
    assert clarify_rewrite_spec.writes == ()


def test_clarify_rewrite_spec_output_schema_reuses_clarify_decision() -> None:
    # 复用 ClarifyDecision（不新增 schema），与 refine 侧同构
    assert clarify_rewrite_spec.output_schema is ClarifyDecision


def test_clarify_rewrite_spec_prompt_documents_constraints() -> None:
    # v1 硬上限 1 问 + 自由输入兜底 + 防循环须在教条里显式约束（与 refine 侧同纪律）
    prompt = clarify_rewrite_spec.system_prompt
    assert prompt  # 非空
    assert "1 问" in prompt
    assert "自由输入" in prompt
    assert "防循环" in prompt


def test_clarify_rewrite_spec_registered_in_specs() -> None:
    # 注册表同一实例（兼容期 *_spec 与 SPECS[name] 为同对象，不变量）
    assert SPECS["clarify_rewrite"] is clarify_rewrite_spec


def test_clarify_rewrite_spec_is_agent_spec_and_immutable() -> None:
    assert isinstance(clarify_rewrite_spec, AgentSpec)
    with pytest.raises(ValidationError):
        clarify_rewrite_spec.tier = "writer"