package com.changhong.epc.tenant;

import org.junit.Test;

import java.util.Arrays;

public class MasterTest {

    @Test
    public void test(){
        int[][] matrix = new int[][]{
                {1, 2, 3}
                , {4, 5, 6}
                , {7, 8, 9}
        };

        rotate(matrix);
        for(int[] o : matrix){
            System.out.println(Arrays.toString(o));
        }
    }

    public void rotate(int[][] matrix) {
        int layer = matrix.length / 2
                , index = 0;
        if(layer < 1){
            return;
        }
        do{
            turn(matrix, index++);
        }while (layer > index);
    }

    int x = 0
            , y = 0;
    int block=0;
    int length=0;

    public void turn(int[][] matrix, int layer){
        x = y = layer;
        block = 0;
        length = matrix.length-1;
        do{
            System.out.println(matrix[x][y]);
            next();
        }while (x != -1);
    }

    public void next(){
        switch (block){
            case 0:
                if(y == length){
                    block++;
                    next();
                    break;
                }
                y++;
                break;
            case 1:
                if(x == length){
                    block++;
                    next();
                    break;
                }
                x++;
                break;
            case 2:
                if(y == 0){
                    block++;
                    next();
                    break;
                }
                y--;
                break;
            case 3:
                if(x == 0){
                    x = y = -1;
                    break;
                }
                x--;
                break;
        }
    }

}