<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Integrations\Divi\Pages;

use LIT\MCP\Abilities\Rev;
use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
use LIT\MCP\Integrations\Divi\BlockTree\Parser;
use LIT\MCP\Tests\Support\DiviFixtures;

final class DiviDeleteAbilityTest extends DiviWriteAbilityTestCase
{
    /** The stored content equals the original minus exactly that block's bytes; revision_id is the restore point. */
    public function testDeleteAModuleRemovesExactlyItsBytes(): void
    {
        $buttonBytes = '<!-- wp:divi/button {"button":{"innerContent":{"desktop":{"value":{"text":"Termin buchen",'
            . '"linkUrl":"/kontakt","linkTarget":"off"}}}},"module":{"meta":{"adminLabel":{"desktop":{"value":"Hero –'
            . ' Button"}}}},"builderVersion":"5.2.1"} --><!-- /wp:divi/button -->';
        self::assertStringContainsString($buttonBytes, $this->original, 'precondition: exact bytes as expected');

        $result = $this->delete()->execute([
            'post_id' => 7, 'tree_rev' => $this->treeRev(), 'ids' => ['s0.r0.c1.m2'], 'confirm' => true,
        ]);

        self::assertSame([['id' => 's0.r0.c1.m2', 'type' => 'divi/button', 'action' => 'deleted', 'label' => 'Hero – Button']], $result['changed']);
        self::assertSame(str_replace($buttonBytes, '', $this->original), $this->saved[0]);
        self::assertSame(811, $result['revision_id'], 'the restore-point revision');
        self::assertStringContainsString('Hero', (string) $result['outline'], 'the outline is embedded in the result');
    }

    /** An opaque/global module is removed as a whole – it never gets descended into. */
    public function testDeleteRemovesAnOpaqueGlobalModuleAsAWhole(): void
    {
        $mixed = DiviFixtures::markup('synthetic-mixed.html');
        $this->post->post_content = $mixed;
        $globalRow = '<!-- wp:divi/row {"globalModule":"913","module":{"meta":{"adminLabel":{"desktop":{"value":'
            . '"Globale Zeile"}}}}} --><!-- wp:divi/column {"builderVersion":"5.2.1"} --><!-- wp:divi/text '
            . '{"content":{"innerContent":{"desktop":{"value":"lokal"}}}} /--><!-- /wp:divi/column --><!-- /wp:divi/row'
            . ' -->';
        self::assertStringContainsString($globalRow, $mixed, 'precondition: exact bytes as expected');

        $result = $this->delete()->execute([
            'post_id' => 7, 'tree_rev' => Rev::of($mixed), 'ids' => ['s1.g1'], 'confirm' => true,
        ]);

        self::assertSame([['id' => 's1.g1', 'type' => 'divi/row', 'action' => 'deleted', 'label' => 'Globale Zeile']], $result['changed']);
        self::assertSame(str_replace($globalRow, '', $mixed), $this->saved[0]);
    }

    public function testDeletingTheLastChildLeavesAValidTree(): void
    {
        $mixed = DiviFixtures::markup('synthetic-mixed.html');
        $this->post->post_content = $mixed;

        $result = $this->delete()->execute([
            'post_id' => 7, 'tree_rev' => Rev::of($mixed), 'ids' => ['s0.c1.r0.c0.m0'], 'confirm' => true,
        ]);

        self::assertTrue($result['ok'], (string) json_encode($result));
        $index = NodeIndex::build((new Parser())->parse($this->saved[0]));
        $emptyColumn = $index->find('s0.c1.r0.c0');
        self::assertNotNull($emptyColumn, 'the now-empty column-inner is still a valid, findable node');
        self::assertSame([], $emptyColumn->children());
    }

    public function testDeleteUnknownIdReturnsNotFound(): void
    {
        $result = $this->delete()->execute([
            'post_id' => 7, 'tree_rev' => $this->treeRev(), 'ids' => ['s9'], 'confirm' => true,
        ]);

        self::assertToolError($result, 'not_found');
        self::assertSame('not_found', self::clientError($result)['code']);
        self::assertSame([], $this->saved);
    }

    /** Same annotations as the existing destructive tools (e.g. MediaDeleteAbility). */
    public function testDeleteAnnotationsMatchExistingDestructiveTools(): void
    {
        self::assertSame(
            ['readonly' => false, 'destructive' => true, 'idempotent' => false],
            $this->delete()->annotations()
        );
    }

    /** Ruling S14 (Task 7): the deleted node's own confirm question, unaffected by other tests. */
    public function testDeleteAsksBeforeRemovingNestedNodesOnlyOnce(): void
    {
        $duplicated = $this->duplicate()->execute(['post_id' => 7, 'tree_rev' => $this->treeRev(), 'id' => 's1']);
        self::assertSame('s2', $duplicated['changed'][0]['id']);

        $delete = $this->delete();
        $ask = $delete->execute(['post_id' => 7, 'tree_rev' => Rev::of($this->saved[0]), 'ids' => ['s2', 's2.r0']]);
        self::assertToolError($ask, 'confirm_required');
        self::assertSame(
            '1 Divi-Knoten würden samt Inhalt entfernt: s2 section "Leistungen (Kopie)" (1 Kind-Knoten).',
            self::clientError($ask)['message']
        );

        $deleted = $delete->execute(['post_id' => 7, 'tree_rev' => Rev::of($this->saved[0]), 'ids' => ['s2'], 'confirm' => true]);
        self::assertSame([['id' => 's2', 'type' => 'divi/section', 'action' => 'deleted', 'label' => 'Leistungen (Kopie)']], $deleted['changed']);
        self::assertSame($this->original, $this->saved[1], 'deleting the copy restores the exact bytes');
    }
}