<?php

namespace Tests\Unit\ScheduledNode\UseCases;

use App\Exceptions\BadRequestException;
use App\Node\Node;
use App\Plan\CreatePlanDto;
use App\ScheduledNode\CreateScheduledNodeDto;
use App\ScheduledNode\ScheduledNode;
use App\ScheduledNode\UseCases\GetTodaysSchedule;
use App\ScheduledNode\UseCases\GetTodaysScheduleRequest;
use App\Text\Text;
use App\User\UseCases\CreateUserDto;
use App\User\User;
use App\ValueObjects\EmailAddress;
use DateTimeImmutable;
use DomainException;
use PHPUnit\Framework\TestCase;
use Tests\Fakes\FakePlanRepository;
use Tests\Fakes\FakeScheduledNodeRepository;
use Tests\Fakes\FakeUserRepository;

class GetTodaysScheduleTest extends TestCase
{
    private FakeUserRepository $userRepo;

    private FakePlanRepository $planRepo;

    private FakeScheduledNodeRepository $scheduledNodeRepo;

    private GetTodaysSchedule $useCase;

    private User $user;

    protected function setUp(): void
    {
        $this->userRepo = new FakeUserRepository();
        $this->scheduledNodeRepo = new FakeScheduledNodeRepository();
        $this->planRepo = new FakePlanRepository();
        $this->user = $this->userRepo->create(new CreateUserDto(
            email: new EmailAddress('email@email.com'),
            passwordHash: 'hash',
            isAdmin: false,
        ));
        $plan = $this->planRepo->create(new CreatePlanDto(
            name: 'test plan',
            user: $this->user,
        ));
        $this->scheduledNodeRepo->create(new CreateScheduledNodeDto(
            date: new DateTimeImmutable('2025-01-02'),
            plan: $plan,
            node: new Node(
                id: 0,
                title: 'test node',
                text: new Text(id: 0, name: 'test text', user: $this->user),
                parentNode: null,
            ),
        ));

        $this->useCase = new GetTodaysSchedule(
            userRepo: $this->userRepo,
            scheduledNodeRepo: $this->scheduledNodeRepo,
        );
    }

    public function test_returns_array_of_scheduled_nodes(): void
    {
        $result = $this->useCase->execute(new GetTodaysScheduleRequest(
            date: '2025-01-02',
            userId: 0,
        ));

        $this->assertIsArray($result);
        $this->assertInstanceOf(ScheduledNode::class, $result[0]);
    }

    public function test_returns_all_unfinished_scheduled_nodes_up_until_today(): void
    {
        $this->scheduledNodeRepo->create(new CreateScheduledNodeDto(
            date: new DateTimeImmutable('2025-01-01'),
            plan: $this->planRepo->find(0),
            node: new Node(
                id: 0,
                title: 'test node',
                text: new Text(id: 0, name: 'test text', user: $this->user),
                parentNode: null,
            ),
        ));
        $result = $this->useCase->execute(new GetTodaysScheduleRequest(
            date: '2025-01-02',
            userId: 0,
        ));
        $this->assertEquals(2, count($result));
    }

    public function test_only_returns_uncompleted_nodes(): void
    {
        $node = $this->scheduledNodeRepo->create(
            new CreateScheduledNodeDto(
                date: new DateTimeImmutable('2025-01-01'),
                plan: $this->planRepo->find(0),
                node: new Node(
                    id: 0,
                    title: 'test node',
                    text: new Text(id: 0, name: 'test text', user: $this->user),
                    parentNode: null,
                ),
            )
        );
        $node->setCompleted(true);
        $this->scheduledNodeRepo->update($node);

        $result = $this->useCase->execute(new GetTodaysScheduleRequest(
            date: '2025-01-02',
            userId: 0,
        ));
        $this->assertEquals(1, count($result));
    }

    public function test_throws_if_date_is_null(): void
    {
        $this->expectException(BadRequestException::class);
        $this->expectExceptionMessage('date is required');

        $this->useCase->execute(new GetTodaysScheduleRequest(
            date: null,
            userId: 0,
        ));
    }

    public function test_throws_if_user_id_is_null(): void
    {
        $this->expectException(BadRequestException::class);
        $this->expectExceptionMessage('userId is required');

        $this->useCase->execute(new GetTodaysScheduleRequest(
            date: '2025-01-02',
            userId: null,
        ));
    }

    public function test_nonexistant_user_throws(): void
    {
        $this->expectException(DomainException::class);
        $this->expectExceptionMessage('User with id: 99 doesnt exist');

        $this->useCase->execute(new GetTodaysScheduleRequest(
            date: '2025-01-02',
            userId: 99,
        ));
    }

    public function test_returns_empty_array_when_user_has_no_scheduled_nodes(): void
    {
        $otherUser = $this->userRepo->create(new CreateUserDto(
            email: new EmailAddress('other@email.com'),
            passwordHash: 'hash',
            isAdmin: false,
        ));

        $result = $this->useCase->execute(new GetTodaysScheduleRequest(
            date: '2025-01-02',
            userId: $otherUser->getId(),
        ));

        $this->assertIsArray($result);
        $this->assertEquals(0, count($result));
    }

    public function test_excludes_scheduled_nodes_dated_after_today(): void
    {
        $this->scheduledNodeRepo->create(new CreateScheduledNodeDto(
            date: new DateTimeImmutable('2025-01-05'),
            plan: $this->planRepo->find(0),
            node: new Node(
                id: 0,
                title: 'future node',
                text: new Text(id: 0, name: 'test text', user: $this->user),
                parentNode: null,
            ),
        ));

        $result = $this->useCase->execute(new GetTodaysScheduleRequest(
            date: '2025-01-02',
            userId: 0,
        ));

        $this->assertEquals(1, count($result));
    }

    public function test_does_not_return_other_users_scheduled_nodes(): void
    {
        $otherUser = $this->userRepo->create(new CreateUserDto(
            email: new EmailAddress('other@email.com'),
            passwordHash: 'hash',
            isAdmin: false,
        ));
        $otherPlan = $this->planRepo->create(new CreatePlanDto(
            name: 'other plan',
            user: $otherUser,
        ));
        $this->scheduledNodeRepo->create(new CreateScheduledNodeDto(
            date: new DateTimeImmutable('2025-01-02'),
            plan: $otherPlan,
            node: new Node(
                id: 0,
                title: 'other node',
                text: new Text(id: 0, name: 'test text', user: $otherUser),
                parentNode: null,
            ),
        ));

        $result = $this->useCase->execute(new GetTodaysScheduleRequest(
            date: '2025-01-02',
            userId: 0,
        ));

        $this->assertEquals(1, count($result));
        $resultNode = array_values($result)[0];
        $this->assertEquals(
            0,
            $resultNode->getPlan()->getUser()->getId()
        );
    }
}