root/applications/doprava/traffic_agent.h @ 1115

/*!
\file
\brief Traffic Light Agents 
\author Vaclav Smidl.
*/

#ifndef TRAGE_H
#define TRAGE_H


#include <base/participants.h>

using namespace bdm;

class BaseTrafficAgent;

//! detector of traffic variables
class Lane{
public:
        Array<string> inputs;
        Array<string> outputs;
        vec input_distances;
        vec output_distances;
        vec alpha; //size of outputs
        //! percent of queue lenght (for "multiline queues")
        double beta;
        string queue;
        string sg;

        //! function loading info from Setting
        void from_setting(const Setting &set){
                UI::get(inputs,set,"inputs",UI::compulsory);
                UI::get(outputs,set,"outputs",UI::compulsory);
                UI::get(input_distances,set,"input_distances",UI::compulsory);
                UI::get(output_distances,set,"output_distances",UI::compulsory);
                UI::get(alpha,set,"alpha",UI::compulsory);
                UI::get(queue,set,"queue",UI::compulsory);
                UI::get(sg,set,"sg",UI::compulsory);
                UI::get(beta, set, "beta");
        }
};

//! class that operates on a signal group
class LaneHandler {
protected:
        //! pointer to physical lane
        const Lane &lane;
        //! agent pointer
        BaseTrafficAgent *agent;

public:
        //! actual data from the relevant signal group
        vec inputs;
        //! queue length
        double queue; 
        //! description of det_data
        RV rv_inputs;
        //! description of det_data
        RV rv_outputs;
        //! description of det_data
        RV rv_queue;
        //! link from global measured data 
        datalink agentin2input;
        //!
        datalink output2agentout;
        //!
        int queue_index;

public:
        LaneHandler(const Lane &lane0): lane(lane0){
                for (int i=0;i<lane0.inputs.length();i++){
                        rv_inputs.add(RV(lane.inputs(i), 2));
                }
                for (int i=0;i<lane0.outputs.length();i++){
                        rv_outputs.add(RV(lane.outputs(i), 2)); 
                }
                rv_queue.add(RV(lane.queue, 1)); 
                inputs.set_size(rv_inputs._dsize());
        }


        void connect_data(BaseTrafficAgent &agent0);

        //! computes expected density in cars/s
        double expected_density();

        //! arbitrary function that computes the need of the signal group for green light in common units (number of waiting cars?)
        double expected_output(double green_time);
};

/*!
\brief  Basic Traffic Agent

*/
class BaseTrafficAgent : public Participant {

LOG_LEVEL(BaseTrafficAgent,logdata);
public:
        //! Signal Groups
        Array<Lane> lanes;

        Array<LaneHandler*> lanehs;

        //!data from messages
        vec inputs;

        //! decription of msg_data
        RV rv_inputs;

        //! data to broadcast
        vec outputs;

        //! description of broadcast dataind
        RV rv_outputs;

        vec queues;

        //! description of queues
        RV rv_queues;

        //! 
        vec green_starts;

        //!
        vec green_times;

        //!
        Array<string> green_names;

        //!
        Array<string> stage_names;

        //!
        vec stage_times;





        //! datalink from DS to input variables
        datalink ds2inputs;

        //! datalink from DS to output variables
        datalink ds2queues;

        //! action description
        RV rv_action;

        datalink_part action2ds;

        Array<string> neighbours;

        Array<RV> rv_neighbours_out;

        Array<datalink> output2neighbour;

        //! simulator's step length in seconds
        static const int step_length=90;

        //! lenght of cycle in seconds
        static const int cycle_length=80;



public:
        void validate(){

                lanehs.set_length(lanes.length());
                for (int l=0; l<lanes.length(); l++){
                        lanehs(l) = new LaneHandler(lanes(l));

                        rv_inputs.add(lanehs(l)->rv_inputs);
                        rv_outputs.add(lanehs(l)->rv_outputs);
                        rv_queues.add(lanehs(l)->rv_queue);
                }
                inputs.set_size(rv_inputs._dsize());
                outputs.set_size(rv_outputs._dsize());
                queues.set_size(rv_queues._dsize());

                for (int l=0; l<lanes.length(); l++){
                        lanehs(l)->connect_data(*this);
                }

                //for -- rv_outputs -- 
                // TODO vybrat rv pro sousedy 
                rv_neighbours_out.set_length(neighbours.length());
                output2neighbour.set_length(neighbours.length());

                for (int i=0; i<neighbours.length(); i++){
                        for (int r=0; r<rv_outputs.length(); r++){
                                int str_pos = rv_outputs.name(r).compare(neighbours(i));
                                if (str_pos>(int)neighbours(i).length()){
                                        rv_neighbours_out(i).add(rv_outputs.subselect(vec_1(r)));
                                }
                        }
                        // connect datasource
                        output2neighbour(i).set_connection(rv_neighbours_out(i), rv_outputs);
                }

                // lanehs knows RVS
                // write internal checks if all was loaded OK

        }
        void receive(const Setting &msg){
                string what;
                UI::get(what, msg, "what", UI::compulsory);

                if (what=="new_stable_state"){ // 
                        // field data 
                        // extract decription of teh received datavector
                        shared_ptr<RV> rv=UI::build<RV>(msg,"rv",UI::compulsory);
                        // find if it is needed
                        ivec ind=rv->dataind(rv_inputs); // position of rv in in_rv;
                        if (ind.length()>0){ //data are interesting
                                vec dt;
                                UI::get(dt, msg, "value",UI::compulsory); // get data
                                set_subvector(inputs, ind,  dt); //check size?
                        }                               
                } else {
                        Participant::receive(msg);
                }
        }
        void log_register(logger &L, const string &prefix){
                root::log_register ( L, prefix );
                if ( log_level[logdata]){
                        L.add_vector ( log_level, logdata, RV ( 1 ), prefix );  
                }
        }
        void log_write() const {
                if (log_level[logdata]){
                        log_level.store(logdata, inputs);
                }
        }

        void broadcast(Setting& set){
                // broadcast data to all neighbours
                for (int i=0; i<neighbours.length(); i++){
                        Setting &msg =set.add(Setting::TypeGroup);

                        // if...
                        // copy from create message
                        // create msg with fields {to=..., what=data, rv=..., value = ...}
                        UI::save ( neighbours(i), msg, "to");
                        UI::save ( (string)"new_stable_state", msg, "what");
                        UI::save ( &(rv_neighbours_out(i)), msg, "rv");
                        UI::save( output2neighbour(i).pushdown(outputs), msg, "value");
                }

        }
        void adapt(const vec &glob_dt){
                // copy data from global vector to sSGHandlers
                ds2inputs.filldown(glob_dt, inputs);
                //copy data from neighbours
                ds2queues.filldown(glob_dt, queues);
                // copy sg_length ... and others...
        }
        void act(vec &glob_ut){
                vec action; // trivial stuff
                action2ds.filldown(action,glob_ut);
        }

        void ds_register(const DS &ds){
                //register ds2output
                ds2inputs.set_connection(rv_inputs, ds._drv());
                ds2queues.set_connection(rv_queues, ds._drv());

                inputs.set_size(rv_inputs._dsize());
                action2ds.set_connection( ds._urv(), rv_action);

        }

        void from_setting(const Setting &set);
};
UIREGISTER(BaseTrafficAgent);

#endif //TRAGE_H