<?php
if ( ! defined( 'ABSPATH' ) ) exit;

class ACQUIS_Public {

    public function init() {
        add_action( 'wp_enqueue_scripts',          array( $this, 'enqueue_assets' ) );
        add_action( 'wp_footer',                   array( $this, 'render_modal' ) );
        // AJAX: fetch custom form HTML
        add_action( 'wp_ajax_acquis_get_form',        array( $this, 'ajax_get_form' ) );
        add_action( 'wp_ajax_nopriv_acquis_get_form', array( $this, 'ajax_get_form' ) );
        // Phase 4: page-visit tracking beacon (known leads only)
        add_action( 'wp_ajax_acquis_track_visit',        array( $this, 'ajax_track_visit' ) );
        add_action( 'wp_ajax_nopriv_acquis_track_visit', array( $this, 'ajax_track_visit' ) );
    }

    public function enqueue_assets() {
        wp_enqueue_style(
            'acquis-public',
            ACQUIS_PLUGIN_URL . 'public/css/acquis-public.css',
            array(),
            acquis_asset_ver( ACQUIS_PLUGIN_DIR . 'public/css/acquis-public.css' )
        );

        // Global modal design (Settings → Modal Design tab). Only emit an
        // override when the admin has actually changed a color from the
        // built-in default, so sites that never touch this setting get
        // byte-identical output to before this feature existed.
        $header_color = sanitize_hex_color( get_option( 'acquis_modal_header_color', '#0D1B4B' ) ) ?: '#0D1B4B';
        $accent_color = sanitize_hex_color( get_option( 'acquis_modal_accent_color', '#F97316' ) ) ?: '#F97316';
        if ( '#0D1B4B' !== strtoupper( $header_color ) || '#F97316' !== strtoupper( $accent_color ) ) {
            $accent_dark  = self::darken_hex( $accent_color, 0.12 );
            $accent_light = self::lighten_hex( $accent_color, 0.92 );
            $accent_rgb   = self::hex_to_rgb( $accent_color ) ?: array( 249, 115, 22 );
            $rgb_str      = implode( ',', $accent_rgb );

            $custom_css  = ":root{--acquis-primary:{$header_color};--acquis-accent:{$accent_color};--acquis-accent-dark:{$accent_dark};--acquis-accent-light:{$accent_light};}";
            // The selectors below use rgba(249,115,22,…) literals rather
            // than the CSS variables above, so they need an explicit
            // override too, using the same alpha values as the base
            // stylesheet but with the admin's chosen accent color's RGB.
            $custom_css .= ".acquis-modal-lock-icon{background:rgba({$rgb_str},0.18);border-color:rgba({$rgb_str},0.4);}";
            $custom_css .= ".acquis-input:focus,.acquis-custom-form .acquis-field.acquis-input:focus,.acquis-custom-form input.acquis-field:focus,.acquis-custom-form .acquis-textarea:focus,.acquis-custom-form .acquis-select:focus,.acquis-custom-form .acquis-country-select:focus,.acquis-custom-form .acquis-date:focus{box-shadow:0 0 0 3px rgba({$rgb_str},0.15);}";
            $custom_css .= ".acquis-submit-btn:hover:not(:disabled),.acquis-download-final-btn:hover{box-shadow:0 4px 14px rgba({$rgb_str},0.4);}";

            wp_add_inline_style( 'acquis-public', $custom_css );
        }

        wp_enqueue_script(
            'acquis-public',
            ACQUIS_PLUGIN_URL . 'public/js/acquis-public.js',
            array( 'jquery' ),
            acquis_asset_ver( ACQUIS_PLUGIN_DIR . 'public/js/acquis-public.js' ),
            true
        );
        wp_localize_script( 'acquis-public', 'ACQUIS', array(
            'ajaxurl'       => admin_url( 'admin-ajax.php' ),
            'nonce'         => wp_create_nonce( 'acquis_public_nonce' ),
            'delivery_mode' => get_option( 'acquis_delivery_mode', 'both' ),
            'i18n'          => array(
                'submitting'  => __( 'Please wait…', 'acquisitionsuite' ),
                'submit'      => __( 'Get My Download', 'acquisitionsuite' ),
                'pay_now'     => __( 'Continue to Payment', 'acquisitionsuite' ),
                'error_gen'   => __( 'Something went wrong. Please try again.', 'acquisitionsuite' ),
                'email_sent'  => __( '📧 Check your inbox we\'ve sent the download link!', 'acquisitionsuite' ),
                'loading'     => __( 'Loading form…', 'acquisitionsuite' ),
                'load_error'  => __( 'Could not load the form. Please try again.', 'acquisitionsuite' ),
            ),
        ) );
    }

