<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Guardian;

use Brain\Monkey\Functions;
use Mockery;
use Unsupervised\Schedular\Guardian\GuardianLink;
use Unsupervised\Schedular\Guardian\GuardianRepository;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class GuardianRepositoryTest extends TestCase
{
    private \wpdb $db;
    private GuardianRepository $repo;

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

        $this->db         = Mockery::mock(\wpdb::class);
        $this->db->prefix = 'wp_';
        $this->repo       = new GuardianRepository($this->db);

        $this->db->shouldReceive('prepare')->andReturnUsing(
            static fn (string $sql, ...$args): string => $sql . '|' . implode(',', $args)
        )->byDefault();
    }

    public function testInsertStoresTheLinkAndReturnsId(): void
    {
        Functions\expect('current_time')->with('mysql')->andReturn('2026-07-29 09:00:00');

        $this->db->shouldReceive('get_row')->once()->andReturn(null);
        $this->db->shouldReceive('insert')
            ->once()
            ->with(
                'wp_us_guardians',
                [
                    'guardian_id'  => 5,
                    'student_id'   => 42,
                    'relationship' => 'Parent',
                    'created_at'   => '2026-07-29 09:00:00',
                ],
                ['%d', '%d', '%s', '%s']
            );
        $this->db->insert_id = 7;

        self::assertSame(7, $this->repo->insert(new GuardianLink(5, 42, 'Parent')));
    }

    /**
     * v1 is one guardian per child. The check lives in the repository so every
     * caller — signup, the family screen, admin — gets it without repeating it.
     */
    public function testInsertRefusesAChildThatAlreadyHasAGuardian(): void
    {
        $this->db->shouldReceive('get_row')->once()->andReturn((object) [
            'id'           => 1,
            'guardian_id'  => 9,
            'student_id'   => 42,
            'relationship' => '',
            'created_at'   => '2026-07-01 09:00:00',
        ]);
        $this->db->shouldNotReceive('insert');

        self::assertSame(0, $this->repo->insert(new GuardianLink(5, 42)));
    }

    public function testFindByStudentReturnsNullWhenTheyBookForThemselves(): void
    {
        $this->db->shouldReceive('get_row')->once()->andReturn(null);

        self::assertNull($this->repo->findByStudent(42));
    }

    public function testFindByGuardianMapsEveryRow(): void
    {
        $this->db->shouldReceive('get_results')->once()->andReturn([
            (object) ['id' => 1, 'guardian_id' => 5, 'student_id' => 42, 'relationship' => '', 'created_at' => '2026-07-01 09:00:00'],
            (object) ['id' => 2, 'guardian_id' => 5, 'student_id' => 43, 'relationship' => '', 'created_at' => '2026-07-02 09:00:00'],
        ]);

        $links = $this->repo->findByGuardian(5);

        self::assertCount(2, $links);
        self::assertSame([42, 43], array_map(static fn (GuardianLink $l): int => $l->studentId, $links));
    }

    public function testFindByGuardianReturnsAnEmptyListWhenTheQueryReturnsNull(): void
    {
        $this->db->shouldReceive('get_results')->once()->andReturn(null);

        self::assertSame([], $this->repo->findByGuardian(5));
    }

    public function testIsGuardianOfIsTrueOnlyForALinkedPair(): void
    {
        $this->db->shouldReceive('get_var')->once()->andReturn('1');
        self::assertTrue($this->repo->isGuardianOf(5, 42));

        $this->db->shouldReceive('get_var')->once()->andReturn(null);
        self::assertFalse($this->repo->isGuardianOf(5, 99));
    }

    public function testDeleteReportsWhetherARowWasRemoved(): void
    {
        $this->db->shouldReceive('delete')
            ->once()
            ->with('wp_us_guardians', ['guardian_id' => 5, 'student_id' => 42], ['%d', '%d'])
            ->andReturn(1);

        self::assertTrue($this->repo->delete(5, 42));

        $this->db->shouldReceive('delete')->once()->andReturn(0);

        self::assertFalse($this->repo->delete(5, 99));
    }

    public function testCountChildrenReturnsAnInt(): void
    {
        $this->db->shouldReceive('get_var')->once()->andReturn('2');

        self::assertSame(2, $this->repo->countChildren(5));
    }
}