// --------------------------------------------------------------------------------------------------------------------
// <copyright file="VideoViewModel.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>
//   The Video View Model
// </summary>
// --------------------------------------------------------------------------------------------------------------------

namespace HandBrakeWPF.ViewModels
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Globalization;
    using System.Linq;

    using Caliburn.Micro;

    using HandBrake.ApplicationServices.EventArgs;
    using HandBrake.ApplicationServices.Services.Encode.Model;
    using HandBrake.ApplicationServices.Services.Encode.Model.Models;
    using HandBrake.ApplicationServices.Services.Encode.Model.Models.Video;
    using HandBrake.ApplicationServices.Services.Scan.Model;
    using HandBrake.ApplicationServices.Utilities;
    using HandBrake.Interop;
    using HandBrake.Interop.Model.Encoding;

    using HandBrakeWPF.Commands.Interfaces;
    using HandBrakeWPF.Properties;
    using HandBrakeWPF.Services.Interfaces;
    using HandBrakeWPF.Services.Presets.Model;
    using HandBrakeWPF.ViewModels.Interfaces;

    using Clipboard = System.Windows.Clipboard;

    /// <summary>
    /// The Video View Model
    /// </summary>
    public class VideoViewModel : ViewModelBase, IVideoViewModel
    {
        /*
         * Hard Code "None" in the Models for Tune.
         * Test Everything         */

        #region Constants and Fields

        private const string SameAsSource = "Same as source";
        private readonly IUserSettingService userSettingService;
        private readonly IAdvancedEncoderOptionsCommand advancedEncoderOptionsCommand;

        private bool displayOptimiseOptions;
        private int qualityMax;
        private int qualityMin;
        private bool showPeakFramerate;
        private int rf;
        private bool canClear;
        private bool useAdvancedTab;
        private bool displayTurboFirstPass;
        private int videoPresetMaxValue;
        private int videoPresetValue;
        private bool displayNonQsvControls;
        private VideoTune videoTune;
        private bool fastDecode;
        private bool displayTuneControls;

        #endregion

        #region Constructors and Destructors

        /// <summary>
        /// Initializes a new instance of the <see cref="VideoViewModel"/> class.
        /// </summary>
        /// <param name="userSettingService">
        /// The user Setting Service.
        /// </param>
        /// <param name="advancedEncoderOptionsCommand">
        /// The advanced Encoder Options Command.
        /// </param>
        public VideoViewModel(IUserSettingService userSettingService, IAdvancedEncoderOptionsCommand advancedEncoderOptionsCommand)
        {
            this.Task = new EncodeTask { VideoEncoder = VideoEncoder.X264 };
            this.userSettingService = userSettingService;
            this.advancedEncoderOptionsCommand = advancedEncoderOptionsCommand;
            this.QualityMin = 0;
            this.QualityMax = 51;
            this.IsConstantQuantity = true;
            this.VideoEncoders = EnumHelper<VideoEncoder>.GetEnumList();

            this.VideoProfiles = new BindingList<VideoProfile>();
            this.VideoTunes = new BindingList<VideoTune>();
            this.VideoPresets = new BindingList<VideoPreset>();
            this.VideoLevels = new BindingList<VideoLevel>();

            this.userSettingService.SettingChanged += this.UserSettingServiceSettingChanged;
        }

        #endregion

        #region Public Properties

        /// <summary>
        /// Gets or sets the current Encode Task.
        /// </summary>
        public EncodeTask Task { get; set; }

        /// <summary>
        /// Gets a value indicating whether show advanced tab.
        /// </summary>
        public bool ShowAdvancedTab
        {
            get
            {
                bool showAdvTabSetting = this.userSettingService.GetUserSetting<bool>(UserSettingConstants.ShowAdvancedTab);
                if (!showAdvTabSetting)
                {
                    this.UseAdvancedTab = false;
                }

                if (this.SelectedVideoEncoder == VideoEncoder.QuickSync)
                {
                    return false;
                }

                return showAdvTabSetting;
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether use video tab.
        /// </summary>
        public bool UseAdvancedTab
        {
            get
            {
                return this.useAdvancedTab;
            }
            set
            {
                if (!Equals(value, this.useAdvancedTab))
                {
                    // Set the Advanced Tab up with the current settings, if we can.
                    if (value)
                    {
                        this.Task.AdvancedEncoderOptions = this.GetActualx264Query();
                    }

                    if (!value)
                    {
                        this.Task.AdvancedEncoderOptions = string.Empty;
                    }

                    this.useAdvancedTab = value;
                    this.Task.ShowAdvancedTab = value;
                    this.NotifyOfPropertyChange(() => this.UseAdvancedTab);
                }
            }
        }

