using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

using EnvDTE;

using Microsoft.VisualStudio.Shell;

using VberAdmin.Models;

namespace VberAdmin.Generating
{
    public class Generator
    {
        private DTE Dte { get; }
        public TemplateViewModel ViewModel { get; set; }
        private IFileCreate Creator { get; set; }

        public Generator(DTE dte, IFileCreate creator)
        {
            ThreadHelper.ThrowIfNotOnUIThread();
            Dte = dte;
            ViewModel = GetViewModel();
            Creator = creator;
        }

        /// <summary>
        /// 执行生成文件
        /// </summary>
        public async Task ExecuteAsync()
        {
            await Creator.CreateAsync(ViewModel);
        }

        #region 获取模板模型

        /// <summary>
        /// 获取模板模型
        /// </summary>
        /// <returns></returns>
        private TemplateViewModel GetViewModel()
        {
            ThreadHelper.ThrowIfNotOnUIThread();
            Document doc = Dte.ActiveDocument;
            var projectItem = doc.ProjectItem;
            var project = projectItem.ContainingProject;
            TemplateViewModel model = new TemplateViewModel
            {
                ProjectName = project.Name.Replace(".Core", ""),
                BaseFolder = doc.Path
            };
            TextSelection sel = (TextSelection)doc.Selection;
            // ReSharper disable once SuspiciousTypeConversion.Global
            if (sel.ActivePoint.CodeElement[vsCMElement.vsCMElementClass] is CodeClass codeClass)
            {
                model.ClassNamespace = codeClass.Namespace.Name;
                model.HtmlPageTitle = ConvertDocComment(codeClass.DocComment);
                model.HtmlModalTitle = model.HtmlPageTitle;
                model.ClassName = codeClass.Name;
                foreach (CodeElement element in codeClass.Bases)
                {
                    string name = element.FullName ?? "";
                    string typeStr = Regex.Match(name, "(?<=<).*?(?=>)").Value;
                    if (typeStr.Contains("System.Int32"))
                    {
                        model.IdType = "int";
                    }
                    else if (typeStr.Contains("System.Int64"))
                    {
                        model.IdType = "long";
                    }
                    else if (typeStr.Contains("System.String"))
                    {
                        model.IdType = "string";
                    }
                    else if (typeStr.Contains("System.Guid"))
                    {
                        model.IdType = "Guid";
                    }

                    if (!string.IsNullOrEmpty(model.IdType))
                        break;
                }
                model.Columns = new List<ColumnViewModel>();
                foreach (CodeElement elem in codeClass.Members)
                {
                    if (elem.Kind == vsCMElement.vsCMElementProperty)
                    {
                        // ReSharper disable once SuspiciousTypeConversion.Global
                        if (elem is CodeProperty cp)
                        {
                            var attrType = cp.Type.AsString?.ToLower() ?? "";
                            if (attrType.Contains("string") || attrType.Contains("int") || attrType.Contains("datetime") || attrType.Contains("long") || attrType.Contains("bool") || attrType.Contains("decimal") || attrType.Contains("short") || attrType.Contains("double") || attrType.Contains("float") || attrType.Contains("guid"))
                            {
                                var column = new ColumnViewModel
                                {
                                    ColumnName = cp.Name,
                                    Comment = ConvertDocComment(cp.DocComment),
                                    AttrType = cp.Type.AsString?.Replace("System.", ""),
                                    IsGenreated = cp.Name != "CreatorUser" && cp.Name != "LastModifierUser" &&
                                                  cp.Name != "DeleterUser"
                                };
                                if (cp.Attributes != null)
                                {
                                    foreach (CodeElement element in cp.Attributes)
                                    {
                                        // ReSharper disable once SuspiciousTypeConversion.Global
                                        CodeAttribute ca = element as CodeAttribute;
                                        if (ca?.Name == "Required")
                                        {
                                            column.IsRequired = true;
                                        }
                                        if (ca?.Name == "MaxLength" || ca?.Name == "StringLength")
                                        {
                                            column.MaxLengthStr = ca.Value;
                                        }
                                    }
                                }
                                model.Columns.Add(column);
                            }
                        }
                    }
                    //else if (elem.Kind == vsCMElement.vsCMElementVariable)
                    //{
                    //    CodeVariable cv = elem as CodeVariable;
                    //    if (cv != null && cv.Name == "ParentPath")
                    //    {
                    //    }
                    //
                    //}
                    // Debug.WriteLine($"【CodeElement】 :value[{elem.Kind.ToString()}]");
                }
            }
            return model;
        }

