<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Integrations\WordPress\Menus;

use LIT\MCP\Integrations\WordPress\Menus\MenuOperations;
use LIT\MCP\Tests\Unit\TestCase;

final class MenuOperationsTest extends TestCase
{
    /** @return list<array<string, mixed>> Start(1) > Team(2); Kontakt(3) */
    private function tree(): array
    {
        return [
            ['id' => 1, 'title' => 'Start', 'children' => [['id' => 2, 'title' => 'Team', 'children' => []]]],
            ['id' => 3, 'title' => 'Kontakt', 'children' => []],
        ];
    }

    public function testAddInsertsANewNodeAtThePosition(): void
    {
        $result = (new MenuOperations())->apply($this->tree(), [
            ['op' => 'add', 'item' => ['type' => 'custom', 'url' => '/blog', 'title' => 'Blog'], 'position' => 1],
        ]);

        self::assertSame(1, $result[0]['id']);
        self::assertSame(['type' => 'custom', 'url' => '/blog', 'title' => 'Blog', 'children' => []], $result[1]);
        self::assertSame(3, $result[2]['id']);
    }

    public function testMoveAndRemoveKeepChildren(): void
    {
        $result = (new MenuOperations())->apply($this->tree(), [
            ['op' => 'move', 'id' => 3, 'parent_id' => 1, 'position' => 0],
            ['op' => 'remove', 'id' => 1],
        ]);

        self::assertSame([3, 2], array_column($result, 'id'));
        self::assertSame([], $result[0]['children']);
    }

    public function testInvalidOperationsAreReportedWithTheirIndex(): void
    {
        $operations = new MenuOperations();

        $unknown = $operations->apply($this->tree(), [['op' => 'move', 'id' => 99]]);
        $cycle = $operations->apply($this->tree(), [['op' => 'move', 'id' => 1, 'parent_id' => 2]]);
        $badOp = $operations->apply($this->tree(), [['op' => 'rename', 'id' => 1]]);

        self::assertArrayHasKey('operations.0', $unknown->get_error_data()['fields']);
        self::assertStringContainsString('unter sich selbst', $cycle->get_error_data()['fields']['operations.0']);
        self::assertStringContainsString('add, move oder remove', $badOp->get_error_data()['fields']['operations.0']);
    }

    public function testExistingNodesKeepOnlyTheirIdSoTheWriterKeepsTheirData(): void
    {
        $result = (new MenuOperations())->apply($this->tree(), [['op' => 'move', 'id' => 2]]);

        self::assertSame(
            [['id' => 1, 'children' => []], ['id' => 3, 'children' => []], ['id' => 2, 'children' => []]],
            $result
        );
    }

    public function testRemoveIgnoresParentId(): void
    {
        $result = (new MenuOperations())->apply($this->tree(), [['op' => 'remove', 'id' => 3, 'parent_id' => 99]]);

        self::assertSame([1], array_column($result, 'id'));
    }
}