package com.lz.mysql;

import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class ControlScanner {
    private String filePath;//文件地址
    static final String[] notesSym = {"/*", "*/", "//", "\\n"};//注释符号，成对出现，偶数为起始符号，奇数为结束符号
    private String packageName;//包名
    private String name;//类名
    List<String> importList = new ArrayList<>();//引入的包名
    List<FunctionDes> functionDesList = new ArrayList<>();//方法对象集合
    List<AttributeDes> attributeDesList = new ArrayList<>();//属性对象集合

    public void startScanner(String filePath){
        File file = new File(filePath);
        if(file.exists()){
            //
            try {
                BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
                String strLine = null;
                int lineCount = 0;
                while(null != (strLine = bufferedReader.readLine())){
                    strLine = pretreatment(strLine);
                    CheckType checkType = checkLineStart(strLine);
                    strLine = strLine.substring(checkType.getStart());
                    checkLineEnd(checkType, strLine);

                }
            } catch (FileNotFoundException e) {
                e.printStackTrace();
                //文件异常
            } catch (IOException e) {
                e.printStackTrace();
                //读取文件失败
            }
        }

    }

    private String pretreatment(String strLine){
        strLine = strLine.replace("\t", " ");
        strLine = removeMoreSpace(strLine);
        strLine = strLine.replace("\r\n", "\n");

        return strLine;
    }

    private String removeMoreSpace(String strLine){
        int start = 0;
        while(strLine.charAt(start) == ' '){
            start++;
        }
        if(start > 0){
            strLine = strLine.substring(start);
        }
        String newLine;
        return strLine;
    }

    private CheckType checkLineStart(String strLine){
        CheckType checkType = new CheckType();

        switch (strLine.charAt(0)){
            case '/':// /* //
                if(strLine.charAt(1) == '/'){
                    checkType.setType(0);
                    //checkType.setEnd(true);
                }else if(strLine.charAt(1) == '*'){
                    checkType.setType(1);
                    /*if(strLine.length() > 3 &&
                            strLine.charAt(strLine.length() - 1) == '/' &&
                            strLine.charAt(strLine.length() - 2) == '*'){
                        checkType.setEnd(true);
                    }*/
                }
                checkType.setStart(2);
                break;
            case 'i'://import
                if(strLine.startsWith("import ")){

                    checkType.setType(2);
                    checkType.setStart(7);
                }
                break;
            case 'p':// public private proteced package
                if(strLine.startsWith("public ")){
                    checkType.setType(3);
                    checkType.setStart(7);

                }else if(strLine.startsWith("private ")){
                    checkType.setType(4);
                    checkType.setStart(8);
                }else if(strLine.startsWith("proteced ")){
                    checkType.setType(5);
                    checkType.setStart(9);
                }else if(strLine.startsWith("package ")){
                    checkType.setType(6);
                    checkType.setStart(8);
                }
                break;
            default:
                checkType.setType(50);
                checkType.setStart(0);
                break;
        }
        /*if((type == 0 || type > 2)
                && strLine.charAt(strLine.length() - 1) == ';'){
            checkType.setEnd(true);
        }*/
        return checkType;
    }

    private CheckType checkLineEnd(CheckType checkType, String strLine){
        if(checkType.getType() > 1){//处理非注释代码中的多余的空格替换成一个，引号内的不处理

        }
        return checkType;
    }

    public class CheckType{
        //1：// 2：/* 3：import 4：public 5：private 6：proteced 7：package 50：未找到关键字
        private int type;

        private int start;

        private boolean isEnd;//一行代码是否读取完毕

        public int getType() {
            return type;
        }

        public void setType(int type) {
            this.type = type;
        }

        public int getStart() {
            return start;
        }

        public void setStart(int start) {
            this.start = start;
        }

        public boolean isEnd() {
            return isEnd;
        }

        public void setEnd(boolean end) {
            isEnd = end;
        }
    }

}