using System;
using System.Diagnostics;
using System.IO;

namespace Tallier.MapDriveScriptUpdate
{
    public class Fixer
    {
        private Logger log;

        public Fixer(Logger log)
        {
            this.log = log;
        }

        public void Fix()
        {
            try
            {
                this.log.Info("Start process");

                this.log.Info("Resolving startup folder..");
                var folder = Environment.GetFolderPath(Environment.SpecialFolder.Startup);
                this.log.Info("Resolved startup folder: '{0}'", folder);

                if (!Directory.Exists(folder))
                {
                    this.log.Error("Can't fix map script: startup folder doesn't exist");
                    return;
                }

                var files = Directory.GetFiles(folder);
                if (files == null || files.Length == 0)
                {
                    this.log.Error("Can't fix map script: no files found in startup folder");
                    return;
                }

                string scriptPath = string.Empty;
                foreach (var filePath in files)
                {
                    if (string.IsNullOrEmpty(filePath))
                    {
                        continue;
                    }

                    var fi = new FileInfo(filePath);
                    this.log.Info("  Checking '{0}'", fi.Name);

                    if (this.isScript(fi.Name, filePath))
                    {
                        scriptPath = filePath;
                        break;
                    }
                }

                if (string.IsNullOrEmpty(scriptPath))
                {
                    this.log.Info("Can't fix map script: script not found in startup folder or it was already fixed");
                    return;
                }

                this.log.Info("Mapping script found: '{0}'", scriptPath);
                this.log.Info("Fix script content..");
                string content = File.ReadAllText(scriptPath);
                if (string.IsNullOrEmpty(content))
                {
                    this.log.Error("Can't fix map script: script content is empty");
                    return;
                }

                content = content.Replace(@"\\tallier.mobimus.com\", @"\\tallier.mobimus.com@SSL\");
                File.WriteAllText(scriptPath, content);
                this.log.Info("Script is successfully fixed");

                this.log.Info("Run script..");
                var startInfo = new ProcessStartInfo();
                startInfo.CreateNoWindow = false;
                startInfo.UseShellExecute = false;
                startInfo.FileName = scriptPath;
                using (var exeProcess = Process.Start(startInfo))
                {
                    exeProcess.WaitForExit();
                }
                this.log.Info("Script is finished");
            }
            catch (Exception x)
            {
                this.log.Error("Error occured: {0}\n{1}", x.Message, x.StackTrace);
            }
        }

        private bool isScript(string fileName, string filePath)
        {
            if (string.IsNullOrEmpty(fileName))
            {
                return false;
            }
            fileName = fileName.ToLower();
            if (!fileName.Contains("tallier") || !fileName.EndsWith(".cmd"))
            {
                return false;
            }

            string content = File.ReadAllText(filePath);
            if (string.IsNullOrEmpty(content))
            {
                return false;
            }

            return content.ToLower().Contains("tallier.mobimus.com\\davwwwroot");
        }
    }
}