using System.Text;
using Microsoft.CodeAnalysis;

namespace Polonium.Generators.Generators;
[Generator]
public class SendMessageMethodGenerator : AssetProcessGenerator
{
    public override void Execute(GeneratorExecutionContext context)
    {
        if (context.SyntaxReceiver is not ClassSyntaxReceiver receiver)
            return;
        Compilation compilation = context.Compilation;
        INamedTypeSymbol? ifc = compilation.GetTypeByMetadataName("Polonium.Interfaces.IMessageClient");
        foreach (ClassInfo cls in GetClassesWithInterface(context, ifc))
        {
            StringBuilder sb = new();
            sb
                .AppendLine("using Polonium.Interfaces;")
                .AppendLine("using System;")
                .AppendLine("using Polonium.Resources;")
                .AppendLine("using Polonium.MessageManager;")
                .AppendLine($"namespace {cls.Namespace};")
                .AppendLine($"public partial class {cls.ClassName}")
                .AppendLine("{")
                .AppendLine("    public event IMessageClient.MessageSentEventHandler MessageSent;")
                .AppendLine("    public void SendMessage(PoloniumMessage msg) => MessageSent?.Invoke(msg); ")
                .AppendLine("}");
            context.AddSource($"{cls.ClassName}_MessageClient.g.cs", sb.ToString());
        }
    }
}