<?php

namespace App\Modules\Movies\Services\Omdb;

use App\Modules\Movies\Services\Contracts\MovieProvider;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Collection;

class OmdbMovieProvider implements MovieProvider
{
    protected string $baseUrl;
    protected ?string $apiKey;
    protected int $cacheTtl;

    public function __construct()
    {
        $this->baseUrl = rtrim(config('movies.omdb.base_url', 'https://www.omdbapi.com/'), '/');
        $this->apiKey = config('movies.omdb.api_key');
        $this->cacheTtl = (int) config('movies.omdb.cache_ttl', 3600);
    }

    public function search(string $query, int $page = 1): array
    {
        $query = trim($query);
        if ($query === '') {
            return ['results' => collect(), 'total' => 0, 'page' => 1, 'has_more' => false];
        }

        $cacheKey = sprintf('omdb.search.%s.p%s', md5($query), $page);
        $data = Cache::remember($cacheKey, $this->cacheTtl, function () use ($query, $page) {
            $response = Http::acceptJson()
                ->timeout(6)
                ->retry(3, 300)
                ->get($this->baseUrl, [
                    'apikey' => $this->apiKey,
                    's' => $query,
                    'type' => 'movie',
                    'page' => $page,
                ]);

            if ($response->failed()) {
                abort(502, 'Couldn’t reach OMDb. Please try again.');
            }

            return $response->json();
        });

        $results = collect();
        $total = 0;
        $hasMore = false;
        if (isset($data['Response']) && $data['Response'] === 'True' && isset($data['Search'])) {
            $total = (int) ($data['totalResults'] ?? 0);
            $hasMore = $page * 10 < $total; // OMDb pages of 10
            $results = collect($data['Search'])->map(function ($item) {
                return [
                    'provider' => 'omdb',
                    'provider_id' => $item['imdbID'] ?? null,
                    'title' => $item['Title'] ?? null,
                    'year' => $item['Year'] ?? null,
                    'poster_url' => ($item['Poster'] ?? 'N/A') !== 'N/A' ? $item['Poster'] : null,
                ];
            });
        }

        return [
            'results' => $results,
            'total' => $total,
            'page' => $page,
            'has_more' => $hasMore,
        ];
    }

    public function details(string $id): array
    {
        $id = trim($id);
        $cacheKey = sprintf('omdb.details.%s', $id);
        $data = Cache::remember($cacheKey, $this->cacheTtl, function () use ($id) {
            $response = Http::acceptJson()
                ->timeout(6)
                ->retry(3, 300)
                ->get($this->baseUrl, [
                    'apikey' => $this->apiKey,
                    'i' => $id,
                    'plot' => 'full',
                    'type' => 'movie',
                ]);

            if ($response->failed()) {
                abort(502, 'Couldn’t reach OMDb. Please try again.');
            }

            return $response->json();
        });

        if (!isset($data['Response']) || $data['Response'] !== 'True') {
            // Map explicit OMDb errors that indicate provider-side issues differently if needed
            // Default to not found for details when OMDb says False
            abort(404, 'Movie not found in OMDb');
        }

        // Normalize to internal structure
        $genres = $this->splitList($data['Genre'] ?? '');
        $actors = $this->splitList($data['Actors'] ?? '');
        $directors = $this->splitList($data['Director'] ?? '');
        $studios = $this->splitList($data['Production'] ?? '');
        $countries = $this->splitList($data['Country'] ?? '');
        $languages = $this->splitList($data['Language'] ?? '');

        return [
            'provider' => 'omdb',
            'provider_id' => $data['imdbID'] ?? null,
            'external_ids' => [
                'imdb' => $data['imdbID'] ?? null,
                'omdb' => $data['imdbID'] ?? null,
            ],
            'title' => $data['Title'] ?? null,
            'original_title' => $data['Title'] ?? null,
            'description' => $data['Plot'] ?? null,
            'poster_url' => ($data['Poster'] ?? 'N/A') !== 'N/A' ? $data['Poster'] : null,
            'backdrop_url' => null,
            'genres' => $genres,
            'rating' => $data['Rated'] ?? null,
            'release_date' => $this->parseDate($data['Released'] ?? null),
            'year' => isset($data['Year']) ? (int) substr($data['Year'], 0, 4) : null,
            'runtime' => $this->parseRuntime($data['Runtime'] ?? null),
            'actors' => $actors,
            'directors' => $directors,
            'studios' => $studios,
            'countries' => $countries,
            'languages' => $languages,
        ];
    }

    protected function splitList(?string $value): array
    {
        if (!$value || $value === 'N/A') return [];
        return collect(explode(',', $value))
            ->map(fn($v) => trim($v))
            ->filter()
            ->values()
            ->all();
    }

    protected function parseRuntime(?string $runtime): ?int
    {
        if (!$runtime) return null;
        if (preg_match('/(\d+) min/i', $runtime, $m)) {
            return (int) $m[1];
        }
        return null;
    }

    protected function parseDate(?string $date): ?string
    {
        if (!$date || $date === 'N/A') return null;
        // OMDb uses formats like "01 Jan 2000"
        $ts = strtotime($date);
        return $ts ? date('Y-m-d', $ts) : null;
    }
}