/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <LibGUI/Button.h>
#include <LibGUI/TextBox.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Event.h>
#include <LibWeb/HTML/HTMLFormElement.h>
#include <LibWeb/HTML/HTMLInputElement.h>
#include <LibWeb/InProcessWebView.h>
#include <LibWeb/Layout/LayoutButton.h>
#include <LibWeb/Layout/LayoutCheckBox.h>
#include <LibWeb/Layout/LayoutWidget.h>
#include <LibWeb/Page/Frame.h>

namespace Web::HTML {

HTMLInputElement::HTMLInputElement(DOM::Document& document, const QualifiedName& qualified_name)
    : HTMLElement(document, qualified_name)
{
}

HTMLInputElement::~HTMLInputElement()
{
}

void HTMLInputElement::did_click_button(Badge<LayoutButton>)
{
    dispatch_event(DOM::Event::create("click"));

    if (type().equals_ignoring_case("submit")) {
        if (auto* form = first_ancestor_of_type<HTMLFormElement>()) {
            // FIXME: Remove this const_cast once we have a non-const first_ancestor_of_type.
            form->submit(this);
        }
        return;
    }
}

RefPtr<LayoutNode> HTMLInputElement::create_layout_node(const CSS::StyleProperties* parent_style)
{
    ASSERT(document().page());
    auto& page = *document().page();
    auto& page_view = const_cast<InProcessWebView&>(static_cast<const InProcessWebView&>(page.client()));

    if (type() == "hidden")
        return nullptr;

    auto style = document().style_resolver().resolve_style(*this, parent_style);
    if (style->display() == CSS::Display::None)
        return nullptr;

    if (type().equals_ignoring_case("submit") || type().equals_ignoring_case("button"))
        return adopt(*new LayoutButton(document(), *this, move(style)));

    if (type() == "checkbox")
        return adopt(*new LayoutCheckBox(document(), *this, move(style)));

    auto& text_box = page_view.add<GUI::TextBox>();
    text_box.set_text(value());
    text_box.on_change = [this] {
        auto& widget = downcast<LayoutWidget>(layout_node())->widget();
        const_cast<HTMLInputElement*>(this)->set_attribute(HTML::AttributeNames::value, static_cast<const GUI::TextBox&>(widget).text());
    };
    int text_width = Gfx::Font::default_font().width(value());
    auto size_value = attribute(HTML::AttributeNames::size);
    if (!size_value.is_null()) {
        auto size = size_value.to_uint();
        if (size.has_value())
            text_width = Gfx::Font::default_font().glyph_width('x') * size.value();
    }
    text_box.set_relative_rect(0, 0, text_width + 20, 20);
    return adopt(*new LayoutWidget(document(), *this, text_box));
}

void HTMLInputElement::set_checked(bool checked)
{
    if (m_checked == checked)
        return;
    m_checked = checked;
    if (layout_node())
        layout_node()->set_needs_display();

    dispatch_event(DOM::Event::create("change"));
}

bool HTMLInputElement::enabled() const
{
    return !has_attribute(HTML::AttributeNames::disabled);
}

}