        /// <summary>
        /// Gets Framerates.
        /// </summary>
        public IEnumerable<string> Framerates
        {
            get
            {
                return new List<string> { "Same as source", "5", "10", "12", "15", "23.976", "24", "25", "29.97", "30", "50", "59.94", "60" };
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether IsConstantFramerate.
        /// </summary>
        public bool IsConstantFramerate
        {
            get
            {
                return this.Task.FramerateMode == FramerateMode.CFR;
            }
            set
            {
                if (value)
                {
                    this.Task.FramerateMode = FramerateMode.CFR;
                    this.IsVariableFramerate = false;
                    this.IsPeakFramerate = false;
                }

                this.NotifyOfPropertyChange(() => this.IsConstantFramerate);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether IsConstantQuantity.
        /// </summary>
        public bool IsConstantQuantity
        {
            get
            {
                return this.Task.VideoEncodeRateType == VideoEncodeRateType.ConstantQuality;
            }
            set
            {
                if (value)
                {
                    this.Task.VideoEncodeRateType = VideoEncodeRateType.ConstantQuality;
                    this.Task.TwoPass = false;
                    this.Task.TurboFirstPass = false;
                    this.Task.VideoBitrate = null;
                    this.NotifyOfPropertyChange(() => this.Task);
                }
                else
                {
                    this.Task.VideoEncodeRateType = VideoEncodeRateType.AverageBitrate;
                }

                this.NotifyOfPropertyChange(() => this.IsConstantQuantity);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether IsPeakFramerate.
        /// </summary>
        public bool IsPeakFramerate
        {
            get
            {
                return this.Task.FramerateMode == FramerateMode.PFR;
            }
            set
            {
                if (value)
                {
                    this.Task.FramerateMode = FramerateMode.PFR;
                    this.IsVariableFramerate = false;
                    this.IsConstantFramerate = false;
                }

                this.NotifyOfPropertyChange(() => this.IsPeakFramerate);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether IsVariableFramerate.
        /// </summary>
        public bool IsVariableFramerate
        {
            get
            {
                return this.Task.FramerateMode == FramerateMode.VFR;
            }
            set
            {
                if (value)
                {
                    this.IsPeakFramerate = false;
                    this.IsConstantFramerate = false;
                    this.Task.FramerateMode = FramerateMode.VFR;
                }

                this.NotifyOfPropertyChange(() => this.IsVariableFramerate);
            }
        }

        /// <summary>
        /// Gets a value indicating whether is lossless.
        /// </summary>
        public bool IsLossless
        {
            get
            {
                return 0.0.Equals(this.DisplayRF) && this.SelectedVideoEncoder == VideoEncoder.X264;
            }
        }

        /// <summary>
        /// Gets or sets QualityMax.
        /// </summary>
        public int QualityMax
        {
            get
            {
                return this.qualityMax;
            }
            set
            {
                if (!qualityMax.Equals(value))
                {
                    this.qualityMax = value;
                    this.NotifyOfPropertyChange(() => this.QualityMax);
                }
            }
        }

        /// <summary>
        /// Gets or sets QualityMin.
        /// </summary>
        public int QualityMin
        {
            get
            {
                return this.qualityMin;
            }
            set
            {
                if (!qualityMin.Equals(value))
                {
                    this.qualityMin = value;
                    this.NotifyOfPropertyChange(() => this.QualityMin);
                }
            }
        }

        /// <summary>
        /// Gets or sets RF.
        /// </summary>
        public int RF
        {
            get
            {
                return rf;
            }
            set
            {
                this.rf = value;

                this.SetQualitySliderBounds();
                switch (this.SelectedVideoEncoder)
                {
                    case VideoEncoder.FFMpeg:
                    case VideoEncoder.FFMpeg2:
                        this.Task.Quality = (32 - value);
                        break;    
                    case VideoEncoder.VP8:
                        this.Task.Quality = (63 - value);
                        break;
                    case VideoEncoder.X264:
                    case VideoEncoder.X265:
                        double cqStep = userSettingService.GetUserSetting<double>(UserSettingConstants.X264Step);
                        double rfValue = 51.0 - value * cqStep;
                        rfValue = Math.Round(rfValue, 2);
                        this.Task.Quality = rfValue;
                        break;           
                    case VideoEncoder.QuickSync:
                        rfValue = 51.0 - value;
                        rfValue = Math.Round(rfValue, 0);
                        this.Task.Quality = rfValue;
                        break;
                    case VideoEncoder.Theora:                 
                        Task.Quality = value;
                        break;
                }

                this.NotifyOfPropertyChange(() => this.RF);
                this.NotifyOfPropertyChange(() => this.DisplayRF);
                this.NotifyOfPropertyChange(() => this.IsLossless);
            }
        }

