// ClassicalSharp copyright 2014-2016 UnknownShadow200 | Licensed under MIT
#if ANDROID
using System;
using System.Collections.Generic;
using Android.Graphics;
using Android.Graphics.Drawables;

namespace ClassicalSharp {

	public sealed partial class CanvasDrawer2D : IDrawer2D {

		Dictionary<int, Paint> brushCache = new Dictionary<int, Paint>( 16 );		
		Bitmap curBmp;
		Canvas c;
		
		public override void SetBitmap( Bitmap bmp ) {
			if( c != null ) {
				Utils.LogDebug( "Previous IDrawer2D.SetBitmap() call was not properly disposed" );
				c.Dispose();
			}
			
			c = new Canvas( bmp );
			curBmp = bmp;
		}
		
		public override Bitmap ConvertTo32Bpp( Bitmap src ) { return src; }

		public override void DrawRect( FastColour colour, int x, int y, int width, int height ) {
			RectF rec = new RectF( x, y, x + width, y + height );
			Paint brush = GetOrCreateBrush( colour );
			c.DrawRect( rec, brush );
		}
		
		public override void DrawRectBounds( FastColour colour, float lineWidth, int x, int y, int width, int height ) {
			RectF rec = new RectF( x, y, x + width, y + height );
			Paint brush = GetOrCreateBrush( colour );
			brush.SetStyle( Paint.Style.Stroke );
			c.DrawRect( rec, brush );
			brush.SetStyle( Paint.Style.FillAndStroke );
		}
		
		[Obsolete]
		public override void DrawRoundedRect( FastColour colour, float radius, float x, float y, float width, float height ) {
			RectF rec = new RectF( x, y, x + width, y + height );
			c.DrawRoundRect( rec, radius, radius, GetOrCreateBrush( colour ) );
		}
		
		public override void Clear( FastColour colour ) {
			c.DrawColor( colour );
		}
		
		public override void Clear( FastColour colour, int x, int y, int width, int height ) {
			RectF rec = new RectF( x, y, x + width, y + height );
			Paint brush = GetOrCreateBrush( colour );
			brush.AntiAlias = false;
			c.DrawRect( rec, brush );
			brush.AntiAlias = true;
		}

		public override void Dispose() {
			c.Dispose();
			c = null;
		}
		
		public override void DisposeInstance() {
			foreach( var pair in brushCache )
				pair.Value.Dispose();
			
			DisposeText();
			DisposeBitmappedText();
		}
		
		Paint GetOrCreateBrush( Color color ) {
			int key = color.ToArgb();
			Paint brush;
			if( brushCache.TryGetValue( key, out brush ) )
				return brush;
			
			brush = new Paint();
			brush.AntiAlias = true;
			brush.Color = color;
			brush.FilterBitmap = true;
			brush.SetStyle( Paint.Style.FillAndStroke );
			brushCache[key] = brush;
			return brush;
		}
	}
}
#endif