<?php

namespace App\Services;

use Illuminate\Http\Client\ConnectionException;
use Illuminate\Http\Client\Response;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Str;
use RuntimeException;

class FreepikStockContentService
{
    public function search(string $query, string $type = 'all', string $order = 'relevance', int $page = 1): array
    {
        $apiKey = trim((string) config('services.freepik.api_key', ''));
        $cleanQuery = trim($query);
        $type = $this->normalizeType($type);
        $order = in_array($order, ['relevance', 'recent'], true) ? $order : 'relevance';
        $page = max(1, $page);

        if ($apiKey === '') {
            throw new RuntimeException($this->missingApiKeyMessage());
        }

        if ($cleanQuery === '') {
            return [
                'results' => [
                    'images' => [],
                    'videos' => [],
                    'icons' => [],
                    'audio' => [],
                ],
                'errors' => [],
                'summary' => [
                    'images' => 0,
                    'videos' => 0,
                    'icons' => 0,
                    'audio' => 0,
                ],
            ];
        }

        $targets = $type === 'all'
            ? ['images', 'videos', 'icons', 'audio']
            : [$type];

        $results = [
            'images' => [],
            'videos' => [],
            'icons' => [],
            'audio' => [],
        ];
        $errors = [];

        foreach ($targets as $target) {
            try {
                $results[$target] = match ($target) {
                    'images' => $this->searchResources($apiKey, $cleanQuery, $order, $page),
                    'videos' => $this->searchVideos($apiKey, $cleanQuery, $order, $page),
                    'icons' => $this->searchIcons($apiKey, $cleanQuery, $order, $page),
                    'audio' => $this->searchMusic($apiKey, $cleanQuery, $page),
                    default => [],
                };
            } catch (\Throwable $error) {
                $errors[$target] = $error->getMessage();
            }
        }

        return [
            'results' => $results,
            'errors' => $errors,
            'summary' => [
                'images' => count($results['images']),
                'videos' => count($results['videos']),
                'icons' => count($results['icons']),
                'audio' => count($results['audio']),
            ],
        ];
    }

    private function searchResources(string $apiKey, string $query, string $order, int $page): array
    {
        $response = $this->client($apiKey)
            ->get($this->endpoint('/v1/resources'), [
                'term' => $query,
                'page' => $page,
                'limit' => 8,
                'order' => $order,
            ]);

        $items = $this->extractList($response, 'Freepik stock image search gagal');

        return collect($items)->map(function (array $item) {
            return [
                'id' => (int) ($item['id'] ?? 0),
                'kind' => 'image',
                'title' => (string) ($item['title'] ?? 'Untitled asset'),
                'url' => (string) ($item['url'] ?? ''),
                'thumb' => (string) data_get($item, 'image.source.url', ''),
                'subtitle' => trim(implode(' • ', array_filter([
                    strtoupper((string) data_get($item, 'image.type', 'asset')),
                    ucfirst((string) data_get($item, 'image.orientation', '')),
                    (string) data_get($item, 'author.name', ''),
                ]))),
                'badge' => strtoupper((string) data_get($item, 'image.type', 'image')),
                'meta_line' => trim(implode(' • ', array_filter([
                    (string) data_get($item, 'meta.published_at', ''),
                    'Likes '.(string) data_get($item, 'stats.likes', 0),
                ]))),
            ];
        })->filter(fn (array $item) => $item['thumb'] !== '')->values()->all();
    }

    private function searchVideos(string $apiKey, string $query, string $order, int $page): array
    {
        $response = $this->client($apiKey)
            ->get($this->endpoint('/v1/videos'), [
                'term' => $query,
                'page' => $page,
                'order' => $order,
            ]);

        $items = array_slice($this->extractList($response, 'Freepik video search gagal'), 0, 8);

        return collect($items)->map(function (array $item) {
            return [
                'id' => (int) ($item['id'] ?? 0),
                'kind' => 'video',
                'title' => (string) ($item['name'] ?? 'Untitled video'),
                'url' => (string) ($item['url'] ?? ''),
                'thumb' => (string) data_get($item, 'thumbnails.1.url', data_get($item, 'thumbnails.0.url', '')),
                'preview_url' => (string) data_get($item, 'previews.0.url', ''),
                'subtitle' => trim(implode(' • ', array_filter([
                    strtoupper((string) ($item['quality'] ?? 'video')),
                    (string) ($item['duration'] ?? ''),
                    (string) data_get($item, 'author.name', ''),
                ]))),
                'badge' => 'VIDEO',
                'meta_line' => trim(implode(' • ', array_filter([
                    (string) ($item['aspect_ratio'] ?? ''),
                    (string) ($item['item_subtype'] ?? ''),
                ]))),
            ];
        })->filter(fn (array $item) => $item['thumb'] !== '')->values()->all();
    }

    private function searchIcons(string $apiKey, string $query, string $order, int $page): array
    {
        $response = $this->client($apiKey)
            ->get($this->endpoint('/v1/icons'), [
                'term' => $query,
                'page' => $page,
                'per_page' => 8,
                'order' => $order,
                'thumbnail_size' => 256,
            ]);

