using AutoBet.ApiGenerator.Extensions;
using System;
using System.IO;
using System.Text;
using System.Xml.Linq;

namespace AutoBet.ApiGenerator
{
    internal class ApiEnumsGenerator
    {
        public string _inputXmlFile { get; }
        public string _outputFilesDirectory { get; }

        public ApiEnumsGenerator(string inputXmlFile, string outputFilesDirectory)
        {
            _inputXmlFile = inputXmlFile;
            _outputFilesDirectory = outputFilesDirectory;
        }

        internal void Process(string namespaceValue, string modelFolder, string enumFolder)
        {
            var doc = XDocument.Load(_inputXmlFile);
            var nodes = doc.Root.Elements("simpleType");
            namespaceValue += $".{modelFolder}.{enumFolder}";
            var enumsDirectory = Path.Combine(_outputFilesDirectory, modelFolder, enumFolder);
            Directory.CreateDirectory(enumsDirectory);

            foreach (var node in nodes)
            {
                var sb = new StringBuilder();
                
                CSharpClassBuilder.UsingHeader(sb, namespaceValue, "System.Runtime.Serialization");
                var descriptionNode = node.Element("description");
                if (descriptionNode != null && !String.IsNullOrWhiteSpace(descriptionNode.Value))
                {
                    CSharpClassBuilder.Summary(sb, descriptionNode.Value, isClassSummary: true);
                }

                var name = node.Attribute("name").Value;
                CSharpClassBuilder.EnumHeader(sb, name);
                var validValues = node.Element("validValues");
                if (validValues == null)
                {
                    continue;
                }

                var enumValues = validValues.Elements("value");
                foreach(var enumValue in enumValues)
                {
                    var parameterName = enumValue.Attribute("name").Value;
                    sb.AppendWithIndent(8, "");
                    sb.AppendFormat("[EnumMember(Value = \"{0}\")]", parameterName);
                    sb.AppendLine();
                    sb.AppendWithIndent(8, "");

                    var upperCaseNextLetter = true;
                    for (var i = 0; i < parameterName.Length; i++)
                    {
                        if (upperCaseNextLetter)
                        {
                            upperCaseNextLetter = false;
                            sb.Append(Char.ToUpper(parameterName[i]));
                            continue;
                        }

                        if(parameterName[i] == '_')
                        {
                            upperCaseNextLetter = true;
                            continue;
                        }

                        sb.Append(Char.ToLower(parameterName[i]));
                    }
                    sb.Append(',');
                    sb.AppendLine();
                }

                sb.Remove(sb.Length - 3, 3);
                sb.AppendLine();
                CSharpClassBuilder.ClassFooter(sb);
                CSharpClassBuilder.UsingFooter(sb);

                File.WriteAllText(Path.Combine(enumsDirectory, $"{name}.cs"), sb.ToString());
            }
        }


    }
}