<?php
declare(strict_types=1);

namespace WPMultiCity\Tests;

use WPMultiCity\LinkFilter;

final class LinkFilterTest extends TestCase
{
    public function test_register_attaches_home_url_filter_at_9999(): void
    {
        LinkFilter::register();

        self::assertSame(
            9999,
            has_filter('home_url', [LinkFilter::class, 'filter_home_url']),
            'LinkFilter::register() must hook home_url at priority 9999'
        );
    }

    public function test_register_attaches_post_link_filter_at_10(): void
    {
        LinkFilter::register();

        self::assertSame(
            10,
            has_filter('post_link', [LinkFilter::class, 'filter_post_link']),
            'LinkFilter::register() must hook post_link at priority 10'
        );
    }

    public function test_register_attaches_acf_load_value_filter_at_9999(): void
    {
        LinkFilter::register();

        self::assertSame(
            9999,
            has_filter('acf/load_value', [LinkFilter::class, 'filter_acf_load_value']),
            'LinkFilter::register() must hook acf/load_value at priority 9999'
        );
    }

    private function set_routing_context(string $town_slug = 'tyumen', string $main = 'spb', string $host = 'site.com'): void
    {
        $_SERVER['REQUEST_URI'] = '/' . $town_slug . '/';
        $_SERVER['HTTP_HOST'] = $host;
        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => $town_slug]);
        \Brain\Monkey\Functions\when('get_field')->alias(function ($name) use ($main) {
            if ($name === 'main_town_slug') return $main;
            return false;  // page_no_rep empty, page_unic empty
        });
    }

    public function test_add_town_prefix_no_change_when_current_town_equals_main(): void
    {
        $this->set_routing_context('spb', 'spb');

        self::assertSame('/about/', LinkFilter::add_town_prefix('/about/'));
    }

    public function test_add_town_prefix_no_change_when_current_town_is_null(): void
    {
        $_SERVER['REQUEST_URI'] = '/random/';
        $_SERVER['HTTP_HOST'] = 'site.com';
        \Brain\Monkey\Functions\when('get_terms')->justReturn([10 => 'spb']);
        \Brain\Monkey\Functions\when('get_field')->justReturn(false);

        self::assertSame('/about/', LinkFilter::add_town_prefix('/about/'));
    }

    public function test_add_town_prefix_prepends_town_to_path_only_url(): void
    {
        $this->set_routing_context();

        self::assertSame('/tyumen/about/', LinkFilter::add_town_prefix('/about/'));
    }

    public function test_add_town_prefix_skips_path_already_prefixed(): void
    {
        $this->set_routing_context();

        self::assertSame('/tyumen/about/', LinkFilter::add_town_prefix('/tyumen/about/'));
        self::assertSame('/tyumen', LinkFilter::add_town_prefix('/tyumen'));
    }

    public function test_add_town_prefix_full_url_same_host(): void
    {
        $this->set_routing_context();

        self::assertSame(
            'https://site.com/tyumen/about/',
            LinkFilter::add_town_prefix('https://site.com/about/')
        );
        self::assertSame(
            'https://site.com/tyumen/',
            LinkFilter::add_town_prefix('https://site.com/')
        );
    }

    public function test_add_town_prefix_full_url_already_prefixed_no_double_prefix(): void
    {
        $this->set_routing_context();

        self::assertSame(
            'https://site.com/tyumen/about/',
            LinkFilter::add_town_prefix('https://site.com/tyumen/about/')
        );
    }

    public function test_add_town_prefix_external_host_no_change(): void
    {
        $this->set_routing_context();

        self::assertSame(
            'https://external.com/foo/',
            LinkFilter::add_town_prefix('https://external.com/foo/')
        );
    }

    public function test_add_town_prefix_non_http_scheme_no_change(): void
    {
        $this->set_routing_context();

        self::assertSame('mailto:x@y.com', LinkFilter::add_town_prefix('mailto:x@y.com'));
        self::assertSame('tel:+79991234567', LinkFilter::add_town_prefix('tel:+79991234567'));
    }

    public function test_add_town_prefix_respects_page_no_rep_exclusions(): void
    {
        $_SERVER['REQUEST_URI'] = '/tyumen/';
        $_SERVER['HTTP_HOST'] = 'site.com';
        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => 'tyumen']);
        \Brain\Monkey\Functions\when('get_field')->alias(function ($name) {
            if ($name === 'main_town_slug') return 'spb';
            if ($name === 'page_no_rep') return [['link' => '/privacy/']];
            return false;
        });

        self::assertSame('/privacy/', LinkFilter::add_town_prefix('/privacy/'));
    }

    public function test_add_town_prefix_returns_unchanged_when_bypassed(): void
    {
        $this->set_routing_context();

        $result = \WPMultiCity\Helpers::without_url_filters(function () {
            return LinkFilter::add_town_prefix('/about/');
        });

        self::assertSame('/about/', $result);
    }

    public function test_filter_acf_load_value_returns_array_unchanged(): void
    {
        $this->set_routing_context();

        self::assertSame(
            ['a', 'b'],
            LinkFilter::filter_acf_load_value(['a', 'b'])
        );
    }
}