from __future__ import annotations

from pathlib import Path

from src.engine import StoryEngine
from src.parser import parse_story
from src.storage import load_game


def test_save_and_load_roundtrip(tmp_path: Path) -> None:
    parsed = parse_story("data/main_story.yaml")
    engine = StoryEngine(parsed.story)

    # intro -> gate
    engine.choose(0)
    assert engine.current_node_id == "gate"

    save_path = tmp_path / "save.json"
    engine.save(save_path)

    payload = load_game(save_path)
    assert payload.story_id == parsed.story.story_id
    assert payload.current_node == "gate"

    engine2 = StoryEngine(parsed.story)
    engine2.load(save_path)
    assert engine2.current_node_id == "gate"
    assert engine2.state == engine.state