using UnityEngine;
using UnityEditor;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;

namespace BFEditor.Resource
{
	// 创建bmfont
	public class CreateFontEditor : Editor
	{
	    [MenuItem("Assets/BF Tools/BMFont/CreateBMFontSettings", false, 1)]
	    static void CreateFont()
	    {
	        Object obj = Selection.activeObject;
	        string fntPath = AssetDatabase.GetAssetPath(obj);
	        if (fntPath.IndexOf(".fnt") == -1) {
	            // 不是字体文件
	            return;
	        }

	        string customFontPath = fntPath.Replace(".fnt", ".fontsettings");
	        Font customFont = null;
	        if (!File.Exists(customFontPath)) {
	            customFont = new Font();
	            AssetDatabase.CreateAsset(customFont, customFontPath);
	            AssetDatabase.SaveAssets();
	        }else{
	            customFont = AssetDatabase.LoadAssetAtPath<Font>(customFontPath);
	        }

	        StreamReader reader = new StreamReader(new FileStream(fntPath, FileMode.Open));

	        List<CharacterInfo> charList = new List<CharacterInfo>();
	        Regex reg = new Regex(@"char id=(?<id>\d+)\s+x=(?<x>\d+)\s+y=(?<y>\d+)\s+width=(?<width>\d+)\s+height=(?<height>\d+)\s+xoffset=(?<xoffset>\d+)\s+yoffset=(?<yoffset>\d+)\s+xadvance=(?<xadvance>\d+)\s+");
	        string line = reader.ReadLine();
	        int lineHeight = 0;
	        int texWidth = 1;
	        int texHeight = 1;

	        while (line != null) {
	            line = line.Replace("\"", "");
	            if (line.IndexOf("char id=") != -1) {
	                Match match = reg.Match(line);
	                if (match != Match.Empty) {
	                    var id = System.Convert.ToInt32(match.Groups["id"].Value);
	                    var x = System.Convert.ToInt32(match.Groups["x"].Value);
	                    var y = System.Convert.ToInt32(match.Groups["y"].Value);
	                    var width = System.Convert.ToInt32(match.Groups["width"].Value);
	                    var height = System.Convert.ToInt32(match.Groups["height"].Value);
	                    var xoffset = System.Convert.ToInt32(match.Groups["xoffset"].Value);
	                    var yoffset = System.Convert.ToInt32(match.Groups["yoffset"].Value);
	                    var xadvance = System.Convert.ToInt32(match.Groups["xadvance"].Value);
	                    CharacterInfo info = new CharacterInfo();
	                    info.index = id;

	                    float uvx = 1.0f*x/texWidth;
	                    float uvy = 1.0f - (1.0f*(y + height)/texHeight);
	                    float uvw = 1.0f*width/texWidth;
	                    float uvh = 1.0f*height/texHeight;

	                    info.uvBottomLeft = new Vector2(uvx, uvy);
	                    info.uvBottomRight = new Vector2(uvx + uvw, uvy);
	                    info.uvTopLeft = new Vector2(uvx, uvy + uvh);
	                    info.uvTopRight = new Vector2(uvx + uvw, uvy + uvh);

	                    info.minX = 0;
	                    info.maxX = (int)width;
	                    info.minY = -(int)height / 2;
	                    info.maxY = (int)height / 2;
	                    info.advance = (int)xadvance;

	                    charList.Add(info);
	                }
	            } else if (line.IndexOf("scaleW=") != -1) {
	                Regex reg2 = new Regex(@"common lineHeight=(?<lineHeight>\d+)\s+.*scaleW=(?<scaleW>\d+)\s+scaleH=(?<scaleH>\d+)");
	                Match match = reg2.Match(line);
	                if (match != Match.Empty) {
	                    lineHeight = System.Convert.ToInt32(match.Groups["lineHeight"].Value);
	                    texWidth = System.Convert.ToInt32(match.Groups["scaleW"].Value);
	                    texHeight = System.Convert.ToInt32(match.Groups["scaleH"].Value);
	                }
	            }
	            line = reader.ReadLine();
	        }

	        customFont.characterInfo = charList.ToArray();

	        string materialFilename = fntPath.Replace(".fnt", ".mat");
	        string textureFilename = fntPath.Replace(".fnt", ".png");

	        if (File.Exists(materialFilename)) {
	            Material mat = AssetDatabase.LoadAssetAtPath(materialFilename, typeof(Material)) as Material;
	            Shader shader = Shader.Find("UI/Default Font");
	            mat.shader = shader;
	            Texture tex = AssetDatabase.LoadAssetAtPath(textureFilename, typeof(Texture)) as Texture;
	            mat.SetTexture("_MainTex", tex);
	            EditorUtility.SetDirty(mat);
	            customFont.material = mat;
	        }else{
	            Material mat = null;
	            {
	                Shader shader = Shader.Find("UI/Default Font");
	                mat = new Material(shader);
	                Texture tex = AssetDatabase.LoadAssetAtPath(textureFilename, typeof(Texture)) as Texture;
	                mat.SetTexture("_MainTex", tex);

	                AssetDatabase.CreateAsset(mat, fntPath.Replace(".fnt", ".mat"));
	                AssetDatabase.SaveAssets();
	                AssetDatabase.Refresh();
	            }
	            customFont.material = mat;
	        }
	        EditorUtility.SetDirty(customFont);
	        AssetDatabase.SaveAssets();
	        AssetDatabase.Refresh();
	        Debug.Log("CreateFont Success");
	    }
	}
}