        /// <summary>
        /// Gets DisplayRF.
        /// </summary>
        public double DisplayRF
        {
            get
            {
                return Task.Quality.HasValue ? this.Task.Quality.Value : 0;
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether two pass.
        /// </summary>
        public bool TwoPass
        {
            get
            {
                return this.Task.TwoPass;
            }

            set
            {
                this.Task.TwoPass = value;
                this.NotifyOfPropertyChange(() => this.TwoPass);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether turbo first pass.
        /// </summary>
        public bool TurboFirstPass
        {
            get
            {
                return this.Task.TurboFirstPass;
            }

            set
            {
                this.Task.TurboFirstPass = value;
                this.NotifyOfPropertyChange(() => this.TurboFirstPass);
            }
        }

        /// <summary>
        /// Gets the rfqp.
        /// </summary>
        public string Rfqp
        {
            get
            {
                return this.SelectedVideoEncoder == VideoEncoder.X264 || this.SelectedVideoEncoder == VideoEncoder.X265 ? "RF" : "QP";
            }
        }

        /// <summary>
        /// Gets the high quality label.
        /// </summary>
        public string HighQualityLabel
        {
            get
            {
                return this.SelectedVideoEncoder == VideoEncoder.X264 ? Resources.Video_PlaceboQuality : Resources.Video_HigherQuality;
            }
        }

        /// <summary>
        /// Gets or sets SelectedFramerate.
        /// </summary>
        public string SelectedFramerate
        {
            get
            {
                if (this.Task.Framerate == null)
                {
                    return "Same as source";
                }

                return this.Task.Framerate.Value.ToString(CultureInfo.InvariantCulture);
            }
            set
            {
                if (value == "Same as source")
                {
                    this.Task.Framerate = null;
                    this.ShowPeakFramerate = false;

                    if (this.Task.FramerateMode == FramerateMode.PFR)
                    {
                        this.IsVariableFramerate = true;
                    }
                }
                else if (!string.IsNullOrEmpty(value))
                {
                    this.ShowPeakFramerate = true;
                    if (this.Task.FramerateMode == FramerateMode.VFR)
                    {
                        this.IsPeakFramerate = true;
                    }
                    this.Task.Framerate = double.Parse(value, CultureInfo.InvariantCulture);
                }

                this.NotifyOfPropertyChange(() => this.SelectedFramerate);
                this.NotifyOfPropertyChange(() => this.Task);
            }
        }

        /// <summary>
        /// Gets or sets SelectedVideoEncoder.
        /// </summary>
        public VideoEncoder SelectedVideoEncoder
        {
            get
            {
                return this.Task.VideoEncoder;
            }
            set
            {
                this.Task.VideoEncoder = value;
                this.NotifyOfPropertyChange(() => this.SelectedVideoEncoder);
                HandleEncoderChange(this.Task.VideoEncoder);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether ShowPeakFramerate.
        /// </summary>
        public bool ShowPeakFramerate
        {
            get
            {
                return this.showPeakFramerate;
            }
            set
            {
                this.showPeakFramerate = value;
                this.NotifyOfPropertyChange(() => this.ShowPeakFramerate);
            }
        }

        /// <summary>
        /// Gets or sets VideoEncoders.
        /// </summary>
        public IEnumerable<VideoEncoder> VideoEncoders { get; set; }

