//===========================================
//  Lumina Desktop Source Code
//  Copyright (c) 2016, Ken Moore
//  Available under the 3-clause BSD license
//  See the LICENSE file for full details
//===========================================
#include "page_main.h"
#include "ui_page_main.h"
#include "getPage.h"

//==========
//    PUBLIC
//==========
page_main::page_main(QWidget *parent) : PageWidget(parent), ui(new Ui::page_main()){
  ui->setupUi(this);
  findShort = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_F), this, SLOT(showFind()));
  ui->treeWidget->setMouseTracking(true);
  ui->treeWidget->setSortingEnabled(false); //the QTreeView sort flag always puts them in backwards (reverse-alphabetical)
  connect(ui->treeWidget, SIGNAL(itemActivated(QTreeWidgetItem*,int)), this, SLOT(itemTriggered(QTreeWidgetItem*, int)) );
  connect(ui->treeWidget, SIGNAL(itemPressed(QTreeWidgetItem*,int)), this, SLOT(itemTriggered(QTreeWidgetItem*, int)) );

  connect(ui->lineEdit, SIGNAL(textChanged(QString)), this, SLOT(searchChanged(QString)) );
}

page_main::~page_main(){

}

void page_main::setPreviousPage(QString id){
  if(id.isEmpty()){ return; }
  for(int i=0; i<ui->treeWidget->topLevelItemCount(); i++){
    for(int j=0; j<ui->treeWidget->topLevelItem(i)->childCount(); j++){
      if(ui->treeWidget->topLevelItem(i)->child(j)->whatsThis(0)==id){
        ui->treeWidget->setCurrentItem(ui->treeWidget->topLevelItem(i)->child(j), 0);
        ui->treeWidget->scrollToItem(ui->treeWidget->topLevelItem(i)->child(j));
        return; //found item - done
      }else if(ui->treeWidget->topLevelItem(i)->child(j)->whatsThis(1)==id){
        ui->treeWidget->setCurrentItem(ui->treeWidget->topLevelItem(i)->child(j), 1);
        ui->treeWidget->scrollToItem(ui->treeWidget->topLevelItem(i)->child(j));
        return; //found item - done
      }
    }
  }
  
