#include <wiringPi.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <lirc/lirc_client.h>
#include <time.h>


void flipLED (int led);

//The WiringPi pin numbers used by our LEDs
#define LED1 4
#define LED2 5
#define LED3 6

#define ON 1
#define OFF 0

int main(int argc, char *argv[])
{
   struct lirc_config *config;

   //Timer for our buttons
   int buttonTimer = millis();


   char *code;
   char *c;



   //Initiate WiringPi and set WiringPi pins 4, 5 & 6 (GPIO 23, 24 & 25) to output.
   //These are the pins the LEDs are connected to.
   if (wiringPiSetup () == -1)
     exit (1) ;

   pinMode (LED1, OUTPUT);
   pinMode (LED2, OUTPUT);
   pinMode (LED3, OUTPUT);

   //Initiate LIRC. Exit on failure
   if(lirc_init("lirc",1)==-1)
       exit(EXIT_FAILURE);

   //Read the default LIRC config at /etc/lirc/lircd.conf This is the config for your remote.
   if(lirc_readconfig(NULL,&config,NULL)==0)
   {
       //Do stuff while LIRC socket is open 0=open -1=closed.
       while(lirc_nextcode(&code)==0)
       {
           //If code = NULL, meaning nothing was returned from LIRC socket,
           //then skip lines below and start while loop again.
           if(code==NULL) continue;{
               //Make sure there is a 400ms gap before detecting button presses.
               if (millis() - buttonTimer > 400){
                   //Check to see if the string "KEY_1" appears anywhere within the string 'code'.
                   if(strstr (code,"KEY_1")){
                       printf("MATCH on KEY_1\n");
                       flipLED(LED1);
                       buttonTimer = millis();
                   }
                   else if(strstr (code,"KEY_2")){
                       printf("MATCH on KEY_2\n");
                       flipLED(LED2);
                       buttonTimer = millis();
                   }
                   else if(strstr (code,"KEY_3")){
                       printf("MATCH on KEY_3\n");
                       flipLED(LED3);
                       buttonTimer = millis();
                   }
               }
           }
           //Need to free up code before the next loop
           free(code);
       }
       //Frees the data structures associated with config.
       lirc_freeconfig(config);
   }
   //lirc_deinit() closes the connection to lircd and does some internal clean-up stuff.
   lirc_deinit();
   exit(EXIT_SUCCESS);
}

void flipLED (int led)
{
   //If LED is on, turn it off. Otherwise it is off, so thefore we need to turn it on.
   if(digitalRead(led)==ON)
       digitalWrite(led, OFF);
   else
       digitalWrite(led, ON);
}