<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'php_mailer/Exception.php';
require 'php_mailer/PHPMailer.php';
require 'php_mailer/SMTP.php';

$recipient_address = "gitanjali.cp@gmail.com"; // Recipient's email address

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $mail_type = isset($_POST['mail_type']) ? trim($_POST['mail_type']) : '';

    if (empty($mail_type)) {
        echo json_encode(['status' => false, 'message' => 'Form type not provided.']);
        exit;
    }

    $mail = new PHPMailer(true);

    try {
        $mail->isSMTP();
        $mail->Host = 'smtp.gmail.com';
        $mail->SMTPAuth = true;
        $mail->Username = 'waytoadmissions21@gmail.com';
        $mail->Password = 'lgle pkre mzzy sebw';
        $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;
        $mail->Port = 465;
        $mail->isHTML(true);

        $name = isset($_POST['name']) ? trim($_POST['name']) : '';
        $email = isset($_POST['email']) ? trim($_POST['email']) : '';
        $phone = isset($_POST['phone']) ? trim($_POST['phone']) : '';
        $course = isset($_POST['course']) ? trim($_POST['course']) : '';
        $address = isset($_POST['address']) ? trim($_POST['address']) : ''; // Admission form uses 'address' as message field
        $dob = isset($_POST['dob']) ? trim($_POST['dob']) : '';
        $gender = isset($_POST['gender']) ? trim($_POST['gender']) : '';
        $qualification = isset($_POST['qualification']) ? trim($_POST['qualification']) : '';

        // Validate common fields
        $errors = validateCommonFields($name, $email, $phone, $course, $address); // Using address instead of message for admission form

        if (!empty($errors)) {
            echo json_encode(['status' => false, 'message' => implode(", ", $errors)]);
            exit;
        }

        $mail_subject = ($mail_type === 'admission_form') 
            ? 'Admission Form Submission - ' . date('d-m-Y') 
            : 'Enquiry Form Submission - ' . date('d-m-Y');

        $mail_body = createMailBody($name, $email, $phone, $course, $address, $dob, $gender, $qualification);

        $mail->setFrom($email, $name);
        $mail->addAddress($recipient_address);
        $mail->Subject = $mail_subject;
        $mail->Body = $mail_body;

        $mail->send();
        echo json_encode(['status' => true, 'message' => 'Your message has been sent successfully!']);
    } catch (Exception $e) {
        echo json_encode(['status' => false, 'message' => 'Message could not be sent. Error: ' . $mail->ErrorInfo]);
    }
}

function validateCommonFields($name, $email, $phone, $course, $address) {
    $errors = [];

    if (empty($name)) {
        $errors[] = "Name is required.";
    }

    if (empty($email)) {
        $errors[] = "Email is required.";
    } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        $errors[] = "Invalid email format.";
    }

    if (empty($phone)) {
        $errors[] = "Phone number is required.";
    } elseif (!preg_match("/^[0-9]{10,15}$/", $phone)) {
        $errors[] = "Phone number must be between 10 and 15 digits.";
    }

    if (empty($course)) {
        $errors[] = "Course is required.";
    }

    if (empty($address)) {
        $errors[] = "Address is required.";
    } elseif (strlen($address) < 10) {
        $errors[] = "Address must be at least 10 characters.";
    }

    return $errors;
}

function createMailBody($name, $email, $phone, $course, $address, $dob, $gender, $qualification) {
    $body = "Name: " . htmlspecialchars($name) . "<br>";
    $body .= "Email: " . htmlspecialchars($email) . "<br>";
    $body .= "Phone: " . htmlspecialchars($phone) . "<br>";
    $body .= "Course: " . htmlspecialchars($course) . "<br>";

    if (!empty($dob)) {
        $body .= "Date of Birth: " . htmlspecialchars($dob) . "<br>";
    }

    if (!empty($gender)) {
        $body .= "Gender: " . htmlspecialchars($gender) . "<br>";
    }

    if (!empty($qualification)) {
        $body .= "Qualification: " . htmlspecialchars($qualification) . "<br>";
    }

    if (!empty($address)) {
        $body .= "Address: " . htmlspecialchars($address) . "<br>";
    }

    return $body;
}

?>