#include "themetuner.h"
#include "uiconfig.h"
#include "mainwindow.h"
#include "uiconfig.h"
#include <QApplication>
#include <QFile>
#include <QStyle>
#include <QDebug>

ThemeTuner* ThemeTuner::instance = nullptr;

ThemeTuner::ThemeTuner(QObject* parent) :
 QObject(parent)
{
 init();
}

void ThemeTuner::tuneTheme(const QString& themeName)
{
 tuneCss(themeName);
}

void ThemeTuner::tuneCurrentTheme()
{
 tuneTheme(QApplication::style()->objectName());
}

void ThemeTuner::manageCompactLayout(QWidget* w)
{
 manageCompactLayout(QList<QWidget*>({w}));
}

void ThemeTuner::manageCompactLayout(QList<QWidget*> wList)
{
 widgetsForCompactLayout += wList;
 for (QWidget* w : wList)
 connect(w, SIGNAL(destroyed()), this, SLOT(handleWidgetDestroyed()));

 handleCompactLayoutChange(CFG_UI.General.CompactLayout.get());
}

QString ThemeTuner::getDefaultCss(const QString& themeName) const
{
 QString css = defaultGeneralCss;
 QString lowerTheme = themeName.toLower();
 if (!themeName.isNull() && defaultPerStyleCss.contains(lowerTheme))
 css += "\n" + defaultPerStyleCss[lowerTheme];

 return css;
}

ThemeTuner* ThemeTuner::getInstance()
{
 if (!instance)
 instance = new ThemeTuner();

 return instance;
}

void ThemeTuner::cleanUp()
{
 if (instance)
 safe_delete(instance);
}

void ThemeTuner::init()
{
 QFile f(":/css/general.css");
 if (!f.open(QIODevice::ReadOnly))
 {
 qCritical() << "Could not open general.css";
 return;
 }

 defaultGeneralCss = QString::fromLatin1(f.readAll());
 f.close();

 connect(CFG_UI.General.CompactLayout, SIGNAL(changed(QVariant)), this, SLOT(handleCompactLayoutChange(QVariant)));
}

void ThemeTuner::tuneCss(const QString& themeName)
{
 if (!CFG_UI.General.CustomCss.get().isNull())
 {
 applyCss(CFG_UI.General.CustomCss.get());
 return;
 }

 applyCss(getDefaultCss(themeName));
}

void ThemeTuner::applyCss(const QString& css)
{
 MAINWINDOW->setStyleSheet(css);
}

void ThemeTuner::handleWidgetDestroyed()
{
 QWidget* w = dynamic_cast<QWidget*>(sender());
 if (!w)
 return;

 widgetsForCompactLayout.removeOne(w);
}

void ThemeTuner::handleCompactLayoutChange(const QVariant& newValue)
{
 if (newValue.toBool())
 {
 for (QWidget* w : widgetsForCompactLayout)
 {
 w->layout()->setContentsMargins(0, 0, 0, 0);
 w->layout()->setSpacing(0);
 }
 }
 else
 {
 for (QWidget* w : widgetsForCompactLayout)
 {
 w->layout()->setContentsMargins(-1, -1, -1, -1);
 w->layout()->setSpacing(-1);
 }
 }
}