<?php
    // Only process POST reqeusts.
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
        // Get the form fields and remove whitespace.
        $name = trim($_POST["name"]);
        $email = filter_var(trim($_POST["email"]), FILTER_SANITIZE_EMAIL);
        $subject = trim($_POST["subject"]);
        $message = trim($_POST["message"]);

        // If empty or bad e-mail
        if (empty($name) OR empty($subject) OR empty($message)
                OR !filter_var($email, FILTER_VALIDATE_EMAIL)) {
            // Set a 400 (bad request) response code and exit.
            http_response_code(400);
            echo "Oops! There was a problem with your submission. Please complete the form and try again.";
            exit;
        }


        $recipient = "solarenergynet@gmail.com";
        $subject = "[CONTACT] $subject";

        // Build the email content.
        $email_content = "Name: $name\n";
        $email_content .= "E-mail: $email\n";
        $email_content .= "Message:\n$message\n";
        // Build the email headers.
        $email_headers = "From: $name <$email>";

        // Send the email.
        if (mail($recipient, $subject, $email_content, $email_headers)) {
            // Set a 200 (okay) response code.
            http_response_code(200);
            echo "Thank You! Your message has been sent.";
        } else {
            // Set a 500 (internal server error) response code.
            http_response_code(500);
            echo "Oops! Something went wrong and we couldn't send your message.";
        }

    } else {
        // Not a POST request, set a 403 (forbidden) response code.
        http_response_code(403);
        echo "There was a problem with your submission, please try again.";
    }

?>