<?php

namespace Tests\Feature\Schedule;

use App\Auth\CreateSessionDto;
use App\Auth\SessionRepository;
use App\Element\CreateElementDto;
use App\Element\ElementRepository;
use App\Http\Middleware\AuthMiddleware;
use App\Set\CreateSetDto;
use App\Set\Set;
use App\Set\SetRepository;
use App\Shared\ValueObject\EmailAddress;
use App\User\CreateUserDto;
use App\User\User;
use App\User\UserRepository;
use DateTimeImmutable;
use DateTimeZone;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Testing\TestResponse;
use Tests\TestCase;

class ScheduleEndpointTest extends TestCase
{
    use RefreshDatabase;

    public function test_it_creates_and_returns_a_schedule(): void
    {
        $user = $this->createUser('reader@example.com');
        $creator = $this->createUser('creator@example.com');
        $set = $this->createSet($creator, 'Bible');
        $repository = app(ElementRepository::class);
        $genesis = $repository->create(new CreateElementDto(
            set: $set,
            name: 'Genesis',
            kind: 'book',
            parentElement: null,
        ));
        $creation = $repository->create(new CreateElementDto(
            set: $set,
            name: 'Creation',
            kind: 'portion',
            parentElement: $genesis,
        ));
        $chapterOne = $repository->create(new CreateElementDto(
            set: $set,
            name: 'Chapter 1',
            kind: 'chapter',
            parentElement: $creation,
        ));
        $exodus = $repository->create(new CreateElementDto(
            set: $set,
            name: 'Exodus',
            kind: 'book',
            parentElement: null,
        ));
        $chapterTwo = $repository->create(new CreateElementDto(
            set: $set,
            name: 'Chapter 1',
            kind: 'chapter',
            parentElement: $exodus,
        ));
        $this->createSession($user, 'valid-token');

        $response = $this->credentialedPost('/api/schedules', [
            'setId' => $set->getId(),
            'elementKind' => 'chapter',
            'startDate' => '2026-08-10',
            'targetDate' => '2026-08-12',
        ]);

        $response->assertCreated()->assertExactJson([
            'schedule' => [
                'id' => 1,
                'set' => [
                    'id' => $set->getId(),
                    'name' => 'Bible',
                ],
                'elementKind' => 'chapter',
                'startDate' => '2026-08-10',
                'targetDate' => '2026-08-12',
                'assignmentCount' => 2,
                'days' => [
                    [
                        'date' => '2026-08-10',
                        'assignments' => [
                            [
                                'element' => [
                                    'id' => $chapterOne->getId(),
                                    'name' => 'Chapter 1',
                                    'kind' => 'chapter',
                                    'path' => [
                                        'Genesis',
                                        'Creation',
                                        'Chapter 1',
                                    ],
                                ],
                            ],
                        ],
                    ],
                    [
                        'date' => '2026-08-11',
                        'assignments' => [],
                    ],
                    [
                        'date' => '2026-08-12',
                        'assignments' => [
                            [
                                'element' => [
                                    'id' => $chapterTwo->getId(),
                                    'name' => 'Chapter 1',
                                    'kind' => 'chapter',
                                    'path' => [
                                        'Exodus',
                                        'Chapter 1',
                                    ],
                                ],
                            ],
                        ],
                    ],
                ],
            ],
        ]);
        $this->assertDatabaseHas('schedules', [
            'user_id' => $user->getId(),
            'set_id' => $set->getId(),
            'element_kind' => 'chapter',
            'start_date' => '2026-08-10',
            'target_date' => '2026-08-12',
        ]);
        $this->assertDatabaseCount('schedule_assignments', 2);

        $this->credentialedGet('/api/schedules/1')
            ->assertOk()
            ->assertExactJson($response->json());
    }

    public function test_it_lists_only_the_users_schedules_newest_first(): void
    {
        $user = $this->createUser('reader@example.com');
        $otherUser = $this->createUser('other@example.com');
        $set = $this->createSet($user, 'Course');
        app(ElementRepository::class)->create(new CreateElementDto(
            set: $set,
            name: 'Welcome',
            kind: 'lesson',
            parentElement: null,
        ));
        $this->createSession($user, 'valid-token');
        $this->createSession($otherUser, 'other-token');

