const fs = require('fs');
const path = require('path');
const { PNG } = require('pngjs');
const jsQR = require('jsqr');

// Find the QR code file
const baseDir = path.resolve(__dirname, '..');
const files = fs.readdirSync(baseDir).filter(f => f.includes('瑜伽') && f.endsWith('.png'));
console.log('Found files:', files);

if (files.length === 0) {
  console.log('No QR code file found');
  process.exit(0);
}

const filePath = path.join(baseDir, files[0]);
console.log('Reading:', filePath);

const buf = fs.readFileSync(filePath);
console.log('File size:', buf.length, 'bytes');

const png = PNG.sync.read(buf);
console.log('Image:', png.width, 'x', png.height);

const code = jsQR(new Uint8ClampedArray(png.data), png.width, png.height);
if (code) {
  console.log('QR Code Data:', code.data);
} else {
  console.log('No QR code found at original resolution');
  // Try with different inversion
  const inverted = Buffer.alloc(png.data.length);
  for (let i = 0; i < png.data.length; i += 4) {
    inverted[i] = 255 - png.data[i];
    inverted[i+1] = 255 - png.data[i+1];
    inverted[i+2] = 255 - png.data[i+2];  
    inverted[i+3] = png.data[i+3];
  }
  const code2 = jsQR(new Uint8ClampedArray(inverted), png.width, png.height);
  if (code2) {
    console.log('Inverted QR Code Data:', code2.data);
  } else {
    console.log('Still no QR code found');
  }
}