{{-- resources/views/partials/seo.blade.php --}}
@php
    use Illuminate\Support\Str;
    use Illuminate\Support\Carbon;

    /**
     * Inputs (all optional):
     * - $seoMeta  (array)  : manual overrides (meta_title, meta_description, meta_keywords, robots, canonical)
     * - $pageModel(Model)  : Product / Article / Category ... or null for static pages
     * - $config  (array)   : site config (site_title, site_description, site_keywords, site_name, currency, default_og_image)
     * - $canonical (string): explicit canonical URL
     */

    $conf   = is_array($config ?? null) ? $config : [];
    $model  = $pageModel ?? null;
    $manual = is_array($seoMeta  ?? null) ? $seoMeta : [];

    // Helpers
    $isObj = is_object($model);

    $clean = function ($v) {
        return trim(preg_replace('/\s+/u', ' ', strip_tags((string)$v)));
    };
    $limit = function ($v, $len = 160) use ($clean) {
        $t = $clean($v);
        return Str::limit($t, $len, '…');
    };

    // نوع مدل (ایمن)
    $table = ($isObj && method_exists($model, 'getTable')) ? $model->getTable() : null;
    $isProduct  = $table === 'products';
    $isArticle  = $table === 'articles';
    $isCategory = $table === 'categories';

    // صفحهٔ اصلی؟
    // اگر route name داری (مثلاً 'home') می‌تونی از routeIs استفاده کنی
    $isHome = url()->current() === url('/');

    // seo_metas مرتبط با مدل (ایمن)
    $attachedSeo = null;
    if ($isObj) {
        if (isset($model->seoMeta)) {
            $attachedSeo = $model->seoMeta;
        } elseif (method_exists($model, 'seoMeta')) {
            try { $attachedSeo = $model->seoMeta; } catch (\Throwable $e) {}
        } elseif (method_exists($model, 'seoMetas')) {
            try { $attachedSeo = $model->seoMetas()->latest()->first(); } catch (\Throwable $e) {}
        }
    }

    // انتخاب مقدار از: دستی ← seo_metas ← مدل ← fallback
    $pick = function ($keys, $fallback = null) use ($manual, $attachedSeo, $model, $isObj) {
        foreach ((array)$keys as $k) {
            if (array_key_exists($k, $manual) && filled($manual[$k])) return $manual[$k];
            if ($attachedSeo && isset($attachedSeo->$k) && filled($attachedSeo->$k)) return $attachedSeo->$k;
            if ($isObj && isset($model->$k) && filled($model->$k)) return $model->$k;
        }
        return $fallback;
    };

    // ----- Title با برند -----
    $siteTitle = $conf['site_title'] ?? config('app.name', 'Website');
    $pageTitle = $pick(['meta_title', 'title'], null);

    if ($isHome) {
        $title = $siteTitle; // فقط نام سایت برای صفحهٔ اصلی
    } elseif ($pageTitle) {
        $title = $pageTitle . ' - ' . $siteTitle; // سایر صفحات: عنوان + نام سایت
    } else {
        $title = $siteTitle;
    }

    // ----- Description -----
    $desc = $pick(['meta_description', 'short_description', 'description'], $conf['site_description'] ?? '');
    $desc = $limit($desc, 160);

    // ----- Keywords (merge + unique) -----
    $kwCandidates = [
        $manual['meta_keywords'] ?? null,
        $attachedSeo->meta_keywords ?? null,
        $isObj ? ($model->keywords ?? null) : null,
        $isObj ? ($model->tags ?? null)     : null,
        $conf['site_keywords'] ?? null,
    ];
    $kwList = [];
    foreach ($kwCandidates as $kwStr) {
        if (!filled($kwStr)) continue;
        $parts = preg_split('/[,،]/u', $kwStr);
        foreach ($parts as $p) {
            $p = trim($p);
            if ($p !== '' && !in_array($p, $kwList, true)) $kwList[] = $p;
        }
    }
    $keywords = implode(', ', $kwList);

    // ----- Canonical -----
    // manual['canonical'] اگر URL باشد → همان
    // اگر manual/attachedSeo canonical == 0 → اصلاً خروجی نده
    // وگرنه → $canonical یا آدرس فعلی
    $emitCanonical = true;
    $canonicalUrl  = null;

    if (array_key_exists('canonical', $manual)) {
        if (is_string($manual['canonical']) && preg_match('#^https?://#i', $manual['canonical'])) {
            $canonicalUrl = $manual['canonical'];
            $emitCanonical = true;
        } elseif ((string)$manual['canonical'] === '0') {
            $emitCanonical = false;
        }
    }
    if (is_null($canonicalUrl)) {
        $canonicalUrl = $canonical ?? request()->url();
    }
    if ($attachedSeo && isset($attachedSeo->canonical) && (string)$attachedSeo->canonical === '0') {
        $emitCanonical = false;
    }

    // ----- Robots -----
    if (array_key_exists('robots', $manual) && is_string($manual['robots'])) {
        $robots = $manual['robots']; // استفاده از رشتهٔ دستی
    } else {
        // پیش‌فرض: اگر index/follow در seo_metas نبود → true
        $seoIndex  = null;
        $seoFollow = null;

        if ($attachedSeo) {
            if (isset($attachedSeo->index))  $seoIndex  = (int)$attachedSeo->index;
            if (isset($attachedSeo->follow)) $seoFollow = (int)$attachedSeo->follow;
        }
        $seoIndex  = is_null($seoIndex)  ? 1 : (int)$seoIndex;
        $seoFollow = is_null($seoFollow) ? 1 : (int)$seoFollow;