        /// <summary>
        /// Gets or sets the extra arguments.
        /// </summary>
        public string ExtraArguments
        {
            get
            {
                return this.Task.ExtraAdvancedArguments;
            }
            set
            {
                if (!Equals(this.Task.ExtraAdvancedArguments, value))
                {
                    this.Task.ExtraAdvancedArguments = value;
                    this.NotifyOfPropertyChange(() => this.ExtraArguments);
                    this.NotifyOfPropertyChange(() => FullOptionsTooltip);
                }
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether to display H264
        /// </summary>
        public bool DisplayOptimiseOptions
        {
            get
            {
                return this.displayOptimiseOptions;
            }
            set
            {
                this.displayOptimiseOptions = value;
                this.NotifyOfPropertyChange(() => this.DisplayOptimiseOptions);
                this.NotifyOfPropertyChange(() => FullOptionsTooltip);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether display non qsv controls.
        /// </summary>
        public bool DisplayNonQSVControls
        {
            get
            {
                return this.displayNonQsvControls;
            }
            set
            {
                if (value.Equals(this.displayNonQsvControls))
                {
                    return;
                }
                this.displayNonQsvControls = value;
                this.NotifyOfPropertyChange(() => this.DisplayNonQSVControls);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether display tune controls.
        /// </summary>
        public bool DisplayTuneControls
        {
            get
            {
                return this.displayTuneControls;
            }
            set
            {
                if (value.Equals(this.displayTuneControls))
                {
                    return;
                }
                this.displayTuneControls = value;
                this.NotifyOfPropertyChange(() => this.DisplayTuneControls);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether fast decode.
        /// </summary>
        public bool FastDecode
        {
            get
            {
                return this.fastDecode;
            }
            set
            {
                if (value.Equals(this.fastDecode))
                {
                    return;
                }
                this.fastDecode = value;
                this.NotifyOfPropertyChange(() => this.FastDecode);
                this.NotifyOfPropertyChange(() => FullOptionsTooltip);
                ResetAdvancedTab();

                // Update the encode task
                if (value && !this.Task.VideoTunes.Contains(VideoTune.FastDecode))
                {
                    this.Task.VideoTunes.Add(VideoTune.FastDecode);
                }
                else
                {
                    this.Task.VideoTunes.Remove(VideoTune.FastDecode);
                }          
            }
        }

        /// <summary>
        /// Gets or sets the video preset.
        /// </summary>
        public VideoPreset VideoPreset
        {
            get
            {
                return this.Task.VideoPreset;
            }
            set
            {
                this.Task.VideoPreset = value;
                this.NotifyOfPropertyChange(() => this.VideoPreset);
                this.NotifyOfPropertyChange(() => FullOptionsTooltip);
                ResetAdvancedTab();
            }
        }

        /// <summary>
        /// Gets or sets the video preset value.
        /// </summary>
        public int VideoPresetValue
        {
            get
            {
                return this.videoPresetValue;
            }
            set
            {
                this.videoPresetValue = value;

                HBVideoEncoder encoder = HandBrakeEncoderHelpers.VideoEncoders.FirstOrDefault(s => s.ShortName == EnumHelper<VideoEncoder>.GetShortName(this.SelectedVideoEncoder));
                if (encoder != null)
                {
                    string preset = encoder.Presets[value];
                    this.VideoPreset = new VideoPreset(preset, preset);
                }

                this.NotifyOfPropertyChange(() => this.VideoPresetValue);
            }
        }

        /// <summary>
        /// Gets or sets the video preset max value.
        /// </summary>
        public int VideoPresetMaxValue
        {
            get
            {
                return this.videoPresetMaxValue;
            }

            set
            {
                if (value == this.videoPresetMaxValue)
                {
                    return;
                }
                this.videoPresetMaxValue = value;
                this.NotifyOfPropertyChange(() => this.VideoPresetMaxValue);
            }
        }

        /// <summary>
        /// Gets or sets the video tune.
        /// </summary>
        public VideoTune VideoTune
        {
            get
            {
                return this.videoTune;
            }
            set
            {
                if (Equals(value, this.videoTune))
                {
                    return;
                }
                this.videoTune = value;
                this.NotifyOfPropertyChange(() => this.VideoTune);
                this.NotifyOfPropertyChange(() => FullOptionsTooltip);
                ResetAdvancedTab();

                // Update the encode task.
                this.Task.VideoTunes.Clear();
                if (value != null && !Equals(value, VideoTune.None))
                {
                    this.Task.VideoTunes.Add(value);
                }

                if (this.FastDecode)
                {
                    this.Task.VideoTunes.Add(VideoTune.FastDecode);
                }
            }
        }

