<?php

if (!defined('ABSPATH')) {
    exit;
}

class AdGhost_Ad_Container {

    const FORMAT_OF_BEHAVIOUR = [
        'float' => 'floating',
    ];

    const CONTENT_ZONES = ['incontent', 'before_content', 'after_content'];

    const WRAP_ZONES = ['incontent', 'before_content', 'after_content', 'selector', 'shortcode', 'hook'];

    public static function render(array $unit, $zone, $index = 0) {
        $unit    = AdGhost_Helper::normalize_unit($unit);
        $slot_id = sanitize_html_class('adghost-' . str_replace('_', '-', $zone) . '-' . (int) $index);

        $sizes = str_replace(';', ',', (string) ($unit['sizes'] ?? '300x250'));

        if (in_array($zone, self::CONTENT_ZONES, true) && class_exists('AdGhost_Content_Analyzer')) {
            $sizes = str_replace(';', ',', AdGhost_Content_Analyzer::filter_sizes($sizes, AdGhost_Content_Analyzer::content_max_width()));
        }

        if (class_exists('AdGhost_AMP') && AdGhost_AMP::is_amp()) {
            return AdGhost_AMP::ad($unit, $zone, $sizes);
        }

        $align = $unit['align'];
        if (strpos($align, 'float-') === 0 && !in_array($zone, self::WRAP_ZONES, true)) {
            $align = 'center';
        }

        $classes = [
            'adghost-ad-container',
            'adghost-' . str_replace('_', '-', $zone),
            'adghost-align-' . $align,
        ];

        $attrs = [
            'class'                 => implode(' ', $classes),
            'id'                    => $slot_id,
            'data-adghost-slot'     => $slot_id,
            'data-adghost-id'       => (string) ($unit['id'] ?? ''),
            'data-adghost-unit'     => AdGhost_Helper::gam_code($unit),
            'data-adghost-name'     => (string) ($unit['name'] ?? ''),
            'data-adghost-sizes'    => $sizes,
            'data-adghost-position' => $zone,
            'data-adghost-index'    => (string) (int) $index,
        ];

        $feature = AdGhost_Helper::served_feature($unit);
        $formats = self::behaviour_formats();
        if (isset($formats[$feature])) {
            $attrs['data-adghost-format'] = $formats[$feature];
            if ($feature === 'float') {

                $corner = (string) ($unit['corner'] ?? 'bottom-right');
                $attrs['data-adghost-corner'] = in_array($corner, ['bottom-right', 'bottom-left', 'top-right', 'top-left'], true) ? $corner : 'bottom-right';
            }
        }

        $rides = $feature === 'sticky' || $feature === 'elevator';

        $label = self::label();
        if ($label !== '') {
            $attrs['class'] .= ' adghost-has-label';
            $attrs['data-adghost-label'] = $label;
        }

        $spacing = self::spacing($unit);
        $pad     = (int) ($spacing['padding'] ?? 0);

        $style  = '';
        $height = self::reserved_height($sizes);
        if ($height > 0) {

            $style .= 'min-height:' . ($height + ($label !== '' ? self::LABEL_HEIGHT : 0) + 2 * $pad) . 'px;';
        }

        $phone_height = self::reserved_height($sizes, self::PHONE_WIDTH);
        if ($height > 0 && $phone_height !== $height) {
            $attrs['data-adghost-phone-h'] = '1';
            $style .= '--adghost-phone-h:' . ($phone_height > 0 ? $phone_height + ($label !== '' ? self::LABEL_HEIGHT : 0) + 2 * $pad : 0) . 'px;';
        }
        if ($spacing['padding'] !== null) {
            $style .= 'box-sizing:border-box;padding:' . $pad . 'px;';
        }

        if (!$rides) {
            $style .= self::margin_style($spacing);
        }

        $widest = self::widest($sizes);
        if ($widest > 0) {

            $style .= '--adghost-preview-w:' . $widest . 'px;';
        }

        if ($rides) {

            $attrs['class'] .= ' adghost-sticky' . (($unit['elevatorAlign'] ?? 'top') === 'center' ? ' adghost-ride-center' : '');
            $style .= '--adghost-sticky-top:' . min(400, absint($unit['stickyOffset'] ?? 16)) . 'px;--adghost-ad-h:' . max(50, $height + ($label !== '' ? self::LABEL_HEIGHT : 0) + 2 * $pad) . 'px;';
        }
        if ($style !== '') {
            $attrs['style'] = $style;
        }

