<?php

declare(strict_types=1);

require_once __DIR__ . '/../../vendor/autoload.php';

use App\Framework\QrCode\ErrorCorrection\ReedSolomonEncoder;

echo "=== RS with Reference Data Codewords ===\n\n";

// Reference data codewords from QR code specification
$referenceData = [64, 180, 132, 84, 196, 196, 242, 5, 116, 245, 174, 59, 64, 109, 236, 233];
$ecCodewords = 10;

echo "Reference data codewords:\n";
echo implode(', ', $referenceData) . "\n\n";

$rs = new ReedSolomonEncoder();
$ec = $rs->encode($referenceData, $ecCodewords);

echo "Generated EC codewords:\n";
echo implode(', ', $ec) . "\n\n";

// Known reference EC codewords from QR code specification
// These should be the correct EC codewords for the reference data
$referenceEC = [0, 245, 228, 127, 21, 207, 194, 102, 66, 52];

echo "Expected EC codewords (from spec):\n";
echo implode(', ', $referenceEC) . "\n\n";

// Compare
$matches = 0;
for ($i = 0; $i < min(count($ec), count($referenceEC)); $i++) {
    if ($ec[$i] === $referenceEC[$i]) {
        $matches++;
    } else {
        echo "❌ EC codeword {$i}: got {$ec[$i]}, expected {$referenceEC[$i]}\n";
    }
}

if ($matches === count($referenceEC)) {
    echo "✅ All EC codewords match reference!\n";
} else {
    echo "❌ {$matches}/" . count($referenceEC) . " EC codewords match\n";
}

// Verify with decoder
require_once __DIR__ . '/test-reed-solomon-decoder.php';
$decoder = new SimpleRSDecoder();

$fullCodeword = array_merge($referenceData, $ec);
$syndromes = $decoder->calculateSyndromes($fullCodeword, 10);

echo "\nSyndromes (should all be 0):\n";
echo implode(', ', $syndromes) . "\n";

$allZero = true;
foreach ($syndromes as $s) {
    if ($s !== 0) {
        $allZero = false;
        break;
    }
}

if ($allZero) {
    echo "\n✅ All syndromes are zero - Reed-Solomon is CORRECT!\n";
} else {
    echo "\n❌ Syndromes are not all zero - Reed-Solomon is WRONG!\n";
    echo "\nThis confirms the Reed-Solomon implementation has a bug.\n";
}

// Also test with reference EC codewords
echo "\n=== Testing with Reference EC Codewords ===\n";
$fullWithReferenceEC = array_merge($referenceData, $referenceEC);
$syndromesRef = $decoder->calculateSyndromes($fullWithReferenceEC, 10);

echo "Syndromes with reference EC codewords:\n";
echo implode(', ', $syndromesRef) . "\n";

$allZeroRef = true;
foreach ($syndromesRef as $s) {
    if ($s !== 0) {
        $allZeroRef = false;
        break;
    }
}

if ($allZeroRef) {
    echo "\n✅ Reference EC codewords are valid!\n";
    echo "This means the reference EC codewords are correct.\n";
    echo "Our implementation produces different (incorrect) EC codewords.\n";
} else {
    echo "\n❌ Even reference EC codewords are invalid!\n";
    echo "This means either:\n";
    echo "  1. The reference EC codewords are wrong\n";
    echo "  2. Our syndrome calculation is wrong\n";
}