<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Auth;

use Brain\Monkey\Actions;
use Mockery;
use Unsupervised\Schedular\Auth\DeletedUserCleanup;
use Unsupervised\Schedular\Availability\AvailabilityRepository;
use Unsupervised\Schedular\Booking\BookingRepository;
use Unsupervised\Schedular\Booking\Lesson;
use Unsupervised\Schedular\GroupClass\Enrollment;
use Unsupervised\Schedular\GroupClass\EnrollmentRepository;
use Unsupervised\Schedular\Guardian\GuardianLink;
use Unsupervised\Schedular\Guardian\GuardianRepository;
use Unsupervised\Schedular\Guardian\GuardianService;
use Unsupervised\Schedular\Payment\PaymentService;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class DeletedUserCleanupTest extends TestCase
{
    private BookingRepository&Mockery\MockInterface $bookings;
    private AvailabilityRepository&Mockery\MockInterface $availability;
    private EnrollmentRepository&Mockery\MockInterface $enrollments;
    private PaymentService&Mockery\MockInterface $payments;
    private GuardianRepository&Mockery\MockInterface $links;
    private GuardianService&Mockery\MockInterface $guardians;
    private DeletedUserCleanup $cleanup;

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

        $this->bookings     = Mockery::mock(BookingRepository::class);
        $this->availability = Mockery::mock(AvailabilityRepository::class);
        $this->enrollments  = Mockery::mock(EnrollmentRepository::class);
        $this->payments     = Mockery::mock(PaymentService::class);
        $this->links        = Mockery::mock(GuardianRepository::class);
        $this->guardians    = Mockery::mock(GuardianService::class);

        // Most accounts have nobody linked to them; the guardian tests say so.
        $this->links->shouldReceive('findByGuardian')->andReturn([])->byDefault();

        $this->cleanup = new DeletedUserCleanup(
            $this->bookings,
            $this->availability,
            $this->enrollments,
            $this->payments,
            $this->links,
            $this->guardians
        );
    }

    public function testHooksBothSingleSiteAndNetworkDeletion(): void
    {
        Actions\expectAdded('delete_user')->once();
        Actions\expectAdded('wpmu_delete_user')->once();

        $this->cleanup->register();
    }

    public function testEachUpcomingLessonIsCancelledItsSlotFreedAndItsPendingPaymentVoided(): void
    {
        $this->bookings->shouldReceive('findUpcomingForStudent')->with(5)->andReturn([
            new Lesson(slotId: 7, studentId: 5, instructorId: 3, status: Lesson::STATUS_PENDING, paymentId: 40, id: 12),
            new Lesson(slotId: 8, studentId: 5, instructorId: 3, status: Lesson::STATUS_CONFIRMED, paymentId: null, id: 13),
        ]);
        $this->enrollments->shouldReceive('findByStudent')->with(5)->andReturn([]);

        $this->bookings->shouldReceive('updateStatus')->once()->with(12, Lesson::STATUS_CANCELLED)->andReturn(true);
        $this->bookings->shouldReceive('updateStatus')->once()->with(13, Lesson::STATUS_CANCELLED)->andReturn(true);

        // The point of the whole exercise: the times go back on sale.
        $this->availability->shouldReceive('release')->once()->with(7)->andReturn(true);
        $this->availability->shouldReceive('release')->once()->with(8)->andReturn(true);

        $this->payments->shouldReceive('voidPending')->once()->with(40);
        $this->payments->shouldReceive('voidPending')->once()->with(null);

        $this->cleanup->releaseBookings(5);
    }

    /**
     * A paid lesson is not credited back. The credit could only ever be spent on
     * the account being deleted, so writing one would be book-keeping nobody can
     * act on — a refund is the studio's call to make and record.
     */
    public function testNoCreditIsIssuedForAPaidLesson(): void
    {
        $this->bookings->shouldReceive('findUpcomingForStudent')->with(5)->andReturn([
            new Lesson(slotId: 7, studentId: 5, instructorId: 3, status: Lesson::STATUS_CONFIRMED, paymentId: 40, id: 12),
        ]);
        $this->enrollments->shouldReceive('findByStudent')->with(5)->andReturn([]);

        $this->bookings->shouldReceive('updateStatus')->andReturn(true);
        $this->availability->shouldReceive('release')->andReturn(true);
        $this->payments->shouldReceive('voidPending');

        $this->payments->shouldNotReceive('creditForCancelledLesson');

        $this->cleanup->releaseBookings(5);
    }

    public function testActiveEnrolmentsAreCancelledAndTheirPendingPaymentsVoided(): void
    {
        $this->bookings->shouldReceive('findUpcomingForStudent')->with(5)->andReturn([]);
        $this->enrollments->shouldReceive('findByStudent')->with(5)->andReturn([
            new Enrollment(offeringId: 8, studentId: 5, instructorId: 3, paymentId: 41, id: 40),
            new Enrollment(
                offeringId: 9,
                studentId: 5,
                instructorId: 3,
                status: Enrollment::STATUS_CANCELLED,
                paymentId: 42,
                id: 41,
            ),
        ]);

        // Only the active one: a withdrawn enrolment is already holding nothing.
        $this->enrollments->shouldReceive('updateStatus')->once()->with(40, Enrollment::STATUS_CANCELLED)->andReturn(true);
        $this->payments->shouldReceive('voidPending')->once()->with(41);

