#!/usr/bin/env node
/**
 * Generate 80 QR code SVGs for table ordering (40 Backaplan + 40 Askim).
 *
 * Usage:
 *   node scripts/generate-table-qr-codes.mjs
 *
 * Output:
 *   public/images/booking/backaplan/qr-backaplan-001.svg ... qr-backaplan-040.svg
 *   public/images/booking/askim/qr-askim-001.svg       ... qr-askim-040.svg
 *
 * Each QR points to:
 *   https://shahikitchen.se/orderfromtable?table=backaplan-001
 *   https://shahikitchen.se/orderfromtable?table=askim-001
 *   etc.
 */

import QRCode from 'qrcode';
import fs from 'fs/promises';
import path from 'path';
import { fileURLToPath } from 'url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const ROOT = path.resolve(__dirname, '..');

const BASE_URL = 'https://shahikitchen.se/orderfromtable';

const BRANCHES = [
  { key: 'backaplan', label: 'Backaplan', dir: 'backaplan' },
  { key: 'askim', label: 'Askim', dir: 'askim' },
];

const MIN_TABLE = 1;
const MAX_TABLE = 40;

function pad3(n) {
  return String(n).padStart(3, '0');
}

async function ensureDir(dir) {
  await fs.mkdir(dir, { recursive: true });
}

async function generateOne(branchKey, tableNum, outputPath) {
  const tableId = `${branchKey}-${pad3(tableNum)}`;
  const url = `${BASE_URL}?table=${tableId}`;

  const svg = await QRCode.toString(url, {
    type: 'svg',
    width: 320,
    margin: 2,
    errorCorrectionLevel: 'Q', // Good balance for physical use (tables, stands, possibly dirty)
    color: {
      dark: '#111111',   // near-black for high contrast print
      light: '#FFFFFF',
    },
  });

  // Add a small metadata comment (harmless in SVG)
  const svgWithMeta = svg.replace(
    '<svg ',
    `<!-- Shahi Kitchen Table QR: ${tableId} -->\n<svg `
  );

  await fs.writeFile(outputPath, svgWithMeta, 'utf8');
  console.log(`✓ ${tableId} → ${path.relative(ROOT, outputPath)}`);
}

async function main() {
  console.log('Generating Shahi Kitchen table QR codes (80 total)...\n');

  for (const branch of BRANCHES) {
    const outDir = path.join(ROOT, 'public', 'images', 'booking', branch.dir);
    await ensureDir(outDir);

    for (let i = MIN_TABLE; i <= MAX_TABLE; i++) {
      const filename = `qr-${branch.key}-${pad3(i)}.svg`;
      const fullPath = path.join(outDir, filename);
      await generateOne(branch.key, i, fullPath);
    }
    console.log(''); // blank line between branches
  }

  console.log('All 80 QR codes generated successfully.');
  console.log('They all target the single /orderfromtable page with ?table=... param.');
}

main().catch((err) => {
  console.error('QR generation failed:', err);
  process.exit(1);
});