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/*
 * Copyright (c) 2010-2016 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Swift/QtUI/ChatList/ChatListModel.h>

#include <QMimeData>
#include <QUrl>

#include <Swift/QtUI/ChatList/ChatListMUCItem.h>
#include <Swift/QtUI/ChatList/ChatListRecentItem.h>
#include <Swift/QtUI/ChatList/ChatListWhiteboardItem.h>
#include <Swift/QtUI/QtSwiftUtil.h>

namespace Swift {

ChatListModel::ChatListModel() : whiteboards_(nullptr) {
    root_ = new ChatListGroupItem("", nullptr, false);
    mucBookmarks_ = new ChatListGroupItem(tr("Bookmarked Rooms"), root_);
    recents_ = new ChatListGroupItem(tr("Recent Chats"), root_, false);
#ifdef SWIFT_EXPERIMENTAL_WB
    whiteboards_ = new ChatListGroupItem(tr("Opened Whiteboards"), root_, false);
    root_->addItem(whiteboards_);
#endif

    root_->addItem(recents_);
    root_->addItem(mucBookmarks_);

    QModelIndex idx = index(0, 0, QModelIndex());
    while (idx.isValid()) {
        if (idx.internalPointer() == mucBookmarks_) {
            mucBookmarksIndex_ = idx;
        } else if (idx.internalPointer() == recents_) {
            recentsIndex_ = idx;
        } else if (idx.internalPointer() == whiteboards_) {
            whiteboardsIndex_ = idx;
        }
        idx = index(idx.row() + 1, 0, QModelIndex());
    }
}

Qt::ItemFlags ChatListModel::flags(const QModelIndex& index) const {
    Qt::ItemFlags flags = QAbstractItemModel::flags(index);
    if (dynamic_cast<ChatListRecentItem*>(getItemForIndex(index))) {
        flags |= Qt::ItemIsDragEnabled;
    }
    return flags;
}

void ChatListModel::clearBookmarks() {
    beginRemoveRows(mucBookmarksIndex_, 0, mucBookmarks_->rowCount());
    mucBookmarks_->clear();
    endRemoveRows();
}

void ChatListModel::addMUCBookmark(const Swift::MUCBookmark& bookmark) {
    beginInsertRows(mucBookmarksIndex_, 0, mucBookmarks_->rowCount());
    mucBookmarks_->addItem(new ChatListMUCItem(bookmark, mucBookmarks_));
    endInsertRows();
}

void ChatListModel::removeMUCBookmark(const Swift::MUCBookmark& bookmark) {
    for (int i = 0; i < mucBookmarks_->rowCount(); i++) {
        ChatListMUCItem* item = dynamic_cast<ChatListMUCItem*>(mucBookmarks_->item(i));
        if (item->getBookmark() == bookmark) {
            beginRemoveRows(mucBookmarksIndex_, i, i+1);
            mucBookmarks_->remove(i);
            endRemoveRows();
            break;
        }
    }
}

void ChatListModel::addWhiteboardSession(const ChatListWindow::Chat& chat) {
    beginInsertRows(whiteboardsIndex_, 0, whiteboards_->rowCount());
    whiteboards_->addItem(new ChatListWhiteboardItem(chat, whiteboards_));
    endInsertRows();
}

void ChatListModel::removeWhiteboardSession(const JID& jid) {
    for (int i = 0; i < whiteboards_->rowCount(); i++) {
        ChatListWhiteboardItem* item = dynamic_cast<ChatListWhiteboardItem*>(whiteboards_->item(i));
        if (item->getChat().jid == jid) {
            beginRemoveRows(whiteboardsIndex_, i, i+1);
            whiteboards_->remove(i);
            endRemoveRows();
            break;
        }
    }
}

void ChatListModel::setRecents(const std::list<ChatListWindow::Chat>& recents) {
    beginRemoveRows(recentsIndex_, 0, recents_->rowCount());
    recents_->clear();
    endRemoveRows();
    beginInsertRows(recentsIndex_, 0, recents.size());
    for (const auto& chat : recents) {
        recents_->addItem(new ChatListRecentItem(chat, recents_));
//whiteboards_->addItem(new ChatListRecentItem(chat, whiteboards_));
    }
    endInsertRows();
}

QMimeData* ChatListModel::mimeData(const QModelIndexList& indexes) const {
    QMimeData* data = QAbstractItemModel::mimeData(indexes);
    ChatListRecentItem *item = dynamic_cast<ChatListRecentItem*>(getItemForIndex(indexes.first()));
    if (item == nullptr) {
        return data;
    }

    QByteArray itemData;
    QDataStream dataStream(&itemData, QIODevice::WriteOnly);
    const ChatListWindow::Chat& chat = item->getChat();

    QString mimeType = "application/vnd.swift.contact-jid-list";
    if (!chat.impromptuJIDs.size()) {
        if (chat.isMUC) {
            mimeType = "application/vnd.swift.contact-jid-muc";
        }
        dataStream << P2QSTRING(chat.jid.toString());
    } else {
         for (const auto& jid : chat.impromptuJIDs) {
            dataStream << P2QSTRING(jid.second.toString());
        }
    }

    data->setData(mimeType, itemData);
    return data;
}

const ChatListMUCItem* ChatListModel::getChatListMUCItem(const JID& roomJID) const {
    const ChatListMUCItem* mucItem = nullptr;
    for (int i = 0; i < mucBookmarks_->rowCount(); i++) {
        ChatListMUCItem* item = dynamic_cast<ChatListMUCItem*>(mucBookmarks_->item(i));
        if (item->getBookmark().getRoom() == roomJID) {
            mucItem = item;
            break;
        }
    }
    return mucItem;
}

int ChatListModel::columnCount(const QModelIndex& /*parent*/) const {
    return 1;
}

ChatListItem* ChatListModel::getItemForIndex(const QModelIndex& index) const {
    return index.isValid() ? static_cast<ChatListItem*>(index.internalPointer()) : nullptr;
}

QVariant ChatListModel::data(const QModelIndex& index, int role) const {
    ChatListItem* item = getItemForIndex(index);
    return item ? item->data(role) : QVariant();
}

QModelIndex ChatListModel::index(int row, int column, const QModelIndex & parent) const {
    if (!hasIndex(row, column, parent)) {
        return QModelIndex();
    }

    ChatListGroupItem *parentItem = parent.isValid() ? static_cast<ChatListGroupItem*>(parent.internalPointer()) : root_;

    return row < parentItem->rowCount() ? createIndex(row, column, parentItem->item(row)) : QModelIndex();
}

QModelIndex ChatListModel::parent(const QModelIndex& index) const {
    if (!index.isValid()) {
        return QModelIndex();
    }
    ChatListGroupItem* parent = static_cast<ChatListGroupItem*>(index.internalPointer())->parent();
    return (parent == root_) ? QModelIndex() : createIndex(parent->parent()->row(parent), 0, parent);
}

int ChatListModel::rowCount(const QModelIndex& parentIndex) const {
    ChatListGroupItem* parent = nullptr;
    if (parentIndex.isValid()) {
        parent = dynamic_cast<ChatListGroupItem*>(static_cast<ChatListItem*>(parentIndex.internalPointer()));
    } else {
        parent = root_;
    }
    int count = (parent ? parent->rowCount() : 0);
    return count;
}

}