"""--region decides among the files --required-only keeps.

The regional choice ran over optional candidates too. In Batocera's Vic20
group the optional Japanese kernel won for --region jp, the required PAL
and NTSC kernels were dropped as beaten, and --required-only then removed
the optional winner: the slot shipped empty.
"""

from __future__ import annotations

import sys
import unittest
from pathlib import Path

REPO_ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(REPO_ROOT / "scripts"))


class RequiredOnlyBeforeRegion(unittest.TestCase):
    def test_optional_files_leave_the_groups(self):
        from packextras import platform_region_groups

        systems = {"vic20": {"files": [
            {"name": "kernel-ntsc.bin", "destination": "Vic20/kernel-ntsc.bin", "required": True},
            {"name": "kernel-japanese.bin", "destination": "Vic20/kernel-japanese.bin",
             "required": False},
        ]}}
        groups, _ = platform_region_groups(
            {}, systems, "emulators", None, "", {}, include_extras=False, required_only=True,
        )
        self.assertEqual(groups["vic20"], [("Vic20/kernel-ntsc.bin", "kernel-ntsc.bin")])

    def test_every_caller_passes_it(self):
        source = (REPO_ROOT / "scripts" / "generate_pack.py").read_text(encoding="utf-8")
        self.assertEqual(source.count("required_only=required_only,\n        )"), 2)


if __name__ == "__main__":
    unittest.main()