        /// <summary>
        /// 获取注释
        /// </summary>
        /// <param name="docComment"></param>
        /// <returns></returns>
        private string ConvertDocComment(string docComment)
        {
            string newComment = docComment.Replace("<doc>\r\n<summary>\r\n", "").Replace("\r\n</summary>\r\n</doc>", "");
            return newComment;
        }

        //private void CodeClass(CodeClass cls)
        //{
        //    string name = cls.Name;
        //    string classNamespace = cls.Namespace.Name;
        //    string comment = cls.Comment;
        //    string docComment = cls.DocComment;
        //    string infoLocation = cls.InfoLocation.ToString();
        //    Debug.WriteLine($"【CodeClass】--[Name:{name}]--[Namespace:{classNamespace}]--[Comment:{comment}]--[DocComment:{docComment}]--[InfoLocation:{infoLocation}]");
        //}

        #endregion 获取模板模型

        #region 创建文件

        ///// <summary>
        ///// 生成DTO
        ///// </summary>
        //private void CreateDtos()
        //{
        //    ThreadHelper.ThrowIfNotOnUIThread();
        //    List<string> dtoFiles = new List<string>();
        //    if (ViewModel.IsCreateDto)
        //    {
        //        if (CreateT4<CreateDto>(ViewModel.CreateDtoName))
        //            dtoFiles.Add(ViewModel.DtoFolder + ViewModel.CreateDtoName);
        //    }
        //    if (ViewModel.IsUpdateDto)
        //    {
        //        if (CreateT4<UpdateDto>(ViewModel.UpdateDtoName))
        //            dtoFiles.Add(ViewModel.DtoFolder + ViewModel.UpdateDtoName);
        //    }
        //    if (ViewModel.IsUpdateDto)
        //    {
        //        if (CreateT4<ListDto>(ViewModel.ListDtoName))
        //            dtoFiles.Add(ViewModel.DtoFolder + ViewModel.ListDtoName);
        //    }
        //    if (dtoFiles.Any())
        //        AddFilesToProject(ViewModel.ApplicationName, dtoFiles);
        //}

        ///// <summary>
        ///// 生成Application
        ///// </summary>
        //private void CreateApplications()
        //{
        //    ThreadHelper.ThrowIfNotOnUIThread();
        //    List<string> applicationFileList = new List<string>();
        //    if (ViewModel.IsApplicationService)
        //    {
        //        if (CreateT4<Service>(ViewModel.ServiceName, 1))
        //            applicationFileList.Add(ViewModel.ServiceFolder + ViewModel.ServiceName);
        //    }
        //    if (ViewModel.IsIApplicationService)
        //    {
        //        if (CreateT4<ServiceInterface>(ViewModel.ServiceInterfaceName, 1))
        //            applicationFileList.Add(ViewModel.ServiceFolder + ViewModel.ServiceInterfaceName);
        //    }
        //    if (applicationFileList.Any())
        //        AddFilesToProject(ViewModel.ApplicationName, applicationFileList);
        //}

        ///// <summary>
        ///// 生成Web
        ///// </summary>
        //private void CreateWebs()
        //{
        //    ThreadHelper.ThrowIfNotOnUIThread();
        //    List<string> webFileList = new List<string>();
        //    if (ViewModel.IsController)
        //    {
        //        if (CreateT4<WebController>(ViewModel.ControllerName, 2))
        //            webFileList.Add(ViewModel.ControllerFolder + ViewModel.ControllerName);
        //    }
        //    if (ViewModel.IsView)
        //    {
        //        if (CreateT4<WebView>(ViewModel.ViewsName, 3))
        //            webFileList.Add(ViewModel.ViewsFolder + ViewModel.ViewsName);
        //    }
        //    if (webFileList.Any())
        //        AddFilesToProject(ViewModel.WebName, webFileList);
        //}

