using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Net;
using System.Threading;
using System.Diagnostics;
using SafeMobileLib;
using System.IO;

namespace SharedUI
{
    public partial class UpdateForm : Form
    {
        private AutoUpdate updater;
        private enum CurrentStatus { CHECKING, AVAILABLE, DOWNLOADING, READY_TO_INSTALL, LATEST, FAILED }
        private CurrentStatus currentState = CurrentStatus.CHECKING;

        private App app;
        private Boolean isDevelop;
        public bool IsDevelop
        {
            get { return isDevelop; }
            set { isDevelop = value; }
        }


        [DllImportAttribute("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
        [DllImportAttribute("user32.dll")]
        public static extern bool ReleaseCapture();
        public const int WM_NCLBUTTONDOWN = 0xA1;
        public const int HT_CAPTION = 0x2;

        private bool shouldCheck = false;

        public UpdateForm(App application, bool shouldCheck)
        {
            InitializeComponent();

            /*
            Type type = typeof(PictureBox);
            if(type.Namespace.Equals("MotoRepeater"))
                pictureBox2.Image = global::MotoRepeater.Properties.Resources.software;
            else if (type.Namespace.Equals("AppServer"))
                pictureBox2.Image = global::AppServer.Properties.Resources.software;
            else if (type.Namespace.Equals("MotoTrbo_GW"))
                pictureBox2.Image = global::MotoTrbo_GW.Properties.Resources.software;
                */
            
            var directory = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
            string path = directory + "\\";

            if (Directory.Exists(path + "images"))
            {
                (new DirectoryInfo(path + "images")).Attributes = FileAttributes.Directory | FileAttributes.Hidden;
                pictureBox2.Image = System.Drawing.Image.FromFile(path + "images\\software.png");
                pictureBoxClose.Image = System.Drawing.Image.FromFile(path + "images\\close.png");
            }
            
            this.app = application;

            this.shouldCheck = shouldCheck;
        }
        


        private void pictureBoxClose_Click(object sender, EventArgs e)
        {
            if (currentState == CurrentStatus.DOWNLOADING)
                updater?.CancelUpdate();

            this.Close();
        }


        private void UpdateUIForStatus(CurrentStatus status)
        {
            currentState = status;

            switch (status)
            {
                case CurrentStatus.CHECKING:
                    {
                        labelMainOperation.Text = "Checking updates...";
                        labelCurrentStatus.Text = "Please wait while checking for new " + App.GetAppName(app) + " version.";
                        btCancel.Text = "Close";
                        labelCurrentSize.Text = "";
                        progressBar.Visible = false;
                        progressBar.Value = 0;
                        labelCurrentSize.Visible = false;
                        labelTotalSize.Visible = false;
                        btUpgrade.Visible = false;
                        break;
                    }

                case CurrentStatus.AVAILABLE:
                    {

                        labelMainOperation.Text = "Updates available";
                        labelCurrentStatus.Text = $"Version {updater.GetAvailableVersion()} of {App.GetAppName(app)} available. Update now to get the latest features and improvements";
                        btCancel.Text = "Not now";
                        btUpgrade.Text = "Download";
                        progressBar.Visible = false;
                        labelCurrentSize.Visible = false;
                        labelTotalSize.Visible = false;
                        btUpgrade.Visible = true;
                        break;
                    }

                case CurrentStatus.READY_TO_INSTALL:
                    {
                        labelMainOperation.Text = "Updates are ready to install";
                        labelCurrentStatus.Text = $"The version {updater.GetAvailableVersion()} of {App.GetAppName(app)} is ready to install now. \n\n "
                            + "It won't take long to upgrade - and you'll get all the latest improvements and fixes.";
                        btCancel.Text = "Not now";
                        btUpgrade.Text = "Upgrade";
                        progressBar.Visible = false;
                        labelCurrentSize.Visible = false;
                        labelTotalSize.Visible = false;
                        btUpgrade.Visible = true;
                        break;
                    }

                case CurrentStatus.DOWNLOADING:
                    {
                        labelMainOperation.Text = "Downloading updates...";
                        labelCurrentStatus.Text = $"Please wait while the {App.GetAppName(app)} update is being downloaded.";
                        btCancel.Text = "Cancel";
                        progressBar.Visible = true;
                        labelCurrentSize.Visible = true;
                        labelTotalSize.Visible = true;
                        btUpgrade.Visible = false;
                        break;
                    }

                case CurrentStatus.LATEST:
                    {
                        labelMainOperation.Text = "Up to date";
                        labelCurrentStatus.Text = "You have the latest version of " + App.GetAppName(app) + " installed.";

