#include "points.h"
#include <iostream>

Points::Points() {
    size = 0;
    capacity = 1;
    array = new point[capacity];
}

Points::Points(int rows, int cols): size(0), capacity(4)  {
    array = new point[capacity];
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            if((i%2==0 && j%2!=0) || (i%2!=0 && j%2==0)) {
                point temp;
                temp.x = i;
                temp.y = j;
                push(temp);
            }
        }
    }
}

Points::~Points() {
    delete[] array;
}

int Points::getSize() {
    return size;
}

int Points::getCapacity() {
    return capacity;
}
void Points::push(point val) {
    if (size == capacity) {
       growArray();
    }
    array[size] = val;
    size++;
    }
void Points::removeVal(point val) {
    for (int i = 0; i < size; i++) {
        if (array[i].x==val.x && array[i].y==val.y) {
            if (i==size-1) {
                array[size-1].x = -1;
                array[size-1].y = -1;
                size--;
            } else {
                array[i] = array[i+1];
            }
        }
    }
    if (size == capacity/2) {
        shrinkArray();
    }
}

void Points::removeIndex(int index) {
    for (int i = index; i < size; i++) {
        if (i==size-1) {
            array[size-1].x = -1;
            array[size-1].x = -1;
        } else {
            array[i] = array[i+1];
        }
    }
    size--;
    if (size == capacity/2) {
        shrinkArray();
    }
}

void Points::growArray() {
    capacity = capacity * 2;
    point* temp = new point[capacity];
    for (int i = 0; i < size; i++) {
        temp[i] = array[i];
    }
    delete[] array;
    array = temp;

}

void Points::shrinkArray() {
    capacity = capacity / 2;
    point* temp = new point[capacity];
    for (int i = 0; i < size; i++) {
        temp[i] = array[i];
    }
    delete[] array;
    array = temp;

}

void Points::printArray() {
    for (int i=0;i<size;i++) {
        std::cout << array[i].x << " " << array[i].y << std::endl;
    }
}