<?php

namespace App\Http\Controllers;

use App\Models\Page;
use App\Models\Blog;
use App\Models\Product;
use Illuminate\Http\Response;

class SitemapController extends Controller
{
    public function index(): Response
    {
        $urls = [];
        $activeLanguages = [];
        if (class_exists(\App\Models\Language::class)) {
            $activeLanguages = \App\Models\Language::where('is_active', true)->get();
        }

        $getAlternates = function (string $baseUrl) use ($activeLanguages) {
            $alternates = [];
            foreach ($activeLanguages as $lang) {
                $connector = str_contains($baseUrl, '?') ? '&' : '?';
                $alternates[] = [
                    'hreflang' => $lang->code,
                    'href' => $baseUrl . $connector . 'locale=' . $lang->code,
                ];
            }
            $alternates[] = [
                'hreflang' => 'x-default',
                'href' => $baseUrl,
            ];
            return $alternates;
        };

        // 1. Static & Main Pages
        $homeUrl = url('/');
        $urls[] = [
            'loc' => $homeUrl,
            'alternates' => $getAlternates($homeUrl),
            'lastmod' => now()->startOfDay()->toAtomString(),
            'changefreq' => 'daily',
            'priority' => '1.0',
        ];

        $blogIndexUrl = route('blog.index');
        $urls[] = [
            'loc' => $blogIndexUrl,
            'alternates' => $getAlternates($blogIndexUrl),
            'lastmod' => now()->startOfDay()->toAtomString(),
            'changefreq' => 'weekly',
            'priority' => '0.8',
        ];

        $careerIndexUrl = route('career.index');
        $urls[] = [
            'loc' => $careerIndexUrl,
            'alternates' => $getAlternates($careerIndexUrl),
            'lastmod' => now()->startOfMonth()->toAtomString(),
            'changefreq' => 'monthly',
            'priority' => '0.5',
        ];

        // 2. Dynamic Pages
        $pages = Page::where('status', 'published')
            ->where('is_homepage', false)
            ->get();
        foreach ($pages as $page) {
            $pageUrl = url($page->slug);
            $urls[] = [
                'loc' => $pageUrl,
                'alternates' => $getAlternates($pageUrl),
                'lastmod' => $page->updated_at->toAtomString(),
                'changefreq' => 'weekly',
                'priority' => '0.7',
            ];
        }

        // 3. Blog Posts
        if (class_exists(Blog::class)) {
            $posts = Blog::published()->get();
            foreach ($posts as $post) {
                $postUrl = route('blog.show', $post->slug);
                $urls[] = [
                    'loc' => $postUrl,
                    'alternates' => $getAlternates($postUrl),
                    'lastmod' => $post->updated_at->toAtomString(),
                    'changefreq' => 'weekly',
                    'priority' => '0.6',
                ];
            }
        }

        // 4. Products
        if (class_exists(Product::class)) {
            $products = Product::where('is_active', true)->get();
            foreach ($products as $product) {
                $productUrl = route('products.show', $product->slug);
                $urls[] = [
                    'loc' => $productUrl,
                    'alternates' => $getAlternates($productUrl),
                    'lastmod' => $product->updated_at->toAtomString(),
                    'changefreq' => 'weekly',
                    'priority' => '0.7',
                ];
            }
        }

        return response()->view('sitemap', compact('urls'))
            ->header('Content-Type', 'text/xml');
    }
}