/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: CalenDayViewWidget implementation

*

*/

// System includes

#include <QStandardItemModel>

#include <QGraphicsSceneEvent>

#include <hbi18ndef.h>

#include <hbextendedlocale.h>

#include <hbgroupbox.h>

#include <hbmenu.h>

#include <hbaction.h>

#include <hbmainwindow.h>

#include <hbstyleloader.h>

#include <hbdatetimepicker.h>

#include <hbdialog.h>

#include <agendautil.h>

#include <noteseditor.h>

// User includes

#include "calendayviewwidget.h"

#include "calencommon.h"

#include "calendayview.h"

#include "calendocloader.h"

#include "calenservices.h"

#include "calencontext.h"

#include "calendateutils.h"

#include "CalenUid.h"

#include "caleneventlistviewitem.h"

// Constants

static const QString singleSpace(" ");

static const QString newLine("\n");

static const QString customLayout("custom");

static const char *stretchLayout("stretchItem");

// TODO: Replace with actual image names later

static const QString toDoIcon("qtg_small_todo");

static const QString reminderIcon("qtg_mono_alarm");

static const QString locationIcon("qtg_mono_location");

static const QString repeatIcon("qtg_mono_repeat");

static const QString allDayIcon(":/qgn_indi_cdr_meeting_layer0.svg");

static const QString exceptionIcon(":/qtg_mono_exception.png");

static const int singleColumn(1);

// ----------------------------------------------------------------------------

// CalenDayViewWidget::CalenDayViewWidget

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//

CalenDayViewWidget::CalenDayViewWidget(MCalenServices &services,

                                       CalenDocLoader *docLoader) :

mServices(services),

mDocLoader(docLoader)

{

    // Construct the list view prototype

    mListViewPrototype = new CalenEventListViewItem(this);

    // Create the list model

    mListModel = new QStandardItemModel(this);

    // Register the custom docml and css to provide our own style to the list items

    HbStyleLoader::registerFilePath(":/");

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::~CalenDayViewWidget

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//    

CalenDayViewWidget::~CalenDayViewWidget()

{

    if (mListViewPrototype) {

        delete mListViewPrototype;

        mListViewPrototype = NULL;

    }

    if (mListModel) {

        // Do not delete the model since its owned by the view

        mListModel->clear();

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::setupWidget

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//    

void CalenDayViewWidget::setupWidget(CalenDayView *view)

{

    // Store the view for future reference

	mView = view;

	if (!mDocLoader) {

	    // Nothing much can be done. Simply return

	    return;

	}

	// Initialize the child widgets

	initChildWidgets();

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::showWidget

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//

void CalenDayViewWidget::showWidget()

{

    // Get the date for which this view has been launched

    mDate = mServices.Context().focusDateAndTimeL();

    // Set the heading text

    setHeadingText();

    // Get the instance list

    getInstanceList();

    // Load the appropriate section based on the number of events for the day

    if (0 == mInstanceArray.count()) {

        // There are no entries for the day

        // Load and show the empty list section

        bool loadSuccess = false;

        // Hide the list which shows the events

        mEventsList->hide();

        // Show the empty list text

        mEmptyListLabel->show();

        // Get the current device orientation

        int orientation = mServices.MainWindow().orientation();

        if (Qt::Vertical == orientation) {

            mDocLoader->load(CALEN_DAYVIEW_XML_FILE, "emptyList", &loadSuccess);

        } else {

            mDocLoader->load(CALEN_DAYVIEW_XML_FILE, "emptyLandscape", &loadSuccess);

        }

        if (!loadSuccess) {

            qFatal("calendayviewwidget.cpp : Unable to load empty list section");

        }

    } else {

        // Hide the empty view label

        mEmptyListLabel->hide();

        // Show the events list

        mEventsList->show();

        // There are one or more events. Load the non-empty section

        bool loadSuccess = false;

        mDocLoader->load(CALEN_DAYVIEW_XML_FILE, "nonEmptyList", &loadSuccess);

        if (!loadSuccess) {

            qFatal("calendayviewwidget.cpp : Unable to load non-empty list section");

