<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Auth;

use Brain\Monkey\Functions;
use Unsupervised\Schedular\Auth\InstructorNotificationPref;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class InstructorNotificationPrefTest extends TestCase
{
    public function testDefaultsOffWhenTheMetaIsUnset(): void
    {
        // Absent meta reads as an empty string, which is not the opt-in value.
        Functions\when('get_user_meta')->justReturn('');

        self::assertFalse((new InstructorNotificationPref())->wants(7));
    }

    public function testReadsAStoredOptIn(): void
    {
        Functions\when('get_user_meta')->alias(
            static fn (int $id, string $key): string => 7 === $id && InstructorNotificationPref::META_NOTIFY === $key ? '1' : ''
        );

        self::assertTrue((new InstructorNotificationPref())->wants(7));
    }

    public function testAStoredNoReadsAsOff(): void
    {
        Functions\when('get_user_meta')->justReturn('0');

        self::assertFalse((new InstructorNotificationPref())->wants(7));
    }

    public function testNobodyWantsNothing(): void
    {
        // A zero id is not a user; it must never read as opted-in.
        Functions\expect('get_user_meta')->never();

        self::assertFalse((new InstructorNotificationPref())->wants(0));
    }

    public function testSetStoresTheChoiceAsAStringBoolean(): void
    {
        Functions\expect('update_user_meta')->once()->with(7, InstructorNotificationPref::META_NOTIFY, '1')->andReturn(true);

        (new InstructorNotificationPref())->set(7, true);
    }

    public function testSetStoresADeliberateNoRatherThanDeleting(): void
    {
        Functions\expect('update_user_meta')->once()->with(7, InstructorNotificationPref::META_NOTIFY, '0')->andReturn(true);

        (new InstructorNotificationPref())->set(7, false);
    }

    public function testSetIgnoresANonUser(): void
    {
        Functions\expect('update_user_meta')->never();

        (new InstructorNotificationPref())->set(0, true);
    }
}