#include<windows.h>
#include<stdio.h>
#include"smf.h"

// winmm.lib をリンクする
#pragma comment(lib,"winmm")

LRESULT CALLBACK WindowProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	char str[64];

	static SmfPlay sp("AUTUMN","MIDI");

	static double endTime;
	char end[32];

	MMTIME mmt;
	static DWORD currentTime;
	char current[32];

	switch(uMsg){
		case WM_CREATE:
			endTime=sp.GetEndTime();
			SetTimer(hWnd,1,50,NULL);
			return 0;
		case WM_KEYDOWN:
			switch(wParam){
				case 'A': sp.Play(); return 0;
				case 'S': sp.Pause(); return 0;
				case 'D': sp.Stop(); return 0;
				case 'F': sp.CreateSMF("smf0.mid"); return 0;
			}
			return 0;
		case WM_TIMER:
			mmt.wType=TIME_MS;
			sp.GetCurrentPosition(&mmt,sizeof(MMTIME));
			currentTime=mmt.u.ms;
			InvalidateRect(hWnd,NULL,FALSE);
			return 0;
		case WM_PAINT:
			hdc=BeginPaint(hWnd,&ps);
			sprintf(end,"%lf",endTime);
			sprintf(current,"%lf",currentTime/1000.0);
			wsprintf(str,"%s / %s",current,end);
            TextOut(hdc,0,0,str,lstrlen(str));
			EndPaint(hWnd,&ps);
			return 0;
		case WM_DESTROY:
			KillTimer(hWnd,1);
			PostQuitMessage(0);
			return 0;
	}
	return DefWindowProc(hWnd,uMsg,wParam,lParam);
}

int WINAPI WinMain(
	HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR lpCmdLine,int nCmdShow)
{
	WNDCLASS wc;
	MSG msg;

	wc.style		 = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc	 = WindowProc;
	wc.cbClsExtra	 = 0;
	wc.cbWndExtra	 = 0;
	wc.hInstance	 = hInstance;
	wc.hIcon		 = LoadIcon(NULL,IDI_APPLICATION);
	wc.hCursor		 = LoadCursor(NULL,IDC_ARROW);
	wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wc.lpszMenuName	 = NULL;
	wc.lpszClassName = __FILE__;
	if(!RegisterClass(&wc)) return 0;

	HWND hWnd=CreateWindow(
		__FILE__,"MIDIストリーム",
		WS_OVERLAPPEDWINDOW | WS_VISIBLE,
		CW_USEDEFAULT,CW_USEDEFAULT,
		CW_USEDEFAULT,CW_USEDEFAULT, 
		NULL,NULL,hInstance,NULL);
	if(hWnd==NULL) return 0;

	BOOL bRet;
	while((bRet=GetMessage(&msg,NULL,0,0))!=0){
		if(bRet==-1) break;
		DispatchMessage(&msg);
	}

	return (int)msg.wParam;
}