using System;
using System.IO;
using System.Windows.Forms;

using SharpCompress.Archive;
using SharpCompress.Common;

namespace Custom_Installer
{
    class Extract
    {
        public String FilePath { get; set; }
        public String ExtractPath { get; set; }
        public ProgressBar Progress { get; set; }
        public Label Information { get; set; }
        public Boolean IsFinished;

        public void StartExtract()
        {
            try
            {
                using (var CurrentArchive = ArchiveFactory.Open(FilePath))
                {
                    Int32 Completed = 0;
                    Int32 Total = 0;

                    foreach (var CurrentEntry in CurrentArchive.Entries) { if (!CurrentEntry.IsDirectory) { Total++; } }

                    foreach (var CurrentEntry in CurrentArchive.Entries)
                    {
                        Double CompletedDouble = (Double)Completed;
                        Double TotalDouble = (Double)Total;
                        Double ProgressDouble = (CompletedDouble / TotalDouble);
                        Int32 ProgressPercentage = (Int32)(ProgressDouble * 100);

                        if (!CurrentEntry.IsDirectory)
                        {
                            if (Progress != null) { Progress.BeginInvoke((Action)(() => { Progress.Value = ProgressPercentage; })); }
                            if (Information != null) { Information.BeginInvoke((Action)(() => { Information.Text = String.Format("Extracting: ({0}%) [{1}/{2}]", ProgressPercentage, Completed, Total); })); }

                            CurrentEntry.WriteToDirectory(ExtractPath, ExtractOptions.ExtractFullPath | ExtractOptions.Overwrite);
                        }
                        else { Directory.CreateDirectory(CurrentEntry.FilePath); }

                        Completed++;
                    }
                }

                if (Progress != null) { Progress.BeginInvoke((Action)(() => { Progress.Value = 100; })); }
                if (Information != null) { Information.BeginInvoke((Action)(() => { Information.Text = String.Format("Extracted Successfully"); })); }

                IsFinished = true;
            }
            catch(Exception Error)
            {
                Program.Message(Error.Message);
                Program.Shutdown();
            }
        }
    }
}