/*  Encode.cs $
 	
 	   This file is part of the HandBrake source code.
 	   Homepage: <http://handbrake.fr>.
 	   It may be used under the terms of the GNU General Public License. */

using System;
using System.Diagnostics;
using System.Windows.Forms;
using System.IO;
using Handbrake.Functions;

namespace Handbrake.EncodeQueue
{
    public class Encode
    {
        /// <summary>
        /// Execute a HandBrakeCLI process.
        /// </summary>
        /// <param name="query">The CLI Query</param>
        public EncodeProcess runCli(string query)
        {
            EncodeProcess currentEncode = new EncodeProcess();
            try
            {
                string handbrakeCLIPath = Path.Combine(Application.StartupPath, "HandBrakeCLI.exe");
                string logDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\HandBrake\\logs";
                string logPath = Path.Combine(logDir, "last_encode_log.txt");
                string strCmdLine = String.Format(@" CMD /c """"{0}"" {1} 2>""{2}"" """, handbrakeCLIPath, query, logPath);

                ProcessStartInfo cliStart = new ProcessStartInfo("CMD.exe", strCmdLine);
                if (Properties.Settings.Default.enocdeStatusInGui == "Checked")
                {
                    cliStart.RedirectStandardOutput = true;
                    cliStart.UseShellExecute = false;

                }
                if (Properties.Settings.Default.cli_minimized == "Checked")
                    cliStart.WindowStyle = ProcessWindowStyle.Minimized;

                Process[] before = Process.GetProcesses(); // Get a list of running processes before starting.
                currentEncode.hbProcProcess = Process.Start(cliStart);
                currentEncode.processID = Main.getCliProcess(before);
                currentEncode.isEncoding = true;
                currentEncode.currentQuery = query;
                if (currentEncode.hbProcProcess != null)
                    currentEncode.processHandle = (int)currentEncode.hbProcProcess.MainWindowHandle; // Set the process Handle

                // Set the process Priority
                Process hbCliProcess = null;
                if (currentEncode.processID != -1)
                    hbCliProcess = Process.GetProcessById(currentEncode.processID);

                if (hbCliProcess != null)
                    switch (Properties.Settings.Default.processPriority)
                    {
                        case "Realtime":
                            hbCliProcess.PriorityClass = ProcessPriorityClass.RealTime;
                            break;
                        case "High":
                            hbCliProcess.PriorityClass = ProcessPriorityClass.High;
                            break;
                        case "Above Normal":
                            hbCliProcess.PriorityClass = ProcessPriorityClass.AboveNormal;
                            break;
                        case "Normal":
                            hbCliProcess.PriorityClass = ProcessPriorityClass.Normal;
                            break;
                        case "Low":
                            hbCliProcess.PriorityClass = ProcessPriorityClass.Idle;
                            break;
                        default:
                            hbCliProcess.PriorityClass = ProcessPriorityClass.BelowNormal;
                            break;
                    }
            }
            catch (Exception exc)
            {
                MessageBox.Show("It would appear that HandBrakeCLI has not started correctly. You should take a look at the Activity log as it may indicate the reason why.\n\n   Detailed Error Information: error occured in runCli()\n\n" + exc, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

            return currentEncode;
        }

        /// <summary>
        /// Kill the CLI process
        /// </summary>
        public void closeCLI(EncodeProcess ep)
        {
            Process cli = Process.GetProcessById(ep.processID);
            if (!cli.HasExited)
                cli.Kill();
        }

        /// <summary>
        /// Perform an action after an encode. e.g a shutdown, standby, restart etc.
        /// </summary>
        public void afterEncodeAction(EncodeProcess ep)
        {
            ep.isEncoding = false;
            ep.currentQuery = String.Empty;
            // Do something whent he encode ends.
            switch (Properties.Settings.Default.CompletionOption)
            {
                case "Shutdown":
                    Process.Start("Shutdown", "-s -t 60");
                    break;
                case "Log Off":
                    Win32.ExitWindowsEx(0, 0);
                    break;
                case "Suspend":
                    Application.SetSuspendState(PowerState.Suspend, true, true);
                    break;
                case "Hibernate":
                    Application.SetSuspendState(PowerState.Hibernate, true, true);
                    break;
                case "Lock System":
                    Win32.LockWorkStation();
                    break;
                case "Quit HandBrake":
                    Application.Exit();
                    break;
                default:
                    break;
            }
        }

        /// <summary>
        /// Append the CLI query to the start of the log file.
        /// </summary>
        /// <param name="query"></param>
        public void addCLIQueryToLog(string query)
        {
            string logDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\HandBrake\\logs";
            string logPath = Path.Combine(logDir, "last_encode_log.txt");

            StreamReader reader = new StreamReader(File.Open(logPath, FileMode.Open, FileAccess.Read));
            String log = reader.ReadToEnd();
            reader.Close();

            StreamWriter writer = new StreamWriter(File.Create(logPath));

            writer.Write("### CLI Query: " + query + "\n\n");
            writer.Write("#########################################\n\n");
            writer.WriteLine(log);
            writer.Flush();
            writer.Close();
        }

        /// <summary>
        /// Save a copy of the log to the users desired location or a default location
        /// if this feature is enabled in options.
        /// </summary>
        /// <param name="destination"></param>
        public void copyLog(string destination)
        {
            try
            {
                string logDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\HandBrake\\logs";
                string tempLogFile = Path.Combine(logDir, "last_encode_log.txt");

                string encodeDestinationPath = Path.GetDirectoryName(destination);
                String[] destName = destination.Split('\\');
                string destinationFile = destName[destName.Length - 1];
                string encodeLogFile = DateTime.Now.ToString().Replace("/", "-").Replace(":", "-") + " " + destinationFile + ".txt";

                // Make sure the log directory exists.
                if (!Directory.Exists(logDir))
                    Directory.CreateDirectory(logDir);

                // Copy the Log to HandBrakes log folder in the users applciation data folder.
                File.Copy(tempLogFile, Path.Combine(logDir, encodeLogFile));

                // Save a copy of the log file in the same location as the enocde.
                if (Properties.Settings.Default.saveLogWithVideo == "Checked")
                    File.Copy(tempLogFile, Path.Combine(encodeDestinationPath, encodeLogFile));

                // Save a copy of the log file to a user specified location
                if (Directory.Exists(Properties.Settings.Default.saveLogPath))
                    if (Properties.Settings.Default.saveLogPath != String.Empty && Properties.Settings.Default.saveLogToSpecifiedPath == "Checked")
                        File.Copy(tempLogFile, Path.Combine(Properties.Settings.Default.saveLogPath, encodeLogFile));
            }
            catch (Exception exc)
            {
                MessageBox.Show("Something went a bit wrong trying to copy your log file.\nError Information:\n\n" + exc, "Error",
                                MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

    }
}