// soustavy.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <vector>
#include <windows.h>

static HANDLE s_console;

#define COLOR_TEXT          0b0111
#define COLOR_ZERO          0b1000
#define COLOR_PIVOT_OK      0b1010
#define COLOR_PIVOT_BAD     0b1100
#define COLOR_OTHER         0b1111
#define COLOR_BVEC          0b0111

void Color(WORD color) {
    SetConsoleTextAttribute(s_console, color);
}

class Matrix {
    size_t m_m;
    size_t m_n;
    std::vector<float> m_data;

public:
    Matrix(size_t m, size_t n) : m_m(m), m_n(n), m_data(m* n) {}
    float& At(size_t i, size_t j) { return m_data[i * m_n + j]; }
    void Print(const char* format) {
        size_t min_pivot = 0;
        for (size_t i = 0; i < m_m; ++i) {
            size_t pivot = 0;
            for (size_t j = 0; j < m_n; ++j) {
                auto val = At(i, j);
                WORD color = COLOR_OTHER;

                if (j == m_n - 1) {
                    color = COLOR_BVEC;
                }
                else if (std::abs(val) < 0.00001f) {
                    if (pivot == j) ++pivot;
                    color = COLOR_ZERO;

                }
                else if (pivot == j) {
                    color = pivot >= min_pivot ? COLOR_PIVOT_OK : COLOR_PIVOT_BAD;
                    min_pivot = pivot + 1;
                }

                if (j == m_n - 1) {
                    Color(COLOR_TEXT);
                    printf(" |");
                }

                Color(color);
                printf(format, val);
            }
            printf("\n");
        }
        Color(COLOR_TEXT);
    }

};

template <class T>
T Input(const char* prompt) {
    std::cout << prompt << " = ";
    T a;
    std::cin >> a;
    return a;
}

int main() {
    s_console = GetStdHandle(STD_OUTPUT_HANDLE);
    Color(COLOR_TEXT);

    auto m = Input<size_t>("m");
    auto n = Input<size_t>("n");

    std::vector<Matrix> history;

    {
        Matrix mat(m, n);

        for (size_t i = 0; i < m; ++i) {
            for (size_t j = 0; j < n; ++j) {
                //mat.At(i, j) = 0.0f;
                std::cin >> mat.At(i, j);
            }
        }

        history.push_back(mat);
    }


    printf("\nupravy:\n   s <i1> <i2> ....... prohodit radky i1 a i2\n   m <i> <k> ......... vynasobit radek i konstantou k\n   a <k> <i1> <i2> ... pricist k-nasobek i1 k i2\n   f <format> ........ zmenit format vystupu\n   u ................. undo\n");

    std::string fmt("%4.0f");
    while (true) {
        history.push_back(history.back());
        auto& mat = history.back();

        printf("\n");
        mat.Print(fmt.c_str());
        printf("\n? ");

        char op;
        size_t i1, i2;
        float k, temp;


        std::cin >> op;
        switch (op) {
        case 's': {
            std::cin >> i1 >> i2;
            --i1; --i2;
            for (size_t j = 0; j < n; ++j) {
                temp = mat.At(i1, j);
                mat.At(i1, j) = mat.At(i2, j);
                mat.At(i2, j) = temp;
            }
            break;
        }
        case 'm': {
            std::cin >> i1 >> k;
            --i1;
            for (size_t j = 0; j < n; ++j)
                mat.At(i1, j) *= k;
            break;
        }
        case 'a': {
            std::cin >> k >> i1 >> i2;
            --i1; --i2;
            for (size_t j = 0; j < n; ++j)
                mat.At(i2, j) += mat.At(i1, j) * k;
            break;
        }
        case 'f':
            std::cin >> fmt;
            break;

        case 'u':
            if (history.size() > 2) {
                history.pop_back();
                history.pop_back();
            }
            break;

        default:
            break;
        }


    }




    //printf("m(%u) n(%u)\n", m, n);



    std::cout << "Hello World!\n";
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file