#ifndef EXTRUDER_H
#define EXTRUDER_H

#define EXTRUDER_FORWARD true
#define EXTRUDER_REVERSE false

#define EXTRUDER_COUNT 1

void manage_all_extruders();

class extruder
{
private:

//these our the default values for the extruder.
    byte e_speed;
    int target_celsius;
    int max_celsius;
    byte heater_low;
    byte heater_high;
    byte heater_current;
    int extrude_step_count;

// These are used for temperature control    
    byte count ;
    int oldT, newT;
    
//this is for doing encoder based extruder control
    int rpm;
    long e_delay;
    int error;
    int last_extruder_error;
    int error_delta;
    bool e_direction;
    bool valve_open;

// The pins we control
    byte motor_dir_pin, motor_speed_pin, heater_pin, fan_pin, temp_pin, valve_dir_pin, valve_en_pin, step_en_pin;
    
public:

   extruder(byte md_pin, byte ms_pin, byte h_pin, byte f_pin, byte t_pin, byte vd_pin, byte ve_pin, byte se_pin);
   void wait_for_temperature();
   //byte wait_till_cool();
   byte wait_till_hot();
   void temperature_error();  
   void valve_set(bool open, int millis);
   void set_direction(bool direction);
   void set_speed(float es);
   void set_cooler(byte e_speed);
   void set_temperature(int temp);
   int get_temperature();
   int sample_temperature(byte pin);
   void manage();
   
   // Interrupt setup and handling functions for stepper-driven extruders
   
   void interrupt();
   void enableTimerInterrupt(); 	
   void disableTimerInterrupt(); 
   void setTimerCeiling(unsigned int c); 
   void setupTimerInterrupt();
   void setTimerResolution(byte r);
   void setTimer(long delay);
   unsigned int getTimerCeiling(long delay);
   byte getTimerResolution(long delay);
   

#ifdef TEST_MACHINE
   void heater_test();
   void drive_test();
   void valve_test();
   void fan_test();
#endif
   
};
#endif