<?php
declare(strict_types=1);

namespace WPMultiCity\Tests;

use WPMultiCity\ShortcodeDmr;

final class ShortcodeDmrTest extends TestCase
{
    public function test_register_attaches_init_action(): void
    {
        ShortcodeDmr::register();

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

    public function test_do_register_registers_shortcode(): void
    {
        \Brain\Monkey\Functions\expect('add_shortcode')
            ->once()
            ->with('shortcode_dmr', [ShortcodeDmr::class, 'render']);

        ShortcodeDmr::do_register();

        self::assertTrue(true);
    }

    public function test_render_returns_text_when_row_matches_current_town(): void
    {
        $_SERVER['REQUEST_URI'] = '/tyumen/';
        \Brain\Monkey\Functions\when('get_terms')->justReturn([10 => 'spb', 11 => 'tyumen']);

        $term = new \WP_Term();
        $term->term_id = 11;
        $term->slug = 'tyumen';
        \Brain\Monkey\Functions\when('get_term_by')->alias(function ($field, $slug, $tax) use ($term) {
            return ($field === 'slug' && $slug === 'tyumen' && $tax === 'town') ? $term : false;
        });

        \Brain\Monkey\Functions\expect('get_field')
            ->once()
            ->with('list_shortcode', 42)
            ->andReturn([
                ['town' => 10, 'text' => 'СПб-текст'],
                ['town' => 11, 'text' => 'Тюмень-текст'],
            ]);

        $result = ShortcodeDmr::render(['id' => 42]);

        self::assertSame('Тюмень-текст', $result);
    }

    public function test_render_returns_empty_when_id_is_zero(): void
    {
        \Brain\Monkey\Functions\expect('get_field')->never();
        self::assertSame('', ShortcodeDmr::render(['id' => 0]));
    }

    public function test_render_returns_empty_when_current_town_is_null(): void
    {
        $_SERVER['REQUEST_URI'] = '/no-matching-segment/';
        \Brain\Monkey\Functions\when('get_terms')->justReturn([10 => 'spb']);
        \Brain\Monkey\Functions\expect('get_field')->never();

        self::assertSame('', ShortcodeDmr::render(['id' => 42]));
    }

    public function test_render_returns_empty_when_term_lookup_fails(): void
    {
        $_SERVER['REQUEST_URI'] = '/tyumen/';
        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => 'tyumen']);
        \Brain\Monkey\Functions\when('get_term_by')->justReturn(false);
        \Brain\Monkey\Functions\expect('get_field')->never();

        self::assertSame('', ShortcodeDmr::render(['id' => 42]));
    }

    public function test_render_returns_empty_when_rows_are_empty(): void
    {
        $_SERVER['REQUEST_URI'] = '/tyumen/';
        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => 'tyumen']);
        $term = new \WP_Term();
        $term->term_id = 11;
        $term->slug = 'tyumen';
        \Brain\Monkey\Functions\when('get_term_by')->justReturn($term);
        \Brain\Monkey\Functions\expect('get_field')->once()->andReturn([]);

        self::assertSame('', ShortcodeDmr::render(['id' => 42]));
    }

    public function test_render_returns_empty_when_no_row_matches(): void
    {
        $_SERVER['REQUEST_URI'] = '/tyumen/';
        \Brain\Monkey\Functions\when('get_terms')->justReturn([10 => 'spb', 11 => 'tyumen']);
        $term = new \WP_Term();
        $term->term_id = 11;
        $term->slug = 'tyumen';
        \Brain\Monkey\Functions\when('get_term_by')->justReturn($term);
        \Brain\Monkey\Functions\expect('get_field')
            ->once()
            ->andReturn([['town' => 10, 'text' => 'Только СПб']]);

        self::assertSame('', ShortcodeDmr::render(['id' => 42]));
    }
}