//=============================================================================
//
//   File : libkvitip.cpp
//   Creation date : Thu May 10 2001 13:50:11 CEST by Szymon Stefanek
//
//   This file is part of the KVIrc IRC client distribution
//   Copyright (C) 2001-2010 Szymon Stefanek (pragma at kvirc dot net)
//
//   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.
//
//=============================================================================

#include "libkvitip.h"

#include "KviModule.h"
#include "KviLocale.h"
#include "KviApplication.h"
#include "KviIconManager.h"
#include "KviOptions.h"
#include "KviFileUtils.h"

#include <QPushButton>
#include <QFont>
#include <QPainter>
#include <QCloseEvent>
#include <QScreen>

TipWindow * g_pTipWindow = nullptr;

TipFrame::TipFrame(QWidget * par)
    : QFrame(par)
{
	QString buffer;
	m_pLabel1 = new QLabel(this);
	m_pLabel2 = new QLabel(this);
	g_pApp->findImage(buffer, "kvi_tip.png");
	m_pLabel1->setPixmap(buffer);
	setStyleSheet("QFrame { background: black; }");
	m_pLabel1->setStyleSheet("QLabel { background: black; }");
	m_pLabel2->setStyleSheet("QLabel { background: black; color: white; }");
	m_pLabel2->setWordWrap(true);
	m_pLabel2->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
	setFrameStyle(QFrame::Sunken | QFrame::WinPanel);
	QGridLayout * layout = new QGridLayout(this);
	layout->addWidget(m_pLabel1, 0, 0, 1, 1);
	layout->addWidget(m_pLabel2, 0, 1, 1, 1);
	layout->setColumnStretch(1, 1);
	setLayout(layout);
}

TipFrame::~TipFrame()
{
	g_pTipWindow = nullptr;
}

void TipFrame::setText(const QString & text)
{
	QString szText = text;
	m_pLabel2->setText(szText);
	update();
}

TipWindow::TipWindow()
{
	setObjectName("kvirc_tip_window");
	m_pConfig = nullptr;

	m_pTipFrame = new TipFrame(this);
	QPushButton * pb = new QPushButton("<<", this);
	connect(pb, SIGNAL(clicked()), this, SLOT(prevTip()));

	QPushButton * pb2 = new QPushButton(">>", this);
	connect(pb2, SIGNAL(clicked()), this, SLOT(nextTip()));

	QPushButton * pb3 = new QPushButton(__tr2qs("Close"), this);
	connect(pb3, SIGNAL(clicked()), this, SLOT(close()));
	pb3->setDefault(true);

	m_pShowAtStartupCheck = new QCheckBox(__tr2qs("Show at startup"), this);
	m_pShowAtStartupCheck->setChecked(KVI_OPTION_BOOL(KviOption_boolShowTipAtStartup));

	setWindowIcon(*(g_pIconManager->getSmallIcon(KviIconManager::Idea)));

	setWindowTitle(__tr2qs("Did You Know...")); //leave title as is

	QGridLayout * layout = new QGridLayout(this);
	layout->addWidget(m_pTipFrame, 0, 0, 1, 5);
	layout->addWidget(m_pShowAtStartupCheck, 1, 0, 1, 1);
	layout->addWidget(pb, 1, 2, 1, 1);
	layout->addWidget(pb2, 1, 3, 1, 1);
	layout->addWidget(pb3, 1, 4, 1, 1);
	setLayout(layout);

	pb3->setFocus();
}

TipWindow::~TipWindow()
{
	KVI_OPTION_BOOL(KviOption_boolShowTipAtStartup) = m_pShowAtStartupCheck->isChecked();
	if(m_pConfig)
		closeConfig();
}

void TipWindow::showEvent(QShowEvent *)
{
	QRect rect = g_pApp->primaryScreen()->availableGeometry();
	move((rect.width() - width()) / 2, (rect.height() - height()) / 2);
}

bool TipWindow::openConfig(QString filename, bool bEnsureExists)
{
	if(m_pConfig)
		closeConfig();

	m_szConfigFileName = filename;
	//	m_szConfigFileName.cutToLast('/');