        // Auto-index بر اساس وضعیت انتشار
        $autoIndex = true;
        if ($isProduct && $isObj && isset($model->status)) {
            $autoIndex = ((int)$model->status === 1);
        }
        if ($isArticle && $isObj && isset($model->publish_date) && filled($model->publish_date)) {
            try {
                $publishAt = Carbon::parse($model->publish_date);
                if ($publishAt->isFuture()) $autoIndex = false;
            } catch (\Throwable $e) {}
        }
        if ($isObj && method_exists($model, 'getAttribute') && $model->getAttribute('deleted_at')) {
            $autoIndex = false;
        }

        $finalIndex  = ($seoIndex === 1) && $autoIndex;
        $finalFollow = ($seoFollow === 1);
        $robots = ($finalIndex ? 'index' : 'noindex') . ', ' . ($finalFollow ? 'follow' : 'nofollow');
    }

    // ----- Open Graph / Twitter -----
    $siteName = $conf['site_name'] ?? $siteTitle;
    $ogType   = $isProduct ? 'product' : ($isArticle ? 'article' : 'website');

    $ogImage = null;
    if ($isObj) {
        foreach (['primary_image_url','main_image_url','image_url','thumbnail_url','image'] as $imgField) {
            if ($ogImage) break;
            if (isset($model->$imgField) && filled($model->$imgField)) {
                $ogImage = $model->$imgField;
            } elseif (method_exists($model, $imgField)) {
                try { $ogImage = $model->$imgField(); } catch (\Throwable $e) {}
            }
        }
    }
    if (!$ogImage && !empty($conf['default_og_image'])) {
        $ogImage = $conf['default_og_image'];
    }

    // ----- JSON-LD -----
    $prune = function ($arr) use (&$prune) {
        if (!is_array($arr)) return $arr;
        $out = [];
        foreach ($arr as $k=>$v) {
            if (is_array($v)) { $v = $prune($v); if ($v === []) continue; }
            if ($v !== null && $v !== '') $out[$k] = $v;
        }
        return $out;
    };

    $jsonLd = null;
    if ($isProduct) {
        $currency = $conf['currency'] ?? 'IRR';
        $offers = [];
        if ($isObj && isset($model->product_price) && (int)$model->product_price > 0) {
            $offers = [
                '@type' => 'Offer',
                'priceCurrency' => $currency,
                'price' => (string) $model->product_price,
                'availability' => 'https://schema.org/InStock',
                'url' => $canonicalUrl,
            ];
        }

        $brandName = null;
        if ($isObj && (isset($model->brand) || isset($model->brand_id))) {
            try { $brandName = optional($model->brand)->title; } catch (\Throwable $e) {}
        }

        $categoryName = null;
        if ($isObj && (isset($model->category) || isset($model->category_id))) {
            try { $categoryName = optional($model->category)->title; } catch (\Throwable $e) {}
        }

        $jsonLd = [
            '@context'    => 'https://schema.org',
            '@type'       => 'Product',
            'name'        => $clean($pageTitle ?: $siteTitle),
            'description' => $clean($desc),
            'sku'         => $isObj ? ($model->vendor_code ?? null) : null,
            'brand'       => $brandName ? ['@type'=>'Brand','name'=>$clean($brandName)] : null,
            'category'    => $categoryName ? $clean($categoryName) : null,
            'image'       => $ogImage ? [$ogImage] : null,
            'offers'      => $offers ?: null,
            'url'         => $canonicalUrl,
        ];
    } elseif ($isArticle) {
        $jsonLd = [
            '@context'        => 'https://schema.org',
            '@type'           => 'Article',
            'headline'        => $clean($pageTitle ?: $siteTitle),
            'description'     => $clean($desc),
            'datePublished'   => ($isObj && isset($model->publish_date)) ? (string)$model->publish_date : null,
            'image'           => $ogImage ? [$ogImage] : null,
            'mainEntityOfPage'=> $canonicalUrl,
        ];
    } elseif ($isCategory) {
        $jsonLd = [
            '@context'    => 'https://schema.org',
            '@type'       => 'CollectionPage',
            'name'        => $clean($pageTitle ?: $siteTitle),
            'description' => $clean($desc),
            'url'         => $canonicalUrl,
        ];
    } else {
        // صفحات استاتیک بدون مدل
        $jsonLd = [
            '@context'    => 'https://schema.org',
            '@type'       => 'WebPage',
            'name'        => $clean($pageTitle ?: $siteTitle),
            'description' => $clean($desc),
            'url'         => $canonicalUrl,
        ];
    }
    if ($jsonLd) $jsonLd = $prune($jsonLd);
@endphp

<title>{{ $title }}</title>
<meta name="description" content="{{ $desc }}">
@if(!empty($keywords))
    <meta name="keywords" content="{{ $clean($keywords) }}">
@endif
<meta name="robots" content="{{ $robots }}">
@if($emitCanonical)
    <link rel="canonical" href="{{ $canonicalUrl }}">
@endif

<meta property="og:site_name" content="{{ $siteName }}">
<meta property="og:type" content="{{ $ogType }}">
<meta property="og:title" content="{{ $title }}">
<meta property="og:description" content="{{ $desc }}">
<meta property="og:url" content="{{ $canonicalUrl }}">
@if($ogImage)
    <meta property="og:image" content="{{ $ogImage }}">
@endif

<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="{{ $title }}">
<meta name="twitter:description" content="{{ $desc }}">
@if($ogImage)
    <meta name="twitter:image" content="{{ $ogImage }}">
@endif

@if($jsonLd)
    <script type="application/ld+json">{!! json_encode($jsonLd, JSON_UNESCAPED_UNICODE|JSON_UNESCAPED_SLASHES) !!}</script>
@endif