"""Tests für Issue #3: Ghostscript 10.0.0–10.02.0 PDF/A-Bug-Erkennung."""
from __future__ import annotations

from unittest.mock import patch

import pytest

from pdf_ocr_hotfolder.service import (
    PreflightError,
    check_preflight,
    is_ghostscript_broken,
)


@pytest.mark.parametrize("version,expected", [
    # Betroffene Versionen
    ("10.0.0", True),
    ("10.00.0", True),
    ("10.01.0", True),
    ("10.01.1", True),
    ("10.01.2", True),
    ("10.02.0", True),
    # Sichere Versionen
    ("10.02.1", False),
    ("10.03.0", False),
    ("10.04.0", False),
    ("11.0.0", False),
    ("9.56.1", False),  # Debian 11 / Ubuntu 22.04
    ("9.55.0", False),
    # Edge cases
    ("", False),
    (None, False),
    ("garbage", False),
])
def test_is_ghostscript_broken(version, expected) -> None:
    assert is_ghostscript_broken(version) is expected


def test_check_preflight_without_pdfa_passes_with_broken_gs() -> None:
    """Ohne pdfa_level darf der betroffene GS verwendet werden."""
    with patch("pdf_ocr_hotfolder.service.shutil.which", return_value="/usr/bin/fake"), \
         patch("pdf_ocr_hotfolder.service.detect_ghostscript_version",
               return_value="10.0.0"):
        check_preflight(pdfa_level="")  # darf nicht werfen


def test_check_preflight_with_pdfa_fails_on_broken_gs() -> None:
    """Mit pdfa_level + kaputtem GS → PreflightError mit hilfreicher Meldung."""
    with patch("pdf_ocr_hotfolder.service.shutil.which", return_value="/usr/bin/fake"), \
         patch("pdf_ocr_hotfolder.service.detect_ghostscript_version",
               return_value="10.0.0"):
        with pytest.raises(PreflightError, match="Ghostscript 10.0.0"):
            check_preflight(pdfa_level="2")


def test_check_preflight_with_pdfa_passes_on_fixed_gs() -> None:
    """Mit pdfa_level + gefixtem GS → ok."""
    with patch("pdf_ocr_hotfolder.service.shutil.which", return_value="/usr/bin/fake"), \
         patch("pdf_ocr_hotfolder.service.detect_ghostscript_version",
               return_value="10.02.1"):
        check_preflight(pdfa_level="2")  # darf nicht werfen


def test_default_config_pdfa_level_is_empty() -> None:
    """Default-Config der Beispiel-Datei soll pdfa_level='' enthalten (Issue #3)."""
    from pathlib import Path
    import tomllib
    cfg_path = Path(__file__).parent.parent / "config.example.toml"
    with cfg_path.open("rb") as f:
        data = tomllib.load(f)
    assert data["ocr"]["pdfa_level"] == "", \
        "config.example.toml muss pdfa_level='' als sicheren Default haben"