#include <vector>
#include "histogram.h"
using namespace std;

bool
find_minmax(const std::vector<double>& numbers, double& min, double& max){
    if (numbers.size() != 0) {
        min = numbers[0];
        max = numbers[0];

        for (double x : numbers) {
            if (x < min) {
                min = x;
            }
            else if (x > max) {
                max = x;
            }
        }
        return true;
    }

    else {
        return false;
    }

}


vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count)
{
    double min,max;
    find_minmax(numbers, min, max);
    vector<size_t> bins(bin_count);
    double bin_size = (max-min)/bin_count;
    for (size_t i = 0; i < numbers.size(); i++) {
        bool found = false;
        for (size_t j = 0; (j < bin_count - 1) && !found; j++) {
            auto lo = min + j * bin_size;
            auto hi = min + (j + 1) * bin_size;
            if ( (numbers[i] >= lo) && (numbers[i] < hi) ) {
                bins[j]++;
                found = true;
            }
        }
        if (!found) {
            bins[bin_count-1]++;
        }

    }
    return bins;
}