/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * 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 ` _: :+' .'  "{[
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#ifndef GCN_TEXTBOX_HPP
#define GCN_TEXTBOX_HPP

#include "guisan/keylistener.hpp"
#include "guisan/mouselistener.hpp"
#include "guisan/platform.hpp"
#include "guisan/widget.hpp"

#include <memory>
#include <string>
#include <vector>

namespace gcn
{
    class Text;

    /**
     * An implementation of a text box where a user can enter text that contains many lines.
     */
    class GCN_CORE_DECLSPEC TextBox:
        public Widget,
        public MouseListener,
        public KeyListener
    {
    public:
        /**
         * Constructor.
         */
        TextBox();

        /**
         * Constructor.
         *
         * @param text The default text of the text box.
         */
        TextBox(const std::string& text);

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

        /**
         * Sets the text of the text box.
         *
         * @param text The text of the text box.
         * @see getText
         */
        void setText(const std::string& text);

        /**
         * Gets the text of the text box.
         *
         * @return The text of the text box.
         * @see setText
         */
        std::string getText() const;

        /**
         * Gets a certain row from the text.
         *
         * @param row The number of the row to get from the text.
         * @return A row from the text of the text box.
         * @see setTextRow
         */
        std::string getTextRow(int row) const;

        /**
         * Sets the text of a certain row of the text.
         *
         * @param row The number of the row to set in the text.
         * @param text The text to set in the given row number.
         * @see getTextRow
         */
        void setTextRow(int row, const std::string& text);

        /**
         * Gets the number of rows in the text.
         *
         * @return The number of rows in the text.
         */
        unsigned int getNumberOfRows() const;

        /**
         * Gets the caret position in the text.
         *
         * @return The caret position in the text.
         * @see setCaretPosition
         */
        unsigned int getCaretPosition() const;

        /**
         * Sets the position of the caret in the text.
         *
         * @param position the positon of the caret.
         * @see getCaretPosition
         */
        void setCaretPosition(unsigned int position);

        /**
         * Gets the row number where the caret is currently located.
         *
         * @return The row number where the caret is currently located.
         * @see setCaretRow
         */
        unsigned int getCaretRow() const;

        /**
         * Sets the row where the caret should be currently located.
         *
         * @param The row where the caret should be currently located.
         * @see getCaretRow
         */
        void setCaretRow(int row);

        /**
         * Gets the column where the caret is currently located.
         *
         * @return The column where the caret is currently located.
         * @see setCaretColumn
         */
        unsigned int getCaretColumn() const;

        /**
         * Sets the column where the caret should be currently located.
         *
         * @param The column where the caret should be currently located.
         * @see getCaretColumn
         */
        void setCaretColumn(int column);

        /**
         * Sets the row and the column where the caret should be currently
         * located.
         *
         * @param row The row where the caret should be currently located.
         * @param column The column where the caret should be currently located.
         * @see getCaretRow, getCaretColumn
         */
        void setCaretRowColumn(int row, int column);

        /**
         * Scrolls the text to the caret if the text box is in a scroll area.
         * 
         * @see ScrollArea
         */
        virtual void scrollToCaret();

        /**
         * Checks if the text box is editable.
         *
         * @return True it the text box is editable, false otherwise.
         * @see setEditable
         */
        bool isEditable() const;

        /**
         * Sets the text box to be editable or not.
         *
         * @param editable True if the text box should be editable, false otherwise.
         */
        void setEditable(bool editable);

        /**
         * Adds a row of text to the end of the text.
         *
         * @param row The row to add.
         */
        virtual void addRow(const std::string& row);

        /**
         * Checks if the text box is opaque. An opaque text box will draw
         * its background and its text. A non opaque text box only draw its
         * text making it transparent.
         *
         * @return True if the text box is opaque, false otherwise.
         * @see setOpaque
         */
        bool isOpaque();

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

        // Inherited from Widget

        void draw(Graphics* graphics) override;
        void fontChanged() override;

        // Inherited from KeyListener

        void keyPressed(KeyEvent& keyEvent) override;

        // Inherited from MouseListener

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

    protected:
        /**
         * Draws the caret. Overloaded this method if you want to
         * change the style of the caret.
         *
         * @param graphics a Graphics object to draw with.
         * @param x the x position.
         * @param y the y position.
         */
        virtual void drawCaret(Graphics* graphics, int x, int y);

        /**
         * Adjusts the text box's size to fit the text.
         */
        virtual void adjustSize();

        /**
         * Holds the text of the text box.
         */
        std::unique_ptr<Text> mText;

        /**
         * True if the text box is editable, false otherwise.
         */
        bool mEditable = true;

        /**
         * True if the text box is editable, false otherwise.
         */
        bool mOpaque = true;
    };
}

#endif // end GCN_TEXTBOX_HPP