        $attrs = (array) apply_filters('adghost_container_attributes', $attrs, $unit, $zone);

        if ($unit['devices'] !== '' && class_exists('AdGhost_Targeting') && AdGhost_Targeting::device_mode() === 'browser') {
            $attrs['data-adghost-devices'] = str_replace(',', ' ', $unit['devices']);
        }

        $html = '<div';
        foreach ($attrs as $name => $value) {
            $html .= ' ' . $name . '="' . esc_attr($value) . '"';
        }
        $html .= '></div>';

        if ($rides) {
            $travel = self::travel_height($unit, $height + ($label !== '' ? self::LABEL_HEIGHT : 0) + 2 * $pad);
            $width  = self::widest($sizes);

            $html   = '<div class="adghost-shaft adghost-shaft-' . esc_attr(str_replace('_', '-', $zone)) . ' adghost-shaft-align-' . esc_attr($align)
                . '"' . (isset($attrs['data-adghost-devices']) ? ' data-adghost-devices="' . esc_attr($attrs['data-adghost-devices']) . '"' : '')
                . ' style="height:' . $travel . 'px;' . ($width > 0 ? 'width:' . ($width + 2 * $pad) . 'px;' : '') . self::margin_style($spacing) . '">' . $html . '</div>';
        }

        return $html;
    }

    const PHONE_WIDTH = 479;

    const SPACING_MAX = 200;

    public static function spacing(array $unit) {
        $read = function ($key) use ($unit) {
            if (!isset($unit[$key]) || $unit[$key] === '' || $unit[$key] === null || !is_numeric($unit[$key])) {
                return null;
            }
            return (int) min(self::SPACING_MAX, max(0, (int) $unit[$key]));
        };
        return ['above' => $read('spaceAbove'), 'below' => $read('spaceBelow'), 'padding' => $read('innerPadding')];
    }

    public static function margin_style(array $spacing) {
        return ($spacing['above'] !== null ? 'margin-top:' . $spacing['above'] . 'px;' : '')
            . ($spacing['below'] !== null ? 'margin-bottom:' . $spacing['below'] . 'px;' : '');
    }

    const LABEL_HEIGHT = 18;

    const BOX_LABEL_HEIGHT = 0;

    public static function widest($sizes) {
        $width = 0;
        foreach (preg_split('/[;,]/', (string) $sizes) as $size) {
            if (preg_match('/^\s*(\d+)\s*x\s*(\d+)\s*$/i', $size, $m) && (int) $m[1] > 1) {
                $width = max($width, (int) $m[1]);
            }
        }
        return $width;
    }

    const TRAVEL_DEFAULT = 600;

    public static function travel_height(array $unit, $ad_height) {
        $travel = absint($unit['travelHeight'] ?? 0) ?: self::TRAVEL_DEFAULT;
        return (int) min(3000, max($travel, (int) $ad_height + 150));
    }

    public static function behaviour_formats() {
        return (array) apply_filters('adghost_behaviour_formats', self::FORMAT_OF_BEHAVIOUR);
    }

    public static function reserved_height($sizes, $max_width = 0) {
        $mode = AdGhost_Helper::cls_mode();
        if ($mode === 'off') {
            return 0;
        }
        $heights = [];
        foreach (preg_split('/[;,]/', (string) $sizes) as $size) {
            if (preg_match('/^\s*(\d+)\s*x\s*(\d+)\s*$/i', $size, $m) && (int) $m[1] > 1
                && ($max_width <= 0 || (int) $m[1] <= $max_width)) {
                $heights[] = (int) $m[2];
            }
        }
        if (!$heights) {
            return 0;
        }
        return $mode === 'min' ? min($heights) : max($heights);
    }

    public static function label() {
        $type = get_option('adghost_ad_label_type', 'default');
        if ($type === 'hidden') {
            return '';
        }
        if ($type === 'custom') {
            $custom = trim((string) get_option('adghost_ad_label_custom', ''));
            return $custom !== '' ? $custom : 'Advertisement';
        }
        return 'Advertisement';
    }
}