#include <windows.h>
#include <string>
#include <map>
using namespace std;

#define ID_DISPLAY 1

LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
CHAR szClassName[ ] = "CodeBlocksWindowsApp";

HWND hColor, hDisplay;
map<string, COLORREF> ColBase;
COLORREF BackroundCol = RGB(0,0,0);
RECT ObszarRysowany;

void FillBase(){
    ColBase["czerwony"] = RGB(255, 0, 0);
    ColBase["zielony"] = RGB(0, 255, 0);
    ColBase["niebieski"] = RGB(0, 0, 255);
    ColBase["bialy"] = RGB(255, 255, 255);
    ColBase["czarny"] = RGB(0, 0, 0);
}
COLORREF fGetCol(string tekst){
    map<string, COLORREF>::iterator cur;
    cur = ColBase.find(tekst);
    return cur->second;
}

int WINAPI WinMain (HINSTANCE hThisInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR lpszArgument,
                     int nCmdShow)
{
    HWND hwnd;
    MSG messages;
    WNDCLASSEX wincl;

    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;
    wincl.style = CS_DBLCLKS;
    wincl.cbSize = sizeof (WNDCLASSEX);
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;
    wincl.cbClsExtra = 0;
    wincl.cbWndExtra = 0;
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

    if (!RegisterClassEx (&wincl))
        return 0;

    FillBase();

    hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Pobieranie Koloru",       /* Title Text */
           WS_OVERLAPPEDWINDOW, /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           200,                 /* The programs width */
           100,                 /* and height in pixels */
           NULL,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );

    hColor = CreateWindowEx(WS_EX_CLIENTEDGE, "EDIT", "Podaj kolor...", WS_CHILD | WS_VISIBLE | ES_AUTOHSCROLL, 0, 0, 200, 23, hwnd, NULL, hThisInstance, NULL);
    hDisplay = CreateWindowEx(0, "BUTTON", "Wyswietl podany kolor", WS_CHILD | WS_VISIBLE, 0, 23, 200, 23, hwnd, (HMENU)ID_DISPLAY, hThisInstance, NULL);

    ObszarRysowany.left = 0;
    ObszarRysowany.right = 200;
    ObszarRysowany.top = 46;
    ObszarRysowany.bottom = 64;

    ShowWindow (hwnd, nCmdShow);

    while (GetMessage (&messages, NULL, 0, 0))
    {
        TranslateMessage(&messages);
        DispatchMessage(&messages);
    }
    return messages.wParam;
}

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
        case WM_PAINT:{
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hwnd, &ps);

            HBRUSH pedzel = CreateSolidBrush(BackroundCol);
            FillRect(hdc, &ObszarRysowany, pedzel);
            DeleteObject(pedzel);

            EndPaint(hwnd, &ps);
            break;
        }
        case WM_COMMAND:{
            if(wParam == ID_DISPLAY)
            {
                int lenght = GetWindowTextLength(hColor);
                char *tekst = new char[lenght+1];
                GetWindowText(hColor, tekst, lenght+1);
                BackroundCol = fGetCol(tekst);
                delete tekst;
                InvalidateRect(hwnd, NULL, TRUE);
            }
            break;
        }
        case WM_DESTROY:
            PostQuitMessage (0);
            break;
        default:
            return DefWindowProc (hwnd, message, wParam, lParam);
    }

    return 0;
}