from __future__ import annotations

import json
from pathlib import Path

from syncgames.hashutil import tree_hash
from syncgames.store import FilesystemStore, empty_meta


def test_tree_hash_stable():
    a = {"b.bin": "sha256:aa", "a.bin": "sha256:bb"}
    b = {"a.bin": "sha256:bb", "b.bin": "sha256:aa"}
    assert tree_hash(a) == tree_hash(b)


def test_filesystem_roundtrip(tmp_path: Path):
    store = FilesystemStore(tmp_path / "ssot")
    game = "test-game"
    meta = empty_meta(game, 3)
    store.put_meta(game, meta)
    assert store.get_meta(game) is not None

    local = tmp_path / "wip"
    local.mkdir()
    (local / "save.dat").write_bytes(b"hello-save")
    checksums = store.upload_prefix(game, "live", "", local)
    assert "save.dat" in checksums

    dest = tmp_path / "down"
    got = store.download_live(game, dest)
    assert got["save.dat"].startswith("sha256:")
    assert (dest / "save.dat").read_bytes() == b"hello-save"

    store.upload_prefix(game, "history", "phone/20260101T000000Z", local)
    hist = store.list_history(game)
    assert any(h.startswith("phone/") for h in hist)

    probe = store.probe()
    assert probe.startswith("sha256:")


def test_meta_json_roundtrip(tmp_path: Path):
    store = FilesystemStore(tmp_path)
    m = empty_meta("g1")
    m.raw["lease"] = {
        "holder": "pc",
        "expires_at": "2099-01-01T00:00:00Z",
        "session_id": "x",
    }
    store.put_meta("g1", m)
    again = store.get_meta("g1")
    assert again is not None
    assert again.lease["holder"] == "pc"
    # ensure valid json file
    text = (tmp_path / "games" / "g1" / "meta.json").read_text()
    json.loads(text)