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var clone = require('matrix_deep_clone');

var stats = require('./Statistics.js');

var otherFunctions = function() {

function copy(data) {

return clone.deepCloneMatrix(data);

}

function generateRandomNumbers(dim, min = 0, max) {

/**

* Both the min and max values are included.

*/

function getRandomInt(min, max) {

return Math.floor(Math.random() * (max - min + 1) + min);

}

function innerGenerateRandomNumbers(totalElements) {

var newData = [];

for (var i = 0; i < totalElements; i++) {

newData[i] = getRandomInt(min, max);

}

return newData;

}

if (max == undefined) {

var sum = 1;

for (var i in dim) {

sum = dim[i] * sum;

}

max = sum + min;

}

var totalElements = 1;

for (var i = 0; i < dim.length; i++) {

totalElements = dim[i] * totalElements;

}

var newData = innerGenerateRandomNumbers(totalElements);

return reshape(newData, dim);

}

function get_Dimensions(data) {

/*checking for single error since it causes problem*/

if (typeof(data[0]) == 'number' && typeof(data) == 'object') {

var res = []

res[0] = 1;

res[1] = data.length;

return res;

}

function get_Dim(data, dim, i = 0) {

if (typeof(data) == "object") {

dim[i] = data.length;

get_Dim(data[0], dim, ++i);

} else if (typeof(data) == "number") {

return 1;

} else {

return undefined;

}

}

var dimen = [];

get_Dim(data, dimen);

return dimen;

}

function fillWithNumber(dim, number = 0) {

var rowsNumber = dim[dim.length - 2];

var colNumber = dim[dim.length - 1];

function create2DMatrix(rows, columns, to_fill = 0) {

var res = [];

function createArray(number, to_fill = 0) {

var temp = [];

for (var i = 0; i < number; i++) {

temp[i] = to_fill;

}

return temp;

}

for (var j = 0; j < rows; j++) {

res[j] = createArray(columns, to_fill);

}

return res;

}

if (dim.length == 2) {

return create2DMatrix(rowsNumber, colNumber, number);

} else {

// it is a higher dimension matrix

var res = [];

var subset = dim.slice(0, dim.length - 2);

for (var i = 0; i < subset.length; i++) {

var temp = [];

for (var j = 0; j < subset[subset.length - 1 - i]; j++) {

if (i == 0) {

temp[j] = create2DMatrix(rowsNumber, colNumber, number)

}

}

if (i == 0) {

res[i] = temp;

} else {

res[i] = clone.deepCloneMatrix(res[i - 1]);

}

}

if (res.length == 1) {

return res[0];

} else {

return res;

}

}

}

function flatten(data) {

function inner_flatten(data) {

if (typeof(data) == 'number') {

counter++;

newdata[counter] = data;

return;

} else {

for (var i in data) {

inner_flatten(data[i]);

}

return newdata;

}

}

var newdata = [];

var counter = -1;

inner_flatten(data);

return newdata;

}

function reshape(data, dim) {

function inner_reshape() {

var rowsNumber = dim[dim.length - 2];

var colNumber = dim[dim.length - 1];

function create2DMatrix(rows, columns, to_fill = 0) {

var res = [];

function createArray(number, to_fill = 0) {

var temp = [];

for (var i = 0; i < number; i++) {

temp[i] = to_fill_data[++counter];

}

return temp;

}

for (var j = 0; j < rows; j++) {

res[j] = createArray(columns, to_fill);

}

return res;

}

if (dim.length == 2) {

return create2DMatrix(rowsNumber, colNumber);

} else {

// it is a higher dimension matrix

var res = [];

var subset = dim.slice(0, dim.length - 2);

for (var i = 0; i < subset.length; i++) {

var temp = [];

for (var j = 0; j < subset[subset.length - 1 - i]; j++) {

if (i == 0) {

temp[j] = create2DMatrix(rowsNumber, colNumber)

}

}

if (i == 0) {

res[i] = temp;

} else {

res[i] = clone.deepCloneMatrix(res[i - 1]);

}

}

if (res.length == 1) {

return res[0];

} else {

return res;

}

}

}

function isDataValid() {

var elementsInDim = 1;

for (var v of dim) {

elementsInDim *= v;

}

var givenElements = stats.totalElements(data);

if (givenElements !== elementsInDim) {

// console.log("Wrong input please try again");

return false;

} else {

// console.log("correct input");

return true;

}

}

if (isDataValid()) {

var counter = -1;

to_fill_data = flatten(data);

return inner_reshape();

} else {

throw new Error("cannot reshape data incorrect dimension given ");

}

}

function negative(data) {

function inner_negative(to_change) {

if (typeof(to_change) == 'number') {

return -to_change;

} else {

for (i in to_change) {

to_change[i] = inner_negative(to_change[i]);

}

return to_change;

}

}

safety = clone.deepCloneMatrix(data);

return inner_negative(safety);

}

function abs(data) {

function inner_abs(to_change) {

if (typeof(to_change) == 'number') {

if (to_change < 0) {

return -to_change;

} else {

return to_change;

}

} else {

for (i in to_change) {

to_change[i] = inner_abs(to_change[i]);

}

return to_change;

}

}

safety = clone.deepCloneMatrix(data);

return inner_abs(safety);

}

return {

generateRandomNumbers: generateRandomNumbers,

get_Dimensions: get_Dimensions,

fillWithNumber: fillWithNumber,

flatten: flatten,

reshape: reshape,

negative: negative,

abs: abs,

copy: copy

}

}

module.exports = otherFunctions();