#include <WiFi.h>

#define MOISTURE_PIN 34
#define NUTRIENT_PIN 35
#define RELAY_PIN 26
#define STATUS_LED 25
#define FERT_LED 27
#define BUTTON_PIN 14

bool autoMode = true;

int moistureThreshold = 2500;
int nutrientThreshold = 2500;

String apiKey = "YOUR_API_KEY";
const char* server = "api.thingspeak.com";

WiFiClient client;

void setup() {
  Serial.begin(115200);

  pinMode(RELAY_PIN, OUTPUT);
  pinMode(STATUS_LED, OUTPUT);
  pinMode(FERT_LED, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  WiFi.begin("Wokwi-GUEST", "");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi Connected");
}

void loop() {

  // Mode toggle
  if (digitalRead(BUTTON_PIN) == LOW) {
    autoMode = !autoMode;
    delay(500);
  }

  int moisture = analogRead(MOISTURE_PIN);
  int nutrient = analogRead(NUTRIENT_PIN);

  Serial.println("------ SENSOR DATA ------");
  Serial.print("Moisture: ");
  Serial.println(moisture);

  Serial.print("Nutrient: ");
  Serial.println(nutrient);

  int moisturePercent = map(moisture, 0, 4095, 100, 0);
  Serial.print("Moisture %: ");
  Serial.println(moisturePercent);

  // AUTO MODE
  if (autoMode) {

    if (moisture < moistureThreshold) {
      digitalWrite(RELAY_PIN, HIGH);
      digitalWrite(STATUS_LED, HIGH);
    } else {
      digitalWrite(RELAY_PIN, LOW);
      digitalWrite(STATUS_LED, LOW);
    }

    if (nutrient < nutrientThreshold) {
      digitalWrite(FERT_LED, HIGH);
    } else {
      digitalWrite(FERT_LED, LOW);
    }

  } else {
    digitalWrite(RELAY_PIN, LOW);
    digitalWrite(FERT_LED, LOW);
  }

  // ThingSpeak
  if (client.connect(server, 80)) {
    String url = "/update?api_key=" + apiKey;
    url += "&field1=" + String(moisture);
    url += "&field2=" + String(nutrient);

    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
                 "Host: " + server + "\r\n" +
                 "Connection: close\r\n\r\n");

    client.stop();
  }

  delay(15000);
}