<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Booking;

use Brain\Monkey\Functions;
use Mockery;
use Unsupervised\Schedular\Auth\RoleManager;
use Unsupervised\Schedular\Availability\AvailabilityRepository;
use Unsupervised\Schedular\Availability\AvailabilitySlot;
use Unsupervised\Schedular\Booking\AdminBooking;
use Unsupervised\Schedular\Booking\BookingRepository;
use Unsupervised\Schedular\Booking\Lesson;
use Unsupervised\Schedular\Booking\LessonBooker;
use Unsupervised\Schedular\Guardian\GuardianService;
use Unsupervised\Schedular\Offering\Offering;
use Unsupervised\Schedular\Offering\OfferingRepository;
use Unsupervised\Schedular\Payment\Payment;
use Unsupervised\Schedular\Payment\PaymentService;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class AdminBookingTest extends TestCase
{
    private AvailabilityRepository&Mockery\MockInterface $availability;
    private BookingRepository&Mockery\MockInterface $bookings;
    private OfferingRepository&Mockery\MockInterface $offerings;
    private PaymentService&Mockery\MockInterface $payments;
    private GuardianService&Mockery\MockInterface $guardians;
    private AdminBooking $admin;

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

        Functions\when('absint')->alias(static fn ($v): int => abs((int) $v));
        Functions\when('current_time')->justReturn('2026-06-01 10:00:00');
        Functions\when('mysql2date')->alias(
            static fn (string $format, string $date): string => date($format, (int) strtotime($date))
        );
        // The picker offers holders of the student role, and that is what the guard
        // accepts; it is exercised on its own below.
        Functions\when('get_userdata')->alias(fn (int $id): \WP_User => $this->user($id, 'Jane Doe'));
        Functions\when('get_users')->justReturn([]);
        // The staff member doing the booking; stamped on the lesson as booked_by.
        Functions\when('get_current_user_id')->justReturn(3);

        $this->availability = Mockery::mock(AvailabilityRepository::class);
        $this->bookings     = Mockery::mock(BookingRepository::class);
        $this->offerings    = Mockery::mock(OfferingRepository::class);
        $this->payments     = Mockery::mock(PaymentService::class);
        $this->guardians    = Mockery::mock(GuardianService::class);
        $this->guardians->shouldReceive('payerFor')->andReturnUsing(static fn (int $id): int => $id)->byDefault();

        // The real booker over mocked repositories: an admin booking must go
        // through exactly the machinery a student's own booking does.
        $this->admin = new AdminBooking(
            $this->availability,
            $this->offerings,
            new LessonBooker($this->availability, $this->bookings, $this->offerings, $this->payments, $this->guardians)
        );
    }

    public function testBooksASingleLessonAndRaisesAPendingPayment(): void
    {
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot());
        $this->offerings->shouldReceive('findById')->with(3)->andReturn($this->offering());
        $this->availability->shouldReceive('claim')->once()->with(7)->andReturn(true);

        $this->bookings->shouldReceive('insert')->once()->with(Mockery::on(
            static fn (Lesson $l): bool => 7 === $l->slotId
                && 42 === $l->studentId
                && 9 === $l->instructorId
                && 3 === $l->offeringId
                && Lesson::RECURRENCE_SINGLE === $l->recurrence
                && 'Booked by phone' === $l->notes
                // Stamped with who booked it, which is what later lets the studio
                // record the intake it never had a chance to collect.
                && 3 === $l->bookedBy
        ))->andReturn(100);

        $this->payments->shouldReceive('createForRegistration')
            ->once()
            ->with(Payment::REG_LESSON, 100, 42, 9, 40.0, 'CAD', null, null, null, 42)
            ->andReturn($this->pendingPayment());

