<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit;

use Brain\Monkey\Actions;
use Brain\Monkey\Functions;
use Mockery;
use Unsupervised\Schedular\Auth\LoginPage;
use Unsupervised\Schedular\Auth\RegistrationPage;
use Unsupervised\Schedular\BlockRegistrar;
use Unsupervised\Schedular\Booking\BookingPage;
use Unsupervised\Schedular\GroupClass\GroupClassPage;

/**
 * Test double exposing editor-preview mode as a switch (the real detection
 * relies on the REST_REQUEST constant, which cannot be toggled within a
 * single PHP process) and recording redirects instead of exiting.
 */
class TestableBlockRegistrar extends BlockRegistrar
{
    public bool $preview = false;

    /** @var list<string> */
    public array $redirects = [];

    protected function isEditorPreview(): bool
    {
        return $this->preview;
    }

    protected function redirect(string $url): void
    {
        $this->redirects[] = $url;
    }
}

class BlockRegistrarTest extends TestCase
{
    private BookingPage&Mockery\MockInterface $bookingPage;
    private LoginPage&Mockery\MockInterface $loginPage;
    private RegistrationPage&Mockery\MockInterface $registrationPage;
    private GroupClassPage&Mockery\MockInterface $groupClassPage;
    private TestableBlockRegistrar $registrar;

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

        $this->bookingPage      = Mockery::mock(BookingPage::class);
        $this->loginPage        = Mockery::mock(LoginPage::class);
        $this->registrationPage = Mockery::mock(RegistrationPage::class);
        $this->groupClassPage   = Mockery::mock(GroupClassPage::class);

        $this->registrar = new TestableBlockRegistrar(
            $this->bookingPage,
            $this->loginPage,
            $this->registrationPage,
            $this->groupClassPage,
        );
    }

    public function testRegisterHooksBlockRegistrationAndAutoRedirect(): void
    {
        Actions\expectAdded('init')->once()->with([$this->registrar, 'registerBlocks']);
        Actions\expectAdded('template_redirect')->once()->with([$this->registrar, 'maybeAutoRedirect']);

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

    public function testRegisterBlocksRegistersAllFourBlocksWithAssets(): void
    {
        Functions\expect('wp_register_script')
            ->once()
            ->with(
                BlockRegistrar::SCRIPT_HANDLE,
                Mockery::pattern('~assets/js/blocks\.js$~'),
                Mockery::type('array'),
                USC_VERSION,
                true
            );
        Functions\when('wp_style_is')->justReturn(false);
        Functions\expect('wp_register_style')
            ->once()
            ->with(
                BlockRegistrar::STYLE_HANDLE,
                Mockery::pattern('~assets/css/frontend\.css$~'),
                [],
                USC_VERSION
            );

        $registered = [];
        Functions\when('register_block_type')->alias(
            static function (string $name, array $args) use (&$registered): bool {
                $registered[$name] = $args;
                return true;
            }
        );

        $this->registrar->registerBlocks();

        self::assertSame(
            [
                'us-scheduler/booking',
                'us-scheduler/student-login',
                'us-scheduler/student-register',
                'us-scheduler/group-classes',
            ],
            array_keys($registered)
        );

        foreach ($registered as $args) {
            self::assertSame(BlockRegistrar::SCRIPT_HANDLE, $args['editor_script']);
            self::assertSame(BlockRegistrar::STYLE_HANDLE, $args['style']);
            self::assertIsCallable($args['render_callback']);
        }

        // The link-target and auto-redirect options must be declared
        // server-side or the block-renderer preview rejects them.
        self::assertSame(
            ['loginPageId', 'autoRedirect'],
            array_keys($registered['us-scheduler/booking']['attributes'])
        );
        self::assertSame(
            ['bookingPageId', 'autoRedirect'],
            array_keys($registered['us-scheduler/student-login']['attributes'])
        );
        self::assertSame([], $registered['us-scheduler/student-register']['attributes']);
        self::assertSame([], $registered['us-scheduler/group-classes']['attributes']);
    }

    public function testRegisterBlocksDoesNotReRegisterAnAlreadyRegisteredStyle(): void
    {
        Functions\when('wp_register_script')->justReturn(true);
        Functions\when('wp_style_is')->justReturn(true);
        Functions\expect('wp_register_style')->never();
        Functions\when('register_block_type')->justReturn(true);

