#define _win32_winnt 0x500
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <conio.h>
#include <windows.h>
using namespace std;
int menu();
void drawGraph();
void drawImage();

HANDLE hStdOut;
HWND hwnd;
HDC hdc;
POINT pointTop;
POINT pointBottom;
POINT pointLeft;
POINT pointRight;


int main()
{
    SetConsoleTitleA("Lab Graphics");
    HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleTextAttribute(hStdOut, BACKGROUND_BLUE | FOREGROUND_RED);
    system("CLS");

    int answer = menu();
    switch (answer)
    {
    case 0: drawImage(); break;
    case 1: cout << "2" << endl; break;
    case 2: cout << "3" << endl; break;
    case 3: cout << "4" << endl; return 0;
    }
    system("pause");
    return 0;
}

int menu() {
    int key = 0;
    int code;

    do {
        system("cls");
        key = (key + 4) % 4;
        if (key == 0)
        {
            HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
            SetConsoleTextAttribute(hStdOut, 228);
            cout << "-> Draw a picture" << endl;
        }
        else
        {
            HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
            SetConsoleTextAttribute(hStdOut, 28);
            cout << "   Draw a picture" << endl;
        }

        if (key == 1)
        {
            HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
            SetConsoleTextAttribute(hStdOut, 228);
            cout << "-> Draw a graph" << endl;
        }
        else
        {
            HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
            SetConsoleTextAttribute(hStdOut, 28);
            cout << "   Draw a graph" << endl;
        }

        if (key == 2)
        {
            HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
            SetConsoleTextAttribute(hStdOut, 228);
            cout << "-> Draw a picture step-by-step" << endl;
        }
        else
        {
            HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
            SetConsoleTextAttribute(hStdOut, 28);
            cout << "   Draw a picture step-by-step" << endl;
        }

        if (key == 3)
        {
            HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
            SetConsoleTextAttribute(hStdOut, 228);
            cout << "-> Exit" << endl;
        }
        else
        {
            HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
            SetConsoleTextAttribute(hStdOut, 28);
            cout << "   Exit" << endl;
        }

        code = _getch();
        if (code == 80) key++;
        if (code == 72) key--;

    } while (code != 13);

    system("cls");
    return key;
}

void drawImage() {
    pointTop.x = 500;
    pointTop.y = 35;
    pointRight.x = 580;
    pointRight.y = 315;
    pointBottom.x = 500;
    pointBottom.y = 570;
    pointLeft.x = 420;
    pointLeft.y = 315;

    POINT *rhomb = new POINT[4];
    rhomb[0] = pointTop;
    rhomb[1] = pointRight;
    rhomb[2] = pointBottom;
    rhomb[3] = pointLeft;

    HWND hwnd = GetConsoleWindow();
    HDC hdc = GetDC(hwnd); //получаем DC(контекст устройства) для рисования
    HPEN hpen1; //объявляем объект перо
    HGDIOBJ hpenOld, hbrushOld;
    HBRUSH hbrush; //объявляем кисть

    hpen1 = CreatePen(PS_SOLID, 2, RGB(0, 0, 255)); //логическое перо с заданным стилем, шириной и цветом
    hpenOld = (HPEN)SelectObject(hdc, hpen1);

    MoveToEx(hdc, 500, 15, NULL);//устанавливает текущей позицией указанную точку
    LineTo(hdc, 590, 315);
    LineTo(hdc, 500, 585);
    LineTo(hdc, 410, 315);
    LineTo(hdc, 500, 15);

    hpen1 = CreatePen(PS_SOLID, 7, RGB(255, 255, 255)); //логическое перо с заданным стилем, шириной и цветом
    hpenOld = (HPEN)SelectObject(hdc, hpen1);

    hbrush = CreateSolidBrush(RGB(0, 0, 255));
    hbrushOld = (HBRUSH)SelectObject(hdc, hbrush);
    Polygon(hdc, rhomb, 4);

    MoveToEx(hdc, 495, 240, NULL);
    hpen1 = CreatePen(PS_SOLID, 8, RGB(255, 255, 255)); //логическое перо с заданным стилем, шириной и цветом
    hpenOld = (HPEN)SelectObject(hdc, hpen1);
    LineTo(hdc, 495, 345);//вертикальная вниз

    LineTo(hdc, 482, 355);//петля(влево вниз)
    LineTo(hdc, 470, 345);//петля(влево вверх)
    LineTo(hdc, 482, 335);//петля(вправо вверх)
    LineTo(hdc, 508, 355);//петля(вправо вниз)

