// DllMain.cpp : Runtime.dll 的入口点。
//


#include "pch.h"
#include "MagWindow.h"
#include "Env.h"
#include <spdlog/spdlog.h>

HINSTANCE hInst = NULL;


// DLL 入口
BOOL APIENTRY DllMain(
	HMODULE hModule,
	DWORD  ul_reason_for_call,
	LPVOID lpReserved
) {
	switch (ul_reason_for_call) {
	case DLL_PROCESS_ATTACH:
		hInst = hModule;
		break;
	case DLL_PROCESS_DETACH:
		break;
	case DLL_THREAD_ATTACH:
		break;
	case DLL_THREAD_DETACH:
		break;
	}
	return TRUE;
}


API_DECLSPEC void WINAPI RunMagWindow(
	void reportStatus(int status, const wchar_t* errorMsg),
	HWND hwndSrc,
	const char* scaleModel,
	int captureMode,
	bool showFPS,
	bool noDisturb
) {
	Debug::ThrowIfComFailed(
		CoInitializeEx(NULL, COINIT_MULTITHREADED),
		L"初始化 COM 出错"
	);

	try {
		Debug::Assert(
			IsWindow(hwndSrc) && IsWindowVisible(hwndSrc) && Utils::GetWindowShowCmd(hwndSrc) == SW_NORMAL,
			L"不合法的源窗口"
		);
		Debug::Assert(
			captureMode >= 0 && captureMode <= 1,
			L"非法的抓取模式"
		);

		Env::CreateInstance(hInst, hwndSrc, scaleModel, captureMode, showFPS, noDisturb);
		MagWindow::CreateInstance();
	} catch(const magpie_exception& e) {
		reportStatus(0, (L"创建全屏窗口出错：" + e.what()).c_str());
		return;
	} catch (...) {
		Debug::WriteErrorMessage(L"创建全屏窗口发生未知错误");
		reportStatus(0, L"未知错误");
		return;
	}
	
	reportStatus(2, nullptr);

	// 主消息循环
	std::wstring errMsg = MagWindow::RunMsgLoop();

	Env::$instance = nullptr;
	reportStatus(0, errMsg.empty() ? nullptr : errMsg.c_str());
}