using System.Text;
using TyphoonGUIStyle;
using UnityEditor;
using UnityEngine;

namespace TyphoonFontTool
{
    [CustomEditor(typeof(FontSourceData))]
    public class FontSourceDataInspector : Editor
    {
        public GUIStyle _characterStyle = null;

        public GUIStyle CharacterStyle
        {
            get
            {
                if (_characterStyle == null)
                {
                    _characterStyle = new GUIStyle(GUI.skin.textArea);
                }

                return _characterStyle;
            }
        }

        private FontSourceData Target => target as FontSourceData;
        private Vector2 _scroll;
        private string _characterString = null;

        private string CharacterString
        {
            get
            {
                if (_characterString == null)
                {
                    var sb = new StringBuilder();
                    var codes = Target.Codes;
                    foreach (var code in codes)
                    {
                        var str = char.ConvertFromUtf32(code);
                        sb.Append(str);
                    }

                    _characterString = sb.ToString();
                }

                return _characterString;
            }
        }

        public override void OnInspectorGUI()
        {
            base.OnInspectorGUI();
            GUILayout.Label("预览字符:", Styles.BoldLabel, GUILayout.Height(24));
            var last = GUILayoutUtility.GetLastRect();
            var btnRect = last;
            btnRect.width = 60;
            btnRect.x = last.xMax - btnRect.width;
            btnRect.x -= 8;
            var center = btnRect.center;
            var draw = btnRect;
            draw.height -= 8;
            draw.center = center;
            if (GUI.Button(draw, "刷新"))
            {
                _characterString = null;
            }

            if (Target.Font != null)
            {
                GUILayout.TextArea(CharacterString, CharacterStyle);
            }
        }
    }
}