using System;

using MfGames.Gallium;
using MfGames.Nitride.Contents;

using Newtonsoft.Json;

namespace MfGames.Nitride.Json;

public static class NitrideJsonEntityExtensions
{
    /// <summary>
    /// Parses the entity text as a JSON file and returns the results.
    /// </summary>
    public static TType? GetTextContentJson<TType>(
        this Entity entity,
        Action<JsonSerializerSettings> configure)
    {
        JsonSerializerSettings settings = new();

        configure.Invoke(settings);

        return entity.GetTextContentJson<TType>(settings);
    }

    /// <summary>
    /// Parses the entity text as a JSON file and returns the results.
    /// </summary>
    public static TType? GetTextContentJson<TType>(
        this Entity entity,
        JsonSerializerSettings? settings = null)
    {
        string? text = entity.GetTextContentString();

        return text != null
            ? JsonConvert.DeserializeObject<TType>(text, settings)
            : default;
    }

    /// <summary>
    /// Sets the text content to the serialized value. If this is null, then
    /// the text content is removed. This uses the default serializer which
    /// may be configured.
    /// </summary>
    /// <returns>The same entity for chaining methods.</returns>
    public static Entity SetTextContentJson<TType>(
        this Entity entity,
        TType? value,
        Action<JsonSerializerSettings> configure)
    {
        JsonSerializerSettings settings = new();

        configure.Invoke(settings);

        return SetTextContentJson(entity, value, settings);
    }

    /// <summary>
    /// Sets the text content to the serialized value using the serializer
    /// provided. If the value is null, then the text content is removed.
    /// </summary>
    /// <returns>The same entity for chaining methods.</returns>
    public static Entity SetTextContentJson<TType>(
        this Entity entity,
        TType? value,
        JsonSerializerSettings? settings = null)
    {
        if (value == null)
        {
            return entity.Remove<ITextContent>();
        }

        string json = JsonConvert.SerializeObject(value, settings);

        return entity.SetTextContent(json);
    }
}