//========== Preprocesor ==========

//---- Required ----
#include <ESP8266WiFi.h>
#include <ArduinoOTA.h>
#include <SoftwareSerial.h>
//------------------
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>

#include "Tasker.h"

#include "config.h"

//========== Create objects ==========

AsyncWebServer server(80);
Tasker tasker;
SoftwareSerial mySerial(5, 4);

//========== Init variables ==========

String metrics = "";
byte nodeID;
int napeti;
int proud;
int vykon;
int teplota;
int strida;
unsigned long vyroba;
byte byteRec;
byte delka;
byte cs;
byte prijem[40];
bool dataOK = false;


//=================================


void setup() {
  //========== Wi-Fi setup ==========

  WiFi.mode(WIFI_STA);
  WiFi.begin(STASSID, STAPSK);
  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    //Connection Failed! Rebooting...
    delay(5000);
    ESP.restart();
  }

  //========== OTA setup ==========

  // Port defaults to 8266
  // ArduinoOTA.setPort(8266);

  // Hostname defaults to esp8266-[ChipID]
  // ArduinoOTA.setHostname("myesp8266");

  // No authentication by default
  // ArduinoOTA.setPassword("admin");

  // Password can be set with it's md5 value as well
  // MD5(admin) = 21232f297a57a5a743894a0e4a801fc3
  // ArduinoOTA.setPasswordHash("21232f297a57a5a743894a0e4a801fc3");
  ArduinoOTA.begin();
  SPIFFS.begin();

  //========== Pin setup ==========

  pinMode(4, OUTPUT);
  digitalWrite(4, LOW);
  pinMode(5, INPUT);

  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, HIGH);

  //========== Serial setup ==========

  mySerial.begin(9600);

  //========== Tasks init ==========

  tasker.setInterval(otaHandle, 1000);

  //========== Web server setup ==========

  if (METRICS_EXPORT) {
    server.on("/metrics", HTTP_GET, [](AsyncWebServerRequest * request) {
      tasker.setTimeout(tripleLedBlink, 10);
      request->send(200, "text/plain; charset=utf-8", metrics);
    });
    server.onNotFound(notFound);
    server.begin();
  }
}

// the loop routine runs over and over again forever:
void loop() {
  tasker.loop();

  readSiton();
}

void otaHandle() {
  ArduinoOTA.handle();
}

void notFound(AsyncWebServerRequest *request) {
  request->send(404, "text/plain", "Not found");
}
void ledBlink() {
  digitalWrite(LED_PIN, LOW);
  delay(200);
  digitalWrite(LED_PIN, HIGH);
}
void tripleLedBlink() {
  digitalWrite(LED_PIN, LOW);
  delay(50);
  digitalWrite(LED_PIN, HIGH);
  delay(50);
  digitalWrite(LED_PIN, LOW);
  delay(50);
  digitalWrite(LED_PIN, HIGH);
  delay(50);
  digitalWrite(LED_PIN, LOW);
  delay(50);
  digitalWrite(LED_PIN, HIGH);
}
void readSiton() {
  //===========================================================================
  //cte ze serial portu data ve formatu EasyTransfer
  if (mySerial.available() >= 0x25) {
    delay(10);
    byteRec = mySerial.read();    // Precte byte
    if (byteRec == 0x06) {
      byteRec = mySerial.read();
      if (byteRec == 0x85) {
        ledBlink();
        delka = mySerial.read();
        cs = delka;
        for (byte i = 0; i < delka ; i++) {
          byteRec = mySerial.read();
          prijem[i] = byteRec;
          cs ^= byteRec; //kontrolni soucet
        }
        //Serial.println();
        byteRec = mySerial.read();
        //Serial.println(byteRec, HEX);
        //Serial.print(cs, HEX);
        if (cs == byteRec) { //kontrolni soucet OK data jsou platna
          dataOK = true;
          nodeID = prijem[0];
          napeti = word(prijem[5], prijem[4]);
          proud  = word(prijem[7], prijem[6]);
          vykon  = word(prijem[9], prijem[8]);
          teplota = word(prijem[11], prijem[10]);
          strida = word(prijem[13], prijem[12]);

          vyroba  = (long)prijem[23] << 24;
          vyroba += (long)prijem[22] << 16;
          vyroba += (long)prijem[21] << 8;
          vyroba += (long)prijem[20];

          metrics = "dataOK ";
          metrics += dataOK;
          metrics += "\nnodeID ";
          metrics += nodeID;
          metrics += "\nnapeti ";
          metrics += napeti;
          metrics += "\nproud ";
          metrics += proud;
          metrics += "\nvykon ";
          metrics += vykon;
          metrics += "\nteplota ";
          metrics += teplota;
          metrics += "\nstrida ";
          metrics += strida;
          metrics += "\nvyroba ";
          metrics += vyroba;
        } else {
          dataOK = false;
          metrics = "dataOK ";
          metrics += dataOK;
        }
      }
    }
  }
}