        $this->cleanup->releaseBookings(5);
    }

    /**
     * Past lessons happened and may have been paid for, so they stay exactly as
     * they are — `findUpcomingForStudent` is what draws that line.
     */
    public function testNothingHappensWhenTheAccountHasNothingBookedAhead(): void
    {
        $this->bookings->shouldReceive('findUpcomingForStudent')->with(5)->andReturn([]);
        $this->enrollments->shouldReceive('findByStudent')->with(5)->andReturn([]);

        $this->bookings->shouldNotReceive('updateStatus');
        $this->availability->shouldNotReceive('release');
        $this->enrollments->shouldNotReceive('updateStatus');

        $this->cleanup->releaseBookings(5);
    }

    public function testAnInvalidUserIdIsIgnored(): void
    {
        $this->bookings->shouldNotReceive('findUpcomingForStudent');
        $this->enrollments->shouldNotReceive('findByStudent');

        $this->cleanup->releaseBookings(0);
    }

    /**
     * A child account is login-less and exists only so its guardian has somebody
     * to book for. Without the guardian nobody can reach it, book for it, or be
     * billed for it — so it goes too, and what it was holding goes back.
     */
    public function testDeletingAGuardianReleasesAndDeletesEachChild(): void
    {
        $this->bookings->shouldReceive('findUpcomingForStudent')->with(5)->andReturn([]);
        $this->enrollments->shouldReceive('findByStudent')->with(5)->andReturn([]);

        $this->links->shouldReceive('findByGuardian')->with(5)->andReturn([
            new GuardianLink(guardianId: 5, studentId: 42, id: 1),
            new GuardianLink(guardianId: 5, studentId: 43, id: 2),
        ]);

        $this->bookings->shouldReceive('findUpcomingForStudent')->with(42)->andReturn([
            new Lesson(slotId: 7, studentId: 42, instructorId: 3, status: Lesson::STATUS_CONFIRMED, paymentId: 40, id: 12),
        ]);
        $this->bookings->shouldReceive('findUpcomingForStudent')->with(43)->andReturn([]);
        $this->enrollments->shouldReceive('findByStudent')->with(42)->andReturn([]);
        $this->enrollments->shouldReceive('findByStudent')->with(43)->andReturn([
            new Enrollment(offeringId: 8, studentId: 43, instructorId: 3, paymentId: 41, id: 40),
        ]);

        // The child's lesson is cancelled and its time freed, exactly as the
        // guardian's own would have been.
        $this->bookings->shouldReceive('updateStatus')->once()->with(12, Lesson::STATUS_CANCELLED)->andReturn(true);
        $this->availability->shouldReceive('release')->once()->with(7)->andReturn(true);
        $this->enrollments->shouldReceive('updateStatus')->once()->with(40, Enrollment::STATUS_CANCELLED)->andReturn(true);
        $this->payments->shouldReceive('voidPending')->with(40)->once();
        $this->payments->shouldReceive('voidPending')->with(41)->once();

        // Then the link row and the account itself.
        $this->links->shouldReceive('delete')->once()->with(5, 42)->andReturn(true);
        $this->links->shouldReceive('delete')->once()->with(5, 43)->andReturn(true);
        $this->guardians->shouldReceive('deleteUser')->once()->with(42);
        $this->guardians->shouldReceive('deleteUser')->once()->with(43);

        $this->cleanup->releaseBookings(5);
    }

    /**
     * Deleting a child fires `delete_user` again, which lands back in this same
     * handler. It must return without redoing the release — and a self-link,
     * however it got into the table, must not recurse for ever.
     */
    public function testAChildAlreadyDealtWithIsNotProcessedTwice(): void
    {
        $this->bookings->shouldReceive('findUpcomingForStudent')->with(5)->andReturn([]);
        $this->enrollments->shouldReceive('findByStudent')->with(5)->andReturn([]);

        $this->links->shouldReceive('findByGuardian')->with(5)->andReturn([
            new GuardianLink(guardianId: 5, studentId: 42, id: 1),
            // A duplicate row, and a self-link: neither may cause a second pass.
            new GuardianLink(guardianId: 5, studentId: 42, id: 2),
            new GuardianLink(guardianId: 5, studentId: 5, id: 3),
        ]);

        $this->bookings->shouldReceive('findUpcomingForStudent')->with(42)->once()->andReturn([]);
        $this->enrollments->shouldReceive('findByStudent')->with(42)->once()->andReturn([]);
        $this->links->shouldReceive('delete')->once()->with(5, 42)->andReturn(true);
        $this->guardians->shouldReceive('deleteUser')->once()->with(42);

        $this->cleanup->releaseBookings(5);

        // The re-entrant call the child's own deletion triggers is a no-op.
        $this->cleanup->releaseBookings(42);
    }

    /**
     * A child's own deletion (from the family screen, say) touches nothing but
     * that child — they have nobody linked beneath them.
     */
    public function testDeletingAStudentWithNoChildrenDeletesNobodyElse(): void
    {
        $this->bookings->shouldReceive('findUpcomingForStudent')->with(42)->andReturn([]);
        $this->enrollments->shouldReceive('findByStudent')->with(42)->andReturn([]);
        $this->links->shouldReceive('findByGuardian')->with(42)->andReturn([]);

        $this->guardians->shouldNotReceive('deleteUser');
        $this->links->shouldNotReceive('delete');

        $this->cleanup->releaseBookings(42);
    }
}