using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Microsoft.Build.Framework;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Polonium.Tasks;


// ReSharper disable once CheckNamespace
public class GenerateRegistryPassThrough : PoloniumTask
{
    [Required] public string ProjectDir { get; set; }

    public override bool Execute()
    {
        try
        {
            StringBuilder sb = new();
            
            string csFile = Directory
                .GetFiles($"{ProjectDir}src", "PoloniumRegistry.cs", SearchOption.TopDirectoryOnly)
                .FirstOrDefault();
            string code = File.ReadAllText(csFile!);
            sb.AppendLine("#pragma warning disable IDE0130"); 
            foreach (string use in GetUsings(code)) 
                sb.AppendLine(use); 
            sb
                .AppendLine("using System.Collections.Generic;")
                .AppendLine("// ReSharper disable once CheckNamespace")
                .AppendLine("public static partial class GlobalRegistry")
                .AppendLine("{");
            
            SyntaxTree tree = CSharpSyntaxTree.ParseText(code);
            CompilationUnitSyntax root = tree.GetCompilationUnitRoot();
            ClassDeclarationSyntax clas = root
                .DescendantNodes()
                .OfType<ClassDeclarationSyntax>()
                .FirstOrDefault(cls => cls.Identifier.Text == "PoloniumRegistry");
            IEnumerable<PropertyDeclarationSyntax> properties = clas?.Members
                .OfType<PropertyDeclarationSyntax>()
                .Where(m => m.AttributeLists
                    .SelectMany(a => a.Attributes)
                    .Any(a => a.Name.ToString() == "RegistryPassThrough"));
            if (properties is null)
                return false;
            foreach (PropertyDeclarationSyntax property in properties)
            {
                if (HasGetterOnly(property))
                    sb.AppendLine($"    public static {GetDisplayName(property.Type)} {property.Identifier.ToString()} => PoloniumRegistry.{property.Identifier.ValueText};");
                else
                {
                    sb
                        .AppendLine($"    public static {GetDisplayName(property.Type)} {property.Identifier.ToString()}")
                        .AppendLine("    {")
                        .AppendLine($"        get => PoloniumRegistry.{property.Identifier.ValueText};")
                        .AppendLine($"        set => PoloniumRegistry.{property.Identifier.ValueText} = value;")
                        .AppendLine("    }");
                }
            }

            sb
                .AppendLine("}")
                .AppendLine("#pragma warning restore IDE0130");
            File.WriteAllText($"{ProjectDir}Package/embedded/Patches/RegistryPassThrough.p.cs", sb.ToString());
            return true;
        }
        catch (Exception e)
        {
            Log.LogErrorFromException(e);
            return false;
        }
    }

}