	QString buffer;
	g_pApp->getReadOnlyConfigPath(buffer, m_szConfigFileName.toUtf8().data(), KviApplication::ConfigPlugins, true);
	qDebug("Check path %s and file %s", buffer.toUtf8().data(), m_szConfigFileName.toUtf8().data());
	if(bEnsureExists)
	{
		if(!KviFileUtils::fileExists(buffer))
			return false;
	}

	m_pConfig = new KviConfigurationFile(buffer, KviConfigurationFile::Read);

	return true;
}

void TipWindow::closeConfig()
{
	QString buffer;
	g_pApp->getLocalKvircDirectory(buffer, KviApplication::ConfigPlugins, m_szConfigFileName);
	m_pConfig->setSavePath(buffer);
	delete m_pConfig;
	m_pConfig = nullptr;
}

void TipWindow::nextTip()
{
	if(!m_pConfig)
	{
		KviCString szLocale = KviLocale::instance()->localeName();
		KviCString szFile;
		szFile.sprintf("libkvitip_%s.kvc", szLocale.ptr());
		if(!openConfig(szFile.ptr(), true))
		{
			szLocale.cutFromFirst('.');
			szLocale.cutFromFirst('_');
			szLocale.cutFromFirst('@');
			szFile.sprintf("libkvitip_%s.kvc", szLocale.ptr());
			if(!openConfig(szFile.ptr(), true))
			{
				openConfig("libkvitip.kvc", false);
			}
		}
	}

	unsigned int uNumTips = m_pConfig->readUIntEntry("uNumTips", 0);
	unsigned int uCurTip = m_pConfig->readUIntEntry("uCurTip", 0);

	uCurTip++;
	if(uCurTip >= uNumTips)
		uCurTip = 0;

	KviCString tmp(KviCString::Format, "%u", uCurTip);
	QString szTip = m_pConfig->readEntry(tmp.ptr(), __tr2qs("<b>Can't find any tip... :(</b>"));

	//qDebug("REDECODED=%s",szTip.toUtf8().data());

	m_pConfig->writeEntry("uCurTip", uCurTip);

	m_pTipFrame->setText(szTip);
}

void TipWindow::prevTip()
{
	if(!m_pConfig)
	{
		KviCString szLocale = KviLocale::instance()->localeName();
		KviCString szFile;
		szFile.sprintf("libkvitip_%s.kvc", szLocale.ptr());
		if(!openConfig(szFile.ptr(), true))
		{
			szLocale.cutFromFirst('.');
			szLocale.cutFromFirst('_');
			szLocale.cutFromFirst('@');
			szFile.sprintf("libkvitip_%s.kvc", szLocale.ptr());
			if(!openConfig(szFile.ptr(), true))
			{
				openConfig("libkvitip.kvc", false);
			}
		}
	}

	unsigned int uNumTips = m_pConfig->readUIntEntry("uNumTips", 0);
	unsigned int uCurTip = m_pConfig->readUIntEntry("uCurTip", 0);

	if(uCurTip == 0)
		uCurTip = uNumTips - 1;
	else
		uCurTip--;

	KviCString tmp(KviCString::Format, "%u", uCurTip);
	QString szTip = m_pConfig->readEntry(tmp.ptr(), __tr2qs("<b>Can't find any tip... :(</b>"));

	//qDebug("REDECODED=%s",szTip.toUtf8().data());

	m_pConfig->writeEntry("uCurTip", uCurTip);

	m_pTipFrame->setText(szTip);
}

/*
	@doc: tip.open
	@type:
		command
	@title:
		tip.open
	@short:
		Opens the "Did You Know..." tip window
	@syntax:
		tip.open [tip_file_name:string]
	@description:
		Opens the "Did You Know..." tip window.<br>
		If <tip_file_name> is specified, that tip is used instead of
		the default tips provided with KVIrc.<br>
		<tip_file_name> must be a file name with no path and must refer to a
		standard KVIrc configuration file found in the global or local
		KVIrc plugin configuration directory ($KVIrcDir/config/modules).<br>
		Once the window has been opened, the next tip available in the config file is shown.<br>
		This command works even if the tip window is already opened.<br>
*/

static bool tip_kvs_cmd_open(KviKvsModuleCommandCall * c)
{
	QString szTipfilename;
	KVSM_PARAMETERS_BEGIN(c)
	KVSM_PARAMETER("filename", KVS_PT_STRING, KVS_PF_OPTIONAL, szTipfilename)
	KVSM_PARAMETERS_END(c)

	if(!g_pTipWindow)
		g_pTipWindow = new TipWindow();
	if(!szTipfilename.isEmpty())
		g_pTipWindow->openConfig(szTipfilename);
	g_pTipWindow->nextTip();
	g_pTipWindow->show();
	return true;
}

static bool tip_module_init(KviModule * m)
{
	KVSM_REGISTER_SIMPLE_COMMAND(m, "open", tip_kvs_cmd_open);
	return true;
}

static bool tip_module_cleanup(KviModule *)
{
	if(g_pTipWindow)
		g_pTipWindow->close();
	return true;
}

static bool tip_module_can_unload(KviModule *)
{
	return (g_pTipWindow == nullptr);
}

KVIRC_MODULE(
    "Tip",                                                          // module name
    "4.0.0",                                                        // module version
    "Copyright (C) 2000 Szymon Stefanek (pragma at kvirc dot net)", // author & (C)
    "\"Did you know...\" tip",
    tip_module_init,
    tip_module_can_unload,
    0,
    tip_module_cleanup,
    0)