<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Booking;

use Brain\Monkey\Functions;
use Mockery;
use Unsupervised\Schedular\Booking\BookingPage;
use Unsupervised\Schedular\Guardian\GuardianService;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class BookingPageTest extends TestCase
{
    private BookingPage $page;
    private GuardianService&Mockery\MockInterface $guardians;

    protected function setUp(): void
    {
        parent::setUp();
        $this->guardians = Mockery::mock(GuardianService::class);
        // Most cases are a single-student account: one bookable person, no picker.
        $this->guardians->shouldReceive('bookableStudents')->andReturn(
            [['id' => 3, 'name' => 'Ada', 'is_self' => true]]
        )->byDefault();

        $this->page = new BookingPage($this->guardians);
    }

    /**
     * Renders the page as a logged-in, approved student — the path that
     * includes the template and its data attributes.
     *
     * @param array<int|string, mixed> $atts
     */
    private function renderForStudent(array $atts): string
    {
        Functions\when('is_user_logged_in')->justReturn(true);
        Functions\when('get_current_user_id')->justReturn(3);
        Functions\when('get_user_meta')->justReturn('');
        Functions\when('current_user_can')->justReturn(true);
        Functions\when('wp_enqueue_style')->justReturn(null);
        Functions\when('wp_enqueue_script')->justReturn(null);
        Functions\when('wp_create_nonce')->justReturn('nonce123');
        Functions\when('absint')->alias(static fn ($value) => abs((int) $value));

        return $this->page->render($atts);
    }

    public function testLoggedOutVisitorIsLinkedToTheWordPressLoginByDefault(): void
    {
        Functions\when('is_user_logged_in')->justReturn(false);
        Functions\when('get_permalink')->justReturn('https://example.com/book/');
        Functions\when('wp_login_url')->alias(
            static fn(string $redirect): string => 'https://example.com/wp-login.php?redirect_to=' . $redirect
        );

        $html = $this->page->render([]);

        self::assertStringContainsString(
            'href="https://example.com/wp-login.php?redirect_to=https://example.com/book/"',
            $html
        );
        self::assertStringContainsString('log in to book a lesson', $html);
    }

    public function testLoggedOutVisitorIsLinkedToTheChosenLoginPage(): void
    {
        Functions\when('is_user_logged_in')->justReturn(false);
        Functions\when('get_permalink')->alias(
            static fn(int $id = 0): string|false => 5 === $id ? 'https://example.com/login/' : false
        );
        Functions\expect('wp_login_url')->never();

        $html = $this->page->render(['loginPageId' => 5]);

        self::assertStringContainsString('href="https://example.com/login/"', $html);
    }

    public function testShortcodeStyleAttributeSelectsTheLoginPageToo(): void
    {
        Functions\when('is_user_logged_in')->justReturn(false);
        Functions\when('get_permalink')->alias(
            static fn(int $id = 0): string|false => 5 === $id ? 'https://example.com/login/' : false
        );

        $html = $this->page->render(['login_page_id' => '5']);

        self::assertStringContainsString('href="https://example.com/login/"', $html);
    }

    public function testDefaultEmbedShowsBothHalvesWithTheFilterAndNoPinnedType(): void
    {
        $html = $this->renderForStudent([]);

        self::assertStringContainsString('id="us-booking-app"', $html);
        self::assertStringContainsString('id="us-my-lessons"', $html);
        self::assertStringContainsString('id="us-slot-list"', $html);
        self::assertStringNotContainsString('data-lesson-type', $html);
        self::assertStringNotContainsString('data-type-filter', $html);
    }

    public function testBlockLessonTypeAttributePinsASingleType(): void
    {
        self::assertStringContainsString(
            'data-lesson-type="12"',
            $this->renderForStudent(['lessonTypeId' => 12])
        );
    }

    public function testShortcodeLessonTypeAttributePinsASingleType(): void
    {
        self::assertStringContainsString(
            'data-lesson-type="7"',
            $this->renderForStudent(['lesson_type' => '7'])
        );
    }

    public function testGarbageLessonTypeAttributeIsIgnored(): void
    {
        self::assertStringNotContainsString(
            'data-lesson-type',
            $this->renderForStudent(['lesson_type' => 'banana'])
        );
    }

    public function testFilterCanBeTurnedOffByBlockAndShortcodeAlike(): void
    {
        self::assertStringContainsString(
            'data-type-filter="0"',
            $this->renderForStudent(['showTypeFilter' => false])
        );

        // "no" is truthy to PHP, so the shortcode wording is matched explicitly.
        self::assertStringContainsString(
            'data-type-filter="0"',
            $this->renderForStudent(['show_filter' => 'no'])
        );

        self::assertStringNotContainsString(
            'data-type-filter',
            $this->renderForStudent(['show_filter' => 'yes'])
        );
    }

    public function testBookingOnlyEmbedLeavesOutTheUpcomingLessons(): void
    {
        $html = $this->renderForStudent(['displayMode' => 'booking']);

        self::assertStringContainsString('id="us-slot-list"', $html);
        self::assertStringNotContainsString('us-my-lessons', $html);
    }

    public function testUpcomingOnlyEmbedLeavesOutTheBookingCalendar(): void
    {
        $html = $this->renderForStudent(['show' => 'upcoming']);

        self::assertStringContainsString('id="us-my-lessons"', $html);
        self::assertStringNotContainsString('us-slot-list', $html);
        self::assertStringNotContainsString('us-booking-confirmation', $html);
    }

    public function testUnknownDisplayModeShowsTheWholePage(): void
    {
        $html = $this->renderForStudent(['displayMode' => 'sideways']);

        self::assertStringContainsString('id="us-my-lessons"', $html);
        self::assertStringContainsString('id="us-slot-list"', $html);
    }

    public function testLoginUrlFallsBackToWordPressLoginWhenThePageIsGone(): void
    {
        // The chosen page was deleted: get_permalink() returns false for it
        // and for the current (test) context alike.
        Functions\when('get_permalink')->justReturn(false);
        Functions\when('wp_login_url')->alias(
            static fn(string $redirect): string => '' === $redirect
                ? 'https://example.com/wp-login.php'
                : 'https://example.com/wp-login.php?redirect_to=' . $redirect
        );

        self::assertSame('https://example.com/wp-login.php', $this->page->loginUrl(5));
    }

    /**
     * A single-student account gets a one-entry list, which the script renders
     * as no picker at all.
     */
    public function testStudentListIsEmbeddedForTheScript(): void
    {
        $html = $this->renderForStudent([]);

        self::assertStringContainsString('data-students=', $html);
        self::assertStringContainsString('&quot;is_self&quot;:true', $html);
    }

    /**
     * Children lead the embedded list, so the picker's default selection is a
     * child rather than the parent.
     */
    public function testGuardianListLeadsWithChildren(): void
    {
        $this->guardians->shouldReceive('bookableStudents')->with(3)->andReturn([
            ['id' => 42, 'name' => 'Ada', 'is_self' => false],
            ['id' => 3, 'name' => 'Grace', 'is_self' => true],
        ]);

        $html = $this->renderForStudent([]);

        $students = json_decode(html_entity_decode((string) preg_replace('/.*data-students="([^"]*)".*/s', '$1', $html)), true);

        self::assertSame([42, 3], array_column((array) $students, 'id'));
        self::assertFalse($students[0]['is_self']);
    }
}