#include "configuration.h"
#include "lora_utils.h"
#include "display.h"
#include "utils.h"

extern Beacon           *currentBeacon;
extern Configuration    Config;
extern bool             statusState;
extern uint32_t         statusTime;

extern bool             displayEcoMode; 
extern uint32_t         displayTime;
extern bool             displayState;
extern int              menuDisplay;
extern String           versionDate;

namespace utils {

  
  static char locator[11];
  // The letterize and getMaidenheadLocator functions are
  // Copyright (c) 2021 Mateusz Salwach
  // MIT License

  static char letterize(int x) {
      return (char) x + 65;
  }

  char *getMaidenheadLocator(double lat, double lon, int size) {
    double LON_F[]={20,2.0,0.083333,0.008333,0.0003472083333333333};
    double LAT_F[]={10,1.0,0.0416665,0.004166,0.0001735833333333333};
    int i;
    lon += 180;
    lat += 90;

    if (size <= 0 || size > 10) size = 6;
    size/=2; size*=2;

    for (i = 0; i < size/2; i++){
      if (i % 2 == 1) {
        locator[i*2] = (char) (lon/LON_F[i] + '0');
        locator[i*2+1] = (char) (lat/LAT_F[i] + '0');
      } else {
        locator[i*2] = letterize((int) (lon/LON_F[i]));
        locator[i*2+1] = letterize((int) (lat/LAT_F[i]));
      }
      lon = fmod(lon, LON_F[i]);
      lat = fmod(lat, LAT_F[i]);
    }
    locator[i*2]=0;
    return locator;
  }

  char *ax25_base91enc(char *s, uint8_t n, uint32_t v) {
    /* Creates a Base-91 representation of the value in v in the string */
    /* pointed to by s, n-characters long. String length should be n+1. */
    for(s += n, *s = '\0'; n; n--) {
      *(--s) = v % 91 + 33;
      v /= 91;
    }
    return(s);
  }

  static String padding(unsigned int number, unsigned int width) {
      String result;
      String num(number);
      if (num.length() > width) {
          width = num.length();
      }
      for (unsigned int i = 0; i < width - num.length(); i++) {
          result.concat('0');
      }
      result.concat(num);
      return result;
  }

  String createDateString(time_t t) {
      return String(padding(year(t), 4) + "-" + padding(month(t), 2) + "-" + padding(day(t), 2));
  }

  String createTimeString(time_t t) {
      return String(padding(hour(t), 2) + ":" + padding(minute(t), 2) + ":" + padding(second(t), 2));
  }

  void checkStatus() {
    if (statusState) {
      uint32_t statusTx = millis() - statusTime;
      if (statusTx > 15*60*1000) {
        String packet = currentBeacon->callsign + ">APLRT1";
        if (Config.path != "") {
          packet += "," + Config.path;
        }
        packet += ":>https://github.com/richonguzman/LoRa_APRS_Tracker " + versionDate;
        LoRa_Utils::sendNewPacket(packet);
        statusState = false;
      }
    }
  }

  void checkDisplayEcoMode() {
    uint32_t lastDisplayTime = millis() - displayTime;
    if (displayEcoMode && menuDisplay==0 && millis()>10*1000 && lastDisplayTime >= Config.displayTimeout*1000) {
      display_toggle(false);
      displayState = false;
    }
  }

  String getSmartBeaconState() {
    if (currentBeacon->smartBeaconState) {
      return "On";
    }
    return "Off";
  }

}