/*
 * Copyright (c) 2020, Hüseyin Aslıtürk <asliturk@hotmail.com>
 * 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 <LibCore/Timer.h>
#include <LibGUI/ColorInput.h>
#include <LibGUI/ColorPicker.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Palette.h>

namespace GUI {

ColorInput::ColorInput()
    : TextEditor(TextEditor::SingleLine)
{
    TextEditor::on_change = [this] {
        auto parsed_color = Color::from_string(text());
        if (parsed_color.has_value())
            set_color_without_changing_text(parsed_color.value());
    };
}

ColorInput::~ColorInput()
{
}

Gfx::Rect ColorInput::color_rect() const
{
    auto color_box_padding = 3;
    auto color_box_size = height() - color_box_padding - color_box_padding;
    return { width() - color_box_size - color_box_padding, color_box_padding, color_box_size, color_box_size };
}

void ColorInput::set_color_without_changing_text(Color color)
{
    if (m_color == color)
        return;
    m_color = color;
    update();
    if (on_change)
        on_change();
}

void ColorInput::set_color(Color color)
{
    if (m_color == color)
        return;
    set_text(m_color_has_alpha_channel ? color.to_string() : color.to_string_without_alpha());
};

void ColorInput::mousedown_event(MouseEvent& event)
{
    if (event.button() == MouseButton::Left && color_rect().contains(event.position())) {
        m_may_be_color_rect_click = true;
        return;
    }

    TextEditor::mousedown_event(event);
}

void ColorInput::mouseup_event(MouseEvent& event)
{
    if (event.button() == MouseButton::Left) {
        bool is_color_rect_click = m_may_be_color_rect_click && color_rect().contains(event.position());
        m_may_be_color_rect_click = false;
        if (is_color_rect_click) {
            auto dialog = GUI::ColorPicker::construct(m_color, window(), m_color_picker_title);
            dialog->set_color_has_alpha_channel(m_color_has_alpha_channel);
            if (dialog->exec() == GUI::Dialog::ExecOK)
                set_color(dialog->color());
            event.accept();
            return;
        }
    }
    TextEditor::mouseup_event(event);
}

void ColorInput::mousemove_event(MouseEvent& event)
{
    if (color_rect().contains(event.position())) {
        window()->set_override_cursor(StandardCursor::Hand);
        event.accept();
        return;
    } else {
        window()->set_override_cursor(StandardCursor::IBeam);
    }

    TextEditor::mousemove_event(event);
}

void ColorInput::paint_event(PaintEvent& event)
{
    TextEditor::paint_event(event);

    Painter painter(*this);
    painter.add_clip_rect(event.rect());

    painter.fill_rect(color_rect(), m_color);
    painter.draw_rect(color_rect(), Color::Black);
}
}