/*
  Akvarium – ovladacie centrum (ESP32)  |  Wokwi simulacia
  --------------------------------------------------------
  Demo logiky:
    - 3x DS18B20 (jedna 1-Wire zbernica, GPIO4)
    - PIR pohyb (GPIO13) -> pohybove svetlo so stmievanim
    - 2x PWM stmievatelne svetlo (GPIO25 hlavne, GPIO26 pohybove)
    - 4x rele (GPIO16-19), v simulacii indikovane cervenymi LED
    - 1x analogovy vstup (GPIO34) = simulacia pH/TDS cez potenciometer

  POZOR: Wokwi simuluje hardver a logiku, NIE spojenie s Home Assistantom.
  Na realne nasadenie s HA pouzi ESPHome YAML (viem dodat samostatne).

  Kniznice (zalozka libraries.txt): OneWire, DallasTemperature
*/

#include <OneWire.h>
#include <DallasTemperature.h>

// --- Piny (cisla GPIO) ---
#define PIN_ONEWIRE     4     // 3x DS18B20 na jednej zbernici
#define PIN_PIR         13    // pohybovy senzor
#define PIN_LED_MAIN    25    // hlavne stmievatelne svetlo (PWM)
#define PIN_LED_MOTION  26    // pohybove svetlo (PWM)
#define PIN_WATER       34    // analogovy vstup - pH/TDS (iba ADC1 kvoli WiFi)
const int RELAYS[4] = { 16, 17, 18, 19 };

OneWire oneWire(PIN_ONEWIRE);
DallasTemperature sensors(&oneWire);

// --- Stav ---
unsigned long lastMotionMs = 0;
const unsigned long MOTION_HOLD = 5000;  // svetlo svieti 5 s po poslednom pohybe
int mainBrightness = 40;                 // 0-255 ; v realnom svete riadi slider v HA

void setup() {
  Serial.begin(115200);
  delay(300);
  Serial.println("\n=== Akvarium ovladacie centrum - start ===");

  sensors.begin();
  Serial.printf("Najdenych teplomerov: %d\n", sensors.getDeviceCount());

  pinMode(PIN_PIR, INPUT);
  for (int i = 0; i < 4; i++) {
    pinMode(RELAYS[i], OUTPUT);
    digitalWrite(RELAYS[i], LOW);
  }

  // PWM vystupy – analogWrite je na ESP32 core mapovany na LEDC (0-255)
  analogWrite(PIN_LED_MAIN, 0);
  analogWrite(PIN_LED_MOTION, 0);
}

void loop() {
  // 1) Teploty
  sensors.requestTemperatures();
  float t1 = sensors.getTempCByIndex(0);
  float t2 = sensors.getTempCByIndex(1);
  float t3 = sensors.getTempCByIndex(2);

  // 2) Hlavne svetlo – PWM (v realnom svete slider v Home Assistante)
  analogWrite(PIN_LED_MAIN, mainBrightness);

  // 3) Pohyb -> pohybove svetlo (tlmene, nie na plno)
  if (digitalRead(PIN_PIR) == HIGH) {
    lastMotionMs = millis();
  }
  bool motionActive = (millis() - lastMotionMs) < MOTION_HOLD;
  analogWrite(PIN_LED_MOTION, motionActive ? 80 : 0);

  // 4) Rele – demo logika
  //    rele 1 = chladiaci ventilator: zopne pri T1 > 26 C
  digitalWrite(RELAYS[0], (t1 > 26.0) ? HIGH : LOW);
  digitalWrite(RELAYS[1], LOW);   // volne (napr. cerpadlo)
  digitalWrite(RELAYS[2], LOW);   // volne (napr. ohrievac)
  digitalWrite(RELAYS[3], LOW);   // volne (napr. krmenie)

  // 5) Analogovy vstup vody (simulacia pH cez potenciometer)
  int raw = analogRead(PIN_WATER);          // 0..4095
  float pseudoPh = raw * 14.0 / 4095.0;     // len demo mapovanie 0..14

  // 6) Vypis do serioveho monitora
  Serial.printf("T1=%.1f  T2=%.1f  T3=%.1f C | pohyb=%s | pH~%.2f | rele1=%d\n",
                t1, t2, t3, motionActive ? "ANO" : "nie",
                pseudoPh, digitalRead(RELAYS[0]));

  delay(1000);
}