// --------------------------------------------------------------------------------------------------------------------
// <copyright file="PictureSize.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 PictureSize type.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

namespace HandBrakeWPF.Helpers
{
    using Caliburn.Micro;

    using HandBrake.Interop.Interop.HbLib;
    using HandBrake.Interop.Interop.HbLib.Wrappers.Interfaces;
    using HandBrake.Interop.Interop.Model;
    using HandBrake.Interop.Interop.Model.Encoding;
    using HandBrake.Interop.Interop.Providers.Interfaces;

    using HandBrakeWPF.Services.Interfaces;

    /// <summary>
    /// The picture size Helpers
    /// </summary>
    public class PictureSize
    {
        /// <summary>
        /// The picture settings job.
        /// </summary>
        public class PictureSettingsJob
        {
            /// <summary>
            /// Gets or sets the crop.
            /// </summary>
            public Cropping Crop { get; set; }

            /// <summary>
            /// Gets or sets the modulus.
            /// </summary>
            public int? Modulus { get; set; }

            /// <summary>
            /// Gets or sets the par w.
            /// </summary>
            public int ParW { get; set; }

            /// <summary>
            /// Gets or sets the par h.
            /// </summary>
            public int ParH { get; set; }

            /// <summary>
            /// Gets or sets a value indicating whether itu par.
            /// </summary>
            public bool ItuPar { get; set; }

            /// <summary>
            /// Gets or sets the width.
            /// </summary>
            public int Width { get; set; }

            /// <summary>
            /// Gets or sets the height.
            /// </summary>
            public int Height { get; set; }

            /// <summary>
            /// Gets or sets the anamorphic mode.
            /// </summary>
            public Anamorphic AnamorphicMode { get; set; }

            /// <summary>
            /// Gets or sets the max width.
            /// </summary>
            public int MaxWidth { get; set; }

            /// <summary>
            /// Gets or sets the max height.
            /// </summary>
            public int MaxHeight { get; set; }

            /// <summary>
            /// Gets or sets a value indicating whether keep display aspect.
            /// </summary>
            public bool KeepDisplayAspect { get; set; }

            /// <summary>
            /// Gets or sets the dar width.
            /// </summary>
            public int DarWidth { get; set; }

            /// <summary>
            /// Gets or sets the dar height.
            /// </summary>
            public int DarHeight { get; set; }
        }

        /// <summary>
        /// The picture settings title.
        /// </summary>
        public class PictureSettingsTitle
        {
            /// <summary>
            /// Gets or sets the width.
            /// </summary>
            public int Width { get; set; }

            /// <summary>
            /// Gets or sets the height.
            /// </summary>
            public int Height { get; set; }

            /// <summary>
            /// Gets or sets the par w.
            /// </summary>
            public int ParW { get; set; }

            /// <summary>
            /// Gets or sets the par h.
            /// </summary>
            public int ParH { get; set; }

            /// <summary>
            /// Gets or sets the aspect.
            /// </summary>
            public double Aspect { get; set; }
        }

        /// <summary>
        /// The anamorphic result.
        /// </summary>
        public class AnamorphicResult
        {
            /// <summary>
            /// Gets or sets the output width.
            /// </summary>
            public int OutputWidth { get; set; }

            /// <summary>
            /// Gets or sets the output height.
            /// </summary>
            public int OutputHeight { get; set; }

            /// <summary>
            /// Gets or sets the output par width.
            /// </summary>
            public double OutputParWidth { get; set; }

            /// <summary>
            /// Gets or sets the output par height.
            /// </summary>
            public double OutputParHeight { get; set; }
        }

        /// <summary>
        /// The keep setting.
        /// </summary>
        public enum KeepSetting
        {
            HB_KEEP_WIDTH = 0x01,
            HB_KEEP_HEIGHT = 0x02,
            HB_KEEP_DISPLAY_ASPECT = 0x04
        }

        /// <summary>
        /// The hb_set_anamorphic_size 2.
        /// </summary>
        /// <param name="job">
        /// The job.
        /// </param>
        /// <param name="title">
        /// The title.
        /// </param>
        /// <param name="setting">
        /// The setting.
        /// </param>
        /// <returns>
        /// The <see cref="AnamorphicResult"/>.
        /// </returns>
        public static AnamorphicResult hb_set_anamorphic_size2(PictureSettingsJob job, PictureSettingsTitle title, KeepSetting setting)
        {
            int settingMode = (int)setting + (job.KeepDisplayAspect ? 0x04 : 0);


            hb_rational_t computed_par = new hb_rational_t();
            switch (job.AnamorphicMode)
            {
                case Anamorphic.None:
                    computed_par = new hb_rational_t { den = 1, num = 1 };
                    break;
                case Anamorphic.Custom:
                    computed_par = new hb_rational_t { den = job.ParH, num = job.ParW };
                    break;
                default:
                    computed_par = new hb_rational_t { den = title.ParH, num = title.ParW };
                    break;
            }

            hb_geometry_settings_s uiGeometry = new hb_geometry_settings_s
            {
                crop = new[] { job.Crop.Top, job.Crop.Bottom, job.Crop.Left, job.Crop.Right },
                itu_par = 0,
                keep = settingMode,
                maxWidth = job.MaxWidth,
                maxHeight = job.MaxHeight,
                mode = (int)job.AnamorphicMode,
                modulus = job.Modulus.HasValue ? job.Modulus.Value : 16,
                geometry = new hb_geometry_s { height = job.Height, width = job.Width, par = computed_par }
            };

            hb_geometry_s sourceGeometry = new hb_geometry_s
            {
                width = title.Width,
                height = title.Height,
                par = new hb_rational_t { den = title.ParH, num = title.ParW }
            };

            hb_geometry_s result = new hb_geometry_s();

            IHbFunctionsProvider provider = IoC.Get<IHbFunctionsProvider>(); // TODO make this method non static and remove IoC call.
            IHbFunctions hbFunctions = provider.GetHbFunctionsWrapper();

            hbFunctions.hb_set_anamorphic_size2(ref sourceGeometry, ref uiGeometry, ref result);

            int outputWidth = result.width;
            int outputHeight = result.height;
            int outputParWidth = result.par.num;
            int outputParHeight = result.par.den;
            return new AnamorphicResult { OutputWidth = outputWidth, OutputHeight = outputHeight, OutputParWidth = outputParWidth, OutputParHeight = outputParHeight };
        }
    }
}