/*
 * production.cpp
 *
 *  Created on: Aug 20, 2017
 *      Author: wn
 */
#include "defines.h"

#define MQTT_MAX_PACKET_SIZE 256


#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <PubSubClient.h>

#include "configuration.h"

void callback(char* topic, byte* payload, unsigned int length);


WiFiClientSecure espClient;
PubSubClient client(espClient);




void setup_wifi() {
  delay(10);
  WiFi.mode(WIFI_STA);

  // We start by connecting to a WiFi network
#ifdef DEBUG
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(configBlock.wifiSsid);
#endif

  WiFi.begin(configBlock.wifiSsid, configBlock.wifiKey);

  while (WiFi.status() != WL_CONNECTED) {
    delay(50);
#ifdef DEBUG
    Serial.print(".");
#endif
  }

#ifdef DEBUG
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
#endif
}



void setupProduction() {
  setup_wifi();
  client.setServer(configBlock.mqttBroker, configBlock.mqttPort);

  pinMode(LIGHT_PIN, OUTPUT);
}



void callback(char* topic, byte* payload, unsigned int length) {
  const uint8_t BUFSIZE = 128;
  if ((length + 1) >= BUFSIZE) {  // 1 for terminating NUL
#ifdef DEBUG
	  Serial.println("Received message too long, ignore it");
#endif
  } else {
    char buffer[BUFSIZE];
    memcpy(buffer, payload, length);
    *(buffer + length) = 0;
#ifdef DEBUG
    Serial.print("Received message: ");
    Serial.print(length);
    Serial.print(" ");
    Serial.print(topic);
    Serial.print(" ");
    Serial.println(buffer);
#endif

    if (! strcmp(topic, configBlock.mqttTopic)) {
    	int value = atoi(buffer);
    	analogWrite(LIGHT_PIN, value);
    }
  }
}



void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
#ifdef DEBUG
    Serial.print("Attempting MQTT connection...");
#endif
    // Attempt to connect
    //char clientId[128];
    //snprintf(clientId, 127, "esp%s", WiFi.macAddress().c_str());
    if (client.connect(configBlock.mqttClientId, configBlock.mqttUser, configBlock.mqttPass)) {
#ifdef DEBUG
      Serial.println("connected");
#endif
      // Once connected, publish an announcement...
      //client.publish("IoT/espThermometer/status", "hello world");

      client.setCallback(callback);
      client.subscribe(configBlock.mqttTopic);

      client.publish(configBlock.mqttDebugTopic, "hello world");
      client.publish(configBlock.mqttDebugTopic, WiFi.localIP().toString().c_str());

    } else {
#ifdef DEBUG
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
#endif
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}


void mqtt_connect() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
}

void loopProduction() {
  static uint32_t lastMillis = 0;
  mqtt_connect();
}