        /// <summary>
        /// Gets or sets the video profile.
        /// </summary>
        public VideoProfile VideoProfile
        {
            get
            {
                return this.Task.VideoProfile;
            }
            set
            {
                this.Task.VideoProfile = value;
                this.NotifyOfPropertyChange(() => this.VideoProfile);
                this.NotifyOfPropertyChange(() => FullOptionsTooltip);
                ResetAdvancedTab();
            }
        }

        /// <summary>
        /// Gets or sets the video level.
        /// </summary>
        public VideoLevel VideoLevel
        {
            get
            {
                return this.Task.VideoLevel;
            }
            set
            {
                this.Task.VideoLevel = value;
                this.NotifyOfPropertyChange(() => this.VideoLevel);
                this.NotifyOfPropertyChange(() => FullOptionsTooltip);
                ResetAdvancedTab();
            }
        }

        /// <summary>
        /// Gets or sets the video presets.
        /// </summary>
        public BindingList<VideoPreset> VideoPresets { get; set; }

        /// <summary>
        /// Gets or sets the video tunes.
        /// </summary>
        public BindingList<VideoTune> VideoTunes { get; set; }

        /// <summary>
        /// Gets or sets the video profiles.
        /// </summary>
        public BindingList<VideoProfile> VideoProfiles { get; set; }

        /// <summary>
        /// Gets or sets the video levels.
        /// </summary>
        public BindingList<VideoLevel> VideoLevels { get; set; }

        /// <summary>
        /// Gets the full options tooltip.
        /// </summary>
        public string FullOptionsTooltip
        {
            get
            {
                return string.Format(Resources.Video_EncoderExtraArgs, this.GetActualx264Query()); // "You can provide additional arguments using the standard x264 format"; 
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether display turbo first pass.
        /// </summary>
        public bool DisplayTurboFirstPass
        {
            get
            {
                return this.displayTurboFirstPass;
            }
            set
            {
                if (value.Equals(this.displayTurboFirstPass))
                {
                    return;
                }
                this.displayTurboFirstPass = value;
                this.NotifyOfPropertyChange(() => this.DisplayTurboFirstPass);
            }
        }

        #endregion

        #region Public Methods

        /// <summary>
        /// Setup this window for a new source
        /// </summary>
        /// <param name="source">
        /// The source.
        /// </param>
        /// <param name="title">
        /// The title.
        /// </param>
        /// <param name="preset">
        /// The preset.
        /// </param>
        /// <param name="task">
        /// The task.
        /// </param>
        public void SetSource(Source source, Title title, Preset preset, EncodeTask task)
        {
            this.Task = task;
        }

        /// <summary>
        /// Setup this tab for the specified preset.
        /// </summary>
        /// <param name="preset">
        /// The preset.
        /// </param>
        /// <param name="task">
        /// The task.
        /// </param>
        public void SetPreset(Preset preset, EncodeTask task)
        {
            this.Task = task;
            if (preset == null || preset.Task == null)
            {
                return;
            }

            this.SelectedVideoEncoder = preset.Task.VideoEncoder;
            this.SelectedFramerate = preset.Task.Framerate.HasValue ? preset.Task.Framerate.Value.ToString(CultureInfo.InvariantCulture) : SameAsSource;

            this.IsConstantQuantity = preset.Task.VideoEncodeRateType == VideoEncodeRateType.ConstantQuality;

            switch (preset.Task.FramerateMode)
            {
                case FramerateMode.CFR:
                    this.IsConstantFramerate = true;
                    break;
                case FramerateMode.VFR:
                    this.IsVariableFramerate = true;
                    this.ShowPeakFramerate = false;
                    break;
                case FramerateMode.PFR:
                    this.IsPeakFramerate = true;
                    this.ShowPeakFramerate = true;
                    break;
            }

            this.SetRF(preset.Task.Quality);
         
            this.TwoPass = preset.Task.TwoPass;
            this.TurboFirstPass = preset.Task.TurboFirstPass;
            this.Task.VideoBitrate = preset.Task.VideoBitrate;

            this.NotifyOfPropertyChange(() => this.Task);

            if (preset.Task != null)
            {
                this.HandleEncoderChange(preset.Task.VideoEncoder);

