using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using JustDance.Tools;
using Sharpmake;
using Ubisoft.Perforce;

namespace sharpmake_sharpmake.Tools.Helpers
{
    internal class AssemblyInfoGenerator
    {
        private static readonly int _changelist;
        private static readonly string _clientName;
        private readonly string _assemblyFilePath;
        private readonly string _description = "";

        static AssemblyInfoGenerator()
        {
            TryGetPerforceInformation(BaseProject.ToolsPath, out _changelist, out _clientName);
        }

        public AssemblyInfoGenerator(Project project)
        {
            _assemblyFilePath = project.ResolveString(BaseProject.BuildPath + @"\tools\[project.Name]\Properties\" + "AssemblyInfo.cs");
            if (!Directory.Exists(Path.GetDirectoryName(_assemblyFilePath)))
            {
                Directory.CreateDirectory(Path.GetDirectoryName(_assemblyFilePath));
            }

            project.SourceFiles.Add(_assemblyFilePath);

            var descriptionAttribute = project.GetType().GetCustomAttributes(typeof(DescriptionAttribute), true).Cast<DescriptionAttribute>().FirstOrDefault();
            if (descriptionAttribute != null)
            {
                _description = descriptionAttribute.Description;
            }
        }

        public void AfterConfigureAll(Project.Configuration conf)
        {
            var version = string.Format("{0}.{1}.{2}.{3}", DateTime.Today.Year, DateTime.Today.Month, _changelist / 10000, _changelist % 10000);

            var usings = new List<string>();
            usings.Add("System.Reflection");
            usings.Add("System.Runtime.InteropServices");

            var attributes = new List<AssemblyAttribute>();

            attributes.Add(new AssemblyAttribute("AssemblyTitle", conf.Project.Name));
            attributes.Add(new AssemblyAttribute("AssemblyDescription", _description));
            attributes.Add(new AssemblyAttribute("AssemblyConfiguration", ""));
            attributes.Add(new AssemblyAttribute("AssemblyCompany", "Ubisoft"));
            attributes.Add(new AssemblyAttribute("AssemblyProduct", conf.Project.Name));
            attributes.Add(new AssemblyAttribute("AssemblyCopyright", "Copyright (C) Ubisoft. All rights reserved."));
            attributes.Add(new AssemblyAttribute("AssemblyTrademark", ""));
            attributes.Add(new AssemblyAttribute("AssemblyCulture", ""));
            attributes.Add(new AssemblyAttribute("AssemblyVersion", version));
            attributes.Add(new AssemblyAttribute("AssemblyFileVersion", version));
            attributes.Add(new AssemblyAttribute("AssemblyInformationalVersion", _changelist.ToString()));
            attributes.Add(new AssemblyAttribute("AssemblyMetadata", "BuildPerforceChangelist", _changelist.ToString()));
            attributes.Add(new AssemblyAttribute("AssemblyMetadata", "BuildPerforceClientName", _clientName));
            attributes.Add(new AssemblyAttribute("AssemblyMetadata", "BuildUserName", Environment.UserName));
            attributes.Add(new AssemblyAttribute("AssemblyMetadata", "BuildMachineName", Environment.MachineName));
            attributes.Add(new AssemblyAttribute("AssemblyMetadata", "BuildCreationTime", DateTime.UtcNow.ToString("s", System.Globalization.CultureInfo.InvariantCulture)));

            if (conf.ReferencesByName.Contains("PresentationFramework"))
            {
                attributes.Add(new AssemblyAttribute("ThemeInfo", false, "ResourceDictionaryLocation.None", "ResourceDictionaryLocation.SourceAssembly"));
                usings.Add("System.Windows");
            }

            var content = string.Format(Template, 
                string.Join("\n", usings.Select(x => "using " + x + ";")),
                string.Join("\n", attributes.Select(x => "[assembly: " + x.ToString() + "]")));
            File.WriteAllText(_assemblyFilePath, content);
        }

        private const string Template =
            @"{0}

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

{1}
";

        private static void TryGetPerforceInformation(string path, out int changelist, out string clientName)
        {
            changelist = 0;
            clientName = "";
            try
            {
                GetPerforceInformation(path, out changelist, out clientName);
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }
        }

        private static void GetPerforceInformation(string path, out int changelist, out string clientName)
        {
            changelist = 0;
            clientName = "";
            var codePerforce = "p4-jd-code-mrc.ubisoft.org:1920";
            var perforce = new PerforceWrapper("", Environment.UserName, "", codePerforce, true);
            var client = perforce.GetClients(Environment.UserName, Environment.MachineName).FirstOrDefault(x => Path.GetFullPath(path).ToLower().StartsWith(Path.GetFullPath(x.Root).ToLower()));
            if (client != null)
            {
                clientName = client.ClientName;
            }
            else
            {
                return;
            }

            var result = perforce.Run("changes", "-m1", "@" + clientName);
            if (result.Records.Length == 0)
                return;
            if (result.Records[0].Fields.ContainsKey("change"))
            {
                int.TryParse(result.Records[0].Fields["change"], out changelist);
            }
        }

        private class AssemblyAttribute
        {
            public AssemblyAttribute(string name, params string[] parameters)
            {
                Name = name;
                Parameters = parameters;
                QuoteArguments = true;
            }

            public AssemblyAttribute(string name, bool quoteArguments, params string[] parameters)
            {
                Name = name;
                Parameters = parameters;
                QuoteArguments = quoteArguments;
            }

            public string Name { get; set; }

            public string[] Parameters { get; set; }

            public bool QuoteArguments { get; set; }

            /// <inheritdoc />
            public override string ToString()
            {
                var parameters = QuoteArguments ? Parameters.Select(x => "\"" + x.ToString() + "\"") : Parameters.Select(x => x.ToString());
                return Name + "(" + string.Join(", ", parameters) + ")";
            }
        }

    }
}