using System;
using System.Drawing;
using System.Windows.Forms;

namespace Mitria_Minecraft_Launcher
{
    public partial class LoadingScreen : UserControl
    {
        private readonly Bitmap _bitmap;
        private Size imageSize;
        private int LocationX;
        private int LocationY;

        public LoadingScreen(Bitmap bitmap)
        {
            this.SetStyle(ControlStyles.DoubleBuffer, true);
            this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            this.SetStyle(ControlStyles.UserPaint, true);

        
            _bitmap = bitmap;

            imageSize = ResizeCalculator(this.Size.Width, this.Size.Height, _bitmap.Width, _bitmap.Height);
            LocationChange();
            this.TabStop = false;
            InitializeComponent();
        }

        protected override void OnLoad(EventArgs e)
        {
            ImageAnimator.Animate(_bitmap, new EventHandler(this.OnFrameChanged));
            base.OnLoad(e);
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            ImageAnimator.UpdateFrames();

            e.Graphics.DrawImage(this._bitmap, LocationX, LocationY, imageSize.Width, imageSize.Height);

            base.OnPaint(e);
           
        }

        private void OnFrameChanged(object sender, EventArgs e)
        {
            this.Invalidate();
        }

        private Size ResizeCalculator(int paletteWidth, int paletteHeight, int imageWidth, int imageHeigh)
        {
            double ratioX = paletteWidth / (double)imageWidth;
            double ratioY = paletteHeight / (double)imageHeigh;

            double ratio = Math.Min(ratioX, ratioY);

            int newWidth = (int)(imageWidth * ratio);
            int newHeight = (int)(imageHeigh * ratio);
            Size newSize = new Size(newWidth, newHeight);
            return newSize;
        }

        private void LocationChange()
        {
            // 로케이션 계산
            int needx = imageSize.Width / 2;
            int needy = imageSize.Height / 2;
            int locationXCenter = this.Size.Width / 2;
            int locationYCenter = this.Size.Height / 2;

            LocationX = locationXCenter - needx;
            LocationY = locationYCenter - needy;
        }

        private void LoadingScreen_SizeChanged(object sender, EventArgs e)
        {
            imageSize = ResizeCalculator(this.Size.Width, this.Size.Height, _bitmap.Width, _bitmap.Height);
            LocationChange();
        }
    }
}