#include "SpinPageAdapter.h"

SpinPageAdapter::SpinPageAdapter() {
    this->lastTimeoutId = 0;
    this->widget = gtk_spin_button_new_with_range(0, 0, 1);
    g_object_ref(this->widget);

    g_signal_connect(this->widget, "value-changed", G_CALLBACK(pageNrSpinChangedCallback), this);

    this->page = -1;
}

SpinPageAdapter::~SpinPageAdapter() {
    g_object_unref(this->widget);
    this->widget = nullptr;
}

auto SpinPageAdapter::pageNrSpinChangedTimerCallback(SpinPageAdapter* adapter) -> bool {
    adapter->lastTimeoutId = 0;
    adapter->page = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(adapter->widget));

    adapter->firePageChanged();
    return false;
}

void SpinPageAdapter::pageNrSpinChangedCallback(GtkSpinButton* spinbutton, SpinPageAdapter* adapter) {
    // Nothing changed.
    if (gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(spinbutton)) == static_cast<uint64_t>(adapter->page)) {
        return;
    }

    if (adapter->lastTimeoutId) {
        g_source_remove(adapter->lastTimeoutId);
    }

    // Give the spin button some time to realease, if we don't do he will send new events...
    adapter->lastTimeoutId = g_timeout_add(100, reinterpret_cast<GSourceFunc>(pageNrSpinChangedTimerCallback), adapter);
}

auto SpinPageAdapter::getWidget() -> GtkWidget* { return this->widget; }

auto SpinPageAdapter::getPage() const -> int { return this->page; }

void SpinPageAdapter::setPage(size_t page) {
    this->page = page;
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(this->widget), page);
}

void SpinPageAdapter::setMinMaxPage(size_t min, size_t max) {
    gtk_spin_button_set_range(GTK_SPIN_BUTTON(this->widget), min, max);
}

void SpinPageAdapter::addListener(SpinPageListener* listener) { this->listener.push_back(listener); }

void SpinPageAdapter::removeListener(SpinPageListener* listener) { this->listener.remove(listener); }

void SpinPageAdapter::firePageChanged() {
    for (SpinPageListener* listener: this->listener) {
        listener->pageChanged(this->page);
    }
}

SpinPageListener::~SpinPageListener() = default;