using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace InstallShieldBranch
{
    public partial class BrancherForm : Form
    {
        private readonly BackgroundWorker _worker;
        public BrancherForm()
        {
            InitializeComponent();

            _worker = new BackgroundWorker { WorkerReportsProgress = true, WorkerSupportsCancellation = true };
            _worker.DoWork += worker_DoWork;
        }

        void worker_DoWork(object sender, DoWorkEventArgs e)
        {
            var searchAndReplace = new List<Tuple<byte[], byte[]>>()
            {
                //Tuple.Create(
                //    BitConverter.GetBytes((UInt32)0x5f544E49),  //_TNI
                //    BitConverter.GetBytes((UInt32)0x5f544E49)), //_TNI
                //Tuple.Create(
                //    BitConverter.GetBytes((UInt32)0x31305f32),  //10_2
                //    BitConverter.GetBytes((UInt32)0x32305f32)), //20_2
                Tuple.Create(
                    BitConverter.GetBytes((UInt32)0x5f564544),  //_VED
                    BitConverter.GetBytes((UInt32)0x5f564544)), //_VED
                Tuple.Create(
                    BitConverter.GetBytes((UInt32)0x35305f32),  //50_2
                    BitConverter.GetBytes((UInt32)0x30305f33)), //00_3
            };

            using (var reader = new BinaryReader(new FileStream(@"C:\Projects\TestSetups\Installer_DataPRO_x64_DEV_2_05.ise", FileMode.Open)))
            {
                using (var writer = new BinaryWriter(new FileStream(@"C:\Projects\TestSetups\Installer_DataPRO_x64_DEV_3_00 - New.ise", FileMode.Create)))
                {
                    BinaryUtility.Replace(reader, writer, searchAndReplace);
                }
            }

            MessageBox.Show("Done");
        }

        public static class BinaryUtility
        {
            public static IEnumerable<byte> GetByteStream(BinaryReader reader)
            {
                const int bufferSize = 1024;
                byte[] buffer;
                do
                {
                    buffer = reader.ReadBytes(bufferSize);
                    foreach (var d in buffer) { yield return d; }
                } while (bufferSize == buffer.Length);
            }

            public static void Replace(BinaryReader reader, BinaryWriter writer, IEnumerable<Tuple<byte[], byte[]>> searchAndReplace)
            {
                foreach (byte d in Replace(GetByteStream(reader), searchAndReplace)) { writer.Write(d); }
            }

            public static IEnumerable<byte> Replace(IEnumerable<byte> source, IEnumerable<Tuple<byte[], byte[]>> searchAndReplace)
            {
                foreach (var s in searchAndReplace)
                {
                    source = Replace(source, s.Item1, s.Item2);
                }
                return source;
            }

            public static IEnumerable<byte> Replace(IEnumerable<byte> input, IEnumerable<byte> from, IEnumerable<byte> to)
            {
                var fromEnumerator = from.GetEnumerator();
                fromEnumerator.MoveNext();
                int match = 0;
                foreach (var data in input)
                {
                    if (data == fromEnumerator.Current)
                    {
                        match++;
                        if (fromEnumerator.MoveNext()) { continue; }
                        foreach (byte d in to) { yield return d; }
                        match = 0;
                        fromEnumerator.Reset();
                        fromEnumerator.MoveNext();
                        continue;
                    }
                    if (0 != match)
                    {
                        foreach (byte d in from.Take(match)) { yield return d; }
                        match = 0;
                        fromEnumerator.Reset();
                        fromEnumerator.MoveNext();
                    }
                    yield return data;
                }
                if (0 != match)
                {
                    foreach (byte d in from.Take(match)) { yield return d; }
                }
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            _worker.RunWorkerAsync();
        }
    }
}