<?php

declare(strict_types=1);

/*

* This file is part of the ALTO library.

*

* © 2025–present Simon André

*

* For full copyright and license information, please see

* the LICENSE file distributed with this source code.

*/

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

use Alto\Code\Diff\Diff;

use Alto\Code\Diff\Exception\PatchApplyException;

use Alto\Code\Diff\Patch\PatchApplier;

use Alto\Code\Diff\Patch\UnifiedEmitter;

use Alto\Code\Diff\Patch\UnifiedParser;

echo "=== 1. Create and Apply Patch ===\n";

$originalContent = <<< 'EOF'

Line 1

Line 2

Line 3

EOF;

$modifiedContent = <<< 'EOF'

Line 1

Line 2 modified

Line 3

EOF;

// Create patch

$result = Diff::build()->compare($originalContent, $modifiedContent);

$emitter = new UnifiedEmitter();

$patch = $emitter->emit($result);

echo "Generated Patch:\n$patch\n";

// Apply patch

$applier = new PatchApplier();

$patched = $applier->apply($originalContent, $patch);

echo "Patched Content:\n$patched\n";

echo "\n=== 2. Apply Patch with Fuzz Factor ===\n";

$original = "Line 1\nLine 2\nLine 3\n";

// Patch expects "Line 2" to be removed, but we'll try to apply it to a slightly different context if needed.

// Here we use a standard patch.

$patch = <<< 'PATCH'

@@ -1,3 +1,3 @@

Line 1

-Line 2

+Line 2 modified

Line 3

PATCH;

$applier = new PatchApplier(fuzz: 2);

try {

$patched = $applier->apply($original, $patch);

echo "Patch applied successfully.\n";

} catch (PatchApplyException $e) {

echo "Failed to apply patch: {$e->getMessage()}\n";

}

echo "\n=== 3. Apply Patch Bundle (Multi-file) ===\n";

$files = [

'src/File1.php' => "<?php\nreturn 'Original A';\n",

'src/File2.php' => "<?php\nreturn 'Original B';\n",

];

$patchContent = <<< 'PATCH'

diff --git a/src/File1.php b/src/File1.php

--- a/src/File1.php

+++ b/src/File1.php

@@ -1,2 +1,2 @@

<?php

-return 'Original A';

+return 'Modified A';

diff --git a/src/File2.php b/src/File2.php

--- a/src/File2.php

+++ b/src/File2.php

@@ -1,2 +1,2 @@

<?php

-return 'Original B';

+return 'Modified B';

PATCH;

$parser = new UnifiedParser();

$bundle = $parser->parse($patchContent);

$applier = new PatchApplier();

$patchedFiles = $applier->applyBundle($files, $bundle);

foreach ($patchedFiles as $filename => $content) {

echo "File: $filename -> ".trim($content)."\n";

}