// --------------------------------------------------------------------------------------------------------------------
// <copyright file="WhenDoneService.cs" company="HandBrake Project (http://handbrake.fr)">
//   This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
//   Defines the WhenDoneService type.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

namespace HandBrakeWPF.Services
{
    using System.Diagnostics;
    using System.Windows.Forms;

    using Caliburn.Micro;

    using HandBrake.ApplicationServices.Services.Interfaces;
    using HandBrake.ApplicationServices.Utilities;

    using HandBrakeWPF.Services.Interfaces;

    using Application = System.Windows.Application;

    /// <summary>
    /// The when done service.
    /// </summary>
    public class PrePostActionService : IPrePostActionService
    {
        /// <summary>
        /// The queue processor.
        /// </summary>
        private readonly IQueueProcessor queueProcessor;

        /// <summary>
        /// The user setting service.
        /// </summary>
        private readonly IUserSettingService userSettingService;

        /// <summary>
        /// Initializes a new instance of the <see cref="PrePostActionService"/> class.
        /// </summary>
        /// <param name="queueProcessor">
        /// The queue processor.
        /// </param>
        /// <param name="userSettingService">
        /// The user Setting Service.
        /// </param>
        public PrePostActionService(IQueueProcessor queueProcessor, IUserSettingService userSettingService)
        {
            this.queueProcessor = queueProcessor;
            this.userSettingService = userSettingService;

            this.queueProcessor.QueueCompleted += QueueProcessorQueueCompleted;
            this.queueProcessor.EncodeService.EncodeCompleted += EncodeService_EncodeCompleted;
            this.queueProcessor.EncodeService.EncodeStarted += EncodeService_EncodeStarted;
        }

        /// <summary>
        /// The encode service_ encode started.
        /// </summary>
        /// <param name="sender">
        /// The sender.
        /// </param>
        /// <param name="e">
        /// The e.
        /// </param>
        private void EncodeService_EncodeStarted(object sender, System.EventArgs e)
        {
            if (this.userSettingService.GetUserSetting<bool>(UserSettingConstants.PreventSleep))
            {
                Win32.PreventSleep();
            }
        }

        /// <summary>
        /// The encode service_ encode completed.
        /// </summary>
        /// <param name="sender">
        /// The sender.
        /// </param>
        /// <param name="e">
        /// The EncodeCompletedEventArgs.
        /// </param>
        private void EncodeService_EncodeCompleted(object sender, HandBrake.ApplicationServices.EventArgs.EncodeCompletedEventArgs e)
        {
            // Send the file to the users requested applicaiton
            if (e.Successful)
            {
                this.SendToApplication(e.FileName);
            }

            // Allow the system to sleep again.
            Execute.OnUIThread(() =>
            {
                if (this.userSettingService.GetUserSetting<bool>(UserSettingConstants.PreventSleep))
                {
                    Win32.AllowSleep();
                }
            });
        }

        /// <summary>
        /// The queue processor queue completed event handler.
        /// </summary>
        /// <param name="sender">
        /// The sender.
        /// </param>
        /// <param name="e">
        /// The e.
        /// </param>
        private void QueueProcessorQueueCompleted(object sender, System.EventArgs e)
        {
            // Do something whent he encode ends.
            switch (this.userSettingService.GetUserSetting<string>(UserSettingConstants.WhenCompleteAction))
            {
                case "Shutdown":
                    Process.Start("Shutdown", "-s -t 60");
                    break;
                case "Log off":
                    Win32.ExitWindowsEx(0, 0);
                    break;
                case "Suspend":
                    System.Windows.Forms.Application.SetSuspendState(PowerState.Suspend, true, true);
                    break;
                case "Hibernate":
                    System.Windows.Forms.Application.SetSuspendState(PowerState.Hibernate, true, true);
                    break;
                case "Lock System":
                    Win32.LockWorkStation();
                    break;
                case "Quit HandBrake":
                    Execute.OnUIThread(() => Application.Current.Shutdown());
                    break;
            }
        }

        /// <summary>
        /// Send a file to a 3rd party application after encoding has completed.
        /// </summary>
        /// <param name="file">
        /// The file path
        /// </param>
        private void SendToApplication(string file)
        {
            if (this.userSettingService.GetUserSetting<bool>(UserSettingConstants.SendFile) &&
                !string.IsNullOrEmpty(this.userSettingService.GetUserSetting<string>(UserSettingConstants.SendFileTo)))
            {
                string args = string.Format(
                    "{0} \"{1}\"",
                    this.userSettingService.GetUserSetting<string>(UserSettingConstants.SendFileToArgs),
                    file);
                var vlc =
                    new ProcessStartInfo(
                        this.userSettingService.GetUserSetting<string>(UserSettingConstants.SendFileTo), args);
                Process.Start(vlc);
            }
        }
    }
}