<?php

declare(strict_types=1);

namespace KTXT\Unit\Service;

use KTXC\Context\IdentityContextInterface;
use KTXC\Context\TenantContextInterface;
use KTXC\Service\UserAccountsService;
use KTXC\Stores\UserAccountsStore;
use KTXC\User\Event\UserCreatedEvent;
use KTXC\User\Event\UserDeletingEvent;
use KTXC\User\Event\UserUpdatedEvent;
use KTXF\Event\EventDispatcherInterface;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\Attributes\TestDox;
use PHPUnit\Framework\TestCase;

final class UserAccountsServiceTest extends TestCase
{
    #[Test]
    #[TestDox('Successful user creation and deletion emit complete lifecycle events')]
    public function emitsLifecycleEvents(): void
    {
        $user = [
            'uid' => 'user-a',
            'identity' => 'person@example.test',
            'label' => 'Person',
            'enabled' => true,
            'roles' => ['member'],
        ];

        $tenant = $this->createStub(TenantContextInterface::class);
        $tenant->method('requireIdentifier')->willReturn('tenant-a');
        $identity = $this->createStub(IdentityContextInterface::class);
        $identity->method('identifier')->willReturn('actor-a');
        $store = $this->createMock(UserAccountsStore::class);
        $store->expects($this->once())
            ->method('createUser')
            ->with('tenant-a', ['identity' => 'person@example.test'])
            ->willReturn($user);
        $store->expects($this->once())
            ->method('fetchByIdentifier')
            ->with('tenant-a', 'user-a')
            ->willReturn($user);
        $operations = [];
        $store->expects($this->once())
            ->method('deleteUser')
            ->with('tenant-a', 'user-a')
            ->willReturnCallback(static function () use (&$operations): bool {
                $operations[] = 'delete';
                return true;
            });

        $emitted = [];
        $events = $this->createMock(EventDispatcherInterface::class);
        $events->expects($this->exactly(2))
            ->method('dispatch')
            ->willReturnCallback(static function ($event) use (&$emitted, &$operations): void {
                $emitted[] = $event;
                if ($event instanceof UserDeletingEvent) {
                    $operations[] = 'event';
                }
            });

        $service = new UserAccountsService($tenant, $identity, $store, $events);

        self::assertSame($user, $service->createUser(['identity' => 'person@example.test']));
        self::assertTrue($service->deleteUser('user-a'));
        self::assertInstanceOf(UserCreatedEvent::class, $emitted[0]);
        self::assertInstanceOf(UserDeletingEvent::class, $emitted[1]);
        self::assertSame('actor-a', $emitted[0]->actorIdentifier());
        self::assertSame('tenant-a', $emitted[1]->getTenantId());
        self::assertSame(['event', 'delete'], $operations);
    }

    #[Test]
    #[TestDox('Deleting event precedes a failed persistence attempt')]
    public function emitsBeforeFailedDeletion(): void
    {
        $store = $this->createStub(UserAccountsStore::class);
        $store->method('fetchByIdentifier')->willReturn([
            'uid' => 'user-a',
            'identity' => 'person@example.test',
        ]);
        $store->method('deleteUser')->willReturn(false);
        $events = $this->createMock(EventDispatcherInterface::class);
        $events->expects($this->once())
            ->method('dispatch')
            ->with(self::isInstanceOf(UserDeletingEvent::class));

        $tenant = $this->createStub(TenantContextInterface::class);
        $tenant->method('requireIdentifier')->willReturn('tenant-a');
        $service = new UserAccountsService(
            $tenant,
            $this->createStub(IdentityContextInterface::class),
            $store,
            $events,
        );

        self::assertFalse($service->deleteUser('user-a'));
    }

    #[Test]
    #[TestDox('Successful updates emit the persisted user snapshot after storage')]
    public function emitsAfterSuccessfulUpdate(): void
    {
        $updatedUser = [
            'uid' => 'user-a',
            'identity' => 'person@example.test',
            'label' => 'Updated Person',
            'enabled' => true,
            'roles' => ['admin'],
        ];
        $operations = [];
        $store = $this->createMock(UserAccountsStore::class);
        $store->expects($this->once())
            ->method('updateUser')
            ->with('tenant-a', 'user-a', ['label' => 'Updated Person'])
            ->willReturnCallback(static function () use (&$operations): bool {
                $operations[] = 'update';
                return true;
            });
        $store->expects($this->once())
            ->method('fetchByIdentifier')
            ->with('tenant-a', 'user-a')
            ->willReturnCallback(static function () use (&$operations, $updatedUser): array {
                $operations[] = 'fetch';
                return $updatedUser;
            });
        $events = $this->createMock(EventDispatcherInterface::class);
        $events->expects($this->once())
            ->method('dispatch')
            ->with(self::callback(static function ($event) use (&$operations): bool {
                $operations[] = 'event';
                return $event instanceof UserUpdatedEvent
                    && $event->userLabel() === 'Updated Person'
                    && $event->userRoles() === ['admin'];
            }));
        $tenant = $this->createStub(TenantContextInterface::class);
        $tenant->method('requireIdentifier')->willReturn('tenant-a');
        $identity = $this->createStub(IdentityContextInterface::class);
        $identity->method('identifier')->willReturn('actor-a');
        $service = new UserAccountsService($tenant, $identity, $store, $events);

        self::assertTrue($service->updateUser('user-a', ['label' => 'Updated Person']));
        self::assertSame(['update', 'fetch', 'event'], $operations);
    }

    #[Test]
    #[TestDox('Unchanged users do not emit an updated event')]
    public function ignoresUnchangedUser(): void
    {
        $store = $this->createMock(UserAccountsStore::class);
        $store->expects($this->once())->method('updateUser')->willReturn(false);
        $store->expects($this->never())->method('fetchByIdentifier');
        $events = $this->createMock(EventDispatcherInterface::class);
        $events->expects($this->never())->method('dispatch');
        $tenant = $this->createStub(TenantContextInterface::class);
        $tenant->method('requireIdentifier')->willReturn('tenant-a');
        $service = new UserAccountsService(
            $tenant,
            $this->createStub(IdentityContextInterface::class),
            $store,
            $events,
        );

        self::assertFalse($service->updateUser('user-a', ['label' => 'Person']));
    }

    #[Test]
    #[TestDox('Missing users do not emit a deleting event')]
    public function ignoresMissingUser(): void
    {
        $store = $this->createStub(UserAccountsStore::class);
        $store->method('fetchByIdentifier')->willReturn(null);
        $events = $this->createMock(EventDispatcherInterface::class);
        $events->expects($this->never())->method('dispatch');

        $tenant = $this->createStub(TenantContextInterface::class);
        $tenant->method('requireIdentifier')->willReturn('tenant-a');
        $service = new UserAccountsService(
            $tenant,
            $this->createStub(IdentityContextInterface::class),
            $store,
            $events,
        );

        self::assertFalse($service->deleteUser('missing'));
    }
}