using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Protobuf.Compilers;

namespace Tango.Protobuf.CLI
{
    class Program
    {
        static int Main(string[] args)
        {
            try
            {
                Console.Title = "Tango Protobuf Compiler";

#if DEBUG

                if (args.Length == 0)
                {
                    args = new string[]
                    {
                        "-i " + Path.GetFullPath("..\\..\\..\\..\\PMR\\Messages"),
                        "-o " + Path.GetFullPath("..\\..\\..\\Tango.PMR"),
                        "-l CSharp",
                    };
                }

#endif

                if (args.Length == 0)
                {
                    return ExitHelp();
                }

                var options = new Options();

                if (CommandLine.Parser.Default.ParseArguments(args, options))
                {
                    options.SourceFolder = options.SourceFolder.Trim();
                    options.OutputFolder = options.OutputFolder.Trim();
                    options.Language = options.Language.Trim();

                    if (!Directory.Exists(options.SourceFolder))
                    {
                        return ExitError("Could not locate source folder \"" + Path.GetFullPath(options.SourceFolder) + "\"");
                    }
                    if (!Directory.Exists(options.OutputFolder))
                    {
                        return ExitError("Could not locate output folder " + Path.GetFullPath(options.OutputFolder));
                    }

                    CompilerLanguage language;
                    if (!Enum.TryParse<CompilerLanguage>(options.Language, out language))
                    {
                        return ExitError("Invalid language: " + options.Language);
                    }

                    try
                    {
                        var compiler = CompilerFactory.CreateCompiler(language);

                        if (options.Min && compiler is CCompiler)
                        {
                            (compiler as CCompiler).Minimize = true;
                        }


                        compiler.CompilationProgress += (x, e) =>
                        {
                            try
                            {
                                Console.SetCursorPosition(0, 0);
                                Console.Write(new string(' ', Console.WindowWidth));
                                Console.SetCursorPosition(0, 0);
                                Console.Write("Compiling " + Path.GetFileName(e.File) + "...");
                                Console.SetCursorPosition(Console.WindowWidth - 7, 0);
                                Console.Write("(% " + Math.Round((((double)e.Current / (double)e.Total) * 100d), 0) + ")");
                            }
                            catch { }
                        };

                        var result = compiler.CompileFolder(Path.GetFullPath(options.SourceFolder), options.Includes != null ? options.Includes.Split(',') : null);
                        result.Save(Path.GetFullPath(options.OutputFolder));
                    }
                    catch (Exception ex)
                    {
                        return ExitError(ex.ToString());
                    }

                    return ExitSuccess("Protobuf folder compiled to " + Path.GetFullPath(options.OutputFolder));
                }
                else
                {
                    throw new ArgumentException("Error parsing input arguments.");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                return -1;
            }
        }

        private static int ExitSuccess(String text)
        {
            Console.WriteLine(text);
            return 0;
        }

        private static int ExitError(String error)
        {
            Console.WriteLine(error);

            if (Debugger.IsAttached)
            {
                Console.ReadLine();
            }

            return -1;
        }

        private static int ExitHelp()
        {
            Console.WriteLine(
@"
    Example: proto-tc -i <source folder> -o <output folder> -l <language>

    Available -l arguments:
    
        CSharp
        Java
        JavaNano
        CPP
        C
        EmbeddedC
        JS
        Python
        PHP
        Ruby
");

            return -1;
        }
    }
}