#include <windows.h>
#include <windowsx.h>
#include "Data.h"
#include "Scene2D.h"

LRESULT _stdcall WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
int _stdcall WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	WNDCLASS wc;
	wc.style = CS_OWNDC;
	wc.lpfnWndProc = WndProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = hInstance;
	wc.hIcon = LoadIcon(nullptr, IDI_APPLICATION);
	wc.hCursor = LoadCursor(nullptr, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)(6);
	wc.lpszMenuName = 0;
	wc.lpszClassName = (LPCSTR)"MainWindowClass";
	RegisterClass(&wc);

	HWND hWnd = CreateWindow(
		(LPCSTR)"MainWindowClass",
		(LPCSTR)"VTORAYA BLYAT'",
		WS_OVERLAPPEDWINDOW,
		200,200,800,800,
		nullptr,nullptr,hInstance,nullptr);

	ShowWindow(hWnd,nCmdShow);
	UpdateWindow(hWnd);

	MSG msg;
	while(GetMessage(&msg,nullptr,0,0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	return 0;
}

Scene2D scene(-3, 3, -2, 2);

LRESULT _stdcall WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch(msg)
	{
	case WM_PAINT:
		{
			HDC dc = GetDC(hWnd);
			scene.Clear(hWnd, dc);
			scene.PlotAxe(dc);

			scene.First___MethodFuncPlot(dc);

			scene.Second___MethodFuncPlot(dc);

			scene.Third___MethodFuncPlot(dc);

			ReleaseDC(hWnd, dc);
			return DefWindowProc(hWnd,msg,wParam,lParam);
		}

	case WM_SIZE:
		{
			HDC dc = GetDC(hWnd);
			scene.SetResolution(hWnd, dc);
			ReleaseDC(hWnd,dc);
			InvalidateRect(hWnd,nullptr,false);
			return 0;
		}
	case WM_LBUTTONDOWN:
	{
		scene.startDragging(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
		return 0;
	}
	case WM_MOUSEMOVE:
	{
		if (scene.IsDragging())
		{
			scene.dragging(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
			InvalidateRect(hWnd, nullptr, false);
		}
		return 0;
	}
	case WM_LBUTTONUP:
	{
		scene.StopDragging();
		return 0;
	}
	case WM_MOUSEWHEEL:
	{
		POINT P;
		P.x = GET_X_LPARAM(lParam);
		P.y = GET_Y_LPARAM(lParam);
		ScreenToClient(hWnd, &P);

		bool delta = (GET_WHEEL_DELTA_WPARAM(wParam) >= 0) ? true : false;
		scene.Zooming(delta, P.x, P.y);
		InvalidateRect(hWnd, nullptr, false);
		return 0;

	}
	case WM_DESTROY:
	{
		PostQuitMessage(0);
		return 0;
	}
	default:
		{
			return DefWindowProc(hWnd, msg, wParam, lParam);
		}
	}
	return 0;
}