"""`dwg_review.phases.report` 单元测试。"""

import json

import pytest

from dwg_review.phases.report import extract_issues, save_report, summarize
from tests.fakes import FakeLlmClient, make_ctx


def findings_fixture():
    return [
        {"frame": 1, "sheet": "A1", "finding": "图框1：文字重叠"},
        {"frame": 2, "sheet": "A3", "finding": "图框2：未发现明显问题"},
    ]


# ---------------------------------------------------------------------------
#  summarize
# ---------------------------------------------------------------------------
def test_summarize_empty_returns_message_without_llm():
    llm = FakeLlmClient(text="不应被调用")
    ctx = make_ctx(llm=llm)
    out = summarize(ctx, [], log=lambda *a: None)
    assert "未识别到可审查的图框" in out
    assert llm.calls == []


def test_summarize_uses_chat_text():
    llm = FakeLlmClient(text="## 总报告")
    ctx = make_ctx(llm=llm)
    assert summarize(ctx, findings_fixture(), log=lambda *a: None) == "## 总报告"
    assert len(llm.calls) == 1
    assert "图框1" in llm.calls[0]["user"]


def test_summarize_falls_back_to_raw_input_on_error():
    class Boom(FakeLlmClient):
        def chat_text(self, system, user, **kwargs):
            raise RuntimeError("汇总炸了")

    logs = []
    ctx = make_ctx(llm=Boom())
    out = summarize(ctx, findings_fixture(), log=logs.append)
    assert "图框1" in out and "图框2" in out
    assert any("汇总失败" in line for line in logs)


def test_summarize_missing_frame_key_known_gap():
    """已知瑕疵：summarize 用硬下标 f['frame']，findings 缺该键直接 KeyError。"""
    ctx = make_ctx(llm=FakeLlmClient(text="x"))
    with pytest.raises(KeyError):
        summarize(ctx, [{"finding": "缺 frame 键"}], log=lambda *a: None)


# ---------------------------------------------------------------------------
#  extract_issues
# ---------------------------------------------------------------------------
def test_extract_issues_empty_returns_empty_list():
    llm = FakeLlmClient(text_script=["[]"])
    ctx = make_ctx(llm=llm)
    assert extract_issues(ctx, [], log=lambda *a: None) == []
    assert llm.calls == []


def test_extract_issues_parses_json_array():
    payload = '[{"frame": 1, "handle": "A", "severity": "high", "message": "x"}]'
    llm = FakeLlmClient(text_script=[payload])
    ctx = make_ctx(llm=llm)
    issues = extract_issues(ctx, findings_fixture(), log=lambda *a: None)
    assert issues == [{"frame": 1, "handle": "A", "severity": "high", "message": "x"}]


def test_extract_issues_strips_code_fence():
    fenced = '```json\n[{"frame": 1, "message": "y"}]\n```'
    llm = FakeLlmClient(text_script=[fenced])
    ctx = make_ctx(llm=llm)
    assert extract_issues(ctx, findings_fixture(), log=lambda *a: None) == [
        {"frame": 1, "message": "y"}
    ]


def test_extract_issues_returns_empty_on_invalid_json():
    logs = []
    llm = FakeLlmClient(text_script=["这不是 JSON"])
    ctx = make_ctx(llm=llm)
    assert extract_issues(ctx, findings_fixture(), log=logs.append) == []
    assert any("结构化抽取失败" in line for line in logs)


def test_extract_issues_returns_empty_when_not_a_list():
    llm = FakeLlmClient(text_script=['{"frame": 1}'])
    ctx = make_ctx(llm=llm)
    assert extract_issues(ctx, findings_fixture(), log=lambda *a: None) == []


def test_extract_issues_single_line_fence_known_gap():
    """已知瑕疵：围栏剥离依赖换行，单行 ```json[...]``` 会残留 json 前缀 → 解析失败。"""
    llm = FakeLlmClient(text_script=['```json[{"frame": 1, "message": "z"}]```'])
    ctx = make_ctx(llm=llm)
    assert extract_issues(ctx, findings_fixture(), log=lambda *a: None) == []


def test_extract_issues_missing_frame_key_known_gap():
    """已知瑕疵：extract_issues 同样用硬下标 f['frame']，findings 缺该键直接 KeyError。"""
    ctx = make_ctx(llm=FakeLlmClient(text="[]"))
    with pytest.raises(KeyError):
        extract_issues(ctx, [{"finding": "缺 frame 键"}], log=lambda *a: None)


# ---------------------------------------------------------------------------
#  save_report
# ---------------------------------------------------------------------------
def test_save_report_writes_md_and_json(tmp_reports):
    findings = findings_fixture()
    plan = {"frames": [{"bbox": [0, 0, 10, 10]}]}
    issues = [{"frame": 1, "handle": "A", "message": "x"}]

    md_path, json_path = save_report("# 报告", findings, plan, issues, log=lambda *a: None)

    assert md_path.exists() and json_path.exists()
    assert md_path.read_text(encoding="utf-8") == "# 报告"
    data = json.loads(json_path.read_text(encoding="utf-8"))
    assert data["findings"] == findings
    assert data["issues"] == issues
    assert data["frames"] == plan["frames"]
    assert "generated_at" in data


def test_save_report_issues_default_to_empty(tmp_reports):
    _, json_path = save_report("md", findings_fixture(), {"frames": []}, log=lambda *a: None)
    assert json.loads(json_path.read_text(encoding="utf-8"))["issues"] == []


def test_save_report_creates_missing_directory(tmp_path, monkeypatch):
    from dwg_review import config

    target = tmp_path / "deep" / "nested"
    monkeypatch.setattr(config, "REPORT_DIR", target)
    save_report("md", [], {"frames": []}, log=lambda *a: None)
    assert target.is_dir()