                        btCancel.Text = "Close";
                        labelCurrentSize.Text = "";
                        progressBar.Visible = false;
                        progressBar.Value = 0;
                        labelCurrentSize.Visible = false;
                        labelTotalSize.Visible = false;
                        btUpgrade.Visible = false;
                        break;
                    }

                case CurrentStatus.FAILED:
                    {
                        labelMainOperation.Text = "Download failed";
                        labelCurrentStatus.Text = "Failed to download the update for " + App.GetAppName(app) + " . Please try again or contact support. ";
                        btUpgrade.Text = "Retry";
                        btCancel.Text = "Close";
                        labelCurrentSize.Text = "";
                        progressBar.Visible = false;
                        progressBar.Value = 0;
                        labelCurrentSize.Visible = false;
                        labelTotalSize.Visible = false;
                        btUpgrade.Visible = true;
                        break;
                    }
            }

        }


        /// <summary>
        /// Intercept mouse move on all the items of the form
        /// </summary>
        /// <param name="sender">UI object which raised the event</param>
        /// <param name="e">Mouse event parameters</param>
        private void SettingsForm_MouseMove(object sender, MouseEventArgs e)
        {
            // move form window if mouse moved with mouse pressed
            if (e.Button == MouseButtons.Left)
            {
                ReleaseCapture();
                SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
            }
        }

        
        /// <summary>
        /// Event handler for when the from is loaded. It will update the UI 
        /// elements to the value stored in the config file
        /// </summary>
        private void SettingsForm_Load(object sender, EventArgs e)
        {
            updater = new AutoUpdate(app) { IsDevelop = isDevelop };
           
            updater.OnNewVersionAvailable += delegate (String version)
            {
                if(updater.UpdateDownloaded)
                {
                    if (InvokeRequired)
                        this.Invoke((MethodInvoker)delegate ()
                        {
                            UpdateUIForStatus(CurrentStatus.READY_TO_INSTALL);
                        });
                    else
                        UpdateUIForStatus(CurrentStatus.READY_TO_INSTALL);
                }
                else
                    if (InvokeRequired)
                    this.Invoke((MethodInvoker)delegate ()
                    {
                        UpdateUIForStatus(CurrentStatus.AVAILABLE);
                    });
                else
                    UpdateUIForStatus(CurrentStatus.AVAILABLE);
            };
            updater.OnLatestVersionAvailable += delegate ()
            {
                if (InvokeRequired)
                    this.Invoke((MethodInvoker)delegate ()
                    {
                        UpdateUIForStatus(CurrentStatus.LATEST);
                    });
                else
                    UpdateUIForStatus(CurrentStatus.LATEST);

            };

            // register for progress changed 
            updater.OnProgressChanged += delegate (DownloadProgressChangedEventArgs ee)
            {
                string totalBytes = (ee.TotalBytesToReceive / 1024d).ToString("0.00");
                string bytesReceived = (ee.BytesReceived / 1024d).ToString("0.00");

                if (InvokeRequired)
                {
                    this.Invoke((MethodInvoker)delegate ()
                    {
                    // Update the label with how much data have been downloaded so far and the total size of the file we are currently downloading
                    labelCurrentSize.Text = "downloaded  " + ee.ProgressPercentage + "%  (" + bytesReceived + " KB)";
                        labelTotalSize.Text = "File size " + totalBytes + " KB";

                    /*
                    labelDownloaded.Text = string.Format("{0} MB's / {1} MB's",
                        (e.BytesReceived / 1024d / 1024d).ToString("0.00"),
                        (e.TotalBytesToReceive / 1024d / 1024d).ToString("0.00"));*/

                    // Update the progressbar percentage only when the value is not the same.
                    progressBar.Value = ee.ProgressPercentage;
                    });
                }
                else
                {
                    // Update the label with how much data have been downloaded so far and the total size of the file we are currently downloading
                    labelCurrentSize.Text = "downloaded  " + ee.ProgressPercentage + "%  (" + bytesReceived + " KB)";
                    labelTotalSize.Text = "File size " + totalBytes + " KB";

