<?php

namespace App\Modules\Lemmy\Services;

use App\Enums\PlatformEnum;
use App\Models\PlatformChannelPost;
use App\Modules\Lemmy\LemmyRequest;
use App\Services\Auth\LemmyAuthService;
use Exception;

class LemmyApiService
{
    private string $instance;

    public function __construct(string $instance)
    {
        $this->instance = $instance;
    }

    public function login(string $username, string $password): ?string
    {
        try {
            $request = new LemmyRequest($this->instance);
            $response = $request->post('user/login', [
                'username_or_email' => $username,
                'password' => $password,
            ]);

            if (!$response->successful()) {
                logger()->error('Lemmy login failed', [
                    'status' => $response->status(),
                    'body' => $response->body()
                ]);
                return null;
            }

            $data = $response->json();
            return $data['jwt'] ?? null;
        } catch (Exception $e) {
            logger()->error('Lemmy login exception', ['error' => $e->getMessage()]);
            return null;
        }
    }

    public function getCommunityId(string $communityName): int
    {
        try {
            $token = LemmyAuthService::getToken();
            $request = new LemmyRequest($this->instance, $token);
            $response = $request->get('community', ['name' => $communityName]);

            if (!$response->successful()) {
                throw new Exception('Failed to fetch community: ' . $response->status());
            }

            $data = $response->json();
            return $data['community_view']['community']['id'] ?? throw new Exception('Community not found');
        } catch (Exception $e) {
            logger()->error('Community lookup failed', ['error' => $e->getMessage()]);
            throw $e;
        }
    }

    public function syncChannelPosts(string $token, int $communityId, string $communityName): void
    {
        try {
            $request = new LemmyRequest($this->instance, $token);
            $response = $request->get('post/list', [
                'community_id' => $communityId,
                'limit' => 50,
                'sort' => 'New'
            ]);

            if (!$response->successful()) {
                logger()->warning('Failed to sync channel posts', [
                    'status' => $response->status(),
                    'community_id' => $communityId
                ]);
                return;
            }

            $data = $response->json();
            $posts = $data['posts'] ?? [];

            foreach ($posts as $postData) {
                $post = $postData['post'];

                PlatformChannelPost::storePost(
                    PlatformEnum::LEMMY,
                    (string) $communityId,
                    $communityName,
                    (string) $post['id'],
                    $post['url'] ?? null,
                    $post['name'] ?? null,
                    isset($post['published']) ? new \DateTime($post['published']) : null
                );
            }

            logger()->info('Synced channel posts', [
                'community_id' => $communityId,
                'posts_count' => count($posts)
            ]);

        } catch (Exception $e) {
            logger()->error('Exception while syncing channel posts', [
                'error' => $e->getMessage(),
                'community_id' => $communityId
            ]);
        }
    }

    public function createPost(string $token, string $title, string $body, int $communityId, ?string $url = null, ?string $thumbnail = null, ?int $languageId = null): array
    {
        try {
            $request = new LemmyRequest($this->instance, $token);

            $postData = [
                'name' => $title,
                'body' => $body,
                'community_id' => $communityId,
            ];

            if ($url) {
                $postData['url'] = $url;
            }

            if ($thumbnail) {
                $postData['custom_thumbnail'] = $thumbnail;
            }

            if ($languageId) {
                $postData['language_id'] = $languageId;
            }

            $response = $request->post('post', $postData);

            if (!$response->successful()) {
                throw new Exception('Failed to create post: ' . $response->status() . ' - ' . $response->body());
            }

            return $response->json();
        } catch (Exception $e) {
            logger()->error('Post creation failed', ['error' => $e->getMessage()]);
            throw $e;
        }
    }

    public function getLanguages(): array
    {
        try {
            $request = new LemmyRequest($this->instance);
            $response = $request->get('site');

            if (!$response->successful()) {
                logger()->warning('Failed to fetch site languages', [
                    'status' => $response->status()
                ]);
                return [];
            }

            $data = $response->json();
            return $data['all_languages'] ?? [];
        } catch (Exception $e) {
            logger()->error('Exception while fetching languages', [
                'error' => $e->getMessage()
            ]);
            return [];
        }
    }
}