    LineTo(hdc, 515, 355);
    LineTo(hdc, 523, 352);//ду спра
    LineTo(hdc, 541, 335);//га ва

    LineTo(hdc, 547, 325);
    LineTo(hdc, 549, 315);
    LineTo(hdc, 550, 290);//pryamaya na duge
    LineTo(hdc, 550, 276);
    LineTo(hdc, 536, 255);//вертикальная вверх

    LineTo(hdc, 525, 245);//дуга
    LineTo(hdc, 510, 239);//вверху

    LineTo(hdc, 480, 242);//горизонтальная влево

    LineTo(hdc, 471, 253);//конечная дуга
    LineTo(hdc, 464, 267);//справа налево
    LineTo(hdc, 464, 275);

    DeleteObject(hpen1);
    getchar();

}

void strelka(double x, double y, double size, bool scale)
{
    if (scale == 0) {
        MoveToEx(hdc, x, y + size, NULL);
        LineTo(hdc, x, y - size);
        LineTo(hdc, x + size, y);
        LineTo(hdc, x, y + size);
    }
    else {
        MoveToEx(hdc, x - size, y, NULL);
        LineTo(hdc, x, y - size);
        LineTo(hdc, x + size, y);
        LineTo(hdc, x - size, y);
    }
}


WORD colorConvertTo(int ForgC, int BackC)
{
    return ((BackC & 0x0F) << 4) + (ForgC & 0x0F);
}
WORD workWindowAttributes = colorConvertTo(15, 9); //158

void drawGraph() {
    double x, y;
    HDC dc = GetDC(hwnd);
    RECT clientRect; // координаты прямоугольника
    GetClientRect(hwnd, &clientRect);

    HPEN Pen = CreatePen(PS_SOLID, 3, RGB(255, 0, 0));
    HPEN PenCross = CreatePen(PS_SOLID, 3, RGB(255, 255, 255));
    SelectObject(hdc, Pen);
    int xScale = 50, yScale = 50;
    double sizeW = 900;
    double sizeH = 600;
    char *number = new char[15];
    double sizeStrelka = 6;
    SelectObject(hdc, PenCross);
    MoveToEx(hdc, 30, sizeH / 2, NULL);
    LineTo(hdc, sizeW - 30, sizeH / 2);
    strelka(sizeW - 30, sizeH / 2, 5, 0);
    MoveToEx(hdc, sizeW / 2, 40, NULL);
    LineTo(hdc, sizeW / 2, sizeH);
    strelka(sizeW / 2, 40, 5, 1);
    int xO = sizeW / 2, yO = sizeH / 2;
    //metki
    HDC THDC = GetDC(GetConsoleWindow());
    SetBkMode(THDC, TRANSPARENT);
    SetTextColor(THDC, RGB(255, 255, 255));
    SetConsoleTextAttribute(hStdOut, workWindowAttributes);
    strcpy(number, "X");
    TextOut(THDC, sizeW - 10, sizeH / 2, number, strlen(number));
    strcpy(number, "Y");
    TextOut(THDC, sizeW / 2 + 10, 20, number, strlen(number));
    strcpy(number, "y=e^x");
    TextOut(THDC, sizeW / 2 + 60, 20, number, strlen(number));
    for (int i = 50; i <= sizeH; i += yScale)
    {
        MoveToEx(hdc, sizeW / 2 - 10, i, NULL);
        LineTo(hdc, sizeW / 2 + 10, i);
        _itoa(-(i / 50) + 6, number, 10);
        TextOut(THDC, sizeW / 2 + 15, i, number, strlen(number));
    }
    for (int i = 50; i <= sizeW - 30; i += xScale)
    {
        MoveToEx(hdc, i, sizeH / 2 - 10, NULL);
        LineTo(hdc, i, sizeH / 2 + 10);
        _itoa((i / 50) - 9, number, 10);
        TextOut(THDC, i + 5, sizeH / 2 - 25, number, strlen(number));
    }

    SelectObject(hdc, Pen);
    float xBeg = -9, xEnd = 1.6;
    while ((exp(xBeg))*yScale + yO <= 40)
    {
        xBeg += 0.01;
    }
    MoveToEx(hdc, xO + xScale * xBeg, yO + yScale * -exp(xBeg), NULL);

    for (x = xBeg; x <= xEnd; x += 0.01)
    {
        LineTo(hdc, xO + xScale * x, yO + yScale * -exp(x));

    }
    DeleteObject(Pen);
    DeleteObject(PenCross);
}