"""A platform's pinned revision found in its upstream history.

RetroArch pins ScummVM's queen.tbl and FBNeo's hiscore.dat at revisions
today's upstream no longer carries; the bytes are in the project's history.
"""

from __future__ import annotations

import hashlib
import sys
import unittest
from pathlib import Path
from unittest import mock

REPO_ROOT = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(REPO_ROOT / "scripts"))

import find_pinned_revision  # noqa: E402
import upstream  # noqa: E402


class ThePinnedRevisionIsInTheHistory(unittest.TestCase):
    def test_the_newest_matching_revision_is_returned(self):
        repo = upstream.parse_repo("https://github.com/scummvm/scummvm")
        blobs = {"c3": b"today", "c2": b"pinned", "c1": b"older"}

        def api(url, *_a, **_k):
            return [{"sha": s} for s in blobs] if "page=1" in url else []

        def fetch(url, *_a, **_k):
            return next(data for sha, data in blobs.items() if f"/{sha}/" in url)

        with mock.patch.object(upstream, "_api", api), mock.patch.object(upstream, "_fetch", fetch):
            found = find_pinned_revision.find_revision(
                repo, "dists/engine-data/queen.tbl",
                hashlib.md5(b"pinned").hexdigest(), "unused")
            missing = find_pinned_revision.find_revision(
                repo, "dists/engine-data/queen.tbl", "0" * 32, "unused")
        self.assertEqual(found, ("c2", b"pinned"))
        self.assertIsNone(missing)


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