using System.Collections;
using UnityEngine;

namespace AibisDream.SaveSystem
{
    /// <summary>
    /// sections["subway"]：地铁场景宏观状态（SubwayCenter）。
    /// RestoreOrder=64，在 timeline(60) 之后、fix(65) 之前。
    /// </summary>
    public class SubwaySnapshotProvider : IAsyncSnapshotProvider
    {
        public string SaveId => SnapshotProviderIds.Subway;
        public int RestoreOrder => 64;

        public object Capture()
        {
            if (SubwayCenter.Instance == null)
            {
                Debug.LogWarning("[SubwaySnapshotProvider] SubwayCenter 未初始化，跳过捕获。");
                return null;
            }

            return SubwayCenter.Instance.CaptureSnapshot();
        }

        public IEnumerator RestoreAsync(object dto, SnapshotRestoreContext context)
        {
            if (dto is not SubwaySnapshotDto subway)
            {
                context.Warn("[SubwaySnapshotProvider] DTO 类型不匹配，跳过还原。");
                yield break;
            }

            if (SubwayCenter.Instance == null)
            {
                context.Warn("[SubwaySnapshotProvider] SubwayCenter 未初始化，跳过还原。");
                yield break;
            }

            yield return SubwayCenter.Instance.RestoreSnapshot(subway);
        }
    }
}