    /**
     * AJAX endpoint returns rendered HTML for a custom form.
     * Called by acquis-public.js whenever a button carries data-form-id > 0.
     */
    public function ajax_get_form() {
        $nonce = isset( $_POST['nonce'] ) ? sanitize_text_field( wp_unslash( $_POST['nonce'] ) ) : '';
        if ( ! wp_verify_nonce( $nonce, 'acquis_public_nonce' ) && ! wp_verify_nonce( $nonce, 'acquis_nonce' ) ) {
            wp_send_json_error( array( 'message' => 'Security check failed.' ), 403 );
        }

        $form_id = absint( $_POST['form_id'] ?? 0 );
        if ( ! $form_id ) {
            wp_send_json_error( array( 'message' => 'No form ID.' ), 400 );
        }

        if ( ! class_exists( 'ACQUIS_Form_Renderer' ) || ! class_exists( 'ACQUIS_P3_DB' ) ) {
            wp_send_json_error( array( 'message' => 'Form system unavailable.' ), 500 );
        }

        $form = ACQUIS_P3_DB::get_form( $form_id );
        if ( ! $form ) {
            wp_send_json_error( array( 'message' => 'Form not found.' ), 404 );
        }

        $html     = ACQUIS_Form_Renderer::render( $form_id );
        $settings = is_array( $form->settings ) ? $form->settings : array();

        // Per-form header settings (fall back to empty = use global defaults)
        $modal_title    = sanitize_text_field( $settings['modal_title']    ?? '' );
        $modal_subtitle = sanitize_text_field( $settings['modal_subtitle'] ?? '' );
        $header_bg      = sanitize_text_field( $settings['header_bg']      ?? '' );
        $title_color    = sanitize_text_field( $settings['title_color']    ?? '' );
        $subtitle_color = sanitize_text_field( $settings['subtitle_color'] ?? '' );

        // Field mapping keys (which field_key acts as name / email for lead record)
        $name_field  = sanitize_key( $settings['name_field']  ?? '' );
        $email_field = sanitize_key( $settings['email_field'] ?? '' );

        wp_send_json_success( array(
            'html'           => $html,
            'steps'          => absint( $form->steps ),
            'title'          => esc_html( $form->title ),
            'modal_title'    => $modal_title,
            'modal_subtitle' => $modal_subtitle,
            'header_bg'      => $header_bg,
            'title_color'    => $title_color,
            'subtitle_color' => $subtitle_color,
            'name_field'     => $name_field,
            'email_field'    => $email_field,
        ) );
    }

    /**
     * Phase 4: lightweight page-visit beacon. Fires the 'page_visit'
     * automation trigger for known leads (identified by the long-lived
     * 'acquis_lead' cookie set at capture time). Anonymous visitors are
     * intentionally ignored here there's no lead to attribute the
     * visit to.
     */
    public function ajax_track_visit() {
        if ( ! check_ajax_referer( 'acquis_nonce', 'nonce', false ) ) {
            wp_send_json_error( null, 403 );
        }

        $lead_id = isset( $_COOKIE['acquis_lead'] ) ? absint( $_COOKIE['acquis_lead'] ) : 0;
        if ( ! $lead_id ) {
            wp_send_json_success(); // nothing to attribute to; not an error
        }

        $url = isset( $_POST['url'] ) ? esc_url_raw( wp_unslash( $_POST['url'] ) ) : '';

        if ( class_exists( 'ACQUIS_P3_DB' ) ) {
            ACQUIS_P3_DB::track_event( 'page_visit', array( 'lead_id' => $lead_id, 'source_url' => $url ) );
        }
        if ( class_exists( 'ACQUIS_Automation_Engine' ) ) {
            $context = array(
                'source_url' => $url,
                'lead_score' => class_exists( 'ACQUIS_Lead_Scorer' ) ? ACQUIS_Lead_Scorer::current_total( $lead_id ) : 0,
            );
            ACQUIS_Automation_Engine::run( 'page_visit', $lead_id, $context );
        }

        wp_send_json_success();
    }

    public function render_modal() {
        $delivery_mode = get_option( 'acquis_delivery_mode', 'both' );
        $email_only    = ( $delivery_mode === 'email' );
        ?>
        <div id="acquis-modal-overlay" class="acquis-modal-overlay" aria-hidden="true" role="dialog" aria-modal="true" aria-labelledby="acquis-modal-title">
            <div class="acquis-modal" id="acquis-modal">
                <button class="acquis-modal-close" id="acquis-modal-close" aria-label="<?php esc_attr_e( 'Close', 'acquisitionsuite' ); ?>">&times;</button>

