#include "PdfPagesDialog.h"

#include "gui/Shadow.h"
#include "model/Document.h"

#include "PdfElementView.h"
#include "Util.h"
#include "i18n.h"


PdfPagesDialog::PdfPagesDialog(GladeSearchpath* gladeSearchPath, Document* doc, Settings* settings):
        BackgroundSelectDialogBase(gladeSearchPath, doc, settings, "pdfpages.glade", "pdfPagesDialog") {
    for (size_t i = 0; i < doc->getPdfPageCount(); i++) {
        XojPdfPageSPtr p = doc->getPdfPage(i);
        auto* pv = new PdfElementView(elements.size(), p, this);
        elements.push_back(pv);
    }
    if (doc->getPdfPageCount() > 0) {
        setSelected(0);
    }

    for (size_t i = 0; i < doc->getPageCount(); i++) {
        PageRef p = doc->getPage(i);

        if (p->getBackgroundType().isPdfPage()) {
            int pdfPage = p->getPdfPageNr();
            if (pdfPage >= 0 && pdfPage < static_cast<int>(elements.size())) {
                (dynamic_cast<PdfElementView*>(elements[p->getPdfPageNr()]))->setUsed(true);
            }
        }
    }

    updateOkButton();

    g_signal_connect(get("cbOnlyNotUsed"), "toggled", G_CALLBACK(onlyNotUsedCallback), this);
    g_signal_connect(get("buttonOk"), "clicked", G_CALLBACK(okButtonCallback), this);
}

PdfPagesDialog::~PdfPagesDialog() = default;

void PdfPagesDialog::updateOkButton() {
    bool valid = false;
    if (selected >= 0 && selected < static_cast<int>(elements.size())) {
        BaseElementView* p = this->elements[this->selected];
        valid = gtk_widget_get_visible(p->getWidget());
    }

    gtk_widget_set_sensitive(get("buttonOk"), valid);
}

void PdfPagesDialog::okButtonCallback(GtkButton* button, PdfPagesDialog* dlg) { dlg->confirmed = true; }

void PdfPagesDialog::onlyNotUsedCallback(GtkToggleButton* tb, PdfPagesDialog* dlg) {
    if (gtk_toggle_button_get_active(tb)) {
        for (BaseElementView* p: dlg->elements) {
            auto* pv = dynamic_cast<PdfElementView*>(p);
            pv->setHideUnused();
        }
    } else {
        gtk_widget_show_all(dlg->scrollPreview);
    }

    dlg->layout();
    dlg->updateOkButton();
}

auto PdfPagesDialog::getZoom() -> double { return 0.25; }

auto PdfPagesDialog::getSelectedPage() -> int {
    if (confirmed) {
        return this->selected;
    }

    return -1;
}

void PdfPagesDialog::show(GtkWindow* parent) {
    GtkWidget* w = get("cbOnlyNotUsed");

    int unused = 0;
    for (BaseElementView* p: elements) {
        auto* pv = dynamic_cast<PdfElementView*>(p);
        if (!pv->isUsed()) {
            unused++;
        }
    }

    gtk_button_set_label(GTK_BUTTON(w), (unused == 1 ? _("Show only not used pages (one unused page)") :
                                                       FC(_F("Show only not used pages ({1} unused pages)") % unused)));

    BackgroundSelectDialogBase::show(parent);
}