import fs from 'fs';
import path from 'path';
import crypto from 'crypto';
import 'dotenv/config';

// Override Qdrant URL for local script execution outside docker
process.env.QDRANT_URL = process.env.QDRANT_URL || 'http://localhost:6333';

import { upsertProductVector } from '../lib/qdrant';

// Ingests the extracted Kabelhandbuch text into Qdrant as distinct knowledge topics.
async function ingestPDF(txtPath: string) {
  if (!fs.existsSync(txtPath)) {
    console.error(`File not found: ${txtPath}`);
    process.exit(1);
  }

  try {
    const text = fs.readFileSync(txtPath, 'utf8');

    // Simple sentence/paragraph chunking
    // We split by standard paragraph breaks (double newline) or large content blocks.
    const chunks = text
      .split(/\n\s*\n/)
      .map((c) => c.trim())
      .filter((c) => c.length > 50);

    console.log(`Extracted ${text.length} characters from PDF.`);
    console.log(`Generated ${chunks.length} chunks for vector ingestion.\n`);

    for (let i = 0; i < chunks.length; i++) {
      // We limit chuck sizes to ensure Openrouter embedding models don't timeout/fail,
      // stringing multiple paragraphs if they are short, or cutting them if too long.
      // For baseline, we'll index every chunk individually mapped as 'knowledge' with a unique ID

      const chunkText = chunks[i];

      // Generate a synthetic ID that won't collide with Payload Product IDs
      // Qdrant strictly requires UUID or unsigned int.
      const syntheticId = crypto.randomUUID();

      const payloadData = {
        type: 'knowledge', // Custom flag to differentiate from 'product'
        title: `Kabelhandbuch Wissen - Bereich ${i + 1}`,
        content: chunkText,
        source: 'Kabelhandbuch KLZ.pdf',
      };

      // Use the existing upsert function since it just embeds the text and stores the payload
      await upsertProductVector(syntheticId, chunkText, payloadData);
      console.log(`✅ Upserted chunk ${i + 1}/${chunks.length}`);
    }

    console.log('🎉 PDF Ingestion Complete!');
    process.exit(0);
  } catch (err) {
    console.error('Failed to parse PDF:', err);
    process.exit(1);
  }
}

// Run mapping
const targetTxt = '/Users/marcmintel/Downloads/kabelhandbuch.txt';
ingestPDF(targetTxt);