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/**

 BETA version of Emitter object for use in BOM simulator

 */

#include "emitter.h"

#include <wx/wx.h>

#define DEFAULT_PEN_R 0xb3

#define DEFAULT_PEN_G 0xb8

#define DEFAULT_PEN_B 0xff

using namespace std;

namespace scoutsim

{

    /**

     * The emitter object, which is responsible for refreshing itself and

     * updating its position.

     *

     */

    Emitter::Emitter(const ros::NodeHandle& nh,

                 const wxImage& emitter_image,

                 const Vector2& pos,

                 wxBitmap *path_bitmap,

                 float orient,

                 float aperture, 

                 int distance)

        : path_bitmap(path_bitmap)

          , ignore_behavior(false)

          , node (nh)

          , emitter_image(emitter_image)

          , pos(pos)

          , orient(orient)

          , aperture(aperture)

          , distance(distance)

          , pen_on(true)

          , pen(wxColour(DEFAULT_PEN_R, DEFAULT_PEN_G, DEFAULT_PEN_B))

    {

        pen.SetWidth(3);

        emitter = wxBitmap(emitter_image);

        color_pub = node.advertise<Color>("color_sensor", 1);

        set_pen_srv = node.advertiseService("set_pen",

                                            &Emitter::setPenCallback,

                                            this);

        // Init latch

        teleop_latch = 0;

    }

    bool Emitter::setPenCallback(scoutsim::SetPen::Request& req,

                               scoutsim::SetPen::Response&)

    {

        pen_on = !req.off;

        if (req.off)

        {

            return true;

        }

        wxPen pen(wxColour(req.r, req.g, req.b));

        if (req.width != 0)

        {

            pen.SetWidth(req.width);

        }

        pen = pen;

        return true;

    }

    // Scale to linesensor value

    unsigned int Emitter::rgb_to_grey(unsigned char r,

                                    unsigned char g,

                                    unsigned char b)

    {

        // Should be 0 to 255

        unsigned int grey = ((unsigned int) r + (unsigned int) g + (unsigned int) b) / 3;

        /// @todo Convert to the proper range

        return 255 - grey;

    }

    /// Sends back the position of this emitter so scoutsim can save

    /// the world state

    /// @todo remove dt param

    geometry_msgs::Pose2D Emitter::update(double dt, wxMemoryDC& path_dc,

                                        const wxImage& path_image,

                                        const wxImage& lines_image,

                                        const wxImage& walls_image,

                                        wxColour background_color,

                                        world_state state)

    {

        pos.x = min(max(pos.x, 0.0f), state.canvas_width);

        pos.y = min(max(pos.y, 0.0f), state.canvas_height);

        //int canvas_x = pos.x * PIX_PER_METER;

        //int canvas_y = pos.y * PIX_PER_METER;

        {

            wxImage rotated_image =

                emitter_image.Rotate(orient - PI/2.0,

                                   wxPoint(emitter_image.GetWidth() / 2,

                                           emitter_image.GetHeight() / 2),

                                   false);

            for (int y = 0; y < rotated_image.GetHeight(); ++y)

            {

                for (int x = 0; x < rotated_image.GetWidth(); ++x)

                {

                    if (rotated_image.GetRed(x, y) == 255

                            && rotated_image.GetBlue(x, y) == 255

                            && rotated_image.GetGreen(x, y) == 255)

                    {

                        rotated_image.SetAlpha(x, y, 0);

                    }

                }

            }

            emitter = wxBitmap(rotated_image);

        }

        geometry_msgs::Pose2D my_pose;

        my_pose.x = pos.x;

        my_pose.y = pos.y;

        my_pose.theta = orient;

        return my_pose;

    }

    geometry_msgs::Pose2D Emitter::get_pos()

    {

        geometry_msgs::Pose2D my_pose;

        my_pose.x = pos.x;

        my_pose.y = pos.y;

        my_pose.theta = orient;

        return my_pose;

    }

    void Emitter::paint(wxDC& dc)

    {

        wxSize emitter_size = wxSize(emitter.GetWidth(), emitter.GetHeight());

        dc.DrawBitmap(emitter, pos.x * PIX_PER_METER - (emitter_size.GetWidth() / 2),

                      pos.y * PIX_PER_METER - (emitter_size.GetHeight() / 2), true);

    }

    void Emitter::set_emitter_visual(bool on)

    {

        emitter_visual_on = on;

    }

}

/** @} */