from pathlib import Path

from extract_and_rename import (
    check_dependencies,
    check_external_tools,
    select_template_file,
)


def test_select_template_file_picks_first_by_name(tmp_path):
    (tmp_path / "b_template.png").write_bytes(b"x")
    (tmp_path / "a_template.png").write_bytes(b"x")
    (tmp_path / "note.txt").write_bytes(b"x")  # 対象外拡張子

    result = select_template_file(tmp_path)

    assert result == tmp_path / "a_template.png"


def test_select_template_file_no_candidates_raises(tmp_path):
    (tmp_path / "note.txt").write_bytes(b"x")

    try:
        select_template_file(tmp_path)
        assert False, "FileNotFoundErrorが送出されるべき"
    except FileNotFoundError:
        pass


def test_check_dependencies_detects_missing_module():
    result = check_dependencies(("this_module_does_not_exist_xyz",))
    assert result == ["this_module_does_not_exist_xyz"]


def test_check_dependencies_detects_installed_module():
    result = check_dependencies(("os",))
    assert result == []


def test_check_external_tools_detects_missing(tmp_path):
    tesseract = tmp_path / "tools" / "tesseract" / "tesseract.exe"
    poppler = tmp_path / "tools" / "poppler" / "pdftoppm.exe"

    result = check_external_tools(tesseract, poppler)

    assert str(tesseract) in result
    assert str(poppler) in result


def test_check_external_tools_all_present(tmp_path):
    tesseract = tmp_path / "tesseract.exe"
    poppler = tmp_path / "pdftoppm.exe"
    tesseract.write_bytes(b"x")
    poppler.write_bytes(b"x")

    result = check_external_tools(tesseract, poppler)

    assert result == []