using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace Subsurface
{
    class GUIImage : GUIComponent
    {
        Sprite sprite;

        Rectangle sourceRect;

        bool crop;
        
        public bool Crop
        {
            get
            { 
                return crop;
            }
            set
            {
                crop = value;
                if (crop)
                {                                
                    sourceRect.Width = Math.Min(sprite.SourceRect.Width, Rect.Width);
                    sourceRect.Height = Math.Min(sprite.SourceRect.Height, Rect.Height);
                }
            }
        }

        public float Scale
        {
            get;
            set;
        }

        public Rectangle SourceRect
        {
            get { return sourceRect; }
            set { sourceRect = value; }
        }

        public GUIImage(Rectangle rect, string spritePath, Alignment alignment, GUIComponent parent = null)
            : this(rect, new Sprite(spritePath, Vector2.Zero), alignment, parent)
        {
        }

        public GUIImage(Rectangle rect, Sprite sprite, Alignment alignment, GUIComponent parent = null)
        {
            this.rect = rect;

            this.alignment = alignment;

            color = Color.White;

            alpha = 1.0f;

            Scale = 1.0f;

            this.sprite = sprite;
            
            if (rect.Width == 0) this.rect.Width = (int)sprite.size.X;
            if (rect.Height == 0) this.rect.Height = (int)Math.Min(sprite.size.Y, sprite.size.Y * (this.rect.Width / sprite.size.X));

            sourceRect = sprite.SourceRect;
            
            if (parent != null)
                parent.AddChild(this);
        }

        public override void Draw(SpriteBatch spriteBatch)
        {
            Color currColor = color;
            if (state == ComponentState.Hover) currColor = hoverColor;
            if (state == ComponentState.Selected) currColor = selectedColor;

            spriteBatch.Draw(sprite.Texture, new Vector2(rect.X, rect.Y), sourceRect, currColor * alpha, 0.0f, Vector2.Zero,
                Scale, SpriteEffects.None, 0.0f);            
            
            DrawChildren(spriteBatch);
        }
    }
}