import pytest

from scripts.msvc_harness.config import load_config
from scripts.msvc_harness.discovery import DiscoveryError, discover_project
from scripts.msvc_harness.models import ProjectKind


def test_discover_project_skips_empty_repository(tmp_path):
    result = discover_project(tmp_path, load_config(tmp_path))

    assert result.selection is None


def test_discover_project_prefers_cmake(tmp_path):
    cmake_lists = tmp_path / "CMakeLists.txt"
    cmake_lists.write_text("cmake_minimum_required(VERSION 3.25)\n", encoding="utf-8")
    (tmp_path / "fallback.sln").write_text("", encoding="utf-8")

    result = discover_project(tmp_path, load_config(tmp_path))

    assert result.selection is not None
    assert result.selection.kind is ProjectKind.CMAKE
    assert result.selection.project_file == cmake_lists


def test_discover_project_rejects_orphan_cpp_project(tmp_path):
    (tmp_path / "orphan.cpp").write_text("int value = 0;\n", encoding="utf-8")

    with pytest.raises(DiscoveryError, match="C/C\\+\\+ files exist"):
        discover_project(tmp_path, load_config(tmp_path))