/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004, 2005, 2006, 2007 Olof Naessén and Per Larsson
 *
 *                                                         Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naessén a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
 * Visit: http://guichan.darkbits.org             )Qk<P ` _: :+' .'  "{[
 *                                               .)j(] .d_/ '-(  P .   S
 * License: (BSD)                                <Td/Z <fP"5(\"??"\a.  .L
 * Redistribution and use in source and          _dV>ws?a-?'      ._/L  #'
 * binary forms, with or without                 )4d[#7r, .   '     )d`)[
 * modification, are permitted provided         _Q-5'5W..j/?'   -?!\)cam'
 * that the following conditions are met:       j<<WP+k/);.        _W=j f
 * 1. Redistributions of source code must       .$%w\/]Q  . ."'  .  mj$
 *    retain the above copyright notice,        ]E.pYY(Q]>.   a     J@\
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef GCN_WINDOW_HPP
#define GCN_WINDOW_HPP

#include <string>

#include "guisan/mouselistener.hpp"
#include "guisan/platform.hpp"
#include "guisan/widgets/container.hpp"

namespace gcn
{
    /**
     * An implementation of a movable window that can contain other widgets.
     */
    class GCN_CORE_DECLSPEC Window : public Container,
                                     public MouseListener
    {
    public:
        /**
         * Constructor.
         */
        Window();

        /**
         * Constructor. The window will be automatically resized in height
         * to fit the caption.
         *
         * @param caption the caption of the window.
         */
        explicit Window(const std::string& caption);

        /**
         * Destructor.
         */
        ~Window() override;

        /**
         * Sets the caption of the window.
         *
         * @param caption The caption of the window.
         * @see getCaption
         */
        void setCaption(const std::string& caption);

        /**
         * Gets the caption of the window.
         *
         * @return the caption of the window.
         * @see setCaption
         */
        [[nodiscard]] const std::string& getCaption() const;

        /**
         * Sets the alignment of the caption.
         *
         * @param alignment The alignment of the caption.
         * @see getAlignment, Graphics
         */
        void setAlignment(Graphics::Alignment alignment);

        /**
         * Gets the alignment of the caption.
         *
         * @return The alignment of caption.
         * @see setAlignment, Graphics
         */
        [[nodiscard]] Graphics::Alignment getAlignment() const;

        /**
         * Sets the padding of the window. The padding is the distance between the
         * window border and the content.
         *
         * @param padding The padding of the window.
         * @see getPadding
         */
        void setPadding(unsigned int padding);

        /**
         * Gets the padding of the window. The padding is the distance between the
         * window border and the content.
         *
         * @return The padding of the window.
         * @see setPadding
         */
        [[nodiscard]] unsigned int getPadding() const;

        /**
         * Sets the title bar height.
         *
         * @param height The title height value.
         * @see getTitleBarHeight
         */
        void setTitleBarHeight(unsigned int height);

        /**
         * Gets the title bar height.
         *
         * @return The title bar height.
         * @see setTitleBarHeight
         */
        unsigned int getTitleBarHeight();

        /**
         * Sets the window to be moveble or not.
         *
         * @param movable True if the window should be movable, false otherwise.
         * @see isMovable
         */
        void setMovable(bool movable);

        /**
         * Checks if the window is movable.
         *
         * @return True if the window is movable, false otherwise.
         * @see setMovable
         */
        [[nodiscard]] bool isMovable() const;

        /**
         * Sets the window to be opaque or not. An opaque window will draw its background
         * and its content. A non opaque window will only draw its content.
         *
         * @param opaque True if the window should be opaque, false otherwise.
         * @see isOpaque
         */
        void setOpaque(bool opaque) override;

        /**
         * Checks if the window is opaque.
         *
         * @return True if the window is opaque, false otherwise.
         * @see setOpaque
         */
        bool isOpaque();

        /**
         * Resizes the window to fit the content.
         */
        void resizeToContent() override;

        // Inherited from Widget

        void draw(Graphics* graphics) override;
        void drawFrame(Graphics* graphics) override;
        Rectangle getChildrenArea() override;

        // Inherited from MouseListener

        void mousePressed(MouseEvent& mouseEvent) override;
        void mouseDragged(MouseEvent& mouseEvent) override;
        void mouseReleased(MouseEvent& mouseEvent) override;

    protected:
        /**
         * Holds the caption of the window.
         */
        std::string mCaption;

        /**
         * Holds the alignment of the caption.
         */
        Graphics::Alignment mAlignment = Graphics::Alignment::Center;

        /**
         * Holds the padding of the window.
         */
        unsigned int mPadding = 2;

        /**
         * Holds the title bar height of the window.
         */
        unsigned int mTitleBarHeight;

        /**
         * True if the window is movable, false otherwise.
         */
        bool mMovable = true;

        /**
         * True if the window is opaque, false otherwise.
         */
        bool mOpaque = true;

        /**
         * Holds a drag offset as an x coordinate where the drag of the window
         * started if the window is being dragged. It's used to move the window 
         * correctly when dragged.
         */
        int mDragOffsetX = 0;

        /**
         * Holds a drag offset as an y coordinate where the drag of the window
         * started if the window is being dragged. It's used to move the window 
         * correctly when dragged.
         */
        int mDragOffsetY = 0;

        /**
         * True if the window is being moved, false otherwise.
         */
        bool mMoved = false;
    };
}

#endif // end GCN_WINDOW_HPP
