package com.wgtgt;

import java.util.ArrayList;

import qq.q757225051.utils.FileUtils;
import qq.q757225051.utils.StringUtils;

public class CodeReader {
	private String className=null;
	private String fanxing=null;
	private ArrayList<Method>methodList=new ArrayList<Method>();

	public void parse(String fileName) {
		char[]chs=FileUtils.readToChars(fileName);
		boolean clazzInter=false;
		for (int i = 0; i < chs.length; i++) {
			if(!clazzInter){
				if(isClass(chs,i)){
					int k=i+6;
					int size=0;
					while(chs[k++]!='{'){
						if(size++>50){
							throw new RuntimeException("--类名过长--");
						}
					}
					String calssFullName=new String(substring(chs,i+6,k-1));
					calssFullName=calssFullName.trim();
					int index=calssFullName.indexOf('<');
					if(index==-1){
						className=calssFullName;//
					}else{
						className=StringUtils.getLeftFromLeft(calssFullName, "<");
						fanxing=StringUtils.getMid(calssFullName, "<", ">");
					}
					i=k-1;
					clazzInter=true;
				}
			}else{
				if(Character.isJavaIdentifierStart(chs[i])){
					int k=1;
					int m=0;
					if(Character.isWhitespace(chs[i-1])||chs[i-1]==']'||chs[i-1]=='>'){//是空白
						while(Character.isJavaIdentifierPart(chs[i+k++])){

						}
						k--;
						m=k;
						while(Character.isWhitespace(chs[i+k++])){
							
						}
						k--;
						int left=-1;
						int right=-1;
						if(chs[i+k]=='('){
							left=k;
							while(chs[i+ ++k]!=')'){
								
							}
							right=k;
							String methodName=substring(chs,i,i+m);
							String returnType=getFisrtWord(chs,i);
							String paramListFullName=substring(chs,i+left+1,i+right+1-1);
							if("".equals(returnType)||"new".equals(returnType)||"return".equals(returnType)){

							}else{
								MethodUtil.add(methodList,methodName,returnType,paramListFullName);
							}
						}
					}
				}
			}
			
		}
	}
	private static String getFisrtWord(char[] chs, int i) {
		boolean isFirstWhitespace=true;
		StringBuilder sb = new StringBuilder();
		while(i>0&&(Character.isJavaIdentifierPart(chs[--i])||Character.isWhitespace(chs[i])||chs[i]==']'||chs[i]=='['||chs[i]=='<'||chs[i]=='>')){
			if(Character.isWhitespace(chs[i])){
				if(isFirstWhitespace){
					continue;
				}else{
					break;
				}
			}else{
				sb.insert(0,chs[i]);
				isFirstWhitespace=false;
			}
		}
		String result=sb.toString().trim();
		if(result.length()>0){
			if(Character.isJavaIdentifierStart(result.charAt(0))){
				return result;
			}
		}
		return "";
	}

	private static String substring(char[] chs, int start, int end) {
		StringBuilder sb = new StringBuilder();
		for (int i = start; i < end; i++) {
			sb.append(chs[i]);
		}
		
		return sb.toString();
	}
//	private static String substring(char[] chs, int start, int end) {
//		StringBuilder sb = new StringBuilder();
//		for (int i = start; i < (end<chs.length?end:chs.length); i++) {
//			sb.append(chs[i]);
//		}
//		
//		return sb.toString();
//	}
	private static boolean isClass(char[] chs, int i) {//不能是点
		if(i>chs.length-6){
			return false;
		}
		if(chs[i]=='c'&&chs[i+1]=='l'&&chs[i+2]=='a'&&chs[i+3]=='s'&&chs[i+4]=='s'&&chs[i+5]==' '){
			return true;
		}
		return false;
	}

	public String getClassName() {
		return className;
	}

	public void setClassName(String className) {
		this.className = className;
	}

	public String getFanxing() {
		return fanxing;
	}

	public void setFanxing(String fanxing) {
		this.fanxing = fanxing;
	}

	public ArrayList<Method> getMethodList() {
		return methodList;
	}

	public void setMethodList(ArrayList<Method> methodList) {
		this.methodList = methodList;
	}

}