        }

        // Now populate the list with the events

        populateListWidget();

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::orientationChanged

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//

void CalenDayViewWidget::orientationChanged(Qt::Orientation orientation)

{

    // Load the appropriate section based on the number of events for the day

    if (0 == mInstanceArray.count()) {

        // There are no entries for the day

        // Load and show the empty list section

        bool loadSuccess = false;

        // Hide the list which shows the events

        mEventsList->hide();

        // Show the empty list text

        mEmptyListLabel->show();

        if (Qt::Vertical == orientation) {

            mDocLoader->load(CALEN_DAYVIEW_XML_FILE, "emptyList", &loadSuccess);

        } else {

            mDocLoader->load(CALEN_DAYVIEW_XML_FILE, "emptyLandscape", &loadSuccess);

        }

        if (!loadSuccess) {

            qFatal("calendayviewwidget.cpp : Unable to load empty list section");

        }

    } else {

        // Hide the empty view label

        mEmptyListLabel->hide();

        // Show the events list

        mEventsList->show();

        // There are one or more events. Load the non-empty section

        bool loadSuccess = false;

        mDocLoader->load(CALEN_DAYVIEW_XML_FILE, "nonEmptyList", &loadSuccess);

        if (!loadSuccess) {

            qFatal("calendayviewwidget.cpp : Unable to load non-empty list section");

        }

        handleListItemStretching(orientation);

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::handleLocaleChange

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//

void CalenDayViewWidget::handleLocaleChange()

{

    if(mListViewPrototype) {

        HbExtendedLocale locale = HbExtendedLocale::system();

        HbExtendedLocale::TimeStyle timeStyle = locale.timeStyle();

        if (HbExtendedLocale::Time12 == timeStyle) {

            mListViewPrototype->setTimeFormat12Hr(true);

        } else {

            mListViewPrototype->setTimeFormat12Hr(false);

        }

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::setContextFromHighlight

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//    

void CalenDayViewWidget::setContextFromHighlight(AgendaEntry entry)

{

    if (entry.isTimedEntry()) {

        // Timed entry.

        QDateTime start = entry.startTime();

        // start.setDate(mDate.date());

        mServices.Context().setFocusDateAndTimeAndInstanceL(start,

                                                            TCalenInstanceId::create(entry),

                                                            KCalenDayViewUidValue);

    } else {

        // Untimed entry.

        if (CalenDateUtils::onSameDay(TCalenInstanceId::create(entry).mInstanceTime,

                                      mDate)) {

            mServices.Context().setInstanceIdL(TCalenInstanceId::create(entry),

                                               KCalenDayViewUidValue);

        } else {

            // Multi-day untimed note (either multi-day day note or weird todo).

            // Focus on the instance and set the focus time to the highlighted day.

            mServices.Context().setFocusDateAndTimeAndInstanceL(mDate,

                                                                TCalenInstanceId::create(entry),

                                                                KCalenDayViewUidValue);

        }

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::initChildWidgets

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//

void CalenDayViewWidget::initChildWidgets()

{

    // Get the pointer to the events list

    mEventsList = static_cast<HbListView*> (mDocLoader->findWidget(CALEN_DAYVIEW_LISTWIDGET));

    if (!mEventsList) {

        qFatal("calendayviewwidget.cpp : Unable to find the events list");

    }

    // NOTE: Layout name MUST be same as the name mentioned in the css

    mEventsList->setLayoutName(customLayout);

    // TODO : remove this line after gestures are available

    mEventsList->installEventFilter(mView);

    // Connect to the long press and activation signals

    connect(mEventsList, SIGNAL(longPressed(HbAbstractViewItem*, const QPointF&)),

            this, SLOT(itemLongPressed(HbAbstractViewItem*, const QPointF&)));

    connect(mEventsList, SIGNAL(activated(const QModelIndex&)), this,

            SLOT(itemActivated(const QModelIndex&)));

