using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace RBG_Server
{
    /// <summary>
    /// Data class containing information about a player. Drawn directly to the screen, hence the inheritance
    /// of Image, which allows this entire object to be 
    /// </summary>
    public class Player : Grid
    {
        static GradientStopCollection gradientStops = new(5)
        {
            new GradientStop(Color.FromArgb(255, 0, 255, 255), 0),
            new GradientStop(Color.FromArgb(192, 0, 255, 255), 0.75),
            new GradientStop(Color.FromArgb(128, 0, 255, 255), 0.85),
            new GradientStop(Color.FromArgb(32, 0, 255, 255), 0.95),
            new GradientStop(Color.FromArgb(0, 0, 255, 255), 1)
        };
        static RadialGradientBrush shadowBrush = new(gradientStops);

        // C# uses implicit field definitions; i.e. declaring a property creates an implicit private field
        // Note that it is also possible to assign values, and specify access modifiers for the get & set independantly
        public string PlayerName { get; set; }
        public int Row { get; set; }
        public int Column { get; set; }
        public long LastTime { get; set; } = DateTime.Now.Ticks;
        public bool Connected { get; private set; }
        public byte[] UnhandledBuffer { get; set; }

        public Image PlayerSprite { get; set; } = new();
        private Rectangle spriteShadow = new();

        private int processing;

        public int ObtainLock()
        {
            return System.Threading.Interlocked.CompareExchange(ref processing, 1, 0);
        }

        public void ReleaseLock()
        {
            _ = System.Threading.Interlocked.Exchange(ref processing, 0);
        }

        // public Image sprite; // Sprite is now set as the implementation of this class

        public Player(string name, int row, int column) : base() // Call the base constructor at the same time
        {
            PlayerName = name;
            Row = row;
            Column = column;
            LastTime = DateTime.Now.Ticks;
            Connected = true;
            UnhandledBuffer = Array.Empty<byte>();

            spriteShadow.Fill = shadowBrush;
            Children.Add(spriteShadow);
            Children.Add(PlayerSprite);
        }

        public new bool Equals(object obj)
        {
            return (obj as Player).GetHashCode() == GetHashCode();

        }

        public new int GetHashCode()
        {
            int res = (base.GetHashCode() + PlayerName.GetHashCode()) >> 8; // Right-shift the original hashcode by one byte & use our row & column
            int rcByte = ((Row & 0xF) << 4) | (Column & 0xF);
            return (rcByte << 24) | res;
        }
    }
}