#include "vsearchresulttree.h"

#include <QAction>
#include <QMenu>

#include "utils/vutils.h"
#include "utils/viconutils.h"
#include "vnote.h"
#include "vmainwindow.h"
#include "vnotefile.h"
#include "vcart.h"
#include "vhistorylist.h"
#include "vexplorer.h"
#include "vuniversalentry.h"
#include "vsearchue.h"
#include "vconstants.h"

extern VNote *g_vnote;

extern VMainWindow *g_mainWin;

VSearchResultTree::VSearchResultTree(QWidget *p_parent)
    : VTreeWidget(p_parent)
{
    setColumnCount(1);
    setHeaderHidden(true);
    setExpandsOnDoubleClick(false);
    setContextMenuPolicy(Qt::CustomContextMenu);
    setSelectionMode(QAbstractItemView::ExtendedSelection);

    setSimpleSearchMatchFlags(getSimpleSearchMatchFlags() & ~Qt::MatchRecursive);

    m_noteIcon = VIconUtils::treeViewIcon(":/resources/icons/note_item.svg");
    m_folderIcon = VIconUtils::treeViewIcon(":/resources/icons/dir_item.svg");
    m_notebookIcon = VIconUtils::treeViewIcon(":/resources/icons/notebook_item.svg");

    connect(this, &VTreeWidget::itemActivated,
            this, &VSearchResultTree::activateItem);
    connect(this, &VTreeWidget::customContextMenuRequested,
            this, &VSearchResultTree::handleContextMenuRequested);
}

void VSearchResultTree::updateResults(const QList<QSharedPointer<VSearchResultItem> > &p_items)
{
    clearResults();

    for (auto const & it : p_items) {
        appendItem(it);
    }

    emit countChanged(topLevelItemCount());
}

void VSearchResultTree::addResultItem(const QSharedPointer<VSearchResultItem> &p_item)
{
    appendItem(p_item);

    emit countChanged(topLevelItemCount());
}

void VSearchResultTree::addResultItems(const QList<QSharedPointer<VSearchResultItem> > &p_items)
{
    for (auto const & it : p_items) {
        appendItem(it);
    }

    emit countChanged(topLevelItemCount());
}

void VSearchResultTree::clearResults()
{
    clearAll();

    m_data.clear();

    emit countChanged(topLevelItemCount());
}

void VSearchResultTree::appendItem(const QSharedPointer<VSearchResultItem> &p_item)
{
    m_data.append(p_item);

    QTreeWidgetItem *item = new QTreeWidgetItem(this);
    item->setData(0, Qt::UserRole, m_data.size() - 1);
    QString text;
    if (p_item->m_text.isEmpty()) {
        text = p_item->m_path;
    } else if (p_item->m_type != VSearchResultItem::Notebook) {
        text = VUniversalEntry::fileNameWithDir(p_item->m_text, p_item->m_path);
    } else {
        text = p_item->m_text;
    }
    item->setText(0, text);
    item->setToolTip(0, p_item->m_path);

    switch (p_item->m_type) {
    case VSearchResultItem::Note:
        item->setIcon(0, m_noteIcon);
        break;

    case VSearchResultItem::Folder:
        item->setIcon(0, m_folderIcon);
        break;

    case VSearchResultItem::Notebook:
        item->setIcon(0, m_notebookIcon);
        break;

    default:
        break;
    }

    for (auto const & it: p_item->m_matches) {
        QTreeWidgetItem *subItem = new QTreeWidgetItem(item);
        QString text;
        if (it.m_lineNumber > -1) {
            text = QString("[%1] %2").arg(it.m_lineNumber).arg(it.m_text);
        } else {
            text = it.m_text;
        }

        subItem->setText(0, text);
        subItem->setToolTip(0, it.m_text);
    }
}

void VSearchResultTree::handleContextMenuRequested(QPoint p_pos)
{
    QMenu menu(this);
    menu.setToolTipsVisible(true);

    QTreeWidgetItem *item = itemAt(p_pos);
    if (!item) {
        goto global;
    }