                HBVideoEncoder encoder = HandBrakeEncoderHelpers.VideoEncoders.FirstOrDefault(s => s.ShortName == EnumHelper<VideoEncoder>.GetShortName(preset.Task.VideoEncoder));
                if (encoder != null)
                {
                    if (preset.Task.VideoEncoder == VideoEncoder.X264 || preset.Task.VideoEncoder == VideoEncoder.X265 || preset.Task.VideoEncoder == VideoEncoder.QuickSync)
                    {
                        this.VideoLevel = preset.Task.VideoLevel != null ? preset.Task.VideoLevel.Clone() : this.VideoLevels.FirstOrDefault();
                        this.VideoProfile = preset.Task.VideoProfile != null ? preset.Task.VideoProfile.Clone() : this.VideoProfiles.FirstOrDefault();
                        this.VideoPresetValue = preset.Task.VideoPreset != null ? this.VideoPresets.IndexOf(preset.Task.VideoPreset) : 0;
                        this.FastDecode = preset.Task.VideoTunes != null && preset.Task.VideoTunes.Contains(VideoTune.FastDecode);
                        this.VideoTune = preset.Task.VideoTunes != null && preset.Task.VideoTunes.Any() ? preset.Task.VideoTunes.FirstOrDefault(t => !Equals(t, VideoTune.FastDecode)) : this.VideoTunes.FirstOrDefault();
                    }
                }

                this.ExtraArguments = preset.Task.ExtraAdvancedArguments;
                this.UseAdvancedTab = !string.IsNullOrEmpty(preset.Task.AdvancedEncoderOptions) && this.ShowAdvancedTab;
            }
        }

        /// <summary>
        /// Update all the UI controls based on the encode task passed in.
        /// </summary>
        /// <param name="task">
        /// The task.
        /// </param>
        public void UpdateTask(EncodeTask task)
        {
            this.Task = task;
            this.SetRF(task.Quality);

            this.NotifyOfPropertyChange(() => this.IsConstantFramerate);
            this.NotifyOfPropertyChange(() => this.IsConstantQuantity);
            this.NotifyOfPropertyChange(() => this.IsPeakFramerate);
            this.NotifyOfPropertyChange(() => this.IsVariableFramerate);
            this.NotifyOfPropertyChange(() => this.SelectedVideoEncoder);
            this.NotifyOfPropertyChange(() => this.SelectedFramerate);
            this.NotifyOfPropertyChange(() => this.QualityMax);
            this.NotifyOfPropertyChange(() => this.QualityMin);
            this.NotifyOfPropertyChange(() => this.RF);
            this.NotifyOfPropertyChange(() => this.DisplayRF);
            this.NotifyOfPropertyChange(() => this.IsLossless);
            this.NotifyOfPropertyChange(() => this.Task.VideoBitrate);
            this.NotifyOfPropertyChange(() => this.Task.Quality);
            this.NotifyOfPropertyChange(() => this.Task.TwoPass);
            this.NotifyOfPropertyChange(() => this.Task.TurboFirstPass);

            this.NotifyOfPropertyChange(() => this.VideoTune);
            this.NotifyOfPropertyChange(() => this.VideoProfile);
            this.NotifyOfPropertyChange(() => this.VideoProfile);
            this.NotifyOfPropertyChange(() => this.VideoLevel);
            this.NotifyOfPropertyChange(() => this.FastDecode);
            this.NotifyOfPropertyChange(() => this.ExtraArguments);
        }

        /// <summary>
        /// Trigger a Notify Property Changed on the Task to force various UI elements to update.
        /// </summary>
        public void RefreshTask()
        {
            this.NotifyOfPropertyChange(() => this.Task);

            if ((Task.OutputFormat == OutputFormat.Mp4) && this.SelectedVideoEncoder == VideoEncoder.Theora)
            {
                this.SelectedVideoEncoder = VideoEncoder.X264;
            }
        }

        /// <summary>
        /// Clear advanced settings.
        /// </summary>
        public void ClearAdvancedSettings()
        {
            this.canClear = false;
            this.FastDecode = false;
            this.VideoTune = null;
            this.VideoProfile = new VideoProfile("auto", "auto");
            this.VideoPreset = null;
            this.VideoPresetValue = 1;
            this.VideoLevel = new VideoLevel("auto", "auto");

            this.ExtraArguments = string.Empty;
            this.canClear = true;
        }

        /// <summary>
        /// The copy query.
        /// </summary>
        public void CopyQuery()
        {
            Clipboard.SetDataObject(this.SelectedVideoEncoder == VideoEncoder.X264 ? this.GetActualx264Query() : this.ExtraArguments);
        }

