<?php

declare(strict_types=1);

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

use App\Framework\QrCode\ErrorCorrection\ReedSolomonEncoder;

echo "=== Testing Reversed Codewords ===\n\n";

// Hypothesis: Maybe we need to reverse the codewords for RS encoding?
// In QR codes, codewords are placed in a specific order, but maybe
// for RS encoding we need them in reverse order?

$data = [64, 180, 132, 84, 196, 196, 242, 5, 116, 245, 36, 196, 64, 236, 17, 236];
$ecCodewords = 10;

echo "Original data: " . implode(', ', $data) . "\n\n";

// Try encoding with reversed data
$reversedData = array_reverse($data);
echo "Reversed data: " . implode(', ', $reversedData) . "\n\n";

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

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

// Reverse EC codewords too
$reversedEC = array_reverse($ec);
echo "Reversed EC codewords: " . implode(', ', $reversedEC) . "\n\n";

// Test with original order
$originalEC = $rs->encode($data, $ecCodewords);
echo "Original EC codewords: " . implode(', ', $originalEC) . "\n\n";

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

// Test 1: Original order
$full1 = array_merge($data, $originalEC);
$syndromes1 = $decoder->calculateSyndromes($full1, $ecCodewords);
echo "Original order syndromes: " . implode(', ', $syndromes1) . "\n";
$allZero1 = true;
foreach ($syndromes1 as $s) {
    if ($s !== 0) {
        $allZero1 = false;
        break;
    }
}
echo ($allZero1 ? "✅" : "❌") . "\n\n";

// Test 2: Reversed order
$full2 = array_merge($reversedData, $reversedEC);
$syndromes2 = $decoder->calculateSyndromes($full2, $ecCodewords);
echo "Reversed order syndromes: " . implode(', ', $syndromes2) . "\n";
$allZero2 = true;
foreach ($syndromes2 as $s) {
    if ($s !== 0) {
        $allZero2 = false;
        break;
    }
}
echo ($allZero2 ? "✅" : "❌") . "\n\n";

// Test 3: Data reversed, EC original
$full3 = array_merge($reversedData, $originalEC);
$syndromes3 = $decoder->calculateSyndromes($full3, $ecCodewords);
echo "Reversed data + original EC syndromes: " . implode(', ', $syndromes3) . "\n";
$allZero3 = true;
foreach ($syndromes3 as $s) {
    if ($s !== 0) {
        $allZero3 = false;
        break;
    }
}
echo ($allZero3 ? "✅" : "❌") . "\n\n";