<?php

declare(strict_types=1);

namespace App\Tests\Unit\Administration\Application\Command\AssignTeacher;

use App\Administration\Application\Command\AssignTeacher\AssignTeacherCommand;
use App\Administration\Application\Command\AssignTeacher\AssignTeacherHandler;
use App\Administration\Domain\Exception\AffectationDejaExistanteException;
use App\Administration\Domain\Exception\ClasseNotFoundException;
use App\Administration\Domain\Exception\SubjectNotFoundException;
use App\Administration\Domain\Exception\UserNotFoundException;
use App\Administration\Domain\Model\SchoolClass\AcademicYearId;
use App\Administration\Domain\Model\SchoolClass\ClassName;
use App\Administration\Domain\Model\SchoolClass\SchoolClass;
use App\Administration\Domain\Model\SchoolClass\SchoolId;
use App\Administration\Domain\Model\SchoolClass\SchoolLevel;
use App\Administration\Domain\Model\Subject\Subject;
use App\Administration\Domain\Model\Subject\SubjectCode;
use App\Administration\Domain\Model\Subject\SubjectName;
use App\Administration\Domain\Model\TeacherAssignment\AssignmentStatus;
use App\Administration\Domain\Model\TeacherAssignment\TeacherAssignmentId;
use App\Administration\Domain\Model\User\Email;
use App\Administration\Domain\Model\User\Role;
use App\Administration\Domain\Model\User\User;
use App\Administration\Infrastructure\Persistence\InMemory\InMemoryClassRepository;
use App\Administration\Infrastructure\Persistence\InMemory\InMemorySubjectRepository;
use App\Administration\Infrastructure\Persistence\InMemory\InMemoryTeacherAssignmentRepository;
use App\Administration\Infrastructure\Persistence\InMemory\InMemoryUserRepository;
use App\Shared\Domain\Clock;
use App\Shared\Domain\Tenant\TenantId;
use DateTimeImmutable;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\TestCase;

final class AssignTeacherHandlerTest extends TestCase
{
    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440001';
    private const string TEACHER_ID = '550e8400-e29b-41d4-a716-446655440010';
    private const string CLASS_ID = '550e8400-e29b-41d4-a716-446655440020';
    private const string SUBJECT_ID = '550e8400-e29b-41d4-a716-446655440030';
    private const string ACADEMIC_YEAR_ID = '550e8400-e29b-41d4-a716-446655440040';
    private const string SCHOOL_ID = '550e8400-e29b-41d4-a716-446655440050';

    private InMemoryTeacherAssignmentRepository $assignmentRepository;
    private InMemoryUserRepository $userRepository;
    private InMemoryClassRepository $classRepository;
    private InMemorySubjectRepository $subjectRepository;
    private Clock $clock;

    protected function setUp(): void
    {
        $this->assignmentRepository = new InMemoryTeacherAssignmentRepository();
        $this->userRepository = new InMemoryUserRepository();
        $this->classRepository = new InMemoryClassRepository();
        $this->subjectRepository = new InMemorySubjectRepository();
        $this->clock = new class implements Clock {
            public function now(): DateTimeImmutable
            {
                return new DateTimeImmutable('2026-02-12 10:00:00');
            }
        };

        $this->seedTestData();
    }

    #[Test]
    public function itCreatesAssignmentSuccessfully(): void
    {
        $handler = $this->createHandler();
        $command = $this->createCommand();

        $assignment = $handler($command);

        self::assertNotEmpty((string) $assignment->id);
        self::assertSame(AssignmentStatus::ACTIVE, $assignment->status);
        self::assertTrue($assignment->estActive());
        self::assertNull($assignment->endDate);
    }

    #[Test]
    public function itPersistsAssignmentInRepository(): void
    {
        $handler = $this->createHandler();
        $command = $this->createCommand();

        $created = $handler($command);

        $assignment = $this->assignmentRepository->get(
            TeacherAssignmentId::fromString((string) $created->id),
            TenantId::fromString(self::TENANT_ID),
        );

        self::assertSame(AssignmentStatus::ACTIVE, $assignment->status);
    }

    #[Test]
    public function itThrowsExceptionWhenDuplicateAssignment(): void
    {
        $handler = $this->createHandler();
        $command = $this->createCommand();

        $handler($command);

        $this->expectException(AffectationDejaExistanteException::class);
        $handler($command);
    }

    #[Test]
    public function itAllowsSameTeacherDifferentSubject(): void
    {
        $secondSubjectId = '550e8400-e29b-41d4-a716-446655440031';
        $subject2 = Subject::creer(
            tenantId: TenantId::fromString(self::TENANT_ID),
            schoolId: SchoolId::fromString(self::SCHOOL_ID),
            name: new SubjectName('Français'),
            code: new SubjectCode('FR'),
            color: null,
            createdAt: new DateTimeImmutable('2026-01-15'),
        );
        // Reconstitute with known ID for test predictability
        $subject2 = Subject::reconstitute(
            id: \App\Administration\Domain\Model\Subject\SubjectId::fromString($secondSubjectId),
            tenantId: TenantId::fromString(self::TENANT_ID),
            schoolId: SchoolId::fromString(self::SCHOOL_ID),
            name: new SubjectName('Français'),
            code: new SubjectCode('FR'),
            color: null,
            status: \App\Administration\Domain\Model\Subject\SubjectStatus::ACTIVE,
            description: null,
            createdAt: new DateTimeImmutable('2026-01-15'),
            updatedAt: new DateTimeImmutable('2026-01-15'),
            deletedAt: null,
        );
        $this->subjectRepository->save($subject2);