        $notice = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_SINGLE, false, 'Booked by phone');

        self::assertIsString($notice);
        self::assertStringContainsString('30 min piano', $notice);
        self::assertStringContainsString('Jul 1, 2026 10:00 AM', $notice);
        self::assertStringContainsString('pending payment', $notice);
    }

    public function testNoChargeSkipsThePaymentAndConfirmsTheLesson(): void
    {
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot());
        $this->offerings->shouldReceive('findById')->with(3)->andReturn($this->offering());
        $this->availability->shouldReceive('claim')->once()->with(7)->andReturn(true);
        $this->bookings->shouldReceive('insert')->once()->andReturn(100);

        // The whole point of the no-charge tick: a priced offering raises nothing.
        $this->payments->shouldReceive('createForRegistration')->never();
        $this->bookings->shouldReceive('updateStatus')->once()->with(100, Lesson::STATUS_CONFIRMED)->andReturn(true);

        $notice = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_SINGLE, true, '');

        self::assertIsString($notice);
        self::assertStringContainsString('Nothing is owed', $notice);
    }

    public function testWeeklyReservesEveryRemainingOccurrenceAndBillsForAllOfThem(): void
    {
        $slot = $this->slot(recurrenceGroup: 55);

        $this->availability->shouldReceive('findById')->with(7)->andReturn($slot);
        $this->offerings->shouldReceive('findById')->with(3)->andReturn($this->offering());
        $this->availability->shouldReceive('findUnbookedInGroup')->once()->with(55)->andReturn([
            $slot,
            $this->slot(id: 8, startDt: '2026-07-08 10:00:00', recurrenceGroup: 55),
            $this->slot(id: 9, startDt: '2026-07-15 10:00:00', recurrenceGroup: 55),
        ]);
        $this->availability->shouldReceive('claim')->times(3)->andReturn(true);
        $this->bookings->shouldReceive('insertSeries')->once()
            ->with(Mockery::type(Lesson::class), [7, 8, 9])
            ->andReturn([100, 101, 102]);

        // A per-lesson (one_time) price is owed once per occurrence claimed.
        $this->payments->shouldReceive('createForRegistration')
            ->once()
            ->with(Payment::REG_LESSON, 100, 42, 9, 120.0, 'CAD', null, null, null, 42)
            ->andReturn($this->pendingPayment());

        $notice = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_WEEKLY, false, '');

        self::assertIsString($notice);
        self::assertStringContainsString('3 weekly lessons', $notice);
    }

    public function testWeeklyIsRefusedOnATimeThatDoesNotRepeat(): void
    {
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot());
        $this->offerings->shouldReceive('findById')->with(3)->andReturn($this->offering());

        // Nothing is claimed or written: the staff member asked for a term and is
        // told they cannot have one, rather than silently getting one lesson.
        $this->availability->shouldReceive('claim')->never();
        $this->bookings->shouldReceive('insert')->never();
        $this->bookings->shouldReceive('insertSeries')->never();

        $result = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_WEEKLY, false, '');

        self::assertInstanceOf(\WP_Error::class, $result);
        self::assertSame('not_weekly', $result->get_error_code());
    }

    public function testInstructorScopeRefusesAnotherInstructorsTime(): void
    {
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot());
        $this->availability->shouldReceive('claim')->never();

        // Slot belongs to instructor 9; My Lessons is scoped to instructor 4.
        $result = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_SINGLE, false, '', 4);

        self::assertInstanceOf(\WP_Error::class, $result);
        self::assertSame('invalid_slot', $result->get_error_code());
    }

    public function testAnAlreadyBookedTimeIsRefused(): void
    {
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot(isBooked: true));
        $this->availability->shouldReceive('claim')->never();

        $result = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_SINGLE, false, '');

        self::assertInstanceOf(\WP_Error::class, $result);
        self::assertSame('slot_taken', $result->get_error_code());
    }

    public function testSomeoneWhoIsNotAStudentIsRefused(): void
    {
        Functions\when('get_userdata')->alias(fn (int $id): \WP_User => $this->user($id, 'Jane Doe', [RoleManager::INSTRUCTOR]));
        $this->availability->shouldReceive('findById')->never();

