// Copyright (c) 2012- PPSSPP Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.

#pragma once

#include "Common/CommonTypes.h"
#include "Common/File/Path.h"

#include "Core/CoreParameter.h"

class HeadlessHost {
public:
	virtual ~HeadlessHost() {}
	virtual bool InitGraphics(std::string *error_message, GraphicsContext **ctx, GPUCore core) {return false;}
	virtual void ShutdownGraphics() {}

	virtual void SendDebugOutput(const std::string &output) {
		if (!writeDebugOutput_)
			return;
		if (output.find('\n') != output.npos) {
			FlushDebugOutput();
			fwrite(output.data(), sizeof(char), output.length(), stdout);
		} else {
			debugOutputBuffer_ += output;
		}
	}
	void FlushDebugOutput() {
		if (!debugOutputBuffer_.empty()) {
			fwrite(debugOutputBuffer_.data(), sizeof(char), debugOutputBuffer_.length(), stdout);
			debugOutputBuffer_.clear();
		}
	}

	void SetWriteDebugOutput(bool flag) {
		writeDebugOutput_ = flag;
	}

	void SetComparisonScreenshot(const Path &filename, double maxError) {
		comparisonScreenshot_ = filename;
		maxScreenshotError_ = maxError;
	}
	void SetWriteFailureScreenshot(bool flag) {
		writeFailureScreenshot_ = flag;
	}

	void SendDebugScreenshot(const u8 *pixbuf, u32 w, u32 h);

	virtual void SwapBuffers() {}

protected:
	void SendAndCollectOutput(const std::string &output);

	Path comparisonScreenshot_;
	double maxScreenshotError_ = 0.0;
	std::string debugOutputBuffer_;
	GPUCore gpuCore_;
	GraphicsContext *gfx_ = nullptr;
	bool writeFailureScreenshot_ = true;
	bool writeDebugOutput_ = true;
};