using System;
using System.Diagnostics;
using LJLib.Cmd;
using System.IO;
using System.Text.RegularExpressions;
using System.Windows.Forms;

namespace NetGitTool
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args == null || args.Length < 2)
            {
                return;
            }
            var op = args[0].Trim();
            var projectPath = args[1].Trim();
            var config = args.Length >= 3 ? args[2] : string.Empty;
            try
            {
                if (projectPath.StartsWith("\""))
                {
                    projectPath = projectPath.Substring(1, projectPath.Length - 1);
                }
                if (projectPath.EndsWith("\""))
                {
                    projectPath = projectPath.Substring(0, projectPath.Length - 1);
                }
                else
                {
                    var lastindex = projectPath.LastIndexOf("\"");
                    if (lastindex > 0)
                    {
                        config = projectPath.Substring(lastindex + 1).Trim().ToUpper();
                        projectPath = projectPath.Substring(0, lastindex);
                    }
                    else if (!Directory.Exists(projectPath))
                    {
                        lastindex = projectPath.LastIndexOf(" ");
                        if (lastindex > 0)
                        {
                            config = projectPath.Substring(lastindex + 1).Trim().ToUpper();
                            projectPath = projectPath.Substring(0, lastindex);
                        }
                    }
                }
                if (projectPath.EndsWith("\\"))
                {
                    projectPath = projectPath.Substring(0, projectPath.Length - 1);
                }

                if (!Directory.Exists(projectPath))
                {
                    return;
                }

                if (op == "/before")
                {
                    var versionName = string.Empty;
                    var gitlog = CMDHelper.RunWithReturn("git log -1 --format=%D", projectPath);
                    if (gitlog.Contains("tag"))
                    {
                        var dscrpArr = gitlog.Split(',');
                        foreach(var item in dscrpArr)
                        {
                            var dscrpItem = item.Trim();
                            if(dscrpItem.StartsWith("tag: V"))
                            {
                                versionName = dscrpItem.Substring(5);
                                break;
                            }
                        }
                    }
                    if (string.IsNullOrEmpty(versionName))
                    {
                        versionName = CMDHelper.RunWithReturn("git describe --tags --dirty", projectPath);
                    }
                    else
                    {
                        var dirtyDscrp = CMDHelper.RunWithReturn("git describe --dirty", projectPath);
                        if (dirtyDscrp.EndsWith("-dirty"))
                        {
                            versionName += "-dirty";
                        }
                    }
                    if (!versionName.StartsWith("V"))
                    {
                        return;
                    }

                    if (!string.IsNullOrEmpty(config) && config != "RELEASE")
                    {
                        versionName += config;
                    }

                    var file = projectPath + "\\Properties\\AssemblyInfo.cs";
                    if (!File.Exists(file))
                    {
                        return;
                    }
                    string content;
                    using (var reader = File.OpenText(file))
                    {
                        content = reader.ReadToEnd();
                    }
                    var bakfile = file + ".bak";
                    if (File.Exists(bakfile))
                    {
                        File.Delete(bakfile);
                    }
                    File.Move(file, bakfile);
                    Regex regex = new Regex("AssemblyFileVersion\\(\".*\"\\)");
                    content = regex.Replace(content, string.Format("AssemblyFileVersion(\"{0}\")", versionName));
                    using (var writer = File.CreateText(file))
                    {
                        writer.Write(content);
                    }
                }
                else if (op == "/after")
                {
                    var file = projectPath + "\\Properties\\AssemblyInfo.cs";
                    var bakfile = file + ".bak";
                    if (!File.Exists(bakfile))
                    {
                        return;
                    }
                    if (File.Exists(file))
                    {
                        File.Delete(file);
                    }
                    File.Move(bakfile, file);
                }
            }
            catch (Exception ex)
            {
                Trace.Write(string.Format("{0} {1}\r\n{2}", args[0].Trim(), args[1].Trim(), ex.ToString()));
            }
        }
    }
}