/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include "AllMasterPagesSelector.hxx"
#include <ViewShellBase.hxx>
#include "MasterPageContainer.hxx"
#include "MasterPageDescriptor.hxx"
#include <helpids.h>

#include <set>

namespace {

using namespace sd::sidebar;

int GetURLPriority (const SharedMasterPageDescriptor& rpDescriptor)
{
    int nPriority (0);
    switch (rpDescriptor->GetURLClassification())
    {
        case MasterPageDescriptor::URLCLASS_USER:         nPriority = 0; break;
        case MasterPageDescriptor::URLCLASS_LAYOUT:       nPriority = 1; break;
        case MasterPageDescriptor::URLCLASS_PRESENTATION: nPriority = 2; break;
        case MasterPageDescriptor::URLCLASS_OTHER:        nPriority = 3; break;
        case MasterPageDescriptor::URLCLASS_UNKNOWN:      nPriority = 4; break;
        default:
        case MasterPageDescriptor::URLCLASS_UNDETERMINED: nPriority = 5; break;
    }
    return nPriority;
}

class MasterPageDescriptorOrder
{
public:
    bool operator() (
        const SharedMasterPageDescriptor& rp1,
        const SharedMasterPageDescriptor& rp2) const
    {
        if (rp1->meOrigin == MasterPageContainer::DEFAULT)
            return true;
        else if (rp2->meOrigin == MasterPageContainer::DEFAULT)
            return false;
        else if (rp1->GetURLClassification() == rp2->GetURLClassification())
            return rp1->mnTemplateIndex < rp2->mnTemplateIndex;
        else
            return GetURLPriority(rp1) < GetURLPriority(rp2);
    }
};

} // end of anonymous namespace

namespace sd::sidebar {

class AllMasterPagesSelector::SortedMasterPageDescriptorList
    : public ::std::set<SharedMasterPageDescriptor,MasterPageDescriptorOrder>
{
public:
    SortedMasterPageDescriptorList() {}
};

VclPtr<vcl::Window> AllMasterPagesSelector::Create (
    vcl::Window* pParent,
    ViewShellBase& rViewShellBase,
    const css::uno::Reference<css::ui::XSidebar>& rxSidebar)
{
    SdDrawDocument* pDocument = rViewShellBase.GetDocument();
    if (pDocument == nullptr)
        return nullptr;

    auto pContainer = std::make_shared<MasterPageContainer>();

    VclPtrInstance<AllMasterPagesSelector> pSelector(
            pParent,
            *pDocument,
            rViewShellBase,
            pContainer,
            rxSidebar);
    pSelector->LateInit();
    pSelector->SetHelpId(HID_SD_TASK_PANE_PREVIEW_ALL);

    return pSelector;
}

AllMasterPagesSelector::AllMasterPagesSelector (
    vcl::Window* pParent,
    SdDrawDocument& rDocument,
    ViewShellBase& rBase,
    const std::shared_ptr<MasterPageContainer>& rpContainer,
    const css::uno::Reference<css::ui::XSidebar>& rxSidebar)
    : MasterPagesSelector(pParent, rDocument, rBase, rpContainer, rxSidebar),
      mpSortedMasterPages(new SortedMasterPageDescriptorList())
{
    MasterPagesSelector::Fill();
}

AllMasterPagesSelector::~AllMasterPagesSelector()
{
}

void AllMasterPagesSelector::Fill (ItemList& rItemList)
{
    if (mpSortedMasterPages->empty())
        UpdateMasterPageList();
    UpdatePageSet(rItemList);
}

void AllMasterPagesSelector::NotifyContainerChangeEvent (
    const MasterPageContainerChangeEvent& rEvent)
{
    switch (rEvent.meEventType)
    {
        case MasterPageContainerChangeEvent::EventType::CHILD_ADDED:
            AddItem(rEvent.maChildToken);
            MasterPagesSelector::Fill();
            break;

        case MasterPageContainerChangeEvent::EventType::INDEX_CHANGED:
            mpSortedMasterPages->clear();
            MasterPagesSelector::Fill();
            break;

        default:
            MasterPagesSelector::NotifyContainerChangeEvent(rEvent);
            break;
    }
}

void AllMasterPagesSelector::UpdateMasterPageList()
{
    mpSortedMasterPages->clear();
    int nTokenCount = mpContainer->GetTokenCount();
    for (int i=0; i<nTokenCount; i++)
        AddItem(mpContainer->GetTokenForIndex(i));
}

void AllMasterPagesSelector::AddItem (MasterPageContainer::Token aToken)
{
    switch (mpContainer->GetOriginForToken(aToken))
    {
        case MasterPageContainer::DEFAULT:
        case MasterPageContainer::TEMPLATE:
            // Templates are added only when coming from the
            // MasterPageContainerFiller so that they have an id which
            // defines their place in the list.  Templates (pre) loaded from
            // RecentlyUsedMasterPages are ignored (they will be loaded
            // later by the MasterPageContainerFiller.)
            if (mpContainer->GetTemplateIndexForToken(aToken) >= 0)
                mpSortedMasterPages->insert(mpContainer->GetDescriptorForToken(aToken));
            break;

        default:
            break;
    }
}

void AllMasterPagesSelector::UpdatePageSet (ItemList& rItemList)
{
    for (const auto& rxDescriptor : *mpSortedMasterPages)
        rItemList.push_back(rxDescriptor->maToken);
}

} // end of namespace sd::sidebar

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