var CheckMatrix = require('./CheckMatrix'); 
var TransposeMatrix = require('./TransposeMatrix'); 
var RotateMatrix = function (matrix, direction){ 
if (direction === undefined) { 
direction = 90; 
} 
if (!CheckMatrix(matrix)) { 
return null ; 
} 
if (typeof direction !== 'string') { 
direction = ((direction % 360) + 360) % 360; 
} 
if (direction === 90 || direction === -270 || direction === 'rotateLeft') { 
matrix = TransposeMatrix(matrix); 
matrix = matrix.reverse(); 
} 
 else if (direction === -90 || direction === 270 || direction === 'rotateRight') { 
matrix = matrix.reverse(); 
matrix = TransposeMatrix(matrix); 
} 
 else if (Math.abs(direction) === 180 || direction === 'rotate180') { 
for (var i = 0; 
i < _AN_Read_length('length', matrix); i++ ){ 
matrix[i].reverse(); 
} 
matrix = matrix.reverse(); 
} 
return matrix; 
} 
; 
module.exports = RotateMatrix;