<?php
declare(strict_types=1);

namespace WPMultiCity\Tests;

use WPMultiCity\OptionsPage;

final class OptionsPageTest extends TestCase
{
    public function test_register_attaches_acf_init_action(): void
    {
        OptionsPage::register();

        self::assertNotFalse(
            has_action('acf/init', [OptionsPage::class, 'do_register']),
            'OptionsPage::register() must hook acf/init'
        );
    }

    public function test_register_attaches_main_town_slug_filter(): void
    {
        OptionsPage::register();

        self::assertNotFalse(
            has_filter('wpmc_main_town_slug', ['WPMultiCity\\Helpers', 'main_town_slug']),
            'OptionsPage::register() must hook wpmc_main_town_slug filter'
        );
    }

    public function test_do_register_is_noop_when_acf_missing(): void
    {
        // Order matters: expect() must come BEFORE function_exists alias so that
        // Brain Monkey's FunctionStub::__construct sees the real function_exists
        // and doesn't re-eval an already-declared stub.
        \Brain\Monkey\Functions\expect('acf_add_options_page')->never();
        \Brain\Monkey\Functions\expect('acf_add_local_field_group')->never();
        \Brain\Monkey\Functions\when('function_exists')->alias(function ($name) {
            return $name !== 'acf_add_options_page' && $name !== 'acf_add_local_field_group';
        });

        OptionsPage::do_register();

        self::assertTrue(true);
    }

    public function test_do_register_creates_options_page(): void
    {
        \Brain\Monkey\Functions\expect('acf_add_options_page')
            ->once()
            ->with(\Mockery::on(function ($args) {
                return ($args['menu_slug'] ?? null) === 'wp-multi-city'
                    && ($args['page_title'] ?? null) === 'WP Multi City';
            }));
        \Brain\Monkey\Functions\when('acf_add_local_field_group')->justReturn();
        \Brain\Monkey\Functions\when('function_exists')->alias(function ($name) {
            return $name === 'acf_add_options_page' || $name === 'acf_add_local_field_group';
        });

        OptionsPage::do_register();

        self::assertTrue(true);
    }

    public function test_do_register_registers_routing_field_group(): void
    {
        \Brain\Monkey\Functions\when('acf_add_options_page')->justReturn();

        $captured = null;
        \Brain\Monkey\Functions\expect('acf_add_local_field_group')
            ->once()
            ->with(\Mockery::on(function ($group) use (&$captured) {
                $captured = $group;
                return true;
            }));
        \Brain\Monkey\Functions\when('function_exists')->alias(function ($name) {
            return $name === 'acf_add_options_page' || $name === 'acf_add_local_field_group';
        });

        OptionsPage::do_register();

        self::assertSame('group_wpmc_routing', $captured['key']);
        self::assertSame(
            [[['param' => 'options_page', 'operator' => '==', 'value' => 'wp-multi-city']]],
            $captured['location']
        );

        $names = array_column($captured['fields'], 'name');
        self::assertContains('main_town_slug', $names);
        self::assertContains('index_town_alt', $names);
        self::assertContains('page_unic', $names);
        self::assertContains('page_no_rep', $names);
    }
}