using System;
using System.Drawing;
using System.Linq;
using EDIDParser;
using EDIDParser.Descriptors;
using EDIDParser.Enums;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using NvAPIWrapper.Mosaic;

namespace HeliosDisplayManagement.Shared.NVIDIA
{
    public class SurroundTopologyDisplay : IEquatable<SurroundTopologyDisplay>
    {
        public SurroundTopologyDisplay(GridTopologyDisplay display)
        {
            DisplayId = display.DisplayDevice.DisplayId;
            Rotation = display.Rotation.ToRotation();
            Overlap = new Point(display.Overlap.HorizontalOverlap, display.Overlap.VerticalOverlap);
            PixelShift = display.PixelShiftType.ToPixelShift();

            try
            {
                var bytes = display.DisplayDevice.PhysicalGPU.ReadEDIDData(display.DisplayDevice.Output);
                DisplayName = new EDID(bytes).Descriptors
                    .Where(descriptor => descriptor is StringDescriptor)
                    .Cast<StringDescriptor>()
                    .FirstOrDefault(descriptor => descriptor.Type == StringDescriptorType.MonitorName)?.Value;
            }
            catch
            {
                // ignored
            }
        }

        public SurroundTopologyDisplay()
        {
        }

        public uint DisplayId { get; set; }

        public string DisplayName { get; set; }

        public Point Overlap { get; set; }

        [JsonConverter(typeof(StringEnumConverter))]
        public PixelShift PixelShift { get; set; }

        [JsonConverter(typeof(StringEnumConverter))]
        public Rotation Rotation { get; set; }

        /// <inheritdoc />
        public bool Equals(SurroundTopologyDisplay other)
        {
            if (ReferenceEquals(null, other))
            {
                return false;
            }

            if (ReferenceEquals(this, other))
            {
                return true;
            }

            return DisplayId == other.DisplayId &&
                   Overlap.Equals(other.Overlap) &&
                   PixelShift == other.PixelShift &&
                   Rotation == other.Rotation;
        }

        public static bool operator ==(SurroundTopologyDisplay left, SurroundTopologyDisplay right)
        {
            return Equals(left, right) || left?.Equals(right) == true;
        }

        public static bool operator !=(SurroundTopologyDisplay left, SurroundTopologyDisplay right)
        {
            return !(left == right);
        }

        /// <inheritdoc />
        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj))
            {
                return false;
            }

            if (ReferenceEquals(this, obj))
            {
                return true;
            }

            if (obj.GetType() != GetType())
            {
                return false;
            }

            return Equals((SurroundTopologyDisplay) obj);
        }

        /// <inheritdoc />
        public override int GetHashCode()
        {
            unchecked
            {
                var hashCode = (int) DisplayId;
                hashCode = (hashCode * 397) ^ Overlap.GetHashCode();
                hashCode = (hashCode * 397) ^ (int) PixelShift;
                hashCode = (hashCode * 397) ^ (int) Rotation;

                return hashCode;
            }
        }

        /// <inheritdoc />
        public override string ToString()
        {
            return DisplayName ?? $"SurroundTopologyDisplay #{DisplayId}";
        }

        public GridTopologyDisplay ToGridTopologyDisplay()
        {
            return new GridTopologyDisplay(DisplayId, new Overlap(Overlap.X, Overlap.Y), Rotation.ToRotate(), 0,
                PixelShift.ToPixelShiftType());
        }
    }
}