#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "DHTesp.h"

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

const int DHT_PIN = 15;
DHTesp dhtSensor;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C))
  { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for (;;)
      ;
  }
  
  display.clearDisplay();
  display.setTextColor(WHITE);

  display.setTextSize(2);
  display.setCursor(0,0);
  display.println("GreenTRUST");
  display.setTextSize(1);
  display.println();
  display.println("by");display.println();
  display.println("AdaLovelace Team");
  display.display();

  delay(2000);
  display.display();
}

void tampilan(int volume, float berat, float suhu, int kelembapan){
  display.clearDisplay();
  display.cp437(true);

  display.setTextSize(1);
  display.setCursor(0,0);
  display.print("VOLUME");
  display.setTextSize(2);
  display.setCursor(0,10);
  display.print(volume); display.print("%");

  display.setTextSize(1);
  display.setCursor(68,0);
  display.print("BERAT (kg)");
  display.setTextSize(2);
  display.setCursor(68,10);
  display.print(berat);

  display.setTextSize(1);
  display.setCursor(0,57);
  display.print("SUHU:");display.print(suhu);display.write(0xf8);display.print("C");
  display.print(" KLMB:");display.print(kelembapan);display.print("%");

  // Grafik volume
  display.fillRect(1,32,(int)(((float)volume/100) * 55),12,WHITE);
  display.drawRect(0,31,56,13,WHITE);

  // Grafik berat
  display.fillRect(69,32,(int)((berat/20) * 55),12,WHITE);
  display.drawRect(68,31,56,13,WHITE);

  // Garis kompartemen
  display.drawFastHLine(0,52,128,WHITE);
  display.drawFastVLine(63,0,52,WHITE);

  display.display();
}

void loop() {
  // put your main code here, to run repeatedly:
  int volume = random(0,100);
  float berat = random(0,20);
  // float suhu = random(10,100);
  // int kelembapan = random(0,99);

  TempAndHumidity dataDHT = dhtSensor.getTempAndHumidity();
  
  tampilan(volume,berat,dataDHT.temperature,dataDHT.humidity);
  delay(2000);
}