        $this->credentialedPost('/api/schedules', [
            'setId' => $set->getId(),
            'elementKind' => 'lesson',
            'startDate' => '2026-08-01',
            'targetDate' => '2026-08-01',
        ])->assertCreated();
        $this->credentialedPost('/api/schedules', [
            'setId' => $set->getId(),
            'elementKind' => 'lesson',
            'startDate' => '2026-09-01',
            'targetDate' => '2026-09-01',
        ])->assertCreated();
        $this->withCredentials()
            ->withUnencryptedCookie(
                AuthMiddleware::COOKIE_NAME,
                'other-token',
            )->postJson('/api/schedules', [
                'setId' => $set->getId(),
                'elementKind' => 'lesson',
                'startDate' => '2026-10-01',
                'targetDate' => '2026-10-01',
            ])->assertCreated();

        $this->credentialedGet('/api/schedules')
            ->assertOk()
            ->assertExactJson([
                'schedules' => [
                    [
                        'id' => 2,
                        'set' => [
                            'id' => $set->getId(),
                            'name' => 'Course',
                        ],
                        'elementKind' => 'lesson',
                        'startDate' => '2026-09-01',
                        'targetDate' => '2026-09-01',
                        'assignmentCount' => 1,
                    ],
                    [
                        'id' => 1,
                        'set' => [
                            'id' => $set->getId(),
                            'name' => 'Course',
                        ],
                        'elementKind' => 'lesson',
                        'startDate' => '2026-08-01',
                        'targetDate' => '2026-08-01',
                        'assignmentCount' => 1,
                    ],
                ],
            ]);
    }

    public function test_it_hides_another_users_schedule(): void
    {
        $owner = $this->createUser('owner@example.com');
        $viewer = $this->createUser('viewer@example.com');
        $set = $this->createSet($owner, 'Course');
        app(ElementRepository::class)->create(new CreateElementDto(
            set: $set,
            name: 'Welcome',
            kind: 'lesson',
            parentElement: null,
        ));
        $this->createSession($owner, 'owner-token');
        $this->createSession($viewer, 'viewer-token');

        $this->withCredentials()
            ->withUnencryptedCookie(
                AuthMiddleware::COOKIE_NAME,
                'owner-token',
            )->postJson('/api/schedules', [
                'setId' => $set->getId(),
                'elementKind' => 'lesson',
                'startDate' => '2026-08-01',
                'targetDate' => '2026-08-01',
            ])->assertCreated();

        $this->withCredentials()
            ->withUnencryptedCookie(
                AuthMiddleware::COOKIE_NAME,
                'viewer-token',
            )->getJson('/api/schedules/1')
            ->assertNotFound()
            ->assertExactJson(['error' => 'schedule not found']);
    }

    public function test_it_rejects_invalid_creation_input(): void
    {
        $user = $this->createUser('reader@example.com');
        $this->createSession($user, 'valid-token');

        $this->credentialedPost('/api/schedules', [
            'setId' => 999,
            'elementKind' => 'chapter',
            'startDate' => '2026-08-12',
            'targetDate' => '2026-08-10',
        ])->assertNotFound()->assertExactJson([
            'error' => 'set not found',
        ]);
    }

    public function test_schedule_endpoints_require_authentication(): void
    {
        $this->getJson('/api/schedules')->assertStatus(401);
        $this->getJson('/api/schedules/1')->assertStatus(401);
        $this->postJson('/api/schedules', [])->assertStatus(401);
    }

    private function createUser(string $email): User
    {
        return app(UserRepository::class)->create(new CreateUserDto(
            email: new EmailAddress($email),
            passwordHash: 'hashed-password',
        ));
    }

    private function createSet(User $user, string $name): Set
    {
        return app(SetRepository::class)->create(new CreateSetDto(
            name: $name,
            creator: $user,
        ));
    }

    private function createSession(User $user, string $token): void
    {
        $createdAt = new DateTimeImmutable(
            '2026-08-03T12:00:00',
            new DateTimeZone('UTC'),
        );
        app(SessionRepository::class)->create(new CreateSessionDto(
            token: $token,
            user: $user,
            createdAt: $createdAt,
            expiresAt: $createdAt->modify('+7 days'),
        ));
    }

    /**
     * @param array<string, mixed> $payload
     */
    private function credentialedPost(
        string $uri,
        array $payload,
    ): TestResponse {
        return $this->withCredentials()
            ->withUnencryptedCookie(
                AuthMiddleware::COOKIE_NAME,
                'valid-token',
            )->postJson($uri, $payload);
    }

    private function credentialedGet(string $uri): TestResponse
    {
        return $this->withCredentials()
            ->withUnencryptedCookie(
                AuthMiddleware::COOKIE_NAME,
                'valid-token',
            )->getJson($uri);
    }
}