    // Get the pointer to label from the loader.

    mHeadingLabel = qobject_cast<HbGroupBox*> (mDocLoader->findWidget(CALEN_DAYVIEW_HEADING));

    if (!mHeadingLabel) {

        qFatal("calendayviewwidget.cpp : Unable to find heading widget");

    }

    // Get the pointer to the empty view label

    mEmptyListLabel = qobject_cast<HbLabel*> (mDocLoader->findWidget("noEventsLabel"));

    if (!mEmptyListLabel) {

        qFatal("calendayviewwidget.cpp : Unable to find empty list label");

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::populateListWidget

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//    

void CalenDayViewWidget::populateListWidget()

{

    // Recycle the list items so that only needed rows

    // are added or removed

    if (mInstanceArray.count() == 0) {

        // Reset the list

        mEventsList->reset();

        // Clear the model to ensure it does not have any old items

        mListModel->clear();

        return;

    } else if (mInstanceArray.count() > mListModel->rowCount()) {

        // There are more events than the number of items

        // in the list. Add more rows

        mListModel->insertRows(0, mInstanceArray.count() - mListModel->rowCount());

    } else if (mInstanceArray.count() < mListModel->rowCount()) {

        // There are less number of events than the number

        // of items in the list. Remove the extra rows

        mListModel->removeRows(0, mListModel->rowCount() - mInstanceArray.count());

    }

    mListModel->setColumnCount(singleColumn);

    // Add all the events to the list

    for (int index = 0; index < mInstanceArray.count(); index++) {

        // Get each of the entry details

        AgendaEntry entry = mInstanceArray[index];

        // Create a list item for each entry

        createListItem(index, entry);

    }

    // Add the item on to the list widget

    mEventsList->setModel(mListModel, mListViewPrototype);

    // Now get the item to scroll to

    int scrollToIndex = getIndexToScrollTo();

    if (mListModel->rowCount() > 0) {

        // Scroll to the index only if index is valid

        mEventsList->scrollTo(mListModel->index(scrollToIndex, 0));

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::getInstanceList

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//    

void CalenDayViewWidget::getInstanceList()

{

    // Clear the previous instance list

    mInstanceArray.clear();

    // Check if the date is valid

    if (!CalenDateUtils::isValidDay(mDate)) {

        mDate = CalenDateUtils::today();

    }

    // Set the filter flags to fetch all relevant entries

    AgendaUtil::FilterFlags filter = AgendaUtil::FilterFlags(AgendaUtil::IncludeAnniversaries |

                                                             AgendaUtil::IncludeAppointments | 

                                                             AgendaUtil::IncludeEvents |

                                                             AgendaUtil::IncludeReminders |

                                                             AgendaUtil::IncludeIncompletedTodos);

    // Fetch the instance list from the agenda interface

    mInstanceArray = mServices.agendaInterface()->createEntryIdListForDay(mDate, filter);

    if (0 == mInstanceArray.count()) {

        // There are no events to populate

        // Hide the events list

        mEventsList->hide();

        // Show the empty list text

        mEmptyListLabel->show();

        // Inform the view about the change

        mView->hasEvents(false);

        return;

    } else {

        mView->hasEvents(true);

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::setDateToLabel

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//

void CalenDayViewWidget::setHeadingText()

    {

    // Format the date as per the device locale settings

	HbExtendedLocale systemLocale = HbExtendedLocale::system();

	// Get localised name of the day from locale

	QString dayString = systemLocale.dayName(mDate.date().dayOfWeek());

	// Append a single space

	dayString.append(singleSpace);

	// Set the heading

	// Append the date which is formatted as per the locale

	mHeadingLabel->setHeading(hbTrId(

				"txt_calendar_subhead_1_2").arg(dayString).arg(

				systemLocale.format(mDate.date(), r_qtn_date_usual_with_zero)));

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::createListItem

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//

void CalenDayViewWidget::createListItem(int index, AgendaEntry entry)

