using Chernobyl.Collections.Generic.Event;
using Chernobyl.Dependency;
using Chernobyl.Graphics;
using Chernobyl.Graphics.Drawing;
using Chernobyl.Graphics.Texture;
using Chernobyl.Graphics.Writing;
using Chernobyl.Interface.Writing;
using Chernobyl.Mathematics.Movement;

namespace Chernobyl.Interface
{
    /// <summary>
    /// A 2D box that contains characters that can be edited.
    /// </summary>
    public class EditBox : Sprite
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="EditBox"/> class that 
        /// uses a default background.
        /// </summary>
        /// <param name="services">The services instance that takes and receives
        /// services.</param>
        public EditBox(IEventCollection<object> services) : this(services, null)
        { }

        /// <summary>
        /// Initializes a new instance of the <see cref="EditBox"/> class.
        /// </summary>
        /// <param name="services">The services instance that takes and receives
        /// services.</param>
        /// <param name="background">The texture to apply to the background of 
        /// the edit box or null if a default background should be used.</param>
        public EditBox(IEventCollection<object> services, ITexture background)
            : base(services, background ?? new Texture2D(services, ColorRgba.White))
        {
            ScaleX(100.0f);
            ScaleY(25.0f);

            Text = new Text(services);
            Transform.MakeParentChild(NoScaleTransform, Text);
            TextCursor textCursor = new TextCursor(services, Text);
            TextConstraint textConstraint = new TextConstraint(services, this, Text);
            TextEditor textEditor = new TextEditor(services, Text);

            // give the edit box some default borders
            Borders = new Borders(services);

            services.Inject<EditBox>(this);
        }

        /// <summary>
        /// The <see cref="IText"/> instance used to display text on this EditBox.
        /// </summary>
        public IText Text { get; private set; }

        /// <summary>
        /// The borders on this <see cref="EditBox"/>. By default, this button 
        /// is given borders along all it's edges. Note: you do not need to 
        /// parent this Button with the new Border or un-parent the old border; 
        /// this property will do that for you.
        /// </summary>
        public Borders Borders
        {
            get { return _borders; }
            set
            {
                if (_borders != null)
                    Transform.SeperateParentChild(this, _borders);

                _borders = value;
                Transform.MakeParentChild(this, _borders);
            }
        }

        /// <summary>
        /// The <see cref="Scene"/> that the text should be rendered in.
        /// </summary>
        [Inject]
        public Scene Scene
        {
            set 
            {
                Text.DrawableParent = value.Draw3D;
            }
        }

        /// <summary>
        /// The backing field to <see cref="Borders"/>.
        /// </summary>
        Borders _borders;
    }
}