<?php
/**
 * Email Notifier — Submission Notification Emails
 *
 * Sends a formatted HTML email to the site owner (or configured address)
 * whenever a new form submission is captured with traffic source data.
 *
 * The email includes all form data plus the traffic source details
 * and conversion status, making it easy to see at a glance which
 * ad platform brought the lead.
 *
 * @package TrueConversion
 */

// Prevent direct file access.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * Class FTCON_Email_Notifier
 */
class FTCON_Email_Notifier {

    /**
     * Send Notification Email
     *
     * Sends an email notification about a new form submission.
     * Uses wp_mail() with HTML content type.
     *
     * @param array $entry_data {
     *     The form submission data.
     *
     *     @type string $form_plugin     Form plugin name.
     *     @type string $form_name       Form name.
     *     @type string $submitter_name  Submitter's name.
     *     @type string $submitter_email Submitter's email.
     *     @type string $message_excerpt Message content.
     *     @type string $traffic_source  Traffic source label.
     *     @type string $utm_source      Raw utm_source.
     *     @type string $utm_medium      Raw utm_medium.
     *     @type string $utm_campaign    Raw utm_campaign.
     *     @type string $landing_page    Landing page URL.
     *     @type string $page_url        Page where form was submitted.
     * }
     *
     * @return bool True if email was sent, false otherwise.
     */
    public static function send_notification( $entry_data ) {
        // Get the notification email address.
        $to = get_option( 'ftcon_notification_email', get_option( 'admin_email' ) );

        if ( empty( $to ) || ! is_email( $to ) ) {
            return false;
        }

        // Build the subject line.
        $site_name = get_bloginfo( 'name' );
        $source    = ! empty( $entry_data['traffic_source'] ) ? $entry_data['traffic_source'] : __( 'Unknown', 'forge-trueconversion' );
        $subject = sprintf(
            /* translators: 1: Site name, 2: Traffic source */
            __( '[%1$s] New Form Submission — %2$s', 'forge-trueconversion' ),
            str_replace( array( "\r", "\n" ), '', $site_name ),
            str_replace( array( "\r", "\n" ), '', $source )
        );

        // Build the email body.
        $body = self::build_email_body( $entry_data );

        // Set HTML content type.
        $headers = array(
            'Content-Type: text/html; charset=UTF-8',
        );

        // Send the email.
        return wp_mail( $to, $subject, $body, $headers );
    }

    /**
     * Build Email Body
     *
     * Creates a clean, readable HTML email with the form submission
     * details, traffic source information, and conversion status.
     *
     * @param array $entry_data The form submission data.
     *
     * @return string HTML email body.
     */
    private static function build_email_body( $entry_data ) {
        $name    = ! empty( $entry_data['submitter_name'] ) ? esc_html( $entry_data['submitter_name'] ) : __( '(not provided)', 'forge-trueconversion' );
        $email   = ! empty( $entry_data['submitter_email'] ) ? esc_html( $entry_data['submitter_email'] ) : __( '(not provided)', 'forge-trueconversion' );
        $message = ! empty( $entry_data['message_excerpt'] ) ? esc_html( $entry_data['message_excerpt'] ) : __( '(no message)', 'forge-trueconversion' );
        $source  = ! empty( $entry_data['traffic_source'] ) ? esc_html( $entry_data['traffic_source'] ) : __( 'Direct', 'forge-trueconversion' );

        $form_plugin = ! empty( $entry_data['form_plugin'] ) ? esc_html( $entry_data['form_plugin'] ) : __( 'Unknown', 'forge-trueconversion' );
        $form_name   = ! empty( $entry_data['form_name'] ) ? esc_html( $entry_data['form_name'] ) : __( 'Unnamed Form', 'forge-trueconversion' );

        // Click ID indicator — shows if this lead can be sent to Google Ads.
        $click_id_badge = '';
        if ( ! empty( $entry_data['click_id_type'] ) && 'gclid' === $entry_data['click_id_type'] ) {
            $click_id_badge = '<span style="display:inline-block;background:#dcfce7;color:#166534;padding:2px 8px;border-radius:4px;font-size:12px;font-weight:600;margin-left:8px;">gclid</span>';
        }

        // Build UTM details section.
        $utm_details = '';
        $utm_fields  = array(
            'utm_source'   => __( 'UTM Source', 'forge-trueconversion' ),
            'utm_medium'   => __( 'UTM Medium', 'forge-trueconversion' ),
            'utm_campaign' => __( 'UTM Campaign', 'forge-trueconversion' ),
            'utm_term'     => __( 'UTM Term', 'forge-trueconversion' ),
            'utm_content'  => __( 'UTM Content', 'forge-trueconversion' ),
        );

        foreach ( $utm_fields as $key => $label ) {
            if ( ! empty( $entry_data[ $key ] ) ) {
                $utm_details .= '<tr><td style="padding:6px 12px;color:#666;">' . esc_html( $label ) . '</td>';
                $utm_details .= '<td style="padding:6px 12px;">' . esc_html( $entry_data[ $key ] ) . '</td></tr>';
            }
        }