}

void page_main::UpdateItems(QString search){
  ui->treeWidget->clear();
  ui->treeWidget->setColumnCount(2);
  //First create the categories
  QTreeWidgetItem *interface = new QTreeWidgetItem();
    interface->setIcon(0, LXDG::findIcon("preferences-desktop",""));
    interface->setText(0, tr("Interface Configuration"));
    interface->setFirstColumnSpanned(true);
  QTreeWidgetItem *appearance = new QTreeWidgetItem();
    appearance->setIcon(0, LXDG::findIcon("preferences-desktop-color",""));
    appearance->setText(0, tr("Appearance"));
    appearance->setFirstColumnSpanned(true);
  QTreeWidgetItem *session = new QTreeWidgetItem();
    session->setIcon(0, LXDG::findIcon("preferences-system-session-services",""));
    session->setText(0, tr("Desktop Defaults"));
    session->setFirstColumnSpanned(true);
  QTreeWidgetItem *user = new QTreeWidgetItem();
    user->setIcon(0, LXDG::findIcon("preferences-desktop-user",""));
    user->setText(0, tr("User Settings"));
    user->setFirstColumnSpanned(true);
  //Now go through and add in the known pages for each category
  QStringList SL = search.split(" "); //search list
  for(int i=0; i<INFO.length(); i++){
    if(!search.isEmpty() ){
      //See if this item needs to be included or not
      QStringList info; info << INFO[i].name.split(" ") << INFO[i].title.split(" ") << INFO[i].comment.split(" ") << INFO[i].search_tags;
      info.removeDuplicates(); //remove any duplicate terms/info first
      bool ok = true;
      for(int s=0; s<SL.length() && ok; s++){
	ok = !info.filter(SL[s]).isEmpty();
      }
      if(!ok){ continue; } //no duplicates between search terms and available info
    }
    //qDebug() << "Item Found:" << INFO[i].id << INFO[i].title;
    int col = 0;
    QTreeWidgetItem *lastIt = 0;
    if(INFO[i].category=="interface" && interface->childCount()>0 ){ 
      if( interface->child( interface->childCount()-1)->text(1).isEmpty() ){ lastIt = interface->child(interface->childCount()-1); }
   }else if(INFO[i].category=="appearance"  && appearance->childCount()>0 ){
      if( appearance->child(appearance->childCount()-1)->text(1).isEmpty() ){ lastIt = appearance->child(appearance->childCount()-1); }
    }else if(INFO[i].category=="session"  && session->childCount()>0 ){ 
      if( session->child( session->childCount()-1)->text(1).isEmpty() ){ lastIt = session->child(session->childCount()-1); }
    }else if(INFO[i].category=="user"  && user->childCount()>0 ){ 
      if( user->child( user->childCount()-1)->text(1).isEmpty() ){ lastIt = user->child(user->childCount()-1); }
    }
    if(lastIt==0){ lastIt = new QTreeWidgetItem();  col = 0;}
    else{ col = 1; }
    lastIt->setIcon(col, LXDG::findIcon(INFO[i].icon,"") );
    lastIt->setText(col, INFO[i].name);
    lastIt->setStatusTip(col, INFO[i].comment);
    lastIt->setToolTip(col, INFO[i].comment);
    lastIt->setWhatsThis(col, INFO[i].id);
    if(col==0){
      if(INFO[i].category=="interface"){ interface->addChild(lastIt); }
      else if(INFO[i].category=="appearance"){ appearance->addChild(lastIt); }
      else if(INFO[i].category=="session"){ session->addChild(lastIt); }
      else if(INFO[i].category=="user"){ user->addChild(lastIt); }
      else{ ui->treeWidget->addTopLevelItem(lastIt); }
    }
  }
  //Now add the categories to the tree widget if they are non-empty
  if(interface->childCount()>0){ ui->treeWidget->addTopLevelItem(interface); interface->setExpanded(true); }
  if(appearance->childCount()>0){ ui->treeWidget->addTopLevelItem(appearance); appearance->setExpanded(true); }
  if(session->childCount()>0){ ui->treeWidget->addTopLevelItem(session); session->setExpanded(true); }
  if(user->childCount()>0){ ui->treeWidget->addTopLevelItem(user); user->setExpanded(true); }
  ui->treeWidget->sortItems(0, Qt::AscendingOrder);
  ui->treeWidget->resizeColumnToContents(0);
  ui->treeWidget->resizeColumnToContents(1);
}

//================
//    PUBLIC SLOTS
//================
void page_main::SaveSettings(){

}

void page_main::clearlineEdit(){
  ui->lineEdit->clear();
  ui->treeWidget->sortItems(0, Qt::AscendingOrder);
  ui->treeWidget->resizeColumnToContents(0);
  ui->treeWidget->resizeColumnToContents(1);
}


void page_main::LoadSettings(int){
  emit HasPendingChanges(false);
  emit ChangePageTitle( tr("Desktop Settings") );
  INFO.clear();
  INFO = KnownPages();
  UpdateItems("");
  ui->lineEdit->setFocus();
}

void page_main::updateIcons(){
  UpdateItems("");
}

//=================
//    PRIVATE SLOTS
//=================
void page_main::showFind(){
  ui->lineEdit->setFocus();
  ui->treeWidget->setCurrentItem(0);
}

void page_main::itemTriggered(QTreeWidgetItem *it, int col){
  if(it->childCount()>0){
    it->setExpanded( !it->isExpanded() ); 
    it->setSelected(false);
  }else if(!it->whatsThis(col).isEmpty()){
    emit ChangePage(it->whatsThis(col));
  }else{
   it->setSelected(false);
  }
}

void page_main::searchChanged(QString txt){
  UpdateItems(txt.simplified());
}