<?php

declare(strict_types=1);

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

use Brain\Monkey\Functions;
use LIT\MCP\Abilities\Rev;
use LIT\MCP\Abilities\WriteFailed;
use LIT\MCP\Integrations\Divi\Pages\DiviDeleteAbility;
use LIT\MCP\Integrations\Divi\Pages\DiviInsertAbility;
use LIT\MCP\Integrations\Divi\Pages\DiviReplaceTextAbility;
use LIT\MCP\Integrations\Divi\Pages\DiviSaver;
use LIT\MCP\Integrations\Divi\Pages\DiviWriter;
use LIT\MCP\Integrations\Divi\Pages\DynamicFields;
use LIT\MCP\Integrations\Divi\Pages\VisibleEdits;
use LIT\MCP\Integrations\Divi\ThemeBuilder\Template;
use LIT\MCP\Integrations\Divi\ThemeBuilder\ThemeBuilderEdits;
use LIT\MCP\Tests\Support\DiviFixtures;
use LIT\MCP\Tests\Support\DiviWriterFixture;
use LIT\MCP\Tests\Support\LibraryFixtures;
use LIT\MCP\Tests\Support\ThemeBuilderFixtures;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use Throwable;
use WP_Post;

/** The Divi write tools on Theme Builder layouts (E1, Task 5). */
final class DiviWriterThemeBuilderTest extends TestCase
{
    /** @var list<string> */
    private array $saved = [];

    /** @var list<Throwable> */
    private array $failures = [];

    private WP_Post $body;

    private WP_Post $header;

    protected function setUp(): void
    {
        parent::setUp();
        $this->body = ThemeBuilderFixtures::layout(ThemeBuilderFixtures::BODY);
        $this->header = ThemeBuilderFixtures::layout(ThemeBuilderFixtures::HEADER);
        LibraryFixtures::given([$this->body, $this->header]);
        Functions\when('admin_url')->alias(static fn (string $path): string => 'https://kunde.test/wp-admin/' . $path);
        Functions\when('wp_revisions_enabled')->justReturn(true);
    }

    /** @param list<Template> $templates */
    private function writer(array $templates, ?VisibleEdits $visible = null, ?DynamicFields $fields = null): DiviWriter
    {
        $access = ThemeBuilderFixtures::access([], true, ThemeBuilderFixtures::store($templates));

        return DiviWriterFixture::writer(
            $this->saved,
            $this->failures,
            false,
            ThemeBuilderFixtures::loader($access),
            null,
            new ThemeBuilderEdits($access, $visible ?? new VisibleEdits(), $fields)
        );
    }

    /** @param array<string, mixed> $extra @return array<string, mixed> */
    private function insert(WP_Post $post, array $extra): array
    {
        return array_merge([
            'post_id' => (int) $post->ID,
            'tree_rev' => Rev::of((string) $post->post_content),
            'parent' => 's0.r0.c0',
            'nodes' => [['type' => 'text', 'content' => 'Zusatz']],
        ], $extra);
    }

    public function testInsertIntoALiveLayoutIsADryRunFirst(): void
    {
        $ability = new DiviInsertAbility($this->writer([ThemeBuilderFixtures::template(1066, ['enabled' => true])]));

        $dry = $ability->execute($this->insert($this->body, []));
        self::assertToolError($dry, 'confirm_required');
        self::assertSame([], $this->saved);

        $result = $ability->execute($this->insert($this->body, ['confirm' => true]));
        self::assertTrue($result['ok']);
        self::assertCount(1, $this->saved);
        self::assertSame(1066, $result['templates'][0]['id']);
        // Audit L3: lit/revision-restore does not take Theme Builder layouts – the WordPress revision screen does.
        self::assertSame('https://kunde.test/wp-admin/revision.php?revision=811', $result['restore_url']);
    }

    public function testLayoutOfADisabledTemplateSavesAtOnce(): void
    {
        $result = (new DiviInsertAbility($this->writer([ThemeBuilderFixtures::template()])))
            ->execute($this->insert($this->body, []));

        self::assertTrue($result['ok']);
        self::assertSame([], $result['templates']);
        self::assertStringContainsString('Zusatz', $this->saved[0]);
        self::assertSame('https://kunde.test/wp-admin/admin.php?page=et_theme_builder', $result['edit_url'] ?? null);
    }

    public function testDeleteInALiveLayoutAsksOnceForBoth(): void
    {
        $ability = new DiviDeleteAbility($this->writer([ThemeBuilderFixtures::template(1066, ['enabled' => true])]));
        $input = ['post_id' => 1062, 'tree_rev' => Rev::of((string) $this->body->post_content), 'ids' => ['s0.r0.c0.m1']];

        $dry = $ability->execute($input);
        self::assertToolError($dry, 'confirm_required');
        self::assertArrayHasKey('templates', $dry->get_error_data());

        $result = $ability->execute($input + ['confirm' => true]);
        self::assertTrue($result['ok']);
        self::assertCount(1, $this->saved);
    }

    public function testPostContentOnlyInTheBody(): void
    {
        $ability = new DiviInsertAbility($this->writer([]));
        $postContent = ['nodes' => [['type' => 'post-content']]];

        self::assertToolError($ability->execute($this->insert($this->header, $postContent)), 'validation_failed');
        self::assertTrue($ability->execute($this->insert($this->body, $postContent))['ok']);
    }

