using System;
using System.IO;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace NetDocsForLLM.Helpers
{
    public static class DocFxHelper
    {
        public static async Task<string> CreateDocFxConfigAsync(string outputPath, params string[] assemblyPaths)
        {
            if (string.IsNullOrEmpty(outputPath))
                throw new ArgumentException("Ruta de salida no válida", nameof(outputPath));

            if (assemblyPaths == null || assemblyPaths.Length == 0)
                throw new ArgumentException("Debe proporcionar al menos una ruta de ensamblado", nameof(assemblyPaths));

            var configPath = Path.Combine(outputPath, "docfx.json");
            var config = GenerateDocFxConfigContent(assemblyPaths);

            try
            {
                await File.WriteAllTextAsync(configPath, config);
                return configPath;
            }
            catch (Exception ex)
            {
                throw new InvalidOperationException($"Error al crear configuración de DocFX: {ex.Message}", ex);
            }
        }

        private static string GenerateDocFxConfigContent(string[] assemblyPaths)
        {
            var files = string.Join("\",\n            \"", assemblyPaths.Select(p => p.Replace("\\", "\\\\")));
            
            return $@"
{{
  ""metadata"": [
    {{
      ""src"": [
        {{
          ""files"": [
            ""{files}""
          ],
          ""src"": "".""
        }}
      ],
      ""dest"": ""obj/api"",
      ""properties"": {{
        ""TargetFramework"": ""net6.0""
      }},
      ""disableGitFeatures"": true,
      ""disableDefaultFilter"": false
    }}
  ],
  ""build"": {{
    ""content"": [
      {{
        ""files"": [""*.yml""],
        ""src"": ""obj/api"",
        ""dest"": ""api""
      }}
    ],
    ""resource"": [
      {{
        ""files"": [""images/**""],
        ""exclude"": [""obj/**"", ""_site/**""]
      }}
    ],
    ""dest"": ""_site"",
    ""globalMetadataFiles"": [],
    ""fileMetadataFiles"": [],
    ""template"": [""default""],
    ""postProcessors"": [],
    ""markdownEngineName"": ""markdig"",
    ""noLangKeyword"": false,
    ""keepFileLink"": false,
    ""cleanupCacheHistory"": false,
    ""disableGitFeatures"": false
  }}
}}";
        }

        public static XDocument ParseXmlComments(string xmlPath)
        {
            if (string.IsNullOrEmpty(xmlPath) || !File.Exists(xmlPath))
                return null;

            try
            {
                return XDocument.Load(xmlPath);
            }
            catch (Exception)
            {
                return null;
            }
        }
    }
}