        $result = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_SINGLE, false, '');

        self::assertInstanceOf(\WP_Error::class, $result);
        self::assertSame('invalid_student', $result->get_error_code());
    }

    public function testAnAccountThatNoLongerExistsIsRefused(): void
    {
        Functions\when('get_userdata')->justReturn(false);
        $this->availability->shouldReceive('findById')->never();

        $result = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_SINGLE, false, '');

        self::assertInstanceOf(\WP_Error::class, $result);
        self::assertSame('invalid_student', $result->get_error_code());
    }

    public function testNoStudentChosenIsRefusedWithoutLookingAnyoneUp(): void
    {
        Functions\expect('get_userdata')->never();
        $this->availability->shouldReceive('findById')->never();

        $result = $this->admin->book(0, 7, 3, Lesson::RECURRENCE_SINGLE, false, '');

        self::assertInstanceOf(\WP_Error::class, $result);
        self::assertSame('invalid_student', $result->get_error_code());
    }

    /**
     * A child holds the student role but never `book_lesson` — withheld so the
     * account cannot book in its own name. The studio booking for them is the only
     * route a child has to a lesson, so it must not be blocked by that.
     */
    public function testBooksForAGuardiansChildWhoCannotBookThemselves(): void
    {
        Functions\when('user_can')->justReturn(false);
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot());
        $this->offerings->shouldReceive('findById')->with(3)->andReturn($this->offering());
        $this->availability->shouldReceive('claim')->once()->with(7)->andReturn(true);
        $this->bookings->shouldReceive('insert')->once()->andReturn(100);
        $this->payments->shouldReceive('createForRegistration')->once()->andReturn($this->pendingPayment());

        $notice = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_SINGLE, false, '');

        self::assertIsString($notice);
        self::assertStringContainsString('30 min piano', $notice);
    }

    /**
     * Same for a self-signup the studio has not approved yet: the front desk can
     * still get them onto the calendar while the paperwork catches up.
     */
    public function testBooksForAStudentStillAwaitingApproval(): void
    {
        Functions\when('user_can')->justReturn(false);
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot());
        $this->offerings->shouldReceive('findById')->with(3)->andReturn($this->offering());
        $this->availability->shouldReceive('claim')->once()->with(7)->andReturn(true);
        $this->bookings->shouldReceive('insert')->once()->with(Mockery::on(
            static fn (Lesson $l): bool => 42 === $l->studentId
        ))->andReturn(100);
        $this->payments->shouldReceive('createForRegistration')->once()->andReturn($this->pendingPayment());

        $notice = $this->admin->book(42, 7, 3, Lesson::RECURRENCE_SINGLE, false, '');

        self::assertIsString($notice);
        self::assertStringContainsString('pending payment', $notice);
    }

    public function testATiedTimeCannotBeBookedAsADifferentLessonType(): void
    {
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot(offeringId: 3));
        $this->availability->shouldReceive('claim')->never();

        $result = $this->admin->book(42, 7, 4, Lesson::RECURRENCE_SINGLE, false, '');

        self::assertInstanceOf(\WP_Error::class, $result);
        self::assertSame('offering_mismatch', $result->get_error_code());
    }

    public function testATiedTimeBooksAsItsOwnLessonTypeWhenNoneIsChosen(): void
    {
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot(offeringId: 3));
        $this->offerings->shouldReceive('findById')->with(3)->andReturn($this->offering());
        $this->availability->shouldReceive('claim')->once()->with(7)->andReturn(true);
        $this->bookings->shouldReceive('insert')->once()->with(Mockery::on(
            static fn (Lesson $l): bool => 3 === $l->offeringId
        ))->andReturn(100);
        $this->payments->shouldReceive('createForRegistration')->once()->andReturn($this->pendingPayment());

        self::assertIsString($this->admin->book(42, 7, 0, Lesson::RECURRENCE_SINGLE, false, ''));
    }

    public function testAGeneralTimeNeedsALessonTypeChosen(): void
    {
        $this->availability->shouldReceive('findById')->with(7)->andReturn($this->slot());
        $this->availability->shouldReceive('claim')->never();