        #endregion

        /// <summary>
        /// Set the bounds of the Constant Quality Slider
        /// </summary>
        private void SetQualitySliderBounds()
        {
            // Note Updating bounds to the same values won't trigger an update.
            // The properties are smart enough to not take in equal values.
            switch (this.SelectedVideoEncoder)
            {
                case VideoEncoder.FFMpeg:
                case VideoEncoder.FFMpeg2:
                    this.QualityMin = 1;
                    this.QualityMax = 31;
                    break;
                case VideoEncoder.QuickSync:
                    this.QualityMin = 0;
                    this.QualityMax = 51;
                    break;
                case VideoEncoder.X264:
                case VideoEncoder.X265:
                    this.QualityMin = 0;
                    this.QualityMax = (int)(51 / userSettingService.GetUserSetting<double>(UserSettingConstants.X264Step));
                    break;
                case VideoEncoder.Theora:
                case VideoEncoder.VP8:
                    this.QualityMin = 0;
                    this.QualityMax = 63;
                    break;
            }
        }

        /// <summary>
        /// Reset advanced tab.
        /// </summary>
        private void ResetAdvancedTab()
        {
            if (canClear)
            {
                this.advancedEncoderOptionsCommand.ExecuteClearAdvanced();
            }
        }

        /// <summary>
        /// The get actualx 264 query.
        /// </summary>
        /// <returns>
        /// The <see cref="string"/>.
        /// </returns>
        private string GetActualx264Query()
        {
            if (!GeneralUtilities.IsLibHbPresent)
            {
                return string.Empty; // Feature is disabled.
            }

            string preset = this.VideoPreset != null ? this.VideoPreset.ShortName : string.Empty;
            string profile = this.VideoProfile != null ? this.VideoProfile.ShortName : string.Empty; 

            List<string> tunes = new List<string>();
            if (this.VideoTune != null && this.VideoTune.ShortName != "none")
            {
                tunes.Add(this.VideoTune.ShortName);
            }
            if (this.FastDecode)
            {
                tunes.Add("fastdecode");
            }

            // Get the width or height, default if we don't have it yet so we don't crash.
            int width = this.Task.Width.HasValue ? this.Task.Width.Value : 720;
            int height = this.Task.Height.HasValue ? this.Task.Height.Value : 576;

            if (height == 0)
            {
                height = 576;
            }

            if (width == 0)
            {
                width = 720;
            }

            try
            {
                return HandBrakeUtils.CreateX264OptionsString(
                    preset, 
                    tunes, 
                    this.ExtraArguments, 
                    profile, 
                    this.VideoLevel != null ? this.VideoLevel.ShortName : string.Empty, 
                    width, 
                    height);
            }
            catch (Exception)
            {
                return "Error: Libhb not loaded.";
            }
        }

        /// <summary>
        /// The user setting service_ setting changed.
        /// </summary>
        /// <param name="sender">
        /// The sender.
        /// </param>
        /// <param name="e">
        /// The e.
        /// </param>
        private void UserSettingServiceSettingChanged(object sender, SettingChangedEventArgs e)
        {
            if (e.Key == UserSettingConstants.ShowAdvancedTab)
            {
                this.NotifyOfPropertyChange(() => this.ShowAdvancedTab);
            }
        }

        /// <summary>
        /// The set rf.
        /// </summary>
        /// <param name="quality">
        /// The quality.
        /// </param>
        private void SetRF(double? quality)
        {
            double cqStep = userSettingService.GetUserSetting<double>(UserSettingConstants.X264Step);
            double rfValue = 0;
            this.SetQualitySliderBounds();
            switch (this.SelectedVideoEncoder)
            {
                case VideoEncoder.FFMpeg:
                case VideoEncoder.FFMpeg2:
                    if (quality.HasValue)
                    {
                        int cq;
                        int.TryParse(quality.Value.ToString(CultureInfo.InvariantCulture), out cq);
                        this.RF = 32 - cq;
                    }
                    break;
                case VideoEncoder.VP8:
                    if (quality.HasValue)
                    {
                        int cq;
                        int.TryParse(quality.Value.ToString(CultureInfo.InvariantCulture), out cq);
                        this.RF = 63 - cq;
                    }
                    break;
                case VideoEncoder.X265:
                case VideoEncoder.X264:
                case VideoEncoder.QuickSync:

                    if (this.SelectedVideoEncoder == VideoEncoder.QuickSync)
                    {
                        cqStep = 1;
                    }
                    double multiplier = 1.0 / cqStep;
                    if (quality.HasValue)
                    {
                        rfValue = quality.Value * multiplier;
                    }

                    this.RF = this.QualityMax - (int)Math.Round(rfValue, 0);

                    break;

                case VideoEncoder.Theora:

                    if (quality.HasValue)
                    {
                        this.RF = (int)quality.Value;
                    }
                    break;
            }
        }

