using DevDisciples.Json.Parser;
using DevDisciples.Parsing;
using Humanizer;

namespace DevDisciples.Json.Tools;

public static partial class Json2CSharpTranslator
{
    public static readonly VisitorContainer<ISyntaxNode, ITranslation> Visitors;

    static Json2CSharpTranslator()
    {
        Visitors = new();
        Visitors.Register<JsonObject>(JsonObjectTranslator.Translate);
        Visitors.Register<JsonArray>(JsonArrayTranslator.Translate);
        Visitors.Register<JsonString>(JsonStringTranslator.Translate);
        Visitors.Register<JsonNumber>(JsonNumberTranslator.Translate);
        Visitors.Register<JsonBool>(JsonBoolTranslator.Translate);
        Visitors.Register<JsonNull>(JsonNullTranslator.Translate);
    }

    public static string Translate(string source, Context? context = null)
    {
        if (JsonParser.Parse("<source>", source) is not JsonObject root)
            throw new Exception("Expected a JSON object.");

        context ??= new();

        var visitor = Visitors[typeof(JsonObject)];
        visitor(root, context, context.RootClassName);

        context.Builder.Append("//using System;\n");
        context.Builder.Append("//using System.Collections.Generic;\n");
        context.Builder.Append('\n');
        context.Builder.Append($"namespace {context.Namespace};\n\n");
        context.Classes.ForEach(@class => @class.Translate(context));

        return context.Builder.ToString();
    }

    private static Context ContextFromArgs(object[] args) => (args[0] as Context)!;

    private static string NameFromArgs(object[] args) => ((string)args[1]).Camelize();
}