<?php
declare(strict_types=1);

/**
 * The snapshot store (#231) on a scratch directory. Plain PHP like accounts.test.php; CI runs it
 * with `php tests/php/snapshots.test.php` and reads the last line.
 */

require __DIR__ . '/../../api/lib/AtomicFile.php';
require __DIR__ . '/../../api/lib/Store.php';
require __DIR__ . '/../../api/lib/SnapshotStore.php';

$failed = 0;
$passed = 0;

function check(string $name, bool $ok, mixed $got = null): void
{
    global $failed, $passed;
    if ($ok) {
        $passed++;
        echo "PASS  {$name}\n";
        return;
    }
    $failed++;
    echo "FAIL  {$name}", $got === null ? '' : ' — got ' . json_encode($got), "\n";
}

$dir = sys_get_temp_dir() . '/game-maker-php-snapshots-' . bin2hex(random_bytes(4));
mkdir($dir);
$snapshots = new SnapshotStore($dir);

check('a project without snapshots lists none', $snapshots->list('p1') === []);

$doc = ['revision' => 4, 'project' => ['id' => 'p1', 'name' => 'Game', 'assets' => [['id' => 'a']]]];
$first = $snapshots->create('p1', $doc, 'first');
$second = $snapshots->create('p1', ['revision' => 5] + $doc, 'second');
check('a snapshot keeps its name and the revision it copied', $first['name'] === 'first' && $first['revision'] === 4, $first);
check('two snapshots get two ids', $first['id'] !== $second['id']);
check('the summary carries no project', !isset($first['project']));
check('the snapshot file is not readable for the web server', (fileperms("{$dir}/p1/{$first['id']}.json") & 0o007) === 0);

$listed = $snapshots->list('p1');
check(
    'the list is newest first, also within one second',
    array_column($listed, 'name') === ['second', 'first'],
    array_column($listed, 'name'),
);
// The ids are random, so two files come back from the folder in the right order half the time
// anyway. With eight, the folder's own order matching by chance is one in 40320.
$more = new SnapshotStore("{$dir}/order");
foreach (range(1, 8) as $n) {
    $more->create('p', $doc, "n{$n}");
}
check(
    'eight made in a row list in reverse order of making',
    array_column($more->list('p'), 'name') === ['n8', 'n7', 'n6', 'n5', 'n4', 'n3', 'n2', 'n1'],
    array_column($more->list('p'), 'name'),
);

$loaded = $snapshots->load('p1', $first['id']);
check('a snapshot loads the project as it was copied', $loaded !== null && $loaded['project'] === $doc['project'], $loaded);
check('a snapshot of another project is not found', $snapshots->load('p2', $first['id']) === null);

file_put_contents("{$dir}/p1/broken.json", '{"id":"broken"');
check('a broken file is left out of the list', count($snapshots->list('p1')) === 2, $snapshots->list('p1'));
unlink("{$dir}/p1/broken.json");

check('deleting a snapshot says so', $snapshots->delete('p1', $first['id']));
check('it is gone from the list', array_column($snapshots->list('p1'), 'name') === ['second']);
check('deleting it again says it was not there', !$snapshots->delete('p1', $first['id']));

$snapshots->create('p2', $doc, 'other');
$snapshots->deleteAll('p1');
check('deleting all removes the folder of that project', !is_dir("{$dir}/p1"));
check('and leaves the snapshots of other projects', count($snapshots->list('p2')) === 1);

exec('rm -rf ' . escapeshellarg($dir));

echo $failed === 0 ? "ALL PASSED – {$passed} checks\n" : "{$failed} FAILED, {$passed} passed\n";
exit($failed === 0 ? 0 : 1);