#include <WiFi.h>
#include <ESP32Servo.h>
#include <time.h>

const int servoPin = 18; // Pin to connect the servo
const int ldrPin = 34; // Pin to connect the LDR (Analog input)
Servo myServo; // Create a Servo object

// WiFi credentials
const char* ssid = "Wokwi-GUEST"; // Replace with your WiFi SSID
const char* password = ""; // Replace with your WiFi Password

// Time zone settings
const char* timeServer = "pool.ntp.org"; // NTP server
const long gmtOffset_sec = 3600; // Set time zone offset in seconds
const int daylightOffset_sec = 3600; // Daylight saving offset 

void setup() {
    Serial.begin(115200); // Initialize serial communication
    myServo.attach(servoPin); // Attach the Servo to the defined pin
    Serial.begin(115200);
    setTime(2022, 12, 6, 10, 30, 5); // Set to December 6, 2022, 17:30:05

    // LDR pin setup
    pinMode(ldrPin, INPUT); // Set the LDR pin as an input

    // WiFi connection
    WiFi.begin(ssid, password); // Connect to WiFi
    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
        Serial.print(".");
    }
    Serial.println("WiFi connected.");
    
    // Initialize NTP
    configTime(gmtOffset_sec, daylightOffset_sec, timeServer);
}

void setTime(int yr, int month, int mday, int hr, int minute, int sec) {
    struct tm tm;
    tm.tm_year = yr - 1900;  // Year since 1900
    tm.tm_mon = month - 1;   // Month from 0 to 11
    tm.tm_mday = mday;       // Day of the month
    tm.tm_hour = hr;         // Hour
    tm.tm_min = minute;      // Minute
    tm.tm_sec = sec;         // Second
    time_t t = mktime(&tm);  // Convert to time_t
    struct timeval now = { .tv_sec = t };
    settimeofday(&now, NULL); // Set the current time
}

void loop() {
    struct tm timeinfo;

    if (!getLocalTime(&timeinfo)) {
        Serial.println("Failed to obtain time");
        delay(1000);
        return;
    }

    int hour = timeinfo.tm_hour; // Get current hour
    int minute = timeinfo.tm_min; // Get current minute
    int angle = 0; // Initialize the servo angle

    // Read LDR value
    int ldrValue = analogRead(ldrPin); // Read the value from the LDR
    Serial.print("LDR value: ");
    Serial.println(ldrValue); // Output the LDR value to the Serial Monitor

    // Check if the LDR value is above the threshold (200)
    if (ldrValue > 200) {
        // Determine servo angle based on the time
        if (hour == 7 && minute == 0) {
            angle = 40; // 7 AM
        }
        else if (hour == 10 && minute == 0) {
            angle = 90; // 10 AM
        }
        else if (hour == 15 && minute == 0) { // 3 PM
            angle = 150;
        }
        else if (hour == 18 && minute == 0) { // 6 PM
            angle = 180;
        }
        else if (hour == 19 && minute == 0) { // 7 PM
            angle = 0; // Reset
        }

        if (angle != 0) { // Change servo position if an angle is set
            myServo.write(angle); // Set the servo position
            Serial.print("Servo angle set to: ");
            Serial.println(angle); // Output the angle to the Serial Monitor
            delay(1000); // Delay to avoid rapid changes
        }
    } else {
        Serial.println("LDR value below threshold, servo not adjusted.");
    }

    delay(10000); // Wait before the next check (10 seconds)
}