from pathlib import Path
from unittest import mock

import pytest

from speccpu import SPEC, find_build


class TestFindBuild:
    def test_find_build_success(self, tmpdir):
        # Create a mock directory structure with a build directory
        build_parent = Path(tmpdir)
        build_dir = build_parent / "build_2023"
        build_dir.mkdir()

        # Test that find_build correctly identifies the build directory
        found_dir = find_build(build_parent)
        assert found_dir == build_dir

    def test_find_build_multiple_dirs(self, tmpdir):
        # Create multiple build directories
        build_parent = Path(tmpdir)
        build_dir1 = build_parent / "build_2022"
        build_dir2 = build_parent / "build_2023"
        build_dir1.mkdir()
        build_dir2.mkdir()

        # Should find the alphabetically first one
        found_dir = find_build(build_parent)
        assert found_dir == build_dir1

    def test_find_build_no_dir(self, tmpdir):
        # Test the error case when no build directory exists
        build_parent = Path(tmpdir)
        with pytest.raises(RuntimeError):
            find_build(build_parent)


class TestSPEC:
    def test_init(self):
        spec_dir = Path("/path/to/spec")
        spec = SPEC(spec_dir)
        assert spec.dir == spec_dir

    def test_config_dir(self):
        spec_dir = Path("/path/to/spec")
        spec = SPEC(spec_dir)
        assert spec.config_dir == spec_dir / "config"

    def test_env(self):
        spec_dir = Path("/path/to/spec")
        spec = SPEC(spec_dir)
        with mock.patch("speccpu.create_spec_env") as mock_create_env:
            spec.env()
            mock_create_env.assert_called_once_with(spec_dir)

    def test_mkcmd_runcpu_default(self):
        spec = SPEC(Path("/path/to/spec"))
        cmd = spec.mkcmd_runcpu("myconfig", ["benchmark1", "benchmark2"])
        assert cmd == [
            "runcpu",
            "--setprocgroup",
            "-i",
            "ref",
            "-c",
            "myconfig",
            "benchmark1",
            "benchmark2",
        ]

    def test_mkcmd_runcpu_no_procgroup(self):
        spec = SPEC(Path("/path/to/spec"))
        cmd = spec.mkcmd_runcpu("myconfig", ["benchmark1"], setprocgroup=False)
        assert "--setprocgroup" not in cmd

    def test_mkcmd_runcpu_with_output_dir(self):
        spec = SPEC(Path("/path/to/spec"))
        output_dir = Path("/output/dir")
        cmd = spec.mkcmd_runcpu("myconfig", ["benchmark1"], output_root=output_dir)
        assert "--outputdir" in cmd
        assert str(output_dir) in cmd