using Avalonia.Media.Imaging;
using Avalonia.Platform;
using SixLabors.ImageSharp.PixelFormats;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Processing;
using Avalonia.Media;
using Avalonia.Controls;
using CommunityToolkit.Mvvm.ComponentModel;
using CollabVMSharp;

namespace CollabVMClient.ViewModels
{
    internal partial class CollabVMScreenViewModel : ViewModelBase
    {
        private CollabVMSharp.CollabVMClient cvm;
        public WriteableBitmap Framebuffer { get; set; }
        [ObservableProperty] private string id;
        [ObservableProperty] private int width;
        [ObservableProperty] private int height;
        [ObservableProperty] private int windowHeight;
        [ObservableProperty] private string toggleTurnBtnText = "Take Turn";

        public string Title => $"CollabVM - Screen ({id})";
        public CollabVMScreenViewModel(CollabVMSharp.CollabVMClient cvm, string id)
        {
            this.cvm = cvm;
            cvm.TurnUpdate += (_, _) =>
            {
                if (cvm.TurnStatus == TurnStatus.None) ToggleTurnBtnText = "Take Turn";
                else ToggleTurnBtnText = "End Turn";
            };
            this.Id = id;
            Framebuffer = new WriteableBitmap(new Avalonia.PixelSize(1, 1), new Avalonia.Vector(1, 1));
        }
        public void SetSize(int width, int height)
        {
            this.Width = width;
            this.Height = height;
            this.WindowHeight = height + 34;
            Framebuffer = new WriteableBitmap(new Avalonia.PixelSize(width, height), new Avalonia.Vector(96.0f, 96.0f), PixelFormat.Rgba8888);
        }
        public void LoadRect(byte[] rect, int width, int height, int x, int y)
        {
            // writing this method made me suicidal
            var l = Framebuffer.Lock();
            var byteswritten = 0;
            for (var i = 0; i < height; i++)
            {
                Marshal.Copy(rect, byteswritten, IntPtr.Add(l.Address, (int)(4 * ((y + i) * Framebuffer.Size.Width + x))), width * 4);
                byteswritten += width * 4;
            }
            l.Dispose();
            
        }

        public void ToggleTurn()
        {
            cvm.Turn(cvm.TurnStatus == TurnStatus.None);
        }

        public void MoveMouse(int x, int y) => cvm.MoveMouse(x, y);

        public void MouseBtn(MouseButton btn, bool down) => cvm.MouseBtn(btn, down);

        public bool CanToggleTurn() => true;
    }
}