<?php

use Symfony\Component\Process\Process;

require_once __DIR__.'/../../bootstrap/helpers/docker.php';

function runRailpackLockScript(string $command, string $setup = ''): Process
{
    $directory = sys_get_temp_dir().'/railpack-lock-'.bin2hex(random_bytes(8));
    mkdir($directory);

    try {
        $script = str_replace('/root/.docker/buildx/coolify-railpack.lock', $directory.'/builder.lock', $setup.railpackBuilderLockedScript($command));
        $process = new Process(['bash', '-c', $script]);
        $process->run();

        return $process;
    } finally {
        @unlink($directory.'/builder.lock');
        rmdir($directory);
    }
}

test('a failed shared lock prevents the builder command from running', function () {
    $process = runRailpackLockScript('printf build-ran', 'flock() { return 73; }; ');

    expect($process->getExitCode())->toBe(73);
    expect($process->getOutput())->toBe('');
});

test('the builder stops after a failed command without hiding its exit status', function () {
    $process = runRailpackLockScript('(exit 42)', 'exec 3>&1; docker() { printf stopped >&3; return 0; }; ');

    expect($process->getExitCode())->toBe(42);
    expect($process->getOutput())->toBe('stopped');
});

test('a held shared lock prevents stopping the builder', function () {
    $process = runRailpackLockScript('printf built', 'exec 8>/root/.docker/buildx/coolify-railpack.lock; flock -s 8; docker() { exit 99; }; ');

    expect($process->getExitCode())->toBe(0);
    expect($process->getOutput())->toBe('built');
});

test('concurrent builds bootstrap the builder one at a time', function () {
    $directory = sys_get_temp_dir().'/railpack-bootstrap-'.bin2hex(random_bytes(8));
    mkdir($directory);

    try {
        // The fake bootstrap takes time, like buildkitd that starts but does not listen yet.
        $setup = "docker() { if [ \"\$2\" = inspect ]; then echo start >> {$directory}/log; sleep 0.3; echo end >> {$directory}/log; fi; }; ";
        $script = str_replace(
            ['/root/.docker/buildx/coolify-railpack.lock', '/root/.docker/buildx/coolify-railpack-bootstrap.lock'],
            [$directory.'/builder.lock', $directory.'/bootstrap.lock'],
            $setup.railpackBuilderLockedScript(railpackBuilderBootstrapScript().'; true'),
        );

        $builds = [new Process(['bash', '-c', $script]), new Process(['bash', '-c', $script])];
        foreach ($builds as $build) {
            $build->start();
        }
        foreach ($builds as $build) {
            $build->wait();
            expect($build->getExitCode())->toBe(0);
        }

        expect(file($directory.'/log', FILE_IGNORE_NEW_LINES))->toBe(['start', 'end', 'start', 'end']);
    } finally {
        array_map('unlink', glob($directory.'/*'));
        rmdir($directory);
    }
});