<?php

declare(strict_types=1);

namespace KTXT\Unit\Runtime;

use KTXC\Application\Execution\ExecutionContext;
use KTXC\Application\Execution\ExecutionDescriptor;
use KTXC\Application\Execution\ExecutionOutcome;
use KTXC\Application\Execution\ExecutionScope;
use KTXC\Application\Execution\TerminationReport;
use KTXC\Context\IdentityContext;
use KTXC\Context\TenantContext;
use KTXC\KernelInterface;
use KTXC\Module\ModuleCollection;
use KTXC\Module\ModuleManager;
use KTXC\Runtime\Console\ConsoleRuntime;
use KTXC\Service\TenantService;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\Attributes\TestDox;
use PHPUnit\Framework\TestCase;
use Psr\Container\ContainerInterface;
use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Output\BufferedOutput;

final class ConsoleRuntimeTest extends TestCase
{
    #[Test]
    #[TestDox('Successful commands preserve their exit code and terminate')]
    public function succeeds(): void
    {
        $modules = $this->createStub(ModuleManager::class);
        $modules->method('list')->willReturn(new ModuleCollection());
        $kernel = $this->kernel(new ConsoleContainer([ModuleManager::class => $modules]));

        $exitCode = (new ConsoleRuntime($kernel))->run(
            new ArrayInput(['command' => 'list', '--raw' => true]),
            new BufferedOutput(),
        );

        self::assertSame(0, $exitCode);
        self::assertSame(1, $kernel->terminations);
        self::assertTrue($kernel->outcome?->successful);
    }

    #[Test]
    #[TestDox('Console failures terminate before being rethrown')]
    public function fails(): void
    {
        $kernel = $this->kernel(new ConsoleContainer([], new \RuntimeException('Discovery failed.')));

        try {
            (new ConsoleRuntime($kernel))->run(
                new ArrayInput(['command' => 'list']),
                new BufferedOutput(),
            );
            self::fail('Expected console discovery to fail.');
        } catch (\RuntimeException $error) {
            self::assertSame('Discovery failed.', $error->getMessage());
        }

        self::assertSame(1, $kernel->terminations);
        self::assertFalse($kernel->outcome?->successful);
    }

    #[Test]
    #[TestDox('Deferred termination failures do not replace command exit codes')]
    public function preservesExitCodes(): void
    {
        $modules = $this->createStub(ModuleManager::class);
        $modules->method('list')->willReturn(new ModuleCollection());
        $kernel = $this->kernel(new ConsoleContainer([ModuleManager::class => $modules]));
        $kernel->terminationReport = new TerminationReport(
            failures: [new \RuntimeException('Deferred listener failed.')],
        );

        $exitCode = (new ConsoleRuntime($kernel))->run(
            new ArrayInput(['command' => 'list', '--raw' => true]),
            new BufferedOutput(),
        );

        self::assertSame(0, $exitCode);
    }

    private function kernel(ContainerInterface $container): ConsoleKernel
    {
        return new ConsoleKernel(
            $container,
            new TenantContext($this->createStub(TenantService::class)),
            new IdentityContext(),
        );
    }
}

final class ConsoleKernel implements KernelInterface
{
    public int $terminations = 0;
    public ?ExecutionOutcome $outcome = null;
    public TerminationReport $terminationReport;

    public function __construct(
        private readonly ContainerInterface $services,
        private readonly TenantContext $tenantContext,
        private readonly IdentityContext $identityContext,
    ) {
        $this->terminationReport = new TerminationReport();
    }

    public function boot(): void
    {
    }

    public function beginExecution(ExecutionDescriptor $descriptor): ExecutionScope
    {
        return new ExecutionScope(
            $descriptor,
            ExecutionContext::fromDescriptor($descriptor),
            $this->tenantContext,
            $this->identityContext,
        );
    }

    public function terminateExecution(
        ExecutionScope $scope,
        ExecutionOutcome $outcome,
    ): TerminationReport {
        $this->terminations++;
        $this->outcome = $outcome;
        $scope->dispose();
        $scope->markTerminated();

        return $this->terminationReport;
    }

    public function shutdown(): void
    {
    }

    public function container(): ContainerInterface
    {
        return $this->services;
    }

    public function environment(): string
    {
        return 'test';
    }

    public function debug(): bool
    {
        return false;
    }
}

final class ConsoleContainer implements ContainerInterface
{
    public function __construct(
        private readonly array $services,
        private readonly ?\Throwable $failure = null,
    ) {
    }

    public function get(string $id): mixed
    {
        if ($this->failure !== null) {
            throw $this->failure;
        }

        return $this->services[$id];
    }

    public function has(string $id): bool
    {
        return isset($this->services[$id]);
    }
}