using NetDocsForLLM.Models;
using System;
using System.IO;
using System.Reflection;

namespace NetDocsForLLM.Services
{
    public interface IAssemblyAnalyzer
    {
        AssemblyModel LoadAssembly(string filePath);
    }

    public class AssemblyAnalyzer : IAssemblyAnalyzer
    {
        public AssemblyModel LoadAssembly(string filePath)
        {
            if (string.IsNullOrEmpty(filePath))
                throw new ArgumentException("Ruta de archivo no válida", nameof(filePath));

            if (!File.Exists(filePath))
                throw new FileNotFoundException($"No se encontró el archivo: {filePath}");

            var assemblyModel = new AssemblyModel(filePath);

            try
            {
                // Load assembly
                var assembly = Assembly.LoadFrom(filePath);
                assemblyModel.LoadedAssembly = assembly;
                assemblyModel.Name = assembly.GetName().Name;
                assemblyModel.Version = assembly.GetName().Version;

                // Check for XML documentation
                var xmlFilePath = Path.ChangeExtension(filePath, ".xml");
                if (File.Exists(xmlFilePath))
                {
                    assemblyModel.HasXmlDocumentation = true;
                    assemblyModel.XmlDocPath = xmlFilePath;
                }

                return assemblyModel;
            }
            catch (Exception ex)
            {
                throw new InvalidOperationException($"Error al cargar el ensamblado: {ex.Message}", ex);
            }
        }
    }
}