/*
  Project:      ESP32-C3 Aquarium Controller
  Description:  See ReadMe.txt
  Author:       AnonEngineering
  Date:         9/23/26
  License:      Beerware
*/

#include <SPI.h>
#include <WiFi.h>
#include <TimeLib.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Adafruit_NeoPixel.h>
#include <Adafruit_ILI9341.h>
#include <Adafruit_GFX.h>
#include "secrets.h"

#define ONE_WIRE_BUS 3
#define TFT_DC 5
#define TFT_CS 7

const int SCREEN_WIDTH =  320;
const int SCREEN_HEIGHT = 240;
const int ONE_SECOND  = 1000; // time interval
const int DL_OFFSET_SEC = 3600; // daylight savings offset
const long  GMT_OFFSET_SEC = -(5 * 60) * 60; // GMT offset (EST is -5)
const char* NTP_ADDR = "pool.ntp.org";

unsigned long lastTime = 0;

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

void centerText(const char* text, int y) {
  int16_t x1, y1;
  uint16_t textWidth, textHeight;

  tft.getTextBounds(text, 0, y, &x1, &y1, &textWidth, &textHeight);
  int16_t x = (SCREEN_WIDTH - textWidth) / 2;

  tft.setCursor(x, y);
  tft.print(text);
}

void connectWiFi()  {
  static bool symbol = false;
  char buffer[24];

  strncpy(buffer, "Connecting to", 24);
  //centerText(buffer, 10);
  Serial.print(buffer);
  Serial.print(" ");
  //centerText(ssid, 30);
  Serial.println(ssid);
  //oled.display();

  WiFi.begin(ssid, pass, 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    //Serial.print(WiFi.status());
    symbol = !symbol;
    //oled.setCursor(63, 50);
    //oled.print(symbol ? "X" : "+");
    //oled.display();
  }
  Serial.println("");
  //oled.clearDisplay();

  strncpy(buffer, "WiFi connected.", 24);
  //centerText(buffer, 32);
  Serial.println(buffer);
  //oled.display();
  delay(1000);
  //oled.clearDisplay();
}

void printLocalTime(bool mode24) {
  char buffer[24];

  time_t rawtime;
  struct tm * timeinfo;

  time (&rawtime);
  timeinfo = localtime (&rawtime);

  if (!getLocalTime(timeinfo)) {
    Serial.println("Failed to obtain time");
    return;
  }

  if (mode24) {
    strftime (buffer, 24, " %H:%M:%S ", timeinfo);
  } else  {
    strftime (buffer, 24, "%I:%M:%S%p", timeinfo);
  }
  //Serial.print(buffer);
  centerText(buffer, 30);

  strftime (buffer, 16, "%A", timeinfo);
  centerText(buffer, 5);
  //Serial.print("\t");
  //Serial.print(buffer);
  //Serial.print(", ");

  strftime (buffer, 24, "%B %d, %Y", timeinfo);
  //Serial.println(buffer);
  centerText(buffer, 55);
}

void setup() {
  Serial.begin(115200);
  sensors.begin();
  SPI.begin();
  tft.begin();

  tft.setRotation(1);
  tft.setTextColor(ILI9341_GREEN, ILI9341_BLACK); // White text on a black background
  tft.setTextSize(2);

  // Connect to Wi-Fi
  connectWiFi();
  configTime(GMT_OFFSET_SEC, DL_OFFSET_SEC, NTP_ADDR);

}

void loop() {
  //bool is24h = digitalRead(MODE_SW_PIN);
  if (millis() - lastTime >= ONE_SECOND)  {
    lastTime = millis();
    printLocalTime(true);
    sensors.requestTemperatures();
    float tempC = sensors.getTempCByIndex(0);
    Serial.print("Temperature: ");
    Serial.print(tempC);
    Serial.println(" °C");
    //delay(1000);
  }
}