using UnityEngine;
#if UNITY_6000_3_OR_NEWER
using System;
#endif

namespace Module.NavigationTool.Editor.Toolbar
{
#if UNITY_6000_3_OR_NEWER
    [Obsolete("Unity has added a new API for adding elements to the main toolbar. Check: <url=https://docs.unity3d.com/6000.3/Documentation/ScriptReference/Toolbars.MainToolbarElement.html>MainToolbarElement</url>.")]
#endif
    public abstract class AbstractToolbarDrawer
    {
        public abstract bool Visible { get; }
        public abstract bool Enabled { get; }
        public abstract EToolbarPlacement Placement { get; }
        public abstract int Priority { get; }
        
        protected Styles styles;
        
#if !UNITY_6000_3_OR_NEWER
        private Rect rect;
        
        public void Setup(Rect rect)
        {
            this.rect = rect;
        }
#endif

        public virtual void Update()
        {
        }

#if !UNITY_6000_3_OR_NEWER
        public void OnGUI()
        {
            if (styles == null)
                styles = new Styles();
            
            styles.Initialize(GUI.skin);
            
            GUI.enabled = Enabled;
            Draw(rect);
            GUI.enabled = true;
        }
#endif

        protected abstract void Draw(Rect rect);
        public abstract float CalculateWidth();
    }
}