                    /*
                    labelDownloaded.Text = string.Format("{0} MB's / {1} MB's",
                        (e.BytesReceived / 1024d / 1024d).ToString("0.00"),
                        (e.TotalBytesToReceive / 1024d / 1024d).ToString("0.00"));*/

                    // Update the progressbar percentage only when the value is not the same.
                    progressBar.Value = ee.ProgressPercentage;
                }
            };

            updater.OnDownloadCompleted += delegate (string filePath)
            {
                if (InvokeRequired)
                    this.Invoke((MethodInvoker)delegate ()
                    {
                        UpdateUIForStatus(CurrentStatus.READY_TO_INSTALL);
                    });
                else
                    UpdateUIForStatus(CurrentStatus.READY_TO_INSTALL);

            };

            // failed to download the update
            updater.OnDownloadFailed += delegate (Exception ex)
            {
                if (InvokeRequired)
                    this.Invoke((MethodInvoker)delegate ()
                    {
                        UpdateUIForStatus(CurrentStatus.FAILED);
                    });
                else
                    UpdateUIForStatus(CurrentStatus.FAILED);

            };

            if (shouldCheck)
            {
                if (InvokeRequired)
                    this.Invoke((MethodInvoker)delegate ()
                    {
                        UpdateUIForStatus(CurrentStatus.CHECKING);
                    });
                else
                    UpdateUIForStatus(CurrentStatus.CHECKING);

                updater.CheckUpdate();
            }
            else
            {
                if (InvokeRequired)
                    this.Invoke((MethodInvoker)delegate ()
                    {
                        UpdateUIForStatus(CurrentStatus.AVAILABLE);
                    });
                else
                    UpdateUIForStatus(CurrentStatus.AVAILABLE);

            }

        }

        private void btCancel_Click(object sender, EventArgs e)
        {
            if (currentState == CurrentStatus.DOWNLOADING)
                updater?.CancelUpdate();

            this.Close();
        }

        private void btUpgrade_Click(object sender, EventArgs e)
        {
            if (currentState == CurrentStatus.AVAILABLE || currentState == CurrentStatus.FAILED)
            {
                if (InvokeRequired)
                    this.Invoke((MethodInvoker)delegate ()
                    {
                        UpdateUIForStatus(CurrentStatus.DOWNLOADING);
                    });
                else
                    UpdateUIForStatus(CurrentStatus.DOWNLOADING);


                updater.Download();
            }
            else if(currentState == CurrentStatus.READY_TO_INSTALL)
            {
                //MotoTrbo_GW.Program.isRunning = false;

                // close current process
                Thread th = new Thread(new ThreadStart(delegate ()
                {
                    Process p = new Process();
                    ProcessStartInfo info = new ProcessStartInfo();
                    info.CreateNoWindow = true;
                    info.FileName = "cmd.exe";
                    info.RedirectStandardInput = true;
                    info.RedirectStandardOutput = true;
                    info.UseShellExecute = false;

                    p.StartInfo = info;
                    p.Start();

                    StreamWriter sw = p.StandardInput;

                    if (sw.BaseStream.CanWrite)
                    {
                        //get the full location of the assembly with DaoTests in it
                        string fullPath = System.Reflection.Assembly.GetAssembly(typeof(UpdateForm)).Location;

                        //get the folder that's in
                        string theDirectory = Path.GetDirectoryName(fullPath);

                        String msiCmd = "msiexec /i " + '"' + updater.DownloadedFilePath + '"' + " TARGETDIR=" + '"' + theDirectory + '"';
                        sw.WriteLine(msiCmd);

                    }
                    sw.Close();
                    p.WaitForExit();
                    
                    // start the msi file
                    //Process.Start(updater.DownloadedFilePath);
                    //Process.Start(System.Reflection.Assembly.GetExecutingAssembly().Location, Program.isConsoleEnabled ? " -c" : "");

                    Process oldProcess = Process.GetCurrentProcess();
                    oldProcess.Kill();
                    Application.Exit();

                    Thread.Sleep(300);

                }));
                th.Start();
            }
        }

    }
}