        $result = $this->admin->book(42, 7, 0, Lesson::RECURRENCE_SINGLE, false, '');

        self::assertInstanceOf(\WP_Error::class, $result);
        self::assertSame('offering_required', $result->get_error_code());
    }

    public function testFormDataScopesTimesAndTypesToOneInstructorAndLeavesTheirNameOff(): void
    {
        $this->availability->shouldReceive('findAvailable')
            ->once()
            ->with(9, 0, 0, '', '2026-07-27 10:00:00')
            ->andReturn([$this->slot(recurrenceGroup: 55)]);
        $this->offerings->shouldReceive('findAll')
            ->once()
            ->with(9, Offering::KIND_PRIVATE_LESSON, true)
            ->andReturn([$this->offering()]);

        $data = $this->admin->formData(9);

        self::assertSame([['id' => 3, 'label' => '30 min piano (30 min)']], $data['offerings']);
        self::assertSame(1, count($data['slots']));
        self::assertTrue($data['slots'][0]['weekly']);
        self::assertStringContainsString('Wed Jul 1, 2026 10:00 AM (30 min)', $data['slots'][0]['label']);
        self::assertStringContainsString('repeats weekly', $data['slots'][0]['label']);
    }

    public function testStudioWideFormDataNamesTheInstructorAndTheTimesTiedLessonType(): void
    {
        $this->availability->shouldReceive('findAvailable')->once()->andReturn([$this->slot(offeringId: 3)]);
        $this->offerings->shouldReceive('findAll')->once()->with(0, Offering::KIND_PRIVATE_LESSON, true)->andReturn([]);
        $this->offerings->shouldReceive('findById')->with(3)->andReturn($this->offering());
        Functions\when('get_userdata')->justReturn($this->user(9, 'Jane Doe'));

        $data = $this->admin->formData(0);

        self::assertStringContainsString('Jane Doe', $data['slots'][0]['label']);
        self::assertStringContainsString('30 min piano', $data['slots'][0]['label']);
    }

    private function slot(
        int $id = 7,
        string $startDt = '2026-07-01 10:00:00',
        bool $isBooked = false,
        ?int $offeringId = null,
        ?int $recurrenceGroup = null
    ): AvailabilitySlot {
        return new AvailabilitySlot(
            instructorId: 9,
            startDt: $startDt,
            endDt: date('Y-m-d H:i:s', (int) strtotime($startDt) + 1800),
            durationMinutes: 30,
            offeringId: $offeringId,
            isBooked: $isBooked,
            recurrenceGroup: $recurrenceGroup,
            id: $id,
        );
    }

    private function offering(): Offering
    {
        return new Offering(
            instructorId: 9,
            kind: Offering::KIND_PRIVATE_LESSON,
            title: '30 min piano',
            price: 40.0,
            durationMinutes: 30,
            isActive: true,
            id: 3,
        );
    }

    private function pendingPayment(): Payment
    {
        return new Payment(
            studentId: 42,
            instructorId: 9,
            registrationType: Payment::REG_LESSON,
            registrationId: 100,
            amount: 40.0,
            status: Payment::STATUS_PENDING,
            id: 500,
        );
    }

    /** @param list<string> $roles */
    private function user(int $id, string $name, array $roles = [RoleManager::STUDENT]): \WP_User
    {
        $user               = Mockery::mock(\WP_User::class);
        $user->ID           = $id;
        $user->roles        = $roles;
        $user->first_name   = '';
        $user->last_name    = '';
        $user->nickname     = $name;
        $user->display_name = $name;
        $user->user_login   = 'jane';
        $user->user_email   = 'jane@example.test';

        return $user;
    }
}