                <div class="acquis-modal-header">
                    <div class="acquis-modal-lock-icon">
                        <svg class="acquis-icon-file-gate" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="11" width="18" height="11" rx="2" ry="2"/><path d="M7 11V7a5 5 0 0 1 10 0v4"/></svg>
                        <svg class="acquis-icon-standalone" style="display:none;" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M9 12h6M9 16h6M9 8h6M5 3h14a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2z"/></svg>
                    </div>
                    <h2 class="acquis-modal-title" id="acquis-modal-title"><?php echo esc_html( get_option( 'acquis_modal_title', 'Get Instant Access' ) ); ?></h2>
                    <p class="acquis-modal-subtitle" id="acquis-modal-subtitle"><?php echo esc_html( get_option( 'acquis_modal_subtitle', 'Enter your details below to download this file for free.' ) ); ?></p>
                </div>

                <!-- Form state -->
                <div class="acquis-modal-body acquis-state-form" id="acquis-form-state">

                    <div class="acquis-error-banner" id="acquis-error-banner" style="display:none;" role="alert"></div>

                    <!-- Loading indicator while custom form is fetched -->
                    <div id="acquis-form-loading" style="display:none; text-align:center; padding:28px 0;">
                        <div class="acquis-spinner" style="display:inline-block;"></div>
                        <p style="margin:10px 0 0; font-size:13px; color:#6b7280;"><?php esc_html_e( 'Loading form…', 'acquisitionsuite' ); ?></p>
                    </div>

                    <div id="acquis-lead-form" novalidate>

                        <!-- Honeypot -->
                        <div class="acquis-hp-field" aria-hidden="true">
                            <input type="text" name="acquis_hp" id="acquis_hp" tabindex="-1" autocomplete="off" value="">
                        </div>

                        <!-- Hidden tracking fields -->
                        <input type="hidden" id="acquis-file-id"       name="file_id" value="">
                        <input type="hidden" id="acquis-form-id-field" name="form_id" value="0">

                        <!--
                            CUSTOM FORM ZONE
                            When form_id > 0 the JS fetches the custom form HTML
                            and injects it here, hiding #acquis-static-fields.
                        -->
                        <div id="acquis-custom-form-wrap" style="display:none;">
                            <div id="acquis-custom-form-fields"></div>
                        </div>

                        <!-- STATIC (default) fields shown when form_id = 0 -->
                        <div id="acquis-static-fields">
                            <div class="acquis-field-group">
                                <label for="acquis-full-name" class="acquis-label">
                                    <?php esc_html_e( 'Full Name', 'acquisitionsuite' ); ?> <span class="acquis-required">*</span>
                                </label>
                                <div class="acquis-input-wrap">
                                    <svg class="acquis-input-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/><circle cx="12" cy="7" r="4"/></svg>
                                    <input type="text" id="acquis-full-name" name="full_name" class="acquis-input"
                                           placeholder="<?php esc_attr_e( 'e.g. Amara Osei', 'acquisitionsuite' ); ?>"
                                           autocomplete="name">
                                </div>
                                <span class="acquis-field-error" id="acquis-name-error"></span>
                            </div>

                            <div class="acquis-field-group">
                                <label for="acquis-email" class="acquis-label">
                                    <?php esc_html_e( 'Email Address', 'acquisitionsuite' ); ?> <span class="acquis-required">*</span>
                                </label>
                                <div class="acquis-input-wrap">
                                    <svg class="acquis-input-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M4 4h16c1.1 0 2 .9 2 2v12c0 1.1-.9 2-2 2H4c-1.1 0-2-.9-2-2V6c0-1.1.9-2 2-2z"/><polyline points="22,6 12,13 2,6"/></svg>
                                    <input type="email" id="acquis-email" name="email" class="acquis-input"
                                           placeholder="<?php esc_attr_e( 'you@example.com', 'acquisitionsuite' ); ?>"
                                           autocomplete="email">
                                </div>
                                <span class="acquis-field-error" id="acquis-email-error"></span>
                            </div>
                        </div><!-- /#acquis-static-fields -->

                        <button type="button" id="acquis-submit-btn" class="acquis-submit-btn">
                            <svg class="acquis-btn-icon-file-gate" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
                            <svg class="acquis-btn-icon-standalone" style="display:none;" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="22" y1="2" x2="11" y2="13"/><polygon points="22 2 15 22 11 13 2 9 22 2"/></svg>
                            <span id="acquis-btn-text"><?php esc_html_e( 'Get My Download', 'acquisitionsuite' ); ?></span>
                        </button>

                        <p class="acquis-privacy-note">
                            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"/></svg>
                            <?php esc_html_e( 'Your information is secure. No spam, ever.', 'acquisitionsuite' ); ?>
                        </p>