        $this->registrar->registerBlocks();
    }

    public function testFrontEndRenderDelegatesToThePageObjectsPassingAttributes(): void
    {
        $this->registrar->preview = false;

        $this->bookingPage->shouldReceive('render')
            ->once()->with(['loginPageId' => 5])->andReturn('booking-html');
        $this->loginPage->shouldReceive('render')
            ->once()->with(['bookingPageId' => 9])->andReturn('login-html');
        $this->registrationPage->shouldReceive('render')->once()->with([])->andReturn('register-html');
        $this->groupClassPage->shouldReceive('render')->once()->with([])->andReturn('group-html');

        self::assertSame('booking-html', $this->registrar->renderBooking(['loginPageId' => 5]));
        self::assertSame('login-html', $this->registrar->renderLogin(['bookingPageId' => 9]));
        self::assertSame('register-html', $this->registrar->renderRegistration());
        self::assertSame('group-html', $this->registrar->renderGroupClasses());
    }

    public function testEditorPreviewRendersStaticMarkupWithoutTouchingThePages(): void
    {
        $this->registrar->preview = true;

        Functions\when('wp_nonce_field')->justReturn('');

        $this->bookingPage->shouldNotReceive('render');
        $this->loginPage->shouldNotReceive('render');
        $this->registrationPage->shouldNotReceive('render');
        $this->groupClassPage->shouldNotReceive('render');

        self::assertStringContainsString('us-booking-app', $this->registrar->renderBooking());
        self::assertStringContainsString('us-login-form', $this->registrar->renderLogin());
        self::assertStringContainsString('us-register-form', $this->registrar->renderRegistration());
        self::assertStringContainsString('us-group-app', $this->registrar->renderGroupClasses());
    }

    public function testIsEditorPreviewIsFalseOutsideRestRequests(): void
    {
        // REST_REQUEST is undefined in the test process, so the real
        // registrar must take the front-end path.
        $registrar = new BlockRegistrar(
            $this->bookingPage,
            $this->loginPage,
            $this->registrationPage,
            $this->groupClassPage,
        );

        $this->bookingPage->shouldReceive('render')->once()->with([])->andReturn('live');

        self::assertSame('live', $registrar->renderBooking());
    }

    /**
     * Stubs the front-end request context for maybeAutoRedirect: a singular
     * page whose content parses to the given blocks.
     *
     * @param list<array<string, mixed>> $parsedBlocks
     */
    private function stubSingularRequest(int $postId, array $parsedBlocks, bool $loggedIn): void
    {
        $post               = new \WP_Post();
        $post->ID           = $postId;
        $post->post_content = 'serialized-block-content';

        Functions\when('is_admin')->justReturn(false);
        Functions\when('is_singular')->justReturn(true);
        Functions\when('get_post')->justReturn($post);
        Functions\when('is_user_logged_in')->justReturn($loggedIn);
        Functions\when('has_block')->alias(
            static function (string $blockName) use ($parsedBlocks): bool {
                foreach ($parsedBlocks as $block) {
                    if (($block['blockName'] ?? null) === $blockName) {
                        return true;
                    }
                    foreach ((array) ($block['innerBlocks'] ?? []) as $inner) {
                        if (is_array($inner) && ($inner['blockName'] ?? null) === $blockName) {
                            return true;
                        }
                    }
                }
                return false;
            }
        );
        Functions\when('parse_blocks')->justReturn($parsedBlocks);
    }

    public function testAutoRedirectSendsLoggedOutVisitorToTheLoginPage(): void
    {
        $this->stubSingularRequest(
            10,
            [
                [
                    'blockName'   => 'us-scheduler/booking',
                    'attrs'       => ['autoRedirect' => true, 'loginPageId' => 7],
                    'innerBlocks' => [],
                ],
            ],
            false
        );

        $this->bookingPage->shouldReceive('loginUrl')->once()->with(7)->andReturn('https://example.com/login/');