        $items = $this->extractList($response, 'Freepik icon search gagal');

        return collect($items)->map(function (array $item) {
            $slug = trim((string) ($item['slug'] ?? ''));
            $id = (int) ($item['id'] ?? 0);

            return [
                'id' => $id,
                'kind' => 'icon',
                'title' => (string) ($item['name'] ?? 'Untitled icon'),
                'url' => $slug !== '' && $id > 0 ? 'https://www.freepik.com/icon/'.$slug.'_'.$id : '',
                'thumb' => (string) data_get($item, 'thumbnails.0.url', ''),
                'subtitle' => trim(implode(' • ', array_filter([
                    (string) data_get($item, 'style.name', ''),
                    (string) data_get($item, 'author.name', ''),
                ]))),
                'badge' => 'ICON',
                'meta_line' => collect(data_get($item, 'tags', []))
                    ->take(3)
                    ->pluck('name')
                    ->filter()
                    ->implode(' • '),
            ];
        })->filter(fn (array $item) => $item['thumb'] !== '')->values()->all();
    }

    private function searchMusic(string $apiKey, string $query, int $page): array
    {
        $response = $this->client($apiKey)
            ->get($this->endpoint('/v1/music'), [
                'q' => $query,
                'limit' => 6,
                'offset' => ($page - 1) * 6,
            ]);

        $json = $response->json();
        if (! $response->successful()) {
            throw new RuntimeException('Freepik music search gagal: '.$response->status().' - '.$this->responseError($response));
        }

        $items = data_get($json, 'results', []);
        if (! is_array($items)) {
            return [];
        }

        return collect($items)->map(function (array $item) {
            $genres = collect(data_get($item, 'genres', []))->pluck('name')->filter()->take(2)->implode(' • ');

            return [
                'id' => (int) ($item['id'] ?? 0),
                'kind' => 'audio',
                'title' => (string) ($item['title'] ?? 'Untitled track'),
                'url' => (string) ($item['preview_url'] ?? ''),
                'thumb' => (string) ($item['cover_url'] ?? ''),
                'subtitle' => trim(implode(' • ', array_filter([
                    (string) ($item['time'] ?? ''),
                    (string) data_get($item, 'artist.name', ''),
                ]))),
                'badge' => 'AUDIO',
                'meta_line' => trim(implode(' • ', array_filter([
                    $genres,
                    (bool) ($item['is_premium'] ?? false) ? 'Premium' : 'Free',
                ]))),
            ];
        })->filter(fn (array $item) => $item['thumb'] !== '')->values()->all();
    }

    private function client(string $apiKey)
    {
        return Http::connectTimeout(15)
            ->timeout(45)
            ->retry(3, 500, fn ($exception) => $exception instanceof ConnectionException, throw: false)
            ->acceptJson()
            ->withOptions([
                'force_ip_resolve' => 'v4',
            ])
            ->withHeaders([
                'x-freepik-api-key' => $apiKey,
                'User-Agent' => 'TeknoMedia/1.0 (+Laravel Freepik Search Client)',
            ]);
    }

    private function endpoint(string $path): string
    {
        return rtrim($this->apiOrigin(), '/').$path;
    }

    private function apiOrigin(): string
    {
        $configured = trim((string) config('services.freepik.base_url', 'https://api.freepik.com/v1/ai/text-to-image'));
        $scheme = parse_url($configured, PHP_URL_SCHEME) ?: 'https';
        $host = parse_url($configured, PHP_URL_HOST);
        $port = parse_url($configured, PHP_URL_PORT);

        if (! is_string($host) || $host === '') {
            return 'https://api.freepik.com';
        }

        return $scheme.'://'.$host.($port ? ':'.$port : '');
    }

    private function extractList(Response $response, string $prefix): array
    {
        if (! $response->successful()) {
            throw new RuntimeException($prefix.': '.$response->status().' - '.$this->responseError($response));
        }

        $items = data_get($response->json(), 'data', []);

        return is_array($items) ? $items : [];
    }

    private function responseError(Response $response): string
    {
        if ($response->status() === 429) {
            return 'Kuota Freepik API habis (HTTP 429). Isi billing/upgrade paket di dashboard Freepik Developers.';
        }

        $message = data_get($response->json(), 'message')
            ?? data_get($response->json(), 'error.message')
            ?? data_get($response->json(), 'detail')
            ?? $response->body();

        return Str::limit(trim((string) $message), 240);
    }

    private function normalizeType(string $type): string
    {
        return match ($type) {
            'image', 'images' => 'images',
            'video', 'videos' => 'videos',
            'audio', 'music' => 'audio',
            'icon', 'icons', 'other', 'others' => 'icons',
            default => 'all',
        };
    }

    private function missingApiKeyMessage(): string
    {
        $value = strtolower(trim((string) (
            config('services.huggingface.hf_only')
            ?? $_ENV['TOOLS_HF_ONLY']
            ?? $_SERVER['TOOLS_HF_ONLY']
            ?? getenv('TOOLS_HF_ONLY')
            ?? 'false'
        )));

        if (in_array($value, ['1', 'true', 'yes', 'on'], true)) {
            return 'Browser stock Freepik dimatikan di mode Hugging Face-only.';
        }

        return 'FREEPIK_API_KEY belum diisi di file .env';
    }
}