<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\GroupClass;

use Brain\Monkey\Functions;
use Mockery;
use Unsupervised\Schedular\GroupClass\Enrollment;
use Unsupervised\Schedular\GroupClass\EnrollmentRepository;
use Unsupervised\Schedular\GroupClass\GroupClassController;
use Unsupervised\Schedular\Offering\Offering;
use Unsupervised\Schedular\Offering\OfferingRepository;
use Unsupervised\Schedular\Payment\Payment;
use Unsupervised\Schedular\Payment\PaymentRepository;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class GroupClassControllerTest extends TestCase
{
    private EnrollmentRepository&Mockery\MockInterface $enrollments;
    private OfferingRepository&Mockery\MockInterface $offerings;
    private PaymentRepository&Mockery\MockInterface $payments;
    private GroupClassController $controller;

    protected function setUp(): void
    {
        parent::setUp();

        $this->enrollments = Mockery::mock(EnrollmentRepository::class);
        $this->offerings   = Mockery::mock(OfferingRepository::class);
        $this->payments    = Mockery::mock(PaymentRepository::class);
        $this->controller  = new GroupClassController($this->enrollments, $this->offerings, $this->payments);

        Functions\when('current_user_can')->justReturn(true);
        Functions\when('get_current_user_id')->justReturn(3);
    }

    private function offering(int $id, string $title, ?int $capacity): Offering
    {
        return new Offering(
            instructorId: 3,
            kind: Offering::KIND_GROUP_CLASS,
            title: $title,
            capacity: $capacity,
            id: $id,
        );
    }

    private function renderInstructor(): string
    {
        ob_start();
        $this->controller->renderInstructorPage();

        return (string) ob_get_clean();
    }

    public function testInstructorPageListsClassWithCapacityAndRoster(): void
    {
        Functions\when('get_userdata')->justReturn((object) ['display_name' => 'Ada Lovelace']);

        $offering   = $this->offering(8, 'Choir', 10);
        $enrollment = new Enrollment(offeringId: 8, studentId: 5, instructorId: 3, paymentId: 42, id: 1);

        $this->offerings->shouldReceive('findAll')->once()
            ->with(3, Offering::KIND_GROUP_CLASS)->andReturn([$offering]);
        $this->enrollments->shouldReceive('findByInstructor')->once()->with(3)->andReturn([$enrollment]);
        $this->payments->shouldReceive('findById')->once()->with(42)->andReturn(
            new Payment(studentId: 5, instructorId: 3, registrationType: Payment::REG_ENROLLMENT, registrationId: 1, amount: 100.0, status: Payment::STATUS_PAID, id: 42)
        );

        $html = $this->renderInstructor();

        self::assertStringContainsString('Choir', $html);
        self::assertStringContainsString('(1 / 10 enrolled)', $html);
        self::assertStringContainsString('Ada Lovelace', $html);
        self::assertStringContainsString('paid', $html);
    }

    public function testEnrolmentCountExcludesCancelledButRosterKeepsThem(): void
    {
        Functions\when('get_userdata')->justReturn((object) ['display_name' => 'Grace Hopper']);

        $offering  = $this->offering(8, 'Band', null);
        $active    = new Enrollment(offeringId: 8, studentId: 5, instructorId: 3, id: 1);
        $cancelled = new Enrollment(offeringId: 8, studentId: 6, instructorId: 3, status: Enrollment::STATUS_CANCELLED, id: 2);

        $this->offerings->shouldReceive('findAll')->once()->andReturn([$offering]);
        $this->enrollments->shouldReceive('findByInstructor')->once()->andReturn([$active, $cancelled]);

        $html = $this->renderInstructor();

        // Unlimited capacity offering counts only the active enrolment.
        self::assertStringContainsString('(1 enrolled)', $html);
        // But the roster still shows the cancelled row.
        self::assertStringContainsString('cancelled', $html);
    }

    public function testFreeEnrolmentShowsDashForPayment(): void
    {
        Functions\when('get_userdata')->justReturn((object) ['display_name' => 'Alan Turing']);

        $offering   = $this->offering(8, 'Theory', 5);
        $enrollment = new Enrollment(offeringId: 8, studentId: 5, instructorId: 3, paymentId: null, id: 1);

        $this->offerings->shouldReceive('findAll')->once()->andReturn([$offering]);
        $this->enrollments->shouldReceive('findByInstructor')->once()->andReturn([$enrollment]);
        $this->payments->shouldReceive('findById')->never();

        $html = $this->renderInstructor();

        self::assertStringContainsString('—', $html);
    }

    public function testEnrolmentsForOtherClassesAreNotMixedIn(): void
    {
        Functions\when('get_userdata')->justReturn((object) ['display_name' => 'Katherine Johnson']);

        $offering = $this->offering(8, 'Choir', 5);
        $mine     = new Enrollment(offeringId: 8, studentId: 5, instructorId: 3, id: 1);
        $other    = new Enrollment(offeringId: 9, studentId: 6, instructorId: 3, id: 2);

        $this->offerings->shouldReceive('findAll')->once()->andReturn([$offering]);
        $this->enrollments->shouldReceive('findByInstructor')->once()->andReturn([$mine, $other]);

        $html = $this->renderInstructor();

        self::assertStringContainsString('(1 / 5 enrolled)', $html);
    }

    public function testClassWithNoEnrolmentsShowsEmptyMessage(): void
    {
        $offering = $this->offering(8, 'Jazz', 5);

        $this->offerings->shouldReceive('findAll')->once()->andReturn([$offering]);
        $this->enrollments->shouldReceive('findByInstructor')->once()->andReturn([]);

        $html = $this->renderInstructor();

        self::assertStringContainsString('No enrolments yet.', $html);
    }

    public function testInstructorWithNoClassesShowsEmptyMessage(): void
    {
        $this->offerings->shouldReceive('findAll')->once()->andReturn([]);
        $this->enrollments->shouldReceive('findByInstructor')->once()->andReturn([]);

        $html = $this->renderInstructor();

        self::assertStringContainsString('You have no group classes.', $html);
    }

    public function testDeniesUsersWithoutViewLessonsCapability(): void
    {
        Functions\when('current_user_can')->justReturn(false);
        Functions\expect('wp_die')->once()->andThrow(new \RuntimeException('denied'));

        $this->expectException(\RuntimeException::class);

        $this->controller->renderInstructorPage();
    }
}