using Newtonsoft.Json.Linq;

namespace AibisDream.SaveSystem
{
    /// <summary>
    /// 读盘后 <see cref="SaveSnapshot.sections"/> 中的值常为 <see cref="JObject"/>；
    /// 本类按 SaveId 转回各 Provider 所需的强类型 DTO。
    /// </summary>
    public static class SnapshotSectionDeserializer
    {
        /// <summary>若 dto 已是强类型则原样返回；若为 JObject 则 ToObject 到对应 DTO。</summary>
        public static object Coerce(string saveId, object dto)
        {
            if (dto is not JObject jobj)
            {
                return dto;
            }

            return saveId switch
            {
                SnapshotProviderIds.Scene => jobj.ToObject<SceneSnapshotDto>(),
                SnapshotProviderIds.Macro => jobj.ToObject<MacroSnapshotDto>(),
                SnapshotProviderIds.Environment => jobj.ToObject<EnvironmentSnapshotDto>(),
                SnapshotProviderIds.Actor => jobj.ToObject<ActorSnapshotDto>(),
                SnapshotProviderIds.Audio => jobj.ToObject<AudioSnapshotDto>(),
                SnapshotProviderIds.Timeline => jobj.ToObject<TimelineSnapshotDto>(),
                SnapshotProviderIds.Screen => jobj.ToObject<ScreenSnapshotDto>(),
                _ => jobj
            };
        }
    }
}