                        <?php if ( '1' === get_option( 'acquis_show_powered_by', '0' ) ) : ?>
                        <p class="acquis-privacy-note" style="margin-top:6px;opacity:.7;">
                            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M12 2L2 7l10 5 10-5-10-5z"/><path d="M2 17l10 5 10-5"/><path d="M2 12l10 5 10-5"/></svg>
                            <?php printf(
                                wp_kses(
                                    /* translators: %s: URL to AcquisitionSuite website */
                                    __( 'Powered by <a href="%s" target="_blank" rel="noopener" style="color:inherit;text-decoration:underline;text-underline-offset:2px;">AcquisitionSuite</a>', 'acquisitionsuite' ),
                                    array( 'a' => array( 'href' => array(), 'target' => array(), 'rel' => array(), 'style' => array() ) )
                                ),
                                'https://acquisitionsuite.ufirstdev.com'
                            ); ?>
                        </p>
                        <?php endif; ?>

                    </div><!-- /#acquis-lead-form -->
                </div><!-- /#acquis-form-state -->

                <!-- Success state -->
                <div class="acquis-modal-body acquis-state-success" id="acquis-success-state" style="display:none;">
                    <div class="acquis-success-icon">
                        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>
                    </div>
                    <h3 class="acquis-success-title"><?php esc_html_e( "You're all set!", 'acquisitionsuite' ); ?></h3>
                    <p class="acquis-success-msg" id="acquis-success-msg"><?php echo esc_html( get_option( 'acquis_success_message', 'Your download is ready!' ) ); ?></p>

                    <?php
                    // Both blocks are always rendered (not an if/else): this
                    // modal is a single shared instance re-used for every
                    // download/standalone trigger on the page, so it can't
                    // know at render time which specific form is about to be
                    // submitted through it, or whether that submission will
                    // even have a file attached at all. showSuccess() in
                    // acquis-public.js decides which block (if either) to
                    // show per-submission, based on the actual response — a
                    // standalone form (no download_url in the response)
                    // hides both, regardless of this site-wide default. The
                    // inline display styles below only set the
                    // before-JS-runs initial state, matching the site's
                    // default delivery mode, exactly as before this fix.
                    ?>
                    <div class="acquis-email-sent-note" id="acquis-email-only-msg" style="<?php echo $email_only ? '' : 'display:none;'; ?>">
                        📧 <?php esc_html_e( "We've sent the download link to your inbox. Please check your email.", 'acquisitionsuite' ); ?>
                    </div>
                    <div class="acquis-download-action" id="acquis-download-action" style="<?php echo $email_only ? 'display:none;' : ''; ?>">
                        <a href="#" id="acquis-download-link" class="acquis-download-final-btn" target="_blank" rel="noopener noreferrer">
                            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
                            <?php esc_html_e( 'Download Now', 'acquisitionsuite' ); ?>
                        </a>
                        <p class="acquis-expiry-note">
                            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg>
                            <?php /* translators: %d: link expiry minutes */ printf( esc_html__( 'Link expires in %d minutes.', 'acquisitionsuite' ), absint( get_option( 'acquis_link_expiry_minutes', 30 ) ) ); ?>
                        </p>
                    </div>
                </div><!-- /#acquis-success-state -->

            </div><!-- /.acquis-modal -->
        </div><!-- /#acquis-modal-overlay -->
        <?php
    }

    /**
     * Darken a #rrggbb hex color by a fraction (0 to 1) toward black.
     * Used to derive the button hover shade from a single admin-chosen
     * accent color, so the admin only has to pick one color instead of
     * also picking a matching hover state.
     */
    private static function darken_hex( $hex, $fraction ) {
        $rgb = self::hex_to_rgb( $hex );
        if ( ! $rgb ) return $hex;
        foreach ( $rgb as &$c ) {
            $c = max( 0, (int) round( $c * ( 1 - $fraction ) ) );
        }
        return self::rgb_to_hex( $rgb );
    }

    /**
     * Lighten a #rrggbb hex color by a fraction (0 to 1) toward white.
     * Used to derive a soft tint background (e.g. behind the lock icon)
     * from a single admin-chosen accent color.
     */
    private static function lighten_hex( $hex, $fraction ) {
        $rgb = self::hex_to_rgb( $hex );
        if ( ! $rgb ) return $hex;
        foreach ( $rgb as &$c ) {
            $c = min( 255, (int) round( $c + ( 255 - $c ) * $fraction ) );
        }
        return self::rgb_to_hex( $rgb );
    }

    private static function hex_to_rgb( $hex ) {
        $hex = ltrim( (string) $hex, '#' );
        if ( 3 === strlen( $hex ) ) {
            $hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
        }
        if ( 6 !== strlen( $hex ) || ! ctype_xdigit( $hex ) ) {
            return null;
        }
        return array(
            hexdec( substr( $hex, 0, 2 ) ),
            hexdec( substr( $hex, 2, 2 ) ),
            hexdec( substr( $hex, 4, 2 ) ),
        );
    }

    private static function rgb_to_hex( array $rgb ) {
        return sprintf( '#%02x%02x%02x', $rgb[0], $rgb[1], $rgb[2] );
    }
}