        ///// <summary>
        ///// 运用T4模板生成文件
        ///// </summary>
        ///// <typeparam name="T"></typeparam>
        ///// <param name="fileName"></param>
        ///// <param name="fileType"></param>
        //private bool CreateT4<T>(string fileName, int fileType = 0)
        //    where T : IT4CodeBase, new()
        //{
        //    ThreadHelper.ThrowIfNotOnUIThread();
        //    T t4 = new T { Model = ViewModel };
        //    string pageContent = t4.TransformText();
        //    string path = ViewModel.DtoFolder;
        //    switch (fileType)
        //    {
        //        case 0:
        //            path = ViewModel.DtoFolder;
        //            break;

        //        case 1:
        //            path = ViewModel.ServiceFolder;
        //            break;

        //        case 2:
        //            path = ViewModel.ControllerFolder;
        //            break;

        //        case 3:
        //            path = ViewModel.ViewsFolder;
        //            break;
        //    }
        //    return CreateFile(path, fileName, pageContent);
        //}

        ///// <summary>
        ///// 创建文件
        ///// </summary>
        ///// <param name="sourcePath"></param>
        ///// <param name="fileName"></param>
        ///// <param name="content"></param>
        //private bool CreateFile(string sourcePath, string fileName, string content)
        //{
        //    ThreadHelper.ThrowIfNotOnUIThread();
        //    string path = Path.GetTempPath();
        //    Directory.CreateDirectory(path);
        //    string file = Path.Combine(path, fileName);
        //    File.WriteAllText(file, content, Encoding.UTF8);
        //    try
        //    {
        //        if (string.IsNullOrEmpty(sourcePath))
        //            sourcePath = @"..\..\";
        //        if (!File.Exists(sourcePath))
        //            Directory.CreateDirectory(sourcePath);
        //        string sourceUrl = Path.Combine(sourcePath, fileName);
        //        if (ViewModel.IsReplace)
        //            File.Delete(sourceUrl);
        //        if (!File.Exists(sourceUrl))
        //        {
        //            File.Copy(file, sourceUrl);
        //            Dte.StatusBar.Text = $"VberCode:{fileName}代码已生成。";
        //            return true;
        //        }
        //    }
        //    finally
        //    {
        //        File.Delete(file);
        //    }
        //    return false;
        //}

        ///// <summary>
        ///// 添加文件到项目中
        ///// </summary>
        ///// <param name="projectName"></param>
        ///// <param name="files"></param>
        //public void AddFilesToProject(string projectName, List<string> files)
        //{
        //    ThreadHelper.ThrowIfNotOnUIThread();
        //    try
        //    {
        //        if (Dte != null)
        //        {
        //            foreach (EnvDTE.Project item in Dte.Solution.Projects)
        //            {
        //                if (item.Name == projectName)
        //                {
        //                    foreach (string file in files)
        //                    {
        //                        Dte.StatusBar.Text = $"VberCode：添加文件[{file}]...";
        //                        item.ProjectItems.AddFromFile(file);
        //                    }
        //                    item.Save();
        //                    break;
        //                }

        //                if (item.ProjectItems != null)
        //                {
        //                    foreach (ProjectItem childItem in item.ProjectItems)
        //                    {
        //                        if (childItem.Name == projectName)
        //                        {
        //                            foreach (string file in files)
        //                            {
        //                                Dte.StatusBar.Text = $"VberCode：添加文件[{file}]...";
        //                                childItem.SubProject?.ProjectItems?.AddFromFile(file);
        //                            }
        //                            childItem.SubProject?.Save();
        //                            break;
        //                        }
        //                    }
        //                }
        //            }
        //        }
        //    }
        //    catch
        //    {
        //        //ignored
        //        //Debug.WriteLine(e);
        //    }
        //}

        #endregion 创建文件
    }
}