        $this->registrar->maybeAutoRedirect();

        self::assertSame(['https://example.com/login/'], $this->registrar->redirects);
    }

    public function testAutoRedirectFindsTheBookingBlockNestedInsideAnotherBlock(): void
    {
        $this->stubSingularRequest(
            10,
            [
                [
                    'blockName'   => 'core/group',
                    'attrs'       => [],
                    'innerBlocks' => [
                        [
                            'blockName'   => 'us-scheduler/booking',
                            'attrs'       => ['autoRedirect' => true],
                            'innerBlocks' => [],
                        ],
                    ],
                ],
            ],
            false
        );

        // loginPageId omitted from the serialized block (defaults are not
        // stored) — falls back to the WordPress login screen.
        $this->bookingPage->shouldReceive('loginUrl')->once()->with(0)->andReturn('https://example.com/wp-login.php');

        $this->registrar->maybeAutoRedirect();

        self::assertSame(['https://example.com/wp-login.php'], $this->registrar->redirects);
    }

    public function testNoRedirectWhenTheBookingBlockDoesNotOptIn(): void
    {
        $this->stubSingularRequest(
            10,
            [
                [
                    'blockName'   => 'us-scheduler/booking',
                    'attrs'       => ['loginPageId' => 7],
                    'innerBlocks' => [],
                ],
            ],
            false
        );

        $this->bookingPage->shouldNotReceive('loginUrl');

        $this->registrar->maybeAutoRedirect();

        self::assertSame([], $this->registrar->redirects);
    }

    public function testNoRedirectWhenTheBookingBlockPointsAtItsOwnPage(): void
    {
        $this->stubSingularRequest(
            7,
            [
                [
                    'blockName'   => 'us-scheduler/booking',
                    'attrs'       => ['autoRedirect' => true, 'loginPageId' => 7],
                    'innerBlocks' => [],
                ],
            ],
            false
        );

        $this->bookingPage->shouldNotReceive('loginUrl');

        $this->registrar->maybeAutoRedirect();

        self::assertSame([], $this->registrar->redirects);
    }

    public function testAutoRedirectSendsLoggedInVisitorToTheBookingPage(): void
    {
        $this->stubSingularRequest(
            20,
            [
                [
                    'blockName'   => 'us-scheduler/student-login',
                    'attrs'       => ['autoRedirect' => true, 'bookingPageId' => 9],
                    'innerBlocks' => [],
                ],
            ],
            true
        );

        $this->loginPage->shouldReceive('bookingUrl')->once()->with(9)->andReturn('https://example.com/book/');

        $this->registrar->maybeAutoRedirect();

        self::assertSame(['https://example.com/book/'], $this->registrar->redirects);
    }

    public function testNoRedirectWhenTheLoginBlockHasNoBookingPageChosen(): void
    {
        $this->stubSingularRequest(
            20,
            [
                [
                    'blockName'   => 'us-scheduler/student-login',
                    'attrs'       => ['autoRedirect' => true],
                    'innerBlocks' => [],
                ],
            ],
            true
        );

        $this->loginPage->shouldReceive('bookingUrl')->once()->with(0)->andReturnNull();

        $this->registrar->maybeAutoRedirect();

        self::assertSame([], $this->registrar->redirects);
    }

    public function testNoRedirectForLoggedInVisitorOnTheBookingPage(): void
    {
        $this->stubSingularRequest(
            10,
            [
                [
                    'blockName'   => 'us-scheduler/booking',
                    'attrs'       => ['autoRedirect' => true, 'loginPageId' => 7],
                    'innerBlocks' => [],
                ],
            ],
            true
        );

        $this->bookingPage->shouldNotReceive('loginUrl');

        $this->registrar->maybeAutoRedirect();

        self::assertSame([], $this->registrar->redirects);
    }

    public function testNoRedirectOutsideSingularFrontEndRequests(): void
    {
        Functions\when('is_admin')->justReturn(false);
        Functions\when('is_singular')->justReturn(false);

        $this->registrar->maybeAutoRedirect();

        self::assertSame([], $this->registrar->redirects);
    }
}