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<?php

namespace App\Services;

use App\Models\Vcard;
use App\Models\User;
use Illuminate\Support\Facades\Log;

class AiCardGeneratorService
{
    public function __construct(
        protected SocialScraperService $scraper,
        protected LlmAnalyzerService   $llm
    ) {}

    /**
     * Full AI generation pipeline with MULTI-SOURCE support.
     * $sources can be a single URL string or an array of URLs.
     */
    public function generate(User $user, string|array $sources, Vcard $vcard): array
    {
        // Normalize to array
        if (is_string($sources)) {
            $sources = [$sources];
        }
        $sources = array_filter($sources, fn($s) => !empty(trim($s)));

        try {
            // Step 1: Fetch from ALL sources in parallel (sequential for shared hosting)
            Log::info("[AiCardGen] Fetching " . count($sources) . " sources for user#{$user->id}");
            $multiSourceData = $this->scraper->fetchMultiple($sources);

            $socialCount    = count($multiSourceData['social']    ?? []);
            $corporateCount = count($multiSourceData['corporate'] ?? []);
            Log::info("[AiCardGen] Fetched: {$socialCount} social, {$corporateCount} corporate sources");

            // Step 2: LLM multi-source analysis
            $region   = config('app.region', 'BR');
            $aiResult = $this->llm->analyzeMultiple($multiSourceData, $region);
            Log::info("[AiCardGen] LLM result: template_id={$aiResult['template_id']}, confidence={$aiResult['confidence']}");

            // Step 3: Apply to VCard
            $updateData = [
                'ai_status'   => 'completed',
                'ai_data'     => json_encode($aiResult, JSON_UNESCAPED_UNICODE),
                'template_id' => $aiResult['template_id'],
            ];

            // Only fill fields if VCard doesn't already have them
            if (empty($vcard->name) && !empty($aiResult['name'])) {
                $updateData['name'] = $aiResult['name'];
            }
            if (empty($vcard->description) && !empty($aiResult['bio'])) {
                $updateData['description'] = $aiResult['bio'];
            }
            if (empty($vcard->occupation) && !empty($aiResult['profession'])) {
                $updateData['occupation'] = $aiResult['profession'];
            }
            if (empty($vcard->company) && !empty($aiResult['company'])) {
                $updateData['company'] = $aiResult['company'];
            }

            $vcard->update($updateData);

            return [
                'success'        => true,
                'vcard_id'       => $vcard->id,
                'template_id'    => $aiResult['template_id'],
                'completion_pct' => 90,
                'sources_used'   => count($sources),
                'confidence'     => $aiResult['confidence'] ?? 'medium',
                'ai_result'      => $aiResult,
            ];

        } catch (\Exception $e) {
            Log::error("[AiCardGen] Failed for user#{$user->id}: " . $e->getMessage());
            $vcard->update(['ai_status' => 'failed']);
            return ['success' => false, 'vcard_id' => $vcard->id, 'error' => $e->getMessage()];
        }
    }
}