        $handler = $this->createHandler();

        $assignment1 = $handler($this->createCommand());
        $assignment2 = $handler($this->createCommand(subjectId: $secondSubjectId));

        self::assertFalse($assignment1->id->equals($assignment2->id));
    }

    #[Test]
    public function itAllowsDifferentTeacherSameClassSubject(): void
    {
        $secondTeacherId = '550e8400-e29b-41d4-a716-446655440011';
        $teacher2 = User::creer(
            email: new Email('teacher2@example.com'),
            role: Role::PROF,
            tenantId: TenantId::fromString(self::TENANT_ID),
            schoolName: 'École Test',
            dateNaissance: null,
            createdAt: new DateTimeImmutable('2026-01-15'),
        );
        // Reconstitute with known ID
        $teacher2 = User::reconstitute(
            id: \App\Administration\Domain\Model\User\UserId::fromString($secondTeacherId),
            email: new Email('teacher2@example.com'),
            roles: [Role::PROF],
            tenantId: TenantId::fromString(self::TENANT_ID),
            schoolName: 'École Test',
            statut: \App\Administration\Domain\Model\User\StatutCompte::EN_ATTENTE,
            dateNaissance: null,
            createdAt: new DateTimeImmutable('2026-01-15'),
            hashedPassword: null,
            activatedAt: null,
            consentementParental: null,
        );
        $this->userRepository->save($teacher2);

        $handler = $this->createHandler();

        $assignment1 = $handler($this->createCommand());
        $assignment2 = $handler($this->createCommand(teacherId: $secondTeacherId));

        self::assertFalse($assignment1->id->equals($assignment2->id));
    }

    #[Test]
    public function itThrowsWhenTeacherDoesNotExist(): void
    {
        $handler = $this->createHandler();

        $this->expectException(UserNotFoundException::class);
        $handler($this->createCommand(teacherId: '550e8400-e29b-41d4-a716-446655440099'));
    }

    #[Test]
    public function itThrowsWhenClassDoesNotExist(): void
    {
        $handler = $this->createHandler();

        $this->expectException(ClasseNotFoundException::class);
        $handler($this->createCommand(classId: '550e8400-e29b-41d4-a716-446655440099'));
    }

    #[Test]
    public function itThrowsWhenSubjectDoesNotExist(): void
    {
        $handler = $this->createHandler();

        $this->expectException(SubjectNotFoundException::class);
        $handler($this->createCommand(subjectId: '550e8400-e29b-41d4-a716-446655440099'));
    }

    private function seedTestData(): void
    {
        $tenantId = TenantId::fromString(self::TENANT_ID);

        // Create teacher
        $teacher = User::reconstitute(
            id: \App\Administration\Domain\Model\User\UserId::fromString(self::TEACHER_ID),
            email: new Email('teacher@example.com'),
            roles: [Role::PROF],
            tenantId: $tenantId,
            schoolName: 'École Test',
            statut: \App\Administration\Domain\Model\User\StatutCompte::EN_ATTENTE,
            dateNaissance: null,
            createdAt: new DateTimeImmutable('2026-01-15'),
            hashedPassword: null,
            activatedAt: null,
            consentementParental: null,
        );
        $this->userRepository->save($teacher);

        // Create class
        $class = SchoolClass::reconstitute(
            id: \App\Administration\Domain\Model\SchoolClass\ClassId::fromString(self::CLASS_ID),
            tenantId: $tenantId,
            schoolId: SchoolId::fromString(self::SCHOOL_ID),
            academicYearId: AcademicYearId::fromString(self::ACADEMIC_YEAR_ID),
            name: new ClassName('6ème A'),
            level: SchoolLevel::SIXIEME,
            capacity: 30,
            status: \App\Administration\Domain\Model\SchoolClass\ClassStatus::ACTIVE,
            description: null,
            createdAt: new DateTimeImmutable('2026-01-15'),
            updatedAt: new DateTimeImmutable('2026-01-15'),
            deletedAt: null,
        );
        $this->classRepository->save($class);

        // Create subject
        $subject = Subject::reconstitute(
            id: \App\Administration\Domain\Model\Subject\SubjectId::fromString(self::SUBJECT_ID),
            tenantId: $tenantId,
            schoolId: SchoolId::fromString(self::SCHOOL_ID),
            name: new SubjectName('Mathématiques'),
            code: new SubjectCode('MATH'),
            color: null,
            status: \App\Administration\Domain\Model\Subject\SubjectStatus::ACTIVE,
            description: null,
            createdAt: new DateTimeImmutable('2026-01-15'),
            updatedAt: new DateTimeImmutable('2026-01-15'),
            deletedAt: null,
        );
        $this->subjectRepository->save($subject);
    }

    private function createHandler(): AssignTeacherHandler
    {
        return new AssignTeacherHandler(
            $this->assignmentRepository,
            $this->userRepository,
            $this->classRepository,
            $this->subjectRepository,
            $this->clock,
        );
    }

    private function createCommand(
        ?string $teacherId = null,
        ?string $classId = null,
        ?string $subjectId = null,
    ): AssignTeacherCommand {
        return new AssignTeacherCommand(
            tenantId: self::TENANT_ID,
            teacherId: $teacherId ?? self::TEACHER_ID,
            classId: $classId ?? self::CLASS_ID,
            subjectId: $subjectId ?? self::SUBJECT_ID,
            academicYearId: self::ACADEMIC_YEAR_ID,
        );
    }
}