/*
 * eepromsettings.c
 *
 *  Created on: 14.05.2020
 *      Author: agr
 */

#include "eepromsettings.h"
#include "struct.h"

/**
* read_EEPROM_Settings function
* This function is used to read the EEPROM settings at startup
*
* Overview:
* - Set the PIN for the RESET-button to input and activate pullups
* - Load the stored data from EEPROM into the eeprom_config struct
* - Check if a config is stored or the reset button is pressed. If one of the conditions is ture, set the defaults
*/
void read_EEPROM_Settings() {
  pinMode(RESET_PIN, INPUT);
  digitalWrite(RESET_PIN, HIGH);

  // read the current config
  EEPROM_readAnything(0, eeprom_config);

  // check if config is present or if reset button is pressed
  if (eeprom_config.config_set != 1 || digitalRead(RESET_PIN) == LOW) {
    // set default values
#ifdef DEBUG
	  Serial.println(eeprom_config.config_set);
	  Serial.println(digitalRead(RESET_PIN));
#endif

	  set_EEPROM_Default();
#ifdef DEBUG
    Serial.println("write default config");
#endif
    // write the config to eeprom
    EEPROM_writeAnything(0, eeprom_config);
  }
}

/**
* print_EEPROM_Settings() function
*
* This function is used for debugging the configuration.
* It prints the actual configuration to the serial port.
*/
#ifdef DEBUG
void print_EEPROM_Settings() {
    Serial.print("IP: ");
    for(int i = 0; i<4; i++) {
      Serial.print(eeprom_config.ip[i]);
      if (i<3) {
        Serial.print('.');
      }
    }
    Serial.println();

    Serial.print("Subnet: ");
    for(int i = 0; i<4; i++) {
      Serial.print(eeprom_config.subnet[i]);
      if (i<3) {
        Serial.print('.');
      }
    }
    Serial.println();

    Serial.print("Gateway: ");
    for(int i = 0; i<4; i++) {
      Serial.print(eeprom_config.gateway[i]);
      if (i<3) {
        Serial.print('.');
      }
    }
    Serial.println();

    Serial.print("DNS Server: ");
    for(int i = 0; i<4; i++) {
      Serial.print(eeprom_config.dns_server[i]);
      if (i<3) {
        Serial.print('.');
      }
    }
    Serial.println();

    Serial.print("MQTT Server: ");
       for(int i = 0; i<4; i++) {
         Serial.print(eeprom_config.mqtt_server[i]);
         if (i<3) {
           Serial.print('.');
         }
       }
       Serial.println();

    Serial.print("MAC: ");
    for (int a=0;a<6;a++) {
      Serial.print(eeprom_config.mac[a],HEX);
      if(a<5) {
        Serial.print(":");
      }
    }
    Serial.println();
    Serial.print("MQTTserver Port: ");
    Serial.println(eeprom_config.mqttserverPort);

    Serial.print("Webserver Port: ");
    Serial.println(eeprom_config.webserverPort);

    Serial.print("USE DHCP: ");
    Serial.println(eeprom_config.use_dhcp);

    Serial.print(" DHCP renew every ");
    Serial.print(eeprom_config.dhcp_refresh_minutes);
    Serial.println(" minutes");

    Serial.print("Config Set: ");
    Serial.println(eeprom_config.config_set);

}
#endif

// #############################################################################################################################################################


/**
* renewDHCP() function
* Renew the DHCP relase in a given interval.
*
* Overview:
* - Check if interval = 0 and set it to 1
* - Check if renew interval is reached and renew the lease
*/
void renewDHCP(int interval) {
  unsigned long interval_millis = interval * 60000;

  if (interval == 0 ) {
     interval = 1;
  }
  if (eeprom_config.use_dhcp==1) {
    if((millis() - last_dhcp_renew) >  interval_millis) {
      last_dhcp_renew=millis();
      dhcp_state = Ethernet.maintain();
    }
  }
}


/**
* setupNetwork() function
* This function is used to setupup the network according to the values stored in the eeprom
*
* Overview:
* - First of all read the EEPROM settings
* - Display a link to the ethernet setup
* - Check if DHCP should be used, if not create instaces of IPAddress for ip, gateway, subnet and dns_server
* - Invoke Ethernet.begin with all parameters if no dhcp is active (Ethernet.begin(mac, ip, dns_server, gateway, subnet);).
* - If DHCP is used invoke only with mac (Ethernet.begin(mac);) and display the ip on the serial console.
*/
void setupNetwork() {
  read_EEPROM_Settings();

  #ifdef DEBUG
   print_EEPROM_Settings();
  #endif

 // byte mac[] = { eeprom_config.mac[0], eeprom_config.mac[1], eeprom_config.mac[2], eeprom_config.mac[3], eeprom_config.mac[4], eeprom_config.mac[5] };

  if (eeprom_config.use_dhcp != 1) {
    IPAddress ip(eeprom_config.ip[0], eeprom_config.ip[1], eeprom_config.ip[2], eeprom_config.ip[3]);
    IPAddress gateway (eeprom_config.gateway[0],eeprom_config.gateway[1],eeprom_config.gateway[2],eeprom_config.gateway[3]);
    IPAddress subnet  (eeprom_config.subnet[0], eeprom_config.subnet[1], eeprom_config.subnet[2], eeprom_config.subnet[3]);
    IPAddress dns_server  (eeprom_config.dns_server[0], eeprom_config.dns_server[1], eeprom_config.dns_server[2], eeprom_config.dns_server[3]);
    Ethernet.begin(eeprom_config.mac, ip, dns_server, gateway, subnet);
  } else {
    if (Ethernet.begin(eeprom_config.mac) == 0) {
      Serial.print("Failed to configure Ethernet using DHCP");
    }
    Serial.println(Ethernet.localIP());
  }
}
// END Network section #########################################################################################################################################