public function complaint_enquiry_submit()
{
    /*
    |--------------------------------------------------------------------------
    | Allow POST Requests Only
    |--------------------------------------------------------------------------
    */
    if (empty($_POST)) {
        redirect('complaint-enquiry');
        return;
    }


    /*
    |--------------------------------------------------------------------------
    | Spam Honeypot Protection
    |--------------------------------------------------------------------------
    */
    $honeypot = trim(
        (string) $this->input->post('website', true)
    );

    if ($honeypot !== '') {

        log_message(
            'error',
            'Complaint form spam blocked from IP: ' .
            $this->input->ip_address()
        );

        redirect('complaint-enquiry');
        return;
    }


    /*
    |--------------------------------------------------------------------------
    | Prevent Repeated Submissions Within 30 Seconds
    |--------------------------------------------------------------------------
    */
    $lastSubmission = (int) $this->session->userdata(
        'last_public_form_submission'
    );

    if (
        $lastSubmission > 0 &&
        (time() - $lastSubmission) < 30
    ) {
        $this->session->set_userdata([
            'public_form_class' => 'danger',
            'public_form_message' =>
                'Please wait 30 seconds before submitting another request.'
        ]);

        redirect('complaint-enquiry');
        return;
    }


    /*
    |--------------------------------------------------------------------------
    | Form Validation Rules
    |--------------------------------------------------------------------------
    */
    $this->form_validation->set_rules(
        'name',
        'Full Name',
        'trim|required|max_length[100]'
    );

    $this->form_validation->set_rules(
        'mobile',
        'Mobile Number',
        'trim|required|regex_match[/^[0-9]{10}$/]'
    );

    $this->form_validation->set_rules(
        'email',
        'Email Address',
        'trim|valid_email|max_length[150]'
    );

    $this->form_validation->set_rules(
        'customer_id',
        'Customer ID / Connection Number',
        'trim|max_length[100]'
    );

    $this->form_validation->set_rules(
        'type',
        'Complaint / Enquiry Type',
        'trim|required|in_list[Complaint,Service Request,Enquiry,New Connection,Other]'
    );

    $this->form_validation->set_rules(
        'subject',
        'Subject',
        'trim|required|max_length[200]'
    );

    $this->form_validation->set_rules(
        'message',
        'Message',
        'trim|required|max_length[2000]'
    );


    /*
    |--------------------------------------------------------------------------
    | Display Validation Errors
    |--------------------------------------------------------------------------
    */
    if (!$this->form_validation->run()) {

        $this->setSeo(
            'Complaint / Enquiry | iGateways',
            'Submit your complaint, service request or enquiry to iGateways.',
            'complaint-enquiry',
            'iGateways complaint, broadband enquiry, internet complaint'
        );

        $this->loadTemplate(
            'complaint-enquiry',
            $this->data
        );

        return;
    }


    /*
    |--------------------------------------------------------------------------
    | Sanitized Form Values
    |--------------------------------------------------------------------------
    */
    $name = $this->input->post(
        'name',
        true
    );

    $mobile = $this->input->post(
        'mobile',
        true
    );

    $email = $this->input->post(
        'email',
        true
    );

    $customerId = $this->input->post(
        'customer_id',
        true
    );

    $type = $this->input->post(
        'type',
        true
    );

    $subject = $this->input->post(
        'subject',
        true
    );

    $message = $this->input->post(
        'message',
        true
    );


    /*
    |--------------------------------------------------------------------------
    | Prepare Database Message
    |--------------------------------------------------------------------------
    */
    $completeMessage =
        "Type: " . $type . "\n" .
        "Customer ID / Connection No.: " .
        (
            !empty($customerId)
                ? $customerId
                : 'Not provided'
        ) .
        "\n" .
        "Subject: " . $subject . "\n\n" .
        "Message:\n" . $message;


    $queryData = [
        'name' => $name,
        'number' => $mobile,
        'email' => $email,
        'message' => $completeMessage
    ];


    /*
    |--------------------------------------------------------------------------
    | Save in Database
    |--------------------------------------------------------------------------
    */
    $this->adminModel->createQuery(
        $queryData
    );


    /*
    |--------------------------------------------------------------------------
    | Store Successful Submission Time
    |--------------------------------------------------------------------------
    */
    $this->session->set_userdata(
        'last_public_form_submission',
        time()
    );


    /*
    |--------------------------------------------------------------------------
    | Prepare Support Email
    |--------------------------------------------------------------------------
    */
    $emailBody = "
        <h2>New Complaint / Enquiry</h2>

        <p>
            <strong>Name:</strong> " .
            htmlspecialchars(
                $name,
                ENT_QUOTES,
                'UTF-8'
            ) .
        "</p>

        <p>
            <strong>Mobile:</strong> " .
            htmlspecialchars(
                $mobile,
                ENT_QUOTES,
                'UTF-8'
            ) .
        "</p>

        <p>
            <strong>Email:</strong> " .
            htmlspecialchars(
                !empty($email)
                    ? $email
                    : 'Not provided',
                ENT_QUOTES,
                'UTF-8'
            ) .
        "</p>

        <p>
            <strong>Type:</strong> " .
            htmlspecialchars(
                $type,
                ENT_QUOTES,
                'UTF-8'
            ) .
        "</p>

        <p>
            <strong>Customer ID:</strong> " .
            htmlspecialchars(
                !empty($customerId)
                    ? $customerId
                    : 'Not provided',
                ENT_QUOTES,
                'UTF-8'
            ) .
        "</p>

        <p>
            <strong>Subject:</strong> " .
            htmlspecialchars(
                $subject,
                ENT_QUOTES,
                'UTF-8'
            ) .
        "</p>

        <p>
            <strong>Message:</strong><br>" .
            nl2br(
                htmlspecialchars(
                    $message,
                    ENT_QUOTES,
                    'UTF-8'
                )
            ) .
        "</p>
    ";


    /*
    |--------------------------------------------------------------------------
    | Send Support Email
    |--------------------------------------------------------------------------
    */
    $this->sendEmail(
        'support@igateways.co.in',
        'New Website Complaint / Enquiry: ' . $subject,
        $emailBody,
        $email
    );


    /*
    |--------------------------------------------------------------------------
    | Set One-Time Success Message
    |--------------------------------------------------------------------------
    */
    $this->session->set_userdata([
        'public_form_class' => 'success',
        'public_form_message' =>
            'Your complaint / enquiry has been submitted successfully.'
    ]);


    /*
    |--------------------------------------------------------------------------
    | Return to Complaint Page
    |--------------------------------------------------------------------------
    */
    redirect('complaint-enquiry');
}<!DOCTYPE html>
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