/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#if defined(GPH_DEVICE)

// Disable symbol overrides so that we can use system headers.
#define FORBIDDEN_SYMBOL_ALLOW_ALL

#include "backends/platform/sdl/sdl-sys.h"

#include "backends/platform/gph/gph-hw.h"
#include "backends/platform/gph/gph.h"
#include "backends/plugins/posix/posix-provider.h"
#include "backends/saves/default/default-saves.h"
#include "backends/timer/default/default-timer.h"

#include "common/archive.h"
#include "common/config-manager.h"
#include "common/debug.h"
#include "common/events.h"
#include "common/file.h"
#include "common/textconsole.h"
#include "common/util.h"

#include "audio/mixer_intern.h"

#include <unistd.h> // for getcwd()

/* Dump console info to files. */
#define DUMP_STDOUT

OSystem_GPH::OSystem_GPH()
	:
	OSystem_POSIX() {
}

Common::String OSystem_GPH::getCurrentDirectory() {
	char cwd[MAXPATHLEN+1];
	return Common::String(getcwd(cwd, MAXPATHLEN));
}

void OSystem_GPH::initBackend() {

	assert(!_inited);

	/* Setup default save path to be workingdir/saves */

	Common::String workDirName = getCurrentDirectory();
	if (workDirName.empty()) {
		error("Could not obtain current working directory.");
	} else {
		printf("Current working directory: %s\n", workDirName.c_str());
	}

	Common::String savePath = workDirName + "/saves";
	printf("Current save directory: %s\n", savePath.c_str());
	_savefileManager = new DefaultSaveFileManager(savePath);

#ifdef DUMP_STDOUT
	// The GPH devices have a serial console on the breakout board
	// but most users do not use this so we output all our STDOUT
	// and STDERR to files for debug purposes.
	Common::String STDOUT_FILE = workDirName + "/scummvm.stdout.txt";
	Common::String STDERR_FILE = workDirName + "/scummvm.stderr.txt";

	// Flush the output in case anything is queued
	fclose(stdout);
	fclose(stderr);

	// Redirect standard input and standard output
	FILE *newfp = freopen(STDOUT_FILE.c_str(), "w", stdout);
	if (newfp == NULL) {
#if !defined(stdout)
		stdout = fopen(STDOUT_FILE.c_str(), "w");
#else
		newfp = fopen(STDOUT_FILE.c_str(), "w");
		if (newfp) {
			*stdout = *newfp;
		}
#endif
	}

	newfp = freopen(STDERR_FILE.c_str(), "w", stderr);
	if (newfp == NULL) {
#if !defined(stderr)
		stderr = fopen(STDERR_FILE.c_str(), "w");
#else
		newfp = fopen(STDERR_FILE.c_str(), "w");
		if (newfp) {
			*stderr = *newfp;
		}
#endif
	}

	setbuf(stderr, NULL);
	printf("%s\n", "Debug: STDOUT and STDERR redirected to text files.");
#endif /* DUMP_STDOUT */

	/* Initialize any GP2X Wiz specific stuff we may want (Batt Status, scaler etc.) */
	WIZ_HW::deviceInit();

	/* Set Default hardware mixer volume to a preset level (VOLUME_INITIAL). This is done to 'reset' volume level if set by other apps. */
	WIZ_HW::mixerMoveVolume(0);

	/* Up default volume values as we use a seperate system level volume anyway. */
	ConfMan.registerDefault("music_volume", 192);
	ConfMan.registerDefault("sfx_volume", 192);
	ConfMan.registerDefault("speech_volume", 192);

	/* Trigger autosave every 4 minutes - On low batts 5 mins is about your warning time. */
	ConfMan.registerDefault("autosave_period", 4 * 60);

	/* Make sure that aspect ratio correction is enabled on the 1st run to stop
	   users asking me what the 'wasted space' at the bottom is ;-). */
	ConfMan.registerDefault("aspect_ratio", true);
	ConfMan.registerDefault("fullscreen", true);

	/* Make sure SDL knows that we have a joystick we want to use. */
	ConfMan.setInt("joystick_num", 0);

	// Create the events manager
	if (_eventSource == 0)
		_eventSource = new GPHEventSource();

	// Create the graphics manager
	if (_graphicsManager == 0) {
		_graphicsManager = new GPHGraphicsManager(_eventSource, _window);
	}

	/* Pass to POSIX method to do the heavy lifting */
	OSystem_POSIX::initBackend();

	_inited = true;
}

void OSystem_GPH::initSDL() {
	// Check if SDL has not been initialized
	if (!_initedSDL) {

		uint32 sdlFlags = SDL_INIT_EVENTTHREAD | SDL_INIT_VIDEO;
		if (ConfMan.hasKey("disable_sdl_parachute"))
			sdlFlags |= SDL_INIT_NOPARACHUTE;

		// Initialize SDL (SDL Subsystems are initiliazed in the corresponding sdl managers)
		if (SDL_Init(sdlFlags) == -1)
			error("Could not initialize SDL: %s", SDL_GetError());

		_initedSDL = true;
	}
}

void OSystem_GPH::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {

	/* Setup default extra data paths for engine data files and plugins */
	Common::String workDirName = getCurrentDirectory();
	if (workDirName.empty()) {
		error("Error: Could not obtain current working directory.");
	}

	Common::FSNode workdirNode(workDirName);
	if (workdirNode.exists() && workdirNode.isDirectory()) {
		s.add("__GP2XWIZ_WORKDIR__", new Common::FSDirectory(workDirName), priority);
	}

	Common::String enginedataPath = workDirName + "/engine-data";
	Common::FSNode engineNode(enginedataPath);
	if (engineNode.exists() && engineNode.isDirectory()) {
		s.add("__GP2XWIZ_ENGDATA__", new Common::FSDirectory(enginedataPath), priority);
	}

	Common::String pluginsPath = workDirName + "/plugins";
	Common::FSNode pluginsNode(pluginsPath);
	if (pluginsNode.exists() && pluginsNode.isDirectory()) {
		s.add("__GP2XWIZ_PLUGINS__", new Common::FSDirectory(pluginsPath), priority);
	}
}

void OSystem_GPH::quit() {

	WIZ_HW::deviceDeinit();

#ifdef DUMP_STDOUT
	printf("%s\n", "Debug: STDOUT and STDERR text files closed.");
	fclose(stdout);
	fclose(stderr);
#endif /* DUMP_STDOUT */

	OSystem_POSIX::quit();
}

#endif