#include "Point.h"

#include <list>
#include <cstdlib>  // for srand, rand

class NumberGenerator
{
public:
    static std::list<Point> get_random_numbers(int valCount)
    {
        std::list<Point> points;

        //srand(static_cast <unsigned> (time(0)));
        srand(static_cast <unsigned> (0)); // fixed seed for testing

        float x = 0;
        float y = 0;
        for (int i = 0; i < valCount; ++i)
        {
            x = OFFSET + static_cast <float> (rand()) / (static_cast <float> (RAND_MAX / (WIDTH - 2*OFFSET)));
            y = OFFSET + static_cast <float> (rand()) / (static_cast <float> (RAND_MAX / (HEIGHT - 2*OFFSET)));

            points.push_back(Point(x, y));
        }

        return points;
    }

    static std::list<Point> get_rectangle_numbers(int valCount)
    {
        std::list<Point> points;

        float diff = (2.f * HEIGHT/valCount);

        float x = 0;
        float y = 0;
        for (int i = 0; i < valCount; ++i)
        {
            x = (i%2 == 0) ? OFFSET : WIDTH - OFFSET;
            y = diff/2 + (i/2) * diff;

            points.push_back(Point(x, y));
        }

        return points;
    }

    static std::list<Point> get_circle_numbers(int valCount)
    {
        std::list<Point> points;

        float rad = HEIGHT/2;
        float deg = (float)(2 * 3.14159 / valCount);

        float x = 0;
        float y = 0;
        for (int i = 0; i < valCount; ++i)
        {
            x = WIDTH/2 + rad * cosf(i * deg);
            y = HEIGHT/2 + rad * sinf(i * deg);

            points.push_back(Point(x, y));
        }

        return points;
    }
};