#include <SPI.h>
#include <Adafruit_GFX.h>
#include <MD_Parola.h>

#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
#define MAX_DEVICES 4
#define CS_PIN 21

#define ROTARY_CLK 2
#define ROTARY_DT 4
#define ROTARY_SW 5

MD_Parola myDisplay = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

char myChar[10];
float encoderPos = 0.005;
int lastEncoderPos = 0;
bool buttonState = HIGH;
bool lastButtonState = HIGH;
float palegg = 0;
float mva = 1.25;
String prisomrade = "";
float NO1f = 0;
float NO2f = 0.01;
float NO3f = 0.02;
float NO4f = 0.03;
float NO5f = 0.04;


void setup() {
  Serial.begin(115200);
  // Intialize the object
  myDisplay.begin();
  // Set the intensity (brightness) of the display (0-15)
  myDisplay.setIntensity(8);
  // Clear the display
  myDisplay.displayClear();
  myDisplay.displayScroll("Online!", PA_LEFT, PA_PRINT, 50);
  myDisplay.displayAnimate();
  delay(2000);
  myDisplay.displayClear();
  pinMode(ROTARY_CLK, INPUT);
  pinMode(ROTARY_DT, INPUT);
  pinMode(ROTARY_SW, INPUT_PULLUP);
}


void displayOmrade(){
  if(prisomrade == "NO1"){
    myDisplay.displayScroll("NO1 Oslo/Oest-Norge", PA_LEFT, PA_SCROLL_LEFT, 40);
    while(true){
      if (myDisplay.displayAnimate()) {
        break;
      }
    }
  }
  else  if(prisomrade == "NO2"){
    myDisplay.displayScroll("NO2 Kristiansand/Soer-Norge", PA_LEFT, PA_SCROLL_LEFT, 40);
    while(true){
      if (myDisplay.displayAnimate()) {
        break;
      }
    }
  }
  else  if(prisomrade == "NO3"){
    myDisplay.displayScroll("NO3 Trondheim/Midt-Norge", PA_LEFT, PA_SCROLL_LEFT, 40);
    while(true){
      if (myDisplay.displayAnimate()) {
        break;
      }
    }
  }
  else  if(prisomrade == "NO4"){
    myDisplay.displayScroll("NO4 Tromsoe/Nord-Norge", PA_LEFT, PA_SCROLL_LEFT, 40);
    while(true){
      if (myDisplay.displayAnimate()) {
        break;
      }
    }
  }
  else  if(prisomrade == "NO5"){
    myDisplay.displayScroll("NNO5 Bergen/Vest-Norge", PA_LEFT, PA_SCROLL_LEFT, 40);
    while(true){
      if (myDisplay.displayAnimate()) {
        break;
      }
    }
  }
}

void updateDisplay(float value, char *result, int decimalPlaces) {
  dtostrf(value, 0, decimalPlaces, result);
  strcat(result, ",-");
  myDisplay.displayClear(); // Clear the display
  myDisplay.displayText(result, PA_CENTER, 80, 1000, PA_NO_EFFECT, PA_NO_EFFECT);
  myDisplay.displayAnimate();
}

void startup(){
  prisomradefunksjon();
  myDisplay.displayScroll("Valgt område:", PA_LEFT, PA_SCROLL_LEFT, 40);
  while(true){
    if (myDisplay.displayAnimate()) {
      break;
    }
  }
  displayOmrade();

  myDisplay.displayScroll("Still inn paalegg per kWh i NOK før MVA:", PA_LEFT, PA_SCROLL_LEFT, 40);
  while(true){
    if (myDisplay.displayAnimate()) {
      break;
    }
  }
  avgift();
  myDisplay.displayScroll("Paalegg per kWh:", PA_LEFT, PA_SCROLL_LEFT, 40);
  while(true){
    if (myDisplay.displayAnimate()) {
      break;
    }
  }
  updateDisplay(palegg, myChar, 2);
  while(true){
    if (myDisplay.displayAnimate()) {
      break;
    }
  }
  myDisplay.displayScroll("Henter data fra API....", PA_LEFT, PA_SCROLL_LEFT, 40);
  while(true){
    if (myDisplay.displayAnimate()) {
      break;
    }
  }

