import axios from 'axios';
import { geminiService } from './geminiService.js';

interface XRayResult {
    success: boolean;
    data?: {
        metadata: {
            title: string;
            description: string;
            image: string;
            tags: string[];
        };
        analysis: {
            visualDna: string[];
            sentimentGap: string;
            superiorPrompt: string;
            gapAnalysis: string;
        };
    };
    error?: string;
}

export const xrayService = {
    /**
     * Scrapes a product URL and performs deep AI analysis
     */
    async analyzeProduct(url: string, apiKey?: string): Promise<XRayResult> {
        try {
            console.log(`[X-Ray] Analyzing: ${url}`);

            // 1. WEB RESEARCH (Google Search Grounding)
            // Replaces legacy Axios scraping which gets blocked (403/422) by Etsy
            const researchResult = await geminiService.performWebResearch(url, apiKey);

            if (!researchResult.title) {
                throw new Error("AI Retrieval failed to extract product title. The URL may not be accessible or the product page structure is unsupported.");
            }

            if (!researchResult.image) {
                throw new Error("AI Retrieval could not find a product image URL. Please ensure the URL points to a valid product page.");
            }

            console.log("[X-Ray] Metadata extracted via Google:", researchResult.title);

            // 2. Perform AI Analysis (Visual + Text)
            // We pass the image URL directly if public, OR we might need to download it first base64.
            // For stability, let's download the image to base64 buffer
            // Note: Since we have the direct image URL now (likely CDN), downloadImage should work better
            // than scraping the main page.
            const imageBuffer = await this.downloadImage(researchResult.image);
            const imageBase64 = imageBuffer.toString('base64');

            const metadata = {
                title: researchResult.title,
                description: researchResult.description,
                image: researchResult.image,
                tags: [] // Search might not return tags, optional
            };

            const analysis = await geminiService.analyzeCompetitorProduct({
                title: researchResult.title,
                description: researchResult.description,
                imageBase64: imageBase64,
                apiKey
            });


            return {
                success: true,
                data: {
                    metadata,
                    analysis
                }
            };

        } catch (error: any) {
            console.error("[X-Ray] Error:", error.message);
            return {
                success: false,
                error: error.message || "Failed to analyze product"
            };
        }
    },

    async downloadImage(url: string): Promise<Buffer> {
        const response = await axios.get(url, {
            responseType: 'arraybuffer',
            headers: {
                'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36',
                'Referer': 'https://www.etsy.com/'
            }
        });
        return Buffer.from(response.data, 'binary');
    }
};