#include "CopyUndoAction.h"

#include "control/Control.h"
#include "gui/XournalppCursor.h"
#include "model/PageRef.h"

#include "i18n.h"

CopyUndoAction::CopyUndoAction(const PageRef& pageref, int pageNr): UndoAction("CopyUndoAction") {
    this->page = pageref;
    this->pageNr = pageNr;
}

CopyUndoAction::~CopyUndoAction() { this->page = nullptr; }

auto CopyUndoAction::undo(Control* control) -> bool {
    Document* doc = control->getDocument();

    // in order to fix the hang, we need to get out
    // of text mode
    // ***This might kill whatever we've got selected
    control->clearSelectionEndText();

    // first send event, then delete page...
    // we need to unlock the document from UndoRedoHandler
    // because firePageDeleted is threadsafe.
    doc->unlock();
    control->firePageDeleted(pageNr);
    doc->lock();
    doc->deletePage(pageNr);

    control->updateDeletePageButton();

    return true;
}

auto CopyUndoAction::redo(Control* control) -> bool {
    Document* doc = control->getDocument();

    // just in case there would be a hang here,
    // we'll clear the selection in redo as well
    control->clearSelectionEndText();

    // see deletePage for why this is done
    // doc->lock();
    doc->insertPage(this->page, this->pageNr);
    doc->unlock();

    // these are all threadsafe (I think...)
    control->firePageInserted(this->pageNr);
    control->getCursor()->updateCursor();
    control->getScrollHandler()->scrollToPage(this->pageNr);
    control->updateDeletePageButton();

    // this prevents the double unlock
    doc->lock();
    return true;
}

auto CopyUndoAction::getText() -> string { return _("Copy page"); }