//-mwindows -lgdi32
#include <windows.h>
#include <stdio.h>
#include <time.h>

#define WIDTH  500
#define HEIGHT 500
#define TARGET_COUNT 3  // 3个球

// 靶子
int targetX[TARGET_COUNT];
int targetY[TARGET_COUNT];
int targetSize = 30;
int minSize = 10;
int maxSize = 80;

// 数据统计
int totalHits = 0;
int totalClicks = 0;
float hitRate = 0.0f;

clock_t startTime;
double totalTime = 0;
double perHitTime = 0;

// 双缓冲
HDC memDC;
HBITMAP memBitmap;

// 【核心修改】只在中心附近生成球（不会散开）
void SpawnOneTarget(int index)
{
    // 限制在屏幕中心 250x250 范围内，球靠得非常近
    int centerX = WIDTH / 2 - 125;
    int centerY = HEIGHT / 2 - 125;
    targetX[index] = centerX + rand() % 250;
    targetY[index] = centerY + rand() % 250;
}

// 生成所有3个靶子
void SpawnAllTargets()
{
    for (int i = 0; i < TARGET_COUNT; i++)
        SpawnOneTarget(i);
}

// 初始化
void GameInit()
{
    srand((unsigned)time(NULL));
    totalHits = 0;
    totalClicks = 0;
    hitRate = 0;
    startTime = clock();
    SpawnAllTargets();
}

// 创建画布
void CreateCanvas(HWND hWnd)
{
    HDC hdc = GetDC(hWnd);
    memDC = CreateCompatibleDC(hdc);
    memBitmap = CreateCompatibleBitmap(hdc, WIDTH, HEIGHT);
    SelectObject(memDC, memBitmap);
    ReleaseDC(hWnd, hdc);
}

// 窗口消息
LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    static HFONT font;
    switch(msg)
    {
        case WM_CREATE:
            font = CreateFont(22,0,0,0, FW_BOLD, 0,0,0,0,0,0,0,0, "微软雅黑");
            CreateCanvas(hWnd);
            GameInit();
            SetTimer(hWnd, 1, 30, NULL);
            break;

        case WM_TIMER:
            InvalidateRect(hWnd, NULL, FALSE);
            break;

        // 鼠标点击
        case WM_LBUTTONDOWN:
        {
            totalClicks++;
            int mx = LOWORD(lParam);
            int my = HIWORD(lParam);

            // 判断击中哪个球 → 击中就刷新
            for(int i=0; i<TARGET_COUNT; i++)
            {
                if(mx >= targetX[i] && mx <= targetX[i]+targetSize &&
                   my >= targetY[i] && my <= targetY[i]+targetSize)
                {
                    totalHits++;
                    SpawnOneTarget(i);
                    break;
                }
            }

            // 计算数据
            hitRate = (totalClicks == 0) ? 0 : (totalHits * 100.0 / totalClicks);
            totalTime = (double)(clock() - startTime) / CLOCKS_PER_SEC;
            perHitTime = (totalHits == 0) ? 0 : (totalTime / totalHits);
            break;
        }

        // + - 调节大小
        case WM_KEYDOWN:
            if(wParam == VK_ADD || wParam == '=')
            {
                if(targetSize < maxSize) targetSize += 4;
            }
            if(wParam == VK_SUBTRACT || wParam == '-')
            {
                if(targetSize > minSize) targetSize -= 4;
            }
            break;

        case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hWnd, &ps);

            // 背景
            HBRUSH black = CreateSolidBrush(RGB(0,0,0));
            SelectObject(memDC, black);
            Rectangle(memDC, 0,0, WIDTH,HEIGHT);
            DeleteObject(black);

            // 画3个红球
            HBRUSH redBrush = CreateSolidBrush(RGB(255,50,50));
            SelectObject(memDC, redBrush);
            for(int i=0; i<TARGET_COUNT; i++)
                Ellipse(memDC, targetX[i], targetY[i],
                        targetX[i]+targetSize, targetY[i]+targetSize);
            DeleteObject(redBrush);

            // 文字
            SelectObject(memDC, font);
            SetTextColor(memDC, RGB(255,255,255));
            SetBkMode(memDC, TRANSPARENT);

            char buf[256];
            sprintf(buf, "得分：%d", totalHits);
            TextOutA(memDC, 20, 20, buf, strlen(buf));

            sprintf(buf, "命中率：%.1f%%", hitRate);
            TextOutA(memDC, 20, 50, buf, strlen(buf));

            sprintf(buf, "总时间：%.1f 秒", totalTime);
            TextOutA(memDC, 20, 80, buf, strlen(buf));

            sprintf(buf, "每球用时：%.2f 秒", perHitTime);
            TextOutA(memDC, 20, 110, buf, strlen(buf));

            sprintf(buf, "球大小：%d (+ 增大 | - 减小)", targetSize);
            TextOutA(memDC, 20, 140, buf, strlen(buf));

            // 显示画面
            BitBlt(hdc,0,0,WIDTH,HEIGHT, memDC,0,0,SRCCOPY);
            EndPaint(hWnd, &ps);
            break;
        }

        case WM_DESTROY:
            KillTimer(hWnd,1);
            DeleteObject(memBitmap);
            DeleteDC(memDC);
            DeleteObject(font);
            PostQuitMessage(0);
            break;
    }
    return DefWindowProc(hWnd,msg,wParam,lParam);
}

// 入口
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR cmd, int nShow)
{
    WNDCLASSA wc = {0};
    wc.lpfnWndProc = WndProc;
    wc.hInstance = hInst;
    wc.lpszClassName = "AimTrainer3";
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);

    RegisterClassA(&wc);

    HWND hWnd = CreateWindowA(
        "AimTrainer3", "豆包超牛福；分不清已吓哭",
        WS_CAPTION | WS_SYSMENU,
        100,100, WIDTH+16, HEIGHT+38,
        NULL,NULL,hInst,NULL
    );

    ShowWindow(hWnd, nShow);
    UpdateWindow(hWnd);

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