using UnityEngine;

namespace GamecraftModdingAPI.Interface.IMGUI
{
    /// <summary>
    /// An image.
    /// This wraps Unity's IMGUI Label.
    /// </summary>
    public class Image : UIElement
    {
        private bool automaticLayout = false;
        
        /// <summary>
        /// The image texture to display
        /// </summary>
        public Texture Texture { get; set; }
        
        /// <summary>
        /// The rectangular area in the window that the image can use
        /// </summary>
        public Rect Box { get; set; } = Rect.zero;
        
        public void OnGUI()
        {
            //if (Texture == null) return;
            if (automaticLayout)
            {
                GUILayout.Label(Texture, Constants.Default.label);
            }
            else
            {
                GUI.Label(Box, Texture, Constants.Default.label);
            }
        }

        /// <summary>
        /// The image element's unique name.
        /// </summary>
        public string Name { get; }
        
        /// <summary>
        /// Whether to display the image and everything in it.
        /// </summary>
        public bool Enabled { set; get; } = true;
        
        /// <summary>
        /// Initializes a new instance of the <see cref="T:GamecraftModdingAPI.Interface.IMGUI.Image"/> class with automatic layout.
        /// </summary>
        /// <param name="texture">Image to display.</param>
        /// <param name="name">The element's name.</param>
        public Image(Texture texture = null, string name = null)
        {
            automaticLayout = true;
            Texture = texture;
            if (name == null)
            {
                if (texture == null)
                {
                    this.Name = typeof(Image).FullName + "::" + texture;
                }
                else
                {
                    this.Name = typeof(Image).FullName + "::" + texture.name + "(" + texture.width + "x" + texture.height + ")";
                }
                
            }
            else
            {
                this.Name = name;
            }
            IMGUIManager.AddElement(this);
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="T:GamecraftModdingAPI.Interface.IMGUI.Image"/> class.
        /// </summary>
        /// <param name="box">Rectangular area for the image.</param>
        /// <param name="texture">Image to display.</param>
        /// <param name="name">The element's name.</param>
        public Image(Rect box, Texture texture = null, string name = null) : this(texture, name)
        {
            this.Box = box;
            automaticLayout = false;
        }
    }
}