}
void avgift(){
  encoderPos = 0;
  updateDisplay(encoderPos, myChar, 2);
  while(true) {
    int readingCLK = digitalRead(ROTARY_CLK);
    int readingDT = digitalRead(ROTARY_DT);
    int readingSW = digitalRead(ROTARY_SW);
    //update screen
    myDisplay.displayAnimate();
    if (readingCLK != lastEncoderPos) {
      if (readingDT != readingCLK) {
        encoderPos = encoderPos + 0.005;
      } 
      else if(encoderPos > 0){
        encoderPos = encoderPos - 0.005;
      }

      // Update the display with the current encoder position
      updateDisplay(encoderPos, myChar, 2);

      lastEncoderPos = readingCLK;
    }

    if (readingSW != lastButtonState) {
      if (readingSW == LOW) {
        // The button is pressed
        palegg = encoderPos;
        Serial.print(palegg);
        break;
        // Add your button press action here
      }

      lastButtonState = readingSW;
    }
  }
}

bool areFloatsEqual(float a, float b, float tolerance = 0.002) {
    return std::fabs(a - b) < tolerance;
}

void prisomradefunksjon(){
  encoderPos = 0;
  myDisplay.displayScroll("Still inn område:", PA_LEFT, PA_SCROLL_LEFT, 40);
  while(true){
    if (myDisplay.displayAnimate()) {
      break;
    }
  }
  while(true) {
    int readingCLK = digitalRead(ROTARY_CLK);
    int readingDT = digitalRead(ROTARY_DT);
    int readingSW = digitalRead(ROTARY_SW);
    //update screen
    if (myDisplay.displayAnimate()) {
      myDisplay.displayReset();
    }
    if (readingCLK != lastEncoderPos) {
      if (readingDT != readingCLK) {
        encoderPos = encoderPos + 0.005;
      } 
      else if(encoderPos >= 0){
        encoderPos = encoderPos - 0.005;
      }
      Serial.println(encoderPos, 3);
      myDisplay.displayScroll("NO1 Oslo/Oest-Norge", PA_LEFT, PA_SCROLL_LEFT, 20);
      prisomrade = "NO1";
      //encoderPos til Områder
      if (areFloatsEqual(encoderPos, NO1f)) {
        myDisplay.displayScroll("NO1 Oslo/Oest-Norge", PA_LEFT, PA_SCROLL_LEFT, 20);
        prisomrade = "NO1";
      } else if (areFloatsEqual(encoderPos, NO2f)) {
        myDisplay.displayScroll("NO2 Kristiansand/Soer-Norge", PA_LEFT, PA_SCROLL_LEFT, 20);
        prisomrade = "NO2";
      } else if (areFloatsEqual(encoderPos, NO3f)) {
        myDisplay.displayScroll("NO3 Trondheim/Midt-Norge", PA_LEFT, PA_SCROLL_LEFT, 20);
        prisomrade = "NO3";
      } else if (areFloatsEqual(encoderPos, NO4f)) {
        myDisplay.displayScroll("NO4 Tromsoe/Nord-Norge", PA_LEFT, PA_SCROLL_LEFT, 20);
        prisomrade = "NO4";
      } else if (areFloatsEqual(encoderPos, NO5f)) {
        myDisplay.displayScroll("NO5 Bergen/Vest-Norge", PA_LEFT, PA_SCROLL_LEFT, 20);
        prisomrade = "NO5";
      } else if (encoderPos > 0.04) {
          encoderPos = 0.035;
      }
      else if (encoderPos < 0.00) {
          encoderPos = 0;
      }
      Serial.println(encoderPos, 3);
      // Update the display with the current encoder position


      lastEncoderPos = readingCLK;
    }

    if (readingSW != lastButtonState) {
      if (readingSW == LOW) {
        // The button is pressed
        break;
        // Add your button press action here
      }

      lastButtonState = readingSW;
    }
  }
}








void loop() {
  startup();

  delay(5000);
}