script.js

// Assigning all the variables and the API Key and URL
const apiKey = "19f175c397782f927e89a4261b9f3ac5";
const apiUrl = "https://api.openweathermap.org/data/2.5/weather?units=metric&q=";
const searchBox = document.querySelector(".searchbox input");
const searchBtn = document.querySelector(".searchbox button");
const weatherIcon = document.querySelector(".weather-icon");

// Function for the main task (getting the data from API and displaying it)
async function checkWeather(city) {
    const response = await fetch(apiUrl + city + `&appid=${apiKey}`);
    if (response.status == 404) {
        document.querySelector(".error").style.display = "block";
        document.querySelector(".weather").style.display = "none";
        searchBox.value = "";
    } else {
        document.querySelector(".error").style.display = "none";
    }
    
    const data = await response.json();
    document.querySelector(".city").innerHTML = data.name;
    document.querySelector(".temperature").innerHTML = Math.round(data.main.temp) + "°c";
    document.querySelector(".humidity").innerHTML = data.main.humidity + "%";
    document.querySelector(".wind").innerHTML = data.wind.speed + " kmph";

    // Conditions for checking and displaying relevant image according to the weather conditions
    if (data.weather[0].main == "Clouds") {
        weatherIcon.src = "images/clouds.png";
    } else if (data.weather[0].main == "Clear") {
        weatherIcon.src = "images/sun.png";
    } else if (data.weather[0].main == "Rain") {
        weatherIcon.src = "images/rain.png";
    } else if (data.weather[0].main == "Haze") {
        weatherIcon.src = "images/haze.png";
    } else if (data.weather[0].main == "Drizzle") {
        weatherIcon.src = "images/drizzle.png";
    } else if (data.weather[0].main == "Mist") {
        weatherIcon.src = "images/mist.png";
    }
    
    document.querySelector(".weather").style.display = "block";
    searchBox.value = "";  // Clearing the search box once search is done
}

// Event listener for the search button
searchBtn.addEventListener("click", () => {
    checkWeather(searchBox.value);
});

// Enter button (keyCode = 13) event listener
searchBox.addEventListener('keyup', function(event) {
    if (event.keyCode === 13) {
        checkWeather(searchBox.value);
    }
});

// Geolocation-based weather fetching function
async function getWeatherByLocation(lat, lon) {
    const response = await fetch(`https://api.openweathermap.org/data/2.5/weather?lat=${lat}&lon=${lon}&units=metric&appid=${apiKey}`);
    
    if (response.status == 404) {
        document.querySelector(".error").style.display = "block";
        document.querySelector(".weather").style.display = "none";
    } else {
        document.querySelector(".error").style.display = "none";
    }

    const data = await response.json();
    document.querySelector(".city").innerHTML = data.name;
    document.querySelector(".temperature").innerHTML = Math.round(data.main.temp) + "°c";
    document.querySelector(".humidity").innerHTML = data.main.humidity + "%";
    document.querySelector(".wind").innerHTML = data.wind.speed + " kmph";

    // Conditions for checking and displaying relevant image according to the weather conditions
    if (data.weather[0].main == "Clouds") {
        weatherIcon.src = "images/clouds.png";
    } else if (data.weather[0].main == "Clear") {
        weatherIcon.src = "images/sun.png";
    } else if (data.weather[0].main == "Rain") {
        weatherIcon.src = "images/rain.png";
    } else if (data.weather[0].main == "Haze") {
        weatherIcon.src = "images/haze.png";
    } else if (data.weather[0].main == "Drizzle") {
        weatherIcon.src = "images/drizzle.png";
    } else if (data.weather[0].main == "Mist") {
        weatherIcon.src = "images/mist.png";
    }

    document.querySelector(".weather").style.display = "block";
}

// Function to show the current location's weather
function showPosition(position) {
    const lat = position.coords.latitude;
    const lon = position.coords.longitude;
    getWeatherByLocation(lat, lon);
}

// Function to handle geolocation errors
function showError(error) {
    switch (error.code) {
        case error.PERMISSION_DENIED:
            alert("User denied the request for Geolocation.");
            break;
        case error.POSITION_UNAVAILABLE:
            alert("Location information is unavailable.");
            break;
        case error.TIMEOUT:
            alert("The request to get user location timed out.");
            break;
        case error.UNKNOWN_ERROR:
            alert("An unknown error occurred.");
            break;
    }
}

// Automatically fetch weather for the current location when the page loads
window.onload = function () {
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(showPosition, showError);
    } else {
        alert("Geolocation is not supported by this browser.");
    }
}