#include "pch.h"
#include "CDesktop.h"
#include "GdCpp.h"

#include <windows.h>
#include <wingdi.h>

CDesktop::CDesktop()
{
	INT  iNumber = 0;
	BOOL bFlag = TRUE;

	DISPLAY_DEVICE dd;
	ZeroMemory(&dd, sizeof(dd));
	dd.cb = sizeof(dd);


	DEVMODE devMode;
	ZeroMemory(&devMode, sizeof(devMode));
	devMode.dmSize = sizeof(devMode);

	// FixMe：这里只能获取到显卡连接的显示器，获取不到USB-C显示器
	// 而且双显示器分辨率不同时，有时第二个显示器的宽、高变大。
	do
	{
		bFlag = EnumDisplayDevices(NULL, iNumber, &dd, 0);
		bFlag = bFlag && EnumDisplaySettings(dd.DeviceName, ENUM_CURRENT_SETTINGS, &devMode);
		if (bFlag) {
			RECT r;
			r.left= devMode.dmPosition.x;
			r.top = devMode.dmPosition.y;
			r.right = r.left + devMode.dmPelsWidth;
			r.bottom = r.top + devMode.dmPelsHeight;
			screen.push_back(r);
			iNumber += 1;
		}
	} while (bFlag);
}

void CDesktop::TestDesktop()
{
	auto *desktop = new CDesktop();
	auto num = desktop->screen.size();
	if (num == 0) {
		alog->error("No Screen found!");
		return;
	}
	for (int i = 0; i < num; i++) {
		auto &s = desktop->screen[i];
		alog->info("Screen {}: {}, {}, {}, {}", s.left, s.top, s.right - s.left, s.bottom - s.top);
	}
	delete desktop;
}

#include <iostream>
#include <Windows.h>
#include <ShellScalingApi.h>
// 链接Shcore.lib
#pragma comment(lib, "Shcore.lib")

//BOOL CALLBACK MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM dwData)
//{
//	MONITORINFOEX monitorInfo;
//	monitorInfo.cbSize = sizeof(MONITORINFOEX);
//	GetMonitorInfo(hMonitor, &monitorInfo);
//
//	UINT dpiX, dpiY;
//	if (GetDpiForMonitor(hMonitor, MDT_EFFECTIVE_DPI, &dpiX, &dpiY) == S_OK) {
//		std::cout << "Monitor " << monitorInfo.szDevice << " DPI: " << dpiX << std::endl;
//	}
//
//	return TRUE;
//}

// 回调函数用于获取每个显示器的信息
BOOL CALLBACK MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM dwData)
{
	MONITORINFOEX monitorInfo;
	monitorInfo.cbSize = sizeof(MONITORINFOEX);
	GetMonitorInfo(hMonitor, &monitorInfo);

	DISPLAY_DEVICE displayDevice;
	displayDevice.cb = sizeof(DISPLAY_DEVICE);
	EnumDisplayDevices(monitorInfo.szDevice, 0, &displayDevice, 0);

	std::wcout << L"Display Device Name: " << displayDevice.DeviceName << std::endl;
	std::wcout << L"Monitor Name: " << monitorInfo.szDevice << std::endl;
	std::cout << "Monitor Resolution: " << monitorInfo.rcMonitor.right - monitorInfo.rcMonitor.left << "x"
		<< monitorInfo.rcMonitor.bottom - monitorInfo.rcMonitor.top << std::endl;
	std::cout << "Monitor Position: (" << monitorInfo.rcMonitor.left << ", " << monitorInfo.rcMonitor.top << ")"
		<< std::endl;

	// DPI信息获取
	UINT dpiX, dpiY;
	if (GetDpiForMonitor(hMonitor, MDT_EFFECTIVE_DPI, &dpiX, &dpiY) == S_OK) {
		std::cout << "Monitor DPI: " << "x=" << dpiX  << ", y=" << dpiY << std::endl;
	}

	std::cout << std::endl;

	return TRUE;
}
void TestGetDpi() {
	// 获取系统的DPI
	int dpiX = GetDpiForSystem();
	std::cout << "System DPI: " << dpiX << std::endl;

	// 获取主显示器桌面的DPI
	HWND hWndDesktop = GetDesktopWindow();
	if (hWndDesktop != NULL) {
		HMONITOR hMonitor = MonitorFromWindow(hWndDesktop, MONITOR_DEFAULTTONEAREST);
		UINT dpiX, dpiY;
		if (GetDpiForMonitor(hMonitor, MDT_EFFECTIVE_DPI, &dpiX, &dpiY) == S_OK) {
			std::cout << "Desktop DPI: " << dpiX << std::endl;
		}
	}
	std::cout << std::endl;

	// 遍历所有显示器的DPI
	EnumDisplayMonitors(NULL, NULL, MonitorEnumProc, 0);
}