    {
    QList<QTreeWidgetItem *> items = selectedItems();

    bool hasNote = false;
    for (auto const & it : items) {
        if (itemResultType(it) == VSearchResultItem::Note) {
            hasNote = true;
            break;
        }
    }

    if (items.size() == 1) {
        QAction *openAct = new QAction(tr("&Open"), &menu);
        openAct->setToolTip(tr("Open selected notes"));
        connect(openAct, &QAction::triggered,
                this, [this]() {
                    activateItem(currentItem());
                });
        menu.addAction(openAct);

        if (hasNote) {
            QAction *locateAct = new QAction(VIconUtils::menuIcon(":/resources/icons/locate_note.svg"),
                                             tr("&Locate To Folder"),
                                             &menu);
            locateAct->setToolTip(tr("Locate the folder of current note"));
            connect(locateAct, &QAction::triggered,
                    this, &VSearchResultTree::locateCurrentItem);
            menu.addAction(locateAct);
        }
    }

    if (hasNote) {
        QAction *addToCartAct = new QAction(VIconUtils::menuIcon(":/resources/icons/cart.svg"),
                                            tr("Add To Cart"),
                                            &menu);
        addToCartAct->setToolTip(tr("Add selected notes to Cart for further processing"));
        connect(addToCartAct, &QAction::triggered,
                this, &VSearchResultTree::addSelectedItemsToCart);
        menu.addAction(addToCartAct);

        QAction *pinToHistoryAct = new QAction(VIconUtils::menuIcon(":/resources/icons/pin.svg"),
                                               tr("Pin To History"),
                                               &menu);
        pinToHistoryAct->setToolTip(tr("Pin selected notes to History"));
        connect(pinToHistoryAct, &QAction::triggered,
                this, &VSearchResultTree::pinSelectedItemsToHistory);
        menu.addAction(pinToHistoryAct);
    }
    }

global:
    if (topLevelItemCount() > 0) {
        if (item) {
            menu.addSeparator();
        }

        QString shortcutText = VUtils::getShortcutText(Shortcut::c_expand);
        QAction *expandAct = new QAction(tr("Expand/Collapse All\t%1").arg(shortcutText),
                                         &menu);
        connect(expandAct, &QAction::triggered,
                this, &VSearchResultTree::expandCollapseAll);
        menu.addAction(expandAct);

        menu.exec(mapToGlobal(p_pos));
    }
}

void VSearchResultTree::locateCurrentItem()
{
    auto item =  currentItem();
    if (!item) {
        return;
    }

    const QSharedPointer<VSearchResultItem> &resItem = itemResultData(item);
    if (resItem->m_type == VSearchResultItem::Note) {
        VFile *file = g_vnote->getInternalFile(resItem->m_path);
        if (file) {
            g_mainWin->locateFile(file);
        }
    }
}

void VSearchResultTree::addSelectedItemsToCart()
{
    QList<QTreeWidgetItem *> items = selectedItems();
    VCart *cart = g_mainWin->getCart();

    int nrAdded = 0;
    for (int i = 0; i < items.size(); ++i) {
        const QSharedPointer<VSearchResultItem> &resItem = itemResultData(items[i]);
        if (resItem->m_type == VSearchResultItem::Note) {
            cart->addFile(resItem->m_path);
            ++nrAdded;
        }
    }

    if (nrAdded) {
        g_mainWin->showStatusMessage(tr("%1 %2 added to Cart")
                                       .arg(nrAdded)
                                       .arg(nrAdded > 1 ? tr("notes") : tr("note")));
    }
}

void VSearchResultTree::pinSelectedItemsToHistory()
{
    QList<QTreeWidgetItem *> items = selectedItems();
    QStringList files;
    for (int i = 0; i < items.size(); ++i) {
        const QSharedPointer<VSearchResultItem> &resItem = itemResultData(items[i]);
        if (resItem->m_type == VSearchResultItem::Note) {
            files << resItem->m_path;
        }
    }

    if (!files.isEmpty()) {
        g_mainWin->getHistoryList()->pinFiles(files);
        g_mainWin->showStatusMessage(tr("%1 %2 pinned to History")
                                       .arg(files.size())
                                       .arg(files.size() > 1 ? tr("notes") : tr("note")));
    }
}

VSearchResultItem::ItemType VSearchResultTree::itemResultType(const QTreeWidgetItem *p_item) const
{
    Q_ASSERT(p_item);
    return itemResultData(p_item)->m_type;
}

const QSharedPointer<VSearchResultItem> &VSearchResultTree::itemResultData(const QTreeWidgetItem *p_item) const
{
    Q_ASSERT(p_item);
    const QTreeWidgetItem *topItem = VTreeWidget::topLevelTreeItem(p_item);
    int idx = topItem->data(0, Qt::UserRole).toInt();
    Q_ASSERT(idx >= 0 && idx < m_data.size());
    return m_data[idx];
}

void VSearchResultTree::activateItem(const QTreeWidgetItem *p_item) const
{
    if (!p_item) {
        return;
    }

    VSearchUE::activateItem(itemResultData(p_item), VTreeWidget::childIndexOfTreeItem(p_item));
}

void VSearchResultTree::expandCollapseAll()
{
    VTreeWidget::expandCollapseAll(this);
}