#include "chiller.h"
#include "display.h"
#include "encoder.h"
#include <EEPROM.h>

// TO DO:
// turn on and turn off loging
// duration the chiller / heater ran for
// power consumption
// send temperature
// I2C slave
// ability to control additional chillers and become slave chiller
// failsafe (done)
// operating temperature and shut off on over heat 


const int ENCODER_CLK = 2;
const int ENCODER_DT =  4;
const int ENCODER_SW = 3;


int thermistorPin = A2;
int peltierPin = 5;
int modePin = 7;

long lastInput = millis();


void encoderClick();
void encoderValueChange(int delta);

Encoder encoder;
Chiller chiller;
Screen screen;

int cursor = 0;

struct Setting{
  float targetTemp;
  float threshold;
  bool autoHeating;
  int channel;
  int failsafe;
} setting;



void setup() {
  Serial.begin(115200);
  Serial.println("Initializing...");
  loadConfig();
  chiller.init(peltierPin, thermistorPin, modePin);
  chiller.setTargetTemp(setting.targetTemp,setting.threshold,setting.autoHeating, setting.failsafe);
  Serial.println("Ready");
  screen.init();
  encoder.begin(ENCODER_CLK,ENCODER_DT,ENCODER_SW);
  encoder.setCallback(encoderValueChange,encoderClick);
  saveConfig();
}

void loop() {
  chiller.run();
  
  char temp[5];
  float t = chiller.getCurrentTemp();
  dtostrf(t,1,1,temp);
  temp[4] = 'c';

  // if in settings mode or menu and no input detected for 60s then exit menu
  if((millis() - lastInput) > 60000 && screen.screenMode != IDLE){
    screen.screenMode = IDLE;
  }

  if(screen.screenMode == IDLE){
    screen.showTemp(temp);
    screen.showIcon(chiller.getMode(), 14,1);
  }else if(screen.screenMode == SETTINGS){
    screen.showMenu(screen.cursor);
  }else if(screen.screenMode == MENU){
      if(screen.cursor == 0) {
          screen.showOptionF(screen.cursor, setting.targetTemp);
      }
      else if(screen.cursor == 1){
          screen.showOptionF(screen.cursor, setting.threshold);
      }
      else if(screen.cursor == 2){
          screen.showOptionB(screen.cursor, setting.autoHeating);
      }
      else if(screen.cursor == 3){
          screen.showOption(screen.cursor, String(setting.channel));
      }
      else if(screen.cursor == 4){
          screen.showOption(screen.cursor, String(setting.failsafe));
      }
  }
  delay(1000);
}


void loadConfig() {
  // Serial.println("Loading configuration");
  // //EEPROM.begin(1024);
  // byte sig = EEPROM.read(0);
  // EEPROM.get(1, setting);  
  // //EEPROM.commit();
  // //EEPROM.end();
  // if(sig != 1){
  //   Serial.println("First run");
    setting.targetTemp = 26;
    setting.autoHeating = true;
    setting.threshold = 1;
    setting.channel = 1;
    setting.failsafe = 30;
  // }
  // Serial.println("Loaded");
}

void saveConfig() {
  // Serial.println("Saving configuration");
  // //EEPROM.begin(1024);
  // EEPROM.put(0, byte(1));
  // EEPROM.put(1, setting);
  // //EEPROM.commit();
  // //EEPROM.end();
  // Serial.println("Saved");
}

void encoderClick();
void encoderValueChange(int delta);


void encoderClick(){
  lastInput = millis();
  if(screen.screenMode == IDLE){
    screen.screenMode = SETTINGS;
  }else if(screen.screenMode == SETTINGS){
    if(screen.cursor == 5){
      screen.screenMode = IDLE;
    }
    else{
      screen.screenMode = MENU;
    }
  }else if(screen.screenMode == MENU){
    screen.screenMode = SETTINGS;
  }
}

void encoderValueChange(int delta){
  lastInput = millis();
  if(screen.screenMode == SETTINGS){
    screen.cursor += delta;
    if(screen.cursor >= 5)
      screen.cursor = 0;
    if(screen.cursor <= -1)
      screen.cursor = 4;
  }else if(screen.screenMode == MENU){
    float change = (float)delta / 2.0;
    if(screen.cursor == 0){
      if((delta > 0 && setting.targetTemp < 29) || (delta < 0 && setting.targetTemp > 25)){
          setting.targetTemp += change;
      }
      chiller.setTargetTemp(setting.targetTemp,setting.threshold,setting.autoHeating, setting.failsafe);
    }else if(screen.cursor == 1){
      if((delta > 0 && setting.threshold < 1) || (delta < 0 && setting.threshold > 0.5)){
          setting.threshold += change;
      }
      chiller.setTargetTemp(setting.targetTemp,setting.threshold,setting.autoHeating, setting.failsafe);
    }else if(screen.cursor == 2){
      if(setting.autoHeating == true)
        setting.autoHeating = false;
      else
        setting.autoHeating = true;
      chiller.setTargetTemp(setting.targetTemp,setting.threshold,setting.autoHeating, setting.failsafe);
    }else if(screen.cursor == 3){
        setting.channel += delta;
        if(setting.channel > 32)
        {
          setting.channel = 1;
        }else if(setting.channel <1){
          setting.channel = 32;
        }
    }else if(screen.cursor == 4){
        setting.failsafe += delta;
        if(setting.failsafe > 60)
        {
          setting.failsafe = 1;
        }else if(setting.failsafe <1){
          setting.failsafe = 60;
        }
        chiller.setTargetTemp(setting.targetTemp,setting.threshold,setting.autoHeating, setting.failsafe);
    }
    saveConfig();
  }
}