"""`dwg_review.config` 单元测试（只验证纯函数与常量类型，不依赖真实环境变量）。"""

import os

from dwg_review import config


def test_resolve_path_relative_uses_project_root():
    assert config._resolve_path("reports") == config.PROJECT_ROOT / "reports"


def test_resolve_path_absolute_unchanged(tmp_path):
    assert config._resolve_path(str(tmp_path)) == tmp_path


def test_project_root_is_repo_root():
    assert (config.PROJECT_ROOT / "dwg_review" / "config.py").is_file()


def test_read_env_prefers_environ(monkeypatch):
    monkeypatch.setenv("CAD_TEST_ENV_PROBE", "hello")
    assert config._read_env("CAD_TEST_ENV_PROBE") == "hello"


def test_read_env_missing_returns_empty(monkeypatch):
    monkeypatch.delenv("CAD_TEST_DEFINITELY_MISSING_XYZ", raising=False)
    assert config._read_env("CAD_TEST_DEFINITELY_MISSING_XYZ") == ""


def test_has_api_key_reflects_module_value(monkeypatch):
    monkeypatch.setattr(config, "API_KEY", "")
    assert config.has_api_key() is False
    monkeypatch.setattr(config, "API_KEY", "sk-x")
    assert config.has_api_key() is True


def test_has_api_key_ignores_whitespace(monkeypatch):
    monkeypatch.setattr(config, "API_KEY", "   ")
    assert config.has_api_key() is False


def test_constants_have_expected_types():
    assert isinstance(config.HOST, str)
    assert isinstance(config.PORT, int)
    assert isinstance(config.CALL_TIMEOUT, float)
    assert isinstance(config.CALL_RETRIES, int)
    assert isinstance(config.MAX_FRAME_BYTES, int)
    assert isinstance(config.IMAGE_MAX_EDGE, int)
    assert isinstance(config.IMAGE_FORMAT, str)
    assert isinstance(config.CHECKLIST_PATH, type(config.PROJECT_ROOT))


def test_checklist_path_resolves_relative_to_root():
    assert config.CHECKLIST_PATH.name == "review_checklist.json"
    assert config.CHECKLIST_PATH.parent == config.PROJECT_ROOT


def test_port_default_matches_baseline():
    # 基座固定监听 127.0.0.1:8080；若此值被改动，请同步更新基座与文档。
    assert config.HOST == "127.0.0.1"
    assert config.PORT == 8080


def test_os_name_guard_in_read_env(monkeypatch):
    # 非 Windows 平台不应触碰注册表
    monkeypatch.setattr(os, "name", "posix")
    monkeypatch.delenv("CAD_TEST_ENV_PROBE2", raising=False)
    assert config._read_env("CAD_TEST_ENV_PROBE2") == ""