<?php

namespace App\Services;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Log;

class WikipediaService
{
    private string $baseUrl;
    private int $cacheTtl;

    public function __construct()
    {
        $this->baseUrl = config('services.wikipedia.url', 'https://en.wikipedia.org/api/rest_v1');
        $this->cacheTtl = config('services.wikipedia.cache_ttl', 30) * 24 * 60; // Convert days to minutes
    }

    /**
     * Get city summary from Wikipedia
     *
     * @param string $cityName
     * @return array|null
     */
    public function getCitySummary(string $cityName): ?array
    {
        $cacheKey = "wikipedia:summary:{$cityName}";

        return Cache::remember($cacheKey, $this->cacheTtl, function () use ($cityName) {
            try {
                $response = Http::withHeaders([
                        'User-Agent' => 'WikiTravelApp/1.0 (contact@example.com)'
                    ])
                    ->timeout(10)
                    ->get("{$this->baseUrl}/page/summary/" . urlencode($cityName));

                if ($response->successful()) {
                    $data = $response->json();

                    Log::info("Wiki message ". json_encode($data));

                    return [
                        'title' => $data['title'] ?? null,
                        'country' => $data['description'] ?? null,
                        'summary' => $data['extract'] ?? null,
                        'url' => $data['content_urls']['desktop']['page'] ?? null,
                        'page_id' => $data['pageid'] ?? null,
                        'thumbnail' => $data['thumbnail']['source'] ?? null,
                        'image' => $data['originalimage']['source'] ?? null,
                        'latitude' => $data['coordinates']['lat'] ?? null,
                        'longitude' => $data['coordinates']['lon'] ?? null,
                    ];
                }

                Log::warning("Wikipedia API request failed for city: {$cityName}", [
                    'status' => $response->status(),
                ]);

                return null;
            } catch (\Exception $e) {
                Log::error("Wikipedia API error for city: {$cityName}", [
                    'error' => $e->getMessage(),
                ]);

                return null;
            }
        });
    }

    /**
     * Search for cities on Wikipedia
     *
     * @param string $query
     * @param int $limit
     * @return array
     */
    public function searchCities(string $query, int $limit = 10): array
    {
        try {
            $response = Http::withHeaders([
                    'User-Agent' => 'WikiTravelApp/1.0 (contact@example.com)'
                ])
                ->timeout(10)
                ->get("{$this->baseUrl}/../w/api.php", [
                    'action' => 'opensearch',
                    'search' => $query,
                    'limit' => $limit,
                    'namespace' => 0,
                    'format' => 'json',
                ]);

            if ($response->successful()) {
                $data = $response->json();

                $results = [];
                $titles = $data[1] ?? [];
                $descriptions = $data[2] ?? [];
                $urls = $data[3] ?? [];

                foreach ($titles as $index => $title) {
                    $results[] = [
                        'title' => $title,
                        'description' => $descriptions[$index] ?? '',
                        'url' => $urls[$index] ?? '',
                    ];
                }

                return $results;
            }

            return [];
        } catch (\Exception $e) {
            Log::error("Wikipedia search error for query: {$query}", [
                'error' => $e->getMessage(),
            ]);

            return [];
        }
    }

    /**
     * Clear cache for a specific city
     *
     * @param string $cityName
     * @return void
     */
    public function clearCache(string $cityName): void
    {
        Cache::forget("wikipedia:summary:{$cityName}");
    }
}