        /// <summary>
        /// The handle encoder change.
        /// </summary>
        /// <param name="selectedEncoder">
        /// The selected encoder.
        /// </param>
        private void HandleEncoderChange(VideoEncoder selectedEncoder)
        {
            HBVideoEncoder encoder = HandBrakeEncoderHelpers.VideoEncoders.FirstOrDefault(s => s.ShortName == EnumHelper<VideoEncoder>.GetShortName(selectedEncoder));
            if (encoder != null)
            {
                // Setup Profile
                this.VideoProfiles.Clear();
                if (encoder.Profiles != null)
                {
                    foreach (var item in encoder.Profiles)
                    {
                        this.VideoProfiles.Add(new VideoProfile(item, item));
                    }
                    this.VideoProfile = this.VideoProfiles.FirstOrDefault();
                }
                else
                {
                    this.VideoProfile = null;
                }

                // Setup Tune
                this.VideoTunes.Clear();
                if (encoder.Tunes != null)
                {
                    this.VideoTunes.Add(VideoTune.None);
                    foreach (var item in encoder.Tunes)
                    {
                        if (item != VideoTune.FastDecode.ShortName)
                        {
                            this.VideoTunes.Add(new VideoTune(item, item));
                        }
                    }
                    this.FastDecode = false;
                    this.VideoTune = VideoTune.None;
                }
                else
                {
                    this.FastDecode = false;
                    this.VideoTune = VideoTune.None;
                }

                // Setup Levels
                this.VideoLevels.Clear();
                if (encoder.Levels != null)
                {
                    foreach (var item in encoder.Levels)
                    {
                        this.VideoLevels.Add(new VideoLevel(item, item));
                    }

                    this.VideoLevel = this.VideoLevels.FirstOrDefault();
                }
                else
                {
                    this.VideoLevel = VideoLevel.Auto;
                }
                

                // Setup Presets.
                this.VideoPresets.Clear();
                if (encoder.Presets != null)
                {
                    foreach (var item in encoder.Presets)
                    {
                        this.VideoPresets.Add(new VideoPreset(item, item));
                    }

                    this.VideoPresetMaxValue = encoder.Presets.Count - 1;
                    int middlePreset = (int)Math.Round((decimal)(this.VideoPresetMaxValue / 2), 0);
                    this.VideoPreset = new VideoPreset(encoder.Presets[middlePreset], encoder.Presets[middlePreset]);
                }
                else
                {
                    this.VideoPreset = null;
                }
            }

            // Tell the Advanced Panel off the change
            IAdvancedViewModel advancedViewModel = IoC.Get<IAdvancedViewModel>();
            advancedViewModel.SetEncoder(this.Task.VideoEncoder);

            // Update the Quality Slider. Make sure the bounds are up to date with the users settings.
            this.SetQualitySliderBounds();


            // Update control display
            this.UseAdvancedTab = selectedEncoder != VideoEncoder.QuickSync && this.UseAdvancedTab;
            this.DisplayOptimiseOptions = this.SelectedVideoEncoder == VideoEncoder.X264 || this.SelectedVideoEncoder == VideoEncoder.X265 || this.SelectedVideoEncoder == VideoEncoder.QuickSync;
            this.DisplayNonQSVControls = this.SelectedVideoEncoder != VideoEncoder.QuickSync;
            this.DisplayTurboFirstPass = selectedEncoder == VideoEncoder.X264;
            this.DisplayTuneControls = SelectedVideoEncoder == VideoEncoder.X264;

            // Refresh Display
            this.NotifyOfPropertyChange(() => this.Rfqp);
            this.NotifyOfPropertyChange(() => this.ShowAdvancedTab);
            this.NotifyOfPropertyChange(() => this.HighQualityLabel);

            // Handle some quicksync specific options.
            if (selectedEncoder == VideoEncoder.QuickSync)
            {
                this.IsConstantFramerate = true;
                this.TwoPass = false;
                this.TurboFirstPass = false;
                this.Task.Framerate = null;
                this.NotifyOfPropertyChange(() => SelectedFramerate);
                this.UseAdvancedTab = false;
            }
        }
    }
}