using Newtonsoft.Json.Linq;

namespace Babushka.scripts.CSharp.GameEntity.LoadSave;

public static class EntityLoadSaveUtil
{
    private static void AssertTokenType(this JObject json, string key, JTokenType type)
    {
        var token = json[key];
        if (token == null) throw new MalformedJsonException(json, key, "does not exist");
        //if (!token.HasValues) throw new MalformedJsonException(json, key, "has no value");
        if (token.Type != type) throw new MalformedJsonException(json, key, $"is not of type {type}");
    }

    public static long GetLongValue(this JObject json, string key)
    {
        AssertTokenType(json, key, JTokenType.Integer);
        return json.Value<long>(key);
    }
    
    public static int GetIntValue(this JObject json, string key)
    {
        AssertTokenType(json, key, JTokenType.Integer);
        return json.Value<int>(key);
    }
    
    public static float GetFloatValue(this JObject json, string key)
    {
        AssertTokenType(json, key, JTokenType.Float);
        return json.Value<float>(key);
    }

    public static JObject GetObject(this JObject json, string key)
    {
        AssertTokenType(json, key, JTokenType.Object);
        return json.Value<JObject>(key)!;
    }
    
    public static string GetStringValue(this JObject json, string key)
    {
        AssertTokenType(json, key, JTokenType.String);
        return json.Value<string>(key)!;
    }
}