<?php

declare(strict_types=1);

namespace MeshVault\Tests\Unit\Console;

use MeshVault\Console\Console;
use MeshVault\Console\ConsoleServices;
use MeshVault\Indexer\ImportException;
use PHPUnit\Framework\TestCase;
use RuntimeException;

final class ConsoleTest extends TestCase
{
    public function testHelpIsSuccessfulAndListsEverySubcommand(): void
    {
        [$code, $out, $err] = $this->execute(['help']);

        self::assertSame(0, $code);
        self::assertSame('', $err);
        foreach (['import', 'worker', 'worker-once', '--ext'] as $fragment) {
            self::assertStringContainsString($fragment, $out);
        }
    }

    public function testMissingCommandIsAUsageError(): void
    {
        [$code, $out, $err] = $this->execute([]);

        self::assertSame(1, $code);
        self::assertSame('', $out);
        self::assertStringContainsString('Usage: meshvault', $err);
    }

    public function testUnknownCommandIsAUsageError(): void
    {
        [$code, , $err] = $this->execute(['nope']);

        self::assertSame(1, $code);
        self::assertStringContainsString('Unknown command', $err);
    }

    public function testImportWithoutSourceIsAUsageError(): void
    {
        [$code, , $err] = $this->execute(['import']);

        self::assertSame(1, $code);
        self::assertStringContainsString('import <source-path>', $err);
    }

    public function testImportRejectsExtraOperandsAndUnknownOptions(): void
    {
        [$code, , $err] = $this->execute(['import', 'a', 'b']);
        self::assertSame(1, $code);
        self::assertStringContainsString('one source path', $err);

        [$code, , $err] = $this->execute(['import', 'a', '--deep']);
        self::assertSame(1, $code);
        self::assertStringContainsString('Unknown option', $err);
        self::assertStringContainsString('--deep', $err);
    }

    public function testImportRejectsEmptyExtensionList(): void
    {
        foreach (['--ext=', '--ext= , '] as $option) {
            [$code, , $err] = $this->execute(['import', 'a', $option]);
            self::assertSame(1, $code, $option);
            self::assertStringContainsString('--ext', $err);
        }
    }

    public function testImportQueuesAJobWithDefaultExtensions(): void
    {
        $services = new FakeConsoleServices(importResult: 42);
        [$code, $out] = $this->execute(['import', '/srv/incoming'], $services);

        self::assertSame(0, $code);
        self::assertSame(
            [['/srv/incoming', ['stl', 'jpg', 'jpeg', 'png', 'gif', 'pdf', 'txt', 'md']]],
            $services->imports
        );
        self::assertStringContainsString('42', $out);
    }

    public function testImportNormalizesTheExtensionOption(): void
    {
        $services = new FakeConsoleServices(importResult: 7);
        [$code] = $this->execute(['import', '/srv/in', '--ext= STL , .3mf ,stl'], $services);

        self::assertSame(0, $code);
        self::assertSame([['/srv/in', ['stl', '3mf']]], $services->imports);
    }

    public function testImportFailureReportsTheReasonCodeAndExitsTwo(): void
    {
        $services = new FakeConsoleServices(importError: new ImportException('SCAN_EMPTY', 'Nothing found.'));
        [$code, $out, $err] = $this->execute(['import', '/srv/in'], $services);

        self::assertSame(2, $code);
        self::assertSame('', $out);
        self::assertStringContainsString('SCAN_EMPTY', $err);
        self::assertStringContainsString('Nothing found.', $err);
    }

    public function testUnexpectedFailureIsReportedWithoutLeakingDetails(): void
    {
        $services = new FakeConsoleServices(
            importError: new RuntimeException('SQLSTATE[08006] password=hunter2')
        );
        [$code, , $err] = $this->execute(['import', '/srv/in'], $services);

        self::assertSame(2, $code);
        self::assertStringNotContainsString('hunter2', $err);
        self::assertStringNotContainsString('#0 ', $err);
        self::assertStringContainsString('RuntimeException', $err);
    }

    public function testWorkerOnceReportsTheProcessedJob(): void
    {
        $services = new FakeConsoleServices(jobs: [11]);
        [$code, $out] = $this->execute(['worker-once'], $services);

        self::assertSame(0, $code);
        self::assertSame(1, $services->runs);
        self::assertStringContainsString('11', $out);
    }

    public function testWorkerOnceReportsAnIdleQueue(): void
    {
        $services = new FakeConsoleServices(jobs: [null]);
        [$code, $out] = $this->execute(['worker-once'], $services);

        self::assertSame(0, $code);
        self::assertStringContainsString('No pending import jobs', $out);
    }

    public function testWorkerOnceRejectsOperands(): void
    {
        [$code, , $err] = $this->execute(['worker-once', 'x']);

        self::assertSame(1, $code);
        self::assertStringContainsString('takes no arguments', $err);
    }

    public function testWorkerLoopsUntilTheIterationBoundAndSleepsWhenIdle(): void
    {
        $services = new FakeConsoleServices(jobs: [5, null, null]);
        $slept = [];
        [$code, $out] = $this->execute(
            ['worker', '--max-iterations=3', '--sleep=2'],
            $services,
            static function (int $seconds) use (&$slept): void {
                $slept[] = $seconds;
            }
        );

        self::assertSame(0, $code);
        self::assertSame(3, $services->runs);
        // Only idle passes sleep; a processed job is followed immediately by the next claim.
        self::assertSame([2, 2], $slept);
        self::assertStringContainsString('stopped', $out);
    }

    public function testWorkerStopsWhenAStopIsRequested(): void
    {
        $services = new FakeConsoleServices(jobs: [1, 2, 3]);
        $calls = 0;
        [$code, $out] = $this->execute(
            ['worker', '--max-iterations=99'],
            $services,
            null,
            static function () use (&$calls): bool {
                $calls++;
                return $calls > 2;
            }
        );

        self::assertSame(0, $code);
        self::assertSame(2, $services->runs);
        self::assertStringContainsString('stopped', $out);
    }

    public function testWorkerRejectsInvalidOptions(): void
    {
        foreach (['--max-iterations=0', '--max-iterations=x', '--sleep=-1', '--bogus', 'operand'] as $argument) {
            [$code, , $err] = $this->execute(['worker', $argument]);
            self::assertSame(1, $code, $argument);
            self::assertNotSame('', $err);
        }
    }

    public function testWorkerFailureExitsTwo(): void
    {
        $services = new FakeConsoleServices(
            workerError: new ImportException('LOCK_UNAVAILABLE', 'Another worker holds the library lock.')
        );
        [$code, , $err] = $this->execute(['worker', '--max-iterations=1'], $services);

        self::assertSame(2, $code);
        self::assertStringContainsString('LOCK_UNAVAILABLE', $err);
    }

    /** @return array{0: int, 1: string, 2: string} */
    private function execute(
        array $argv,
        ?ConsoleServices $services = null,
        ?callable $sleep = null,
        ?callable $stopRequested = null
    ): array {
        $out = fopen('php://memory', 'w+');
        $err = fopen('php://memory', 'w+');
        $console = new Console(
            $services ?? new FakeConsoleServices(),
            $out,
            $err,
            $sleep ?? static function (int $seconds): void {
            },
            $stopRequested ?? static fn (): bool => false
        );
        $code = $console->run($argv);
        rewind($out);
        rewind($err);
        return [$code, (string) stream_get_contents($out), (string) stream_get_contents($err)];
    }
}