        // Landing page and referrer.
        $landing_page = ! empty( $entry_data['landing_page'] ) ? esc_url( $entry_data['landing_page'] ) : '';
        $page_url     = ! empty( $entry_data['page_url'] ) ? esc_url( $entry_data['page_url'] ) : '';

        // Build the HTML email.
        $html = '
        <div style="font-family: -apple-system, BlinkMacSystemFont, \'Segoe UI\', Roboto, sans-serif; max-width: 600px; margin: 0 auto; background: #ffffff;">

            <!-- Header -->
            <div style="background: #2563eb; color: #ffffff; padding: 20px 24px; border-radius: 8px 8px 0 0;">
                <h2 style="margin: 0; font-size: 18px; font-weight: 600;">' . __( 'New Form Submission', 'forge-trueconversion' ) . '</h2>
                <p style="margin: 4px 0 0; font-size: 14px; opacity: 0.9;">' . sprintf( /* translators: 1: Form plugin name, 2: Form name */ __( 'via %1$s — %2$s', 'forge-trueconversion' ), $form_plugin, $form_name ) . '</p>
            </div>

            <!-- Traffic Source Banner -->
            <div style="background: #f0f7ff; padding: 16px 24px; border-left: 4px solid #2563eb;">
                <p style="margin: 0; font-size: 13px; color: #666; text-transform: uppercase; letter-spacing: 0.5px;">' . __( 'Traffic Source', 'forge-trueconversion' ) . '</p>
                <p style="margin: 4px 0 0; font-size: 18px; font-weight: 600; color: #1e40af;">' . $source . $click_id_badge . '</p>
            </div>

            <!-- Form Details -->
            <div style="padding: 24px;">
                <h3 style="margin: 0 0 12px; font-size: 14px; color: #666; text-transform: uppercase; letter-spacing: 0.5px;">' . __( 'Contact Details', 'forge-trueconversion' ) . '</h3>
                <table style="width: 100%; border-collapse: collapse;">
                    <tr>
                        <td style="padding: 6px 12px; color: #666; width: 120px;">' . __( 'Name', 'forge-trueconversion' ) . '</td>
                        <td style="padding: 6px 12px; font-weight: 500;">' . $name . '</td>
                    </tr>
                    <tr>
                        <td style="padding: 6px 12px; color: #666;">' . __( 'Email', 'forge-trueconversion' ) . '</td>
                        <td style="padding: 6px 12px;"><a href="mailto:' . esc_attr( $entry_data['submitter_email'] ) . '" style="color: #2563eb;">' . $email . '</a></td>
                    </tr>
                    <tr>
                        <td style="padding: 6px 12px; color: #666; vertical-align: top;">' . __( 'Message', 'forge-trueconversion' ) . '</td>
                        <td style="padding: 6px 12px;">' . nl2br( $message ) . '</td>
                    </tr>
                </table>
            </div>';

        // UTM Details section (only if we have UTM data).
        if ( ! empty( $utm_details ) ) {
            $html .= '
            <div style="padding: 0 24px 24px;">
                <h3 style="margin: 0 0 12px; font-size: 14px; color: #666; text-transform: uppercase; letter-spacing: 0.5px;">' . __( 'UTM Parameters', 'forge-trueconversion' ) . '</h3>
                <table style="width: 100%; border-collapse: collapse; background: #f9fafb; border-radius: 4px;">
                    ' . $utm_details . '
                </table>
            </div>';
        }

        // Page URLs section.
        if ( $landing_page || $page_url ) {
            $html .= '
            <div style="padding: 0 24px 24px;">
                <h3 style="margin: 0 0 12px; font-size: 14px; color: #666; text-transform: uppercase; letter-spacing: 0.5px;">' . __( 'Page Details', 'forge-trueconversion' ) . '</h3>
                <table style="width: 100%; border-collapse: collapse;">';

            if ( $landing_page ) {
                $html .= '<tr><td style="padding:6px 12px;color:#666;">' . __( 'Landing Page', 'forge-trueconversion' ) . '</td>';
                $html .= '<td style="padding:6px 12px;"><a href="' . $landing_page . '" style="color:#2563eb;word-break:break-all;">' . esc_html( $landing_page ) . '</a></td></tr>';
            }
            if ( $page_url ) {
                $html .= '<tr><td style="padding:6px 12px;color:#666;">' . __( 'Form Page', 'forge-trueconversion' ) . '</td>';
                $html .= '<td style="padding:6px 12px;"><a href="' . $page_url . '" style="color:#2563eb;word-break:break-all;">' . esc_html( $page_url ) . '</a></td></tr>';
            }

            $html .= '</table></div>';
        }

        // Footer.
        $html .= '
            <div style="padding: 16px 24px; background: #f9fafb; border-radius: 0 0 8px 8px; border-top: 1px solid #e5e7eb;">
                <p style="margin: 0; font-size: 12px; color: #9ca3af;">
                    ' . __( 'Sent by TrueConversion', 'forge-trueconversion' ) . ' — <a href="' . esc_url( admin_url( 'admin.php?page=forge-trueconversion' ) ) . '" style="color: #2563eb;">' . __( 'View all entries', 'forge-trueconversion' ) . '</a>
                </p>
            </div>

        </div>';

        return $html;
    }

}