/*
 * PowerService.cpp
 *
 *  Created on: Feb 1, 2021
 *      Author: emanoil
 *
 * hardwarecontrol Copyright (C) 2021 trinity desktop development team
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <unistd.h>

//#include <kdebug.h>
#include <tqfile.h>
#include <tqtextstream.h>

#include "PowerService.h"

#define POWER_STATE_PATH  "/sys/power/state"
#define POWER_DISK_PATH   "/sys/power/disk"

PowerService::PowerService(TQT_DBusConnection &conn)
: DeviceServiceBase(conn)
{
    // TODO Auto-generated constructor stub

}

PowerService::~PowerService()
{
    // TODO Auto-generated destructor stub
}

bool PowerService::canSetPower(TQString state, TQT_DBusError& error) {

    bool method = false;
    if (canSetDeviceValue(POWER_STATE_PATH,error)) {
        TQFile file1( POWER_STATE_PATH );
        if ( file1.open( IO_ReadOnly ) ) {
            TQTextStream stream( &file1 );
            TQString line = stream.readLine(); // line of text excluding '\n'
            if ( line.find(state, 0) != -1 )
                method = true;
            file1.close();
        } else {
            error = TQT_DBusError::stdInvalidArgs(TQString ("Can not write device: ").append(POWER_STATE_PATH));
        }
    }

    // send reply
    return method;
}

bool PowerService::setPower(TQString state, TQT_DBusError& error) {

    bool written = false;
    if (canSetPower(state,error)) {
        if ( setDeviceValue(POWER_STATE_PATH, state, error) ) {
            written = true;
        } else {
            error = TQT_DBusError::stdFailed(TQString ("Can not set state: " + state));
        }
    } else {
        error = TQT_DBusError::stdFailed(TQString ("Can not write device: ").append(POWER_STATE_PATH));
    }

    return written;
}

bool PowerService::canSetHibernation(TQString state, TQT_DBusError& error) {

    // check if path is writable
    bool state_writable = canSetDeviceValue(POWER_STATE_PATH,error);
    bool disk_writable = canSetDeviceValue(POWER_DISK_PATH,error);

    // check if method is supported
    bool method1 = false, method2 = false;
    if (state_writable && disk_writable) {
        TQFile file1( POWER_STATE_PATH );
        if ( file1.open( IO_ReadOnly ) ) {
            TQTextStream stream( &file1 );
            TQString line = stream.readLine(); // line of text excluding '\n'
            if ( line.find("disk", 0) != -1 )
                method1 = true;
            file1.close();
//            kdDebug() <<  "Method1 for " << state << " is " << method1 << "\n";
        } else {
            error = TQT_DBusError::stdInvalidArgs(TQString ("Could not open ").append(POWER_STATE_PATH));
            return false;
        }

        TQFile file2(POWER_DISK_PATH);
        if ( file2.open( IO_ReadOnly ) ) {
            TQTextStream stream( &file2 );
            TQString line = stream.readLine(); // line of text excluding '\n'
            if ( line.find(state, 0) != -1 )
                method2 = true;
            file2.close();
        } else {
            error = TQT_DBusError::stdInvalidArgs(TQString ("Could not open ").append(POWER_DISK_PATH));
            return false;
        }
    }

    // send reply
    return state_writable && disk_writable && method1 && method2;
}

bool PowerService::setHibernation(TQString state, TQT_DBusError& error) {

    // set hibernation state
    bool written1 = false, written2 = false;

    if (canSetHibernation(state,error)) {
        TQFile file1(POWER_DISK_PATH);
        if (!file1.open( IO_WriteOnly ) ) {
            error = TQT_DBusError::stdFailed(TQString ("Could not open device ").append(POWER_DISK_PATH));
            return false;
        }
        TQTextStream stream1( &file1 );
        stream1 << state;
        file1.close();
        written1 = true;

        TQFile file2(POWER_STATE_PATH);
        if (!file2.open( IO_WriteOnly ) ) {
            error = TQT_DBusError::stdFailed(TQString ("Could not open device ").append(POWER_STATE_PATH));
            return false;
        }
        TQTextStream stream2( &file2 );
        stream2 << "disk";
        file2.close();
        written2 = true;
    } else {
        error = TQT_DBusError::stdFailed(TQString ("Could not set state: " + state));
        return false;
    }

    return written1 && written2;
}

/*!
 * Implement virtual methods
 *
 */

bool PowerService::CanStandby(bool& value, TQT_DBusError& error) {
    value = canSetPower("standby", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::Standby(bool& value, TQT_DBusError& error) {
    value = setPower("standby", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::CanFreeze(bool& value, TQT_DBusError& error) {
    value = canSetPower("freeze", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::Freeze(bool& value, TQT_DBusError& error) {
    value = setPower("freeze", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::CanSuspend(bool& value, TQT_DBusError& error) {
    value = canSetPower("mem", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::Suspend(bool& value, TQT_DBusError& error) {
    value = setPower("mem", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::CanHibernate(bool& value, TQT_DBusError& error) {
    value = canSetHibernation("platform", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::Hibernate(bool& value, TQT_DBusError& error) {
    value = setHibernation("platform", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::CanHybridSuspend(bool& value, TQT_DBusError& error) {
    value = canSetHibernation("suspend", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::HybridSuspend(bool& value, TQT_DBusError& error) {
    value = setHibernation("suspend", error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::CanSetHibernationMethod(bool& value, TQT_DBusError& error) {
    value = canSetDeviceValue(POWER_DISK_PATH, error);
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}

bool PowerService::SetHibernationMethod(const TQString& method, bool& value, TQT_DBusError& error) {
    // set hibernation method
    if (!method.isEmpty()) {
        value = setDeviceValue(POWER_DISK_PATH, method, error);
    }
    else {
        value = false;
        error = TQT_DBusError::stdInvalidArgs(TQString ("Invalid argument for method: " + method));
    }
    if (error.isValid()) {
        tqDebug(error.message().local8Bit());
        return false;
    }
    return true;
}


void PowerService::handleMethodReply(const TQT_DBusMessage& reply) {
    m_connection->send(reply);
}