<?php

namespace Tests\Unit\Deployment;

use PHPUnit\Framework\TestCase;
use Symfony\Component\Process\Process;

class DeploymentSyncLockTest extends TestCase
{
    public function test_container_replacement_waits_for_sync_and_fails_safely_on_lock_timeout(): void
    {
        foreach (['activate-release.sh', 'activate-incremental-release.sh'] as $script) {
            $contents = file_get_contents(dirname(__DIR__, 3) . '/deploy/' . $script);
            $start = strpos($contents, 'exec 8>/run/caiwu-upstream-sync.lock');
            $end = strpos($contents, 'PREVIOUS_IMAGE=', $start ?: 0);
            $this->assertNotFalse($start, $script);
            $this->assertNotFalse($end, $script);
            $this->assertLessThan(strpos($contents, 'docker compose -f compose.jiangling.yml up'), $end);
            $guard = substr($contents, $start, $end - $start);

            $directory = sys_get_temp_dir() . '/caiwu-deploy-lock-' . bin2hex(random_bytes(8));
            mkdir($directory, 0700);
            $holder = new Process(['sh', '-c', 'exec 8>"$1"; flock 8; touch "$2"; sleep 2', 'holder', $directory . '/sync.lock', $directory . '/held']);
            try {
                $holder->start();
                $deadline = microtime(true) + 3;
                while (! file_exists($directory . '/held') && microtime(true) < $deadline) {
                    usleep(10000);
                }
                $this->assertFileExists($directory . '/held');
                $guard = str_replace('/run/caiwu-upstream-sync.lock', $directory . '/sync.lock', $guard);
                $guard .= "touch '$directory/activated'\n";

                $timeout = new Process(['sh', '-c', str_replace('-w 1800', '-w 0', $guard)]);
                $timeout->run();
                $this->assertSame(1, $timeout->getExitCode());
                $this->assertStringContainsString('application container was not replaced', $timeout->getErrorOutput());
                $this->assertFileDoesNotExist($directory . '/activated');

                $release = new Process(['sh', '-c', $guard]);
                $release->start();
                usleep(100000);
                $this->assertTrue($release->isRunning());
                $this->assertFileDoesNotExist($directory . '/activated');
                $release->wait();
                $this->assertTrue($release->isSuccessful(), $release->getErrorOutput());
                $this->assertFileExists($directory . '/activated');
            } finally {
                $holder->stop();
                foreach (glob($directory . '/*') as $file) {
                    unlink($file);
                }
                rmdir($directory);
            }
        }
    }
}