<?php

namespace App\Services\Publishing;

use App\Enums\PlatformEnum;
use App\Exceptions\PublishException;
use App\Models\Article;
use App\Models\ArticlePublication;
use App\Models\PlatformChannel;
use App\Models\Route;
use App\Modules\Lemmy\Services\LemmyPublisher;
use App\Services\Log\LogSaver;
use Exception;
use Illuminate\Database\Eloquent\Collection as EloquentCollection;
use Illuminate\Support\Collection;
use RuntimeException;

class ArticlePublishingService
{
    public function __construct(private LogSaver $logSaver)
    {
    }
    /**
     * Factory seam to create publisher instances (helps testing without network calls)
     */
    protected function makePublisher(mixed $account): LemmyPublisher
    {
        return new LemmyPublisher($account);
    }
    /**
     * @param array<string, mixed> $extractedData
     * @return Collection<int, ArticlePublication>
     * @throws PublishException
     */
    public function publishToRoutedChannels(Article $article, array $extractedData): Collection
    {
        if (! $article->isValid()) {
            throw new PublishException($article, PlatformEnum::LEMMY, new RuntimeException('CANNOT_PUBLISH_INVALID_ARTICLE'));
        }

        $feed = $article->feed;

        // Get active routes with keywords instead of just channels
        $activeRoutes = Route::where('feed_id', $feed->id)
            ->where('is_active', true)
            ->with(['platformChannel.platformInstance', 'platformChannel.activePlatformAccounts', 'keywords'])
            ->orderBy('priority', 'desc')
            ->get();

        // Filter routes based on keyword matches
        $matchingRoutes = $activeRoutes->filter(function (Route $route) use ($extractedData) {
            return $this->routeMatchesArticle($route, $extractedData);
        });

        return $matchingRoutes->map(function (Route $route) use ($article, $extractedData) {
            $channel = $route->platformChannel;
            $account = $channel->activePlatformAccounts()->first();

            if (! $account) {
                $this->logSaver->warning('No active account for channel', $channel, [
                    'article_id' => $article->id,
                    'route_priority' => $route->priority
                ]);

                return null;
            }

            return $this->publishToChannel($article, $extractedData, $channel, $account);
        })
        ->filter();
    }

    /**
     * Check if a route matches an article based on keywords
     * @param array<string, mixed> $extractedData
     */
    private function routeMatchesArticle(Route $route, array $extractedData): bool
    {
        // Get active keywords for this route
        $activeKeywords = $route->keywords->where('is_active', true);
        
        // If no keywords are defined for this route, the route matches any article
        if ($activeKeywords->isEmpty()) {
            return true;
        }

        // Get article content for keyword matching
        $articleContent = '';
        if (isset($extractedData['full_article'])) {
            $articleContent = $extractedData['full_article'];
        }
        if (isset($extractedData['title'])) {
            $articleContent .= ' ' . $extractedData['title'];
        }
        if (isset($extractedData['description'])) {
            $articleContent .= ' ' . $extractedData['description'];
        }

        // Check if any of the route's keywords match the article content
        foreach ($activeKeywords as $keywordModel) {
            $keyword = $keywordModel->keyword;
            if (stripos($articleContent, $keyword) !== false) {
                return true;
            }
        }

        return false;
    }

    /**
     * @param array<string, mixed> $extractedData
     */
    private function publishToChannel(Article $article, array $extractedData, PlatformChannel $channel, mixed $account): ?ArticlePublication
    {
        try {
            $publisher = $this->makePublisher($account);
            $postData = $publisher->publishToChannel($article, $extractedData, $channel);

            $publication = ArticlePublication::create([
                'article_id' => $article->id,
                'post_id' => $postData['post_view']['post']['id'],
                'platform_channel_id' => $channel->id,
                'published_by' => $account->username,
                'published_at' => now(),
                'platform' => $channel->platformInstance->platform->value,
                'publication_data' => $postData,
            ]);

            $this->logSaver->info('Published to channel via keyword-filtered routing', $channel, [
                'article_id' => $article->id
            ]);

            return $publication;
        } catch (Exception $e) {
            $this->logSaver->warning('Failed to publish to channel', $channel, [
                'article_id' => $article->id,
                'error' => $e->getMessage()
            ]);

            return null;
        }
    }
}