#include<windows.h>
#include"Akima_NI.h"

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
ATOM InitApp(HINSTANCE);
BOOL InitInstance(HINSTANCE,int);

char szClassName[]="Akima_NI";

int WINAPI WinMain(HINSTANCE hCurInst,HINSTANCE hPrevInst,
				   LPSTR lpsCmdLine,int nCmdShow)
{
	MSG msg;
	BOOL bRet;

	if(!InitApp(hCurInst))
		return FALSE;
	if(!InitInstance(hCurInst,nCmdShow))
		return FALSE;
	while((bRet=GetMessage(&msg,NULL,0,0))!=0){
		if(bRet==-1){
			MessageBox(NULL,"GetMessageエラー","Error",MB_OK);
			break;
		}else{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}
	return (int)msg.wParam;
}

ATOM InitApp(HINSTANCE hInst)
{
	WNDCLASSEX wc;
	wc.cbSize=sizeof(WNDCLASSEX);
	wc.style=CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc=WndProc;
	wc.cbClsExtra=0;
	wc.cbWndExtra=0;
	wc.hInstance=hInst;
	wc.hIcon=(HICON)LoadImage(NULL,
		MAKEINTRESOURCE(IDI_APPLICATION),
		IMAGE_ICON,
		0,
		0,
		LR_DEFAULTSIZE|LR_SHARED);
	wc.hCursor=(HCURSOR)LoadImage(NULL,
		MAKEINTRESOURCE(IDC_ARROW),
		IMAGE_CURSOR,
		0,
		0,
		LR_DEFAULTSIZE|LR_SHARED);
	wc.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
	wc.lpszMenuName=NULL;
	wc.lpszClassName=(LPCTSTR)szClassName;
	wc.hIconSm=(HICON)LoadImage(NULL,
		MAKEINTRESOURCE(IDI_APPLICATION),
		IMAGE_ICON,
		0,
		0,
		LR_DEFAULTSIZE|LR_SHARED);

	return RegisterClassEx(&wc);
}

BOOL InitInstance(HINSTANCE hInst,int nCmdShow)
{
	HWND hWnd;

	hWnd=CreateWindow(szClassName,
		"真！ 秋間 浩の補間法",
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		NULL,
		NULL,
		hInst,
		NULL);
	if(!hWnd)
		return FALSE;
	ShowWindow(hWnd,nCmdShow);
	UpdateWindow(hWnd);
	return TRUE;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT msg,WPARAM wp,LPARAM lp)
{
	HDC hdc;
	PAINTSTRUCT ps;
	static akima aki;
	int i;
	static int x[MAX],f[MAX],n;
	static BOOL view,force,info;
	static RECT rc;
	char nokori[64],f1[32];
	static char *kyosei="強制モード";
	static char *setsumei="左クリック：分点追加\n右クリック：(再)描画\nSPACE：クリア"
	"\nCONTROL：観賞モード ←→ 通常モード\nESCAPE：強制モード ←→ 自由モード"
	"\n\n強制モード：不正な分点は無効とします(使用を強く推奨)"
	"\n\n追加した順番で分点間を線で繋ぎます"
	"\nウィンドウサイズ変更に対応しています";

	switch(msg){
		case WM_PAINT:
			hdc=BeginPaint(hWnd,&ps);

			if(!view){
				SetTextColor(hdc,RGB(246,173,205));
				wsprintf(nokori,"あと最大 %d 個の座標を追加できます",MAX-n);
				TextOut(hdc,0,0,nokori,(int)strlen(nokori));
				if(info){
					rc.top=rc.bottom-180;
					DrawText(hdc,(LPCTSTR)setsumei,-1,&rc,DT_WORDBREAK);
					rc.top=0;
					strcpy(f1,"F1：説明非表示");
				}else	strcpy(f1,"F1：説明表示");
	            TextOut(hdc,0,20,f1,(int)strlen(f1));
				if(!force)	DrawText(hdc,(LPCTSTR)kyosei,-1,&rc,DT_RIGHT);

				for(i=0;i<n;i++)
					Ellipse(hdc,x[i]-5,f[i]-5,x[i]+5,f[i]+5);
			}
            aki.draw(hdc,!view);
			
			EndPaint(hWnd,&ps);
			break;
		case WM_LBUTTONDOWN:
			if(n<MAX){
				x[n]=LOWORD(lp);
				f[n]=HIWORD(lp);
				n++;
				if(!force)	aki.force(x,f,&n);
			}
			view=FALSE;
			InvalidateRect(hWnd,NULL,TRUE);
			break;
		case WM_RBUTTONDOWN:
			aki.set(x,f,n);
			view=FALSE;
			InvalidateRect(hWnd,NULL,TRUE);
			break;
		case WM_KEYDOWN:
			switch(wp){
				case VK_SPACE:
					n=0;
					SendMessage(hWnd,WM_RBUTTONDOWN,0,0);
					break;
				case VK_CONTROL:
					view=!view;
					InvalidateRect(hWnd,NULL,TRUE);
					break;
				case VK_ESCAPE:
					force=!force;
					view=FALSE;
					InvalidateRect(hWnd,NULL,TRUE);
					break;
				case VK_F1:
					info=!info;
					view=FALSE;
					InvalidateRect(hWnd,NULL,TRUE);
					break;
			}
			break;
		case WM_SIZE:
			rc.left=0;
			rc.top=0;
			rc.right=LOWORD(lp);
			rc.bottom=HIWORD(lp);
			break;
		case WM_CLOSE:
			DestroyWindow(hWnd);
			break;
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		default:
			return DefWindowProc(hWnd,msg,wp,lp);
	}
	return 0;
}