from __future__ import annotations

import importlib.util
from pathlib import Path
import sys
import unittest
from unittest import mock


SCRIPT = Path(__file__).resolve().parents[1] / "scripts" / "preflight.py"
sys.path.insert(0, str(SCRIPT.parent))
SPEC = importlib.util.spec_from_file_location("materialsub_preflight", SCRIPT)
assert SPEC is not None and SPEC.loader is not None
preflight = importlib.util.module_from_spec(SPEC)
SPEC.loader.exec_module(preflight)


class PreflightTests(unittest.TestCase):
    def dependencies(self):
        return mock.patch.object(
            preflight.shutil,
            "which",
            side_effect=lambda name: f"/bin/{name}" if name != "deno" else None,
        )

    def test_missing_font_requires_early_decision(self) -> None:
        with self.dependencies(), mock.patch.object(
            preflight.burn, "_required_executables", return_value=("/bin/ffmpeg", "/bin/ffprobe")
        ), mock.patch.object(
            preflight.burn, "_require_libass_subtitles_filter"
        ), mock.patch.object(preflight.burn, "_font_installed", return_value=False):
            exit_code, result = preflight.assess(
                font="MiSans", allow_missing_font=False, youtube=False
            )

        self.assertEqual(exit_code, 3)
        self.assertEqual(result["stage"], "font_decision_required")

    def test_missing_font_can_accept_substitution_upfront(self) -> None:
        with self.dependencies(), mock.patch.object(
            preflight.burn, "_required_executables", return_value=("/bin/ffmpeg", "/bin/ffprobe")
        ), mock.patch.object(
            preflight.burn, "_require_libass_subtitles_filter"
        ), mock.patch.object(preflight.burn, "_font_installed", return_value=False):
            exit_code, result = preflight.assess(
                font="MiSans", allow_missing_font=True, youtube=True
            )

        self.assertEqual(exit_code, 0)
        self.assertTrue(result["substitution_allowed"])
        self.assertTrue(any("Deno" in item for item in result["warnings"]))


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