{

    if (index < 0 || entry.isNull()) {

        // Not a valid index or entry. Dont do anything

        return;

    }

    // Check if the entry is a timed entry

    // TODO: Right now, only appointment/meeting type is being handled

    // Handle other timed entry types like reminder etc

    if (entry.isTimedEntry()) {

        // Get the text and icon data for the entry

        addTimedEventToList(index, entry);

    } else {

        addNonTimedEventToList(index, entry);

    }

}

// ----------------------------------------------------------------------------

// CalenDayViewWidget::addTimedEventToList

// Rest of the details are commented in the header

// ----------------------------------------------------------------------------

//

void CalenDayViewWidget::addTimedEventToList(int index, AgendaEntry entry)

{

    // Create text and icon list to set to the model

    QVariantList textData;

    QVariantList iconData;

    bool twoLines = false;

    /**

     * IMPORTANT NOTE: All the text and icon items must be

     * inserted into the variant list in a specific order.

     * If not, chaos will set it!!!

     * On a more serious note, the mesh layout depends on the

     * fact that the icons and text data will be added in a

     * particular order. If one of the items go missing, the

     * layout might get messed up. Also in case a particular item

     * is not required to be added in the middle of the list, an

     * empty QVariant must be added to indicate to the list view

     * that the item must be removed from the layout.

     * Do not mess with the order in case you are not sure what

     * you are exactly doing.

     */

    // The first icon to show to-do or all day should not be shown

    // Append empty data to the icons list

    iconData << QVariant();

    // Check if alarm is enabled for the entry       

    if (entry.alarm().isNull()) {

        // Insert a blank icon. Else the next icon

        // will get replaced in this icon's position

        iconData << QVariant();

    } else {

        iconData << HbIcon(reminderIcon);

    }

    // Check if the entry is recurring

    if (entry.isRepeating()) {

        iconData << HbIcon(repeatIcon);

    } else if (!entry.recurrenceId().isNull()) {

        // This is an exceptional entry

        iconData << HbIcon(exceptionIcon);

    } else {

        // Insert a blank icon. Else the next icon

        // will get replaced in this icon's position

        iconData << QVariant();

    }

    HbExtendedLocale locale = HbExtendedLocale::system();

    // Get the start time and format as per the locale

    QTime eventStartTime = entry.startTime().time();

    QString eventTime = locale.format(eventStartTime, r_qtn_time_usual_with_zero);

    // Get the event end time

    QTime eventEndTime = entry.endTime().time();

    if (eventStartTime < eventEndTime) {

        // Raise the flag to indicate that the list item

        // would wrap to two lines

        twoLines = true;

        // Append '-' to indicate an end time is present

        eventTime.append("-");

        // Append new line to wrap to next line

        eventTime.append(newLine);

        // Event is a not a zero duration meeting

        // Only in this case, append the end time

        eventTime.append(locale.format(eventEndTime, r_qtn_time_usual_with_zero));

    } else {

        // Append new line to wrap to next line

        eventTime.append(newLine);

    }

    // Add the event time to the text list

    // This MUST be the first item to be added to the list 

    textData << eventTime;

    // Get the entry subject

    QString subject = entry.summary();

    if (subject.isEmpty() || subject.isNull()) {

        // No subject. Add "(No subject)" text

        subject.append(hbTrId("txt_calendar_dblist_unnamed"));

    }

    // Add the subject to the text list

    // This MUST be the second item in the list

    textData << subject;

    // Check if the entry has location

    // TODO: This must change to check for geo-location

    // This MUST be the third item in the list

    if (entry.location().isEmpty()) {

        // Insert a blank icon. Else the next icon

        // will get replaced in this icon's position

        iconData << QVariant();

        if (twoLines) {

            /**

             * NOTE: If the primary text is wrapping to two

             * lines, then the location must be set as blank

             * since the bottom of the list item is anchored to

             * the bottom of the secondary text. Else the bottom

             * of the list will overlap on the primary text