    /** Ruling Q2 / P14: a failed save of a live layout after its backup names the backup. */
    public function testAFailedSaveAfterTheBackupNamesIt(): void
    {
        Functions\when('wp_revisions_enabled')->justReturn(false);
        $this->failures = [WriteFailed::rolledBack(DiviSaver::REASON, new \RuntimeException('hook'), postId: 1062)];
        $backups = 0;
        $visible = new VisibleEdits(static function (WP_Post $post) use (&$backups): int {
            ++$backups;

            return 1071;
        }, static fn (): bool => true);
        $ability = new DiviInsertAbility(
            $this->writer([ThemeBuilderFixtures::template(1066, ['enabled' => true])], $visible)
        );

        try {
            $ability->execute($this->insert($this->body, ['confirm' => true]));
            self::fail('WriteFailed expected');
        } catch (WriteFailed $e) {
            $error = $e->toError();
        }

        self::assertSame(1, $backups);
        self::assertSame(1071, $error->get_error_data()['backup_id']);
        self::assertSame(
            VisibleEditsTest::keptRolledBack(1071, 'des Theme-Builder-Layouts'),
            $error->get_error_data()['hint']
        );
        self::assertSame([], $this->saved);
    }

    /** Audit L3 on the failure path: a failed layout save names the WordPress revision screen. */
    public function testAFailedSaveNamesTheRevisionScreen(): void
    {
        $this->failures = [WriteFailed::rolledBack(DiviSaver::REASON, new \RuntimeException('hook'), postId: 1062, revisionId: 811)];
        $ability = new DiviInsertAbility($this->writer([ThemeBuilderFixtures::template()]));

        try {
            $ability->execute($this->insert($this->body, []));
            self::fail('WriteFailed expected');
        } catch (WriteFailed $e) {
            $error = $e->toError();
        }

        self::assertSame('https://kunde.test/wp-admin/revision.php?revision=811', $error->get_error_data()['restore_url']);
        self::assertStringNotContainsString('lit/revision-restore', $error->get_error_data()['hint']);
    }

    /** Without a ThemeBuilderEdits (no Theme Builder wiring) a layout is never written. */
    public function testWithoutThemeBuilderEditsLayoutsAreNotWritten(): void
    {
        $access = ThemeBuilderFixtures::access([], true, ThemeBuilderFixtures::store([]));
        $writer = DiviWriterFixture::writer($this->saved, $this->failures, false, ThemeBuilderFixtures::loader($access));

        self::assertToolError((new DiviInsertAbility($writer))->execute($this->insert($this->body, [])), 'unsupported');
        self::assertSame([], $this->saved);
    }

    /** lit/divi-replace-text never sends confirm: a live layout only answers with its templates. */
    public function testReplaceTextLeavesALiveLayoutAndNamesItsTemplates(): void
    {
        Functions\when('get_post_type_object')->justReturn(
            (object) ['cap' => (object) ['edit_posts' => 'edit_pages', 'edit_others_posts' => 'edit_others_pages']]
        );
        $access = ThemeBuilderFixtures::access(
            [],
            true,
            ThemeBuilderFixtures::store([ThemeBuilderFixtures::template(1065, ['enabled' => true])])
        );
        $loader = ThemeBuilderFixtures::loader($access);
        $writer = DiviWriterFixture::writer($this->saved, $this->failures, false, $loader, null, new ThemeBuilderEdits($access));
        $ability = new DiviReplaceTextAbility(DiviFixtures::schema(), $loader, $writer, Mockery::mock(\wpdb::class)->makePartial());

        $result = $ability->execute([
            'search' => 'Globaler Header der Standard-Vorlage',
            'replace' => 'Kopfzeile',
            'dry_run' => false,
            'confirm' => true,
            'targets' => [['post_id' => 1061, 'tree_rev' => Rev::of((string) $this->header->post_content)]],
        ]);

        self::assertIsArray($result, $result instanceof \WP_Error ? $result->get_error_message() : '');
        $entry = $result['results'][0];
        self::assertFalse($entry['ok']);
        self::assertStringContainsString('Theme-Builder-Layout 1061', $entry['error']);
        self::assertStringContainsString('lit-divi-update', $entry['error']);
        self::assertStringNotContainsString('Globale Bibliothekseinträge', $entry['error']);
        self::assertSame(1065, $entry['templates'][0]['id']);
        self::assertSame([], $this->saved);
    }

    /** Ruling Q22: replace-text on a layout shown only by a template the user may not edit names nothing. */
    public function testReplaceTextOnALayoutOfAHiddenTemplateLeaksNothing(): void
    {
        Functions\when('get_post_type_object')->justReturn(
            (object) ['cap' => (object) ['edit_posts' => 'edit_pages', 'edit_others_posts' => 'edit_others_pages']]
        );
        Functions\when('current_user_can')->alias(static fn (string $cap, mixed $id = null): bool => $id !== 1065);
        $access = ThemeBuilderFixtures::access(
            [],
            true,
            ThemeBuilderFixtures::store([ThemeBuilderFixtures::template(1065, ['enabled' => true])])
        );
        $loader = ThemeBuilderFixtures::loader($access);
        $writer = DiviWriterFixture::writer($this->saved, $this->failures, false, $loader, null, new ThemeBuilderEdits($access));
        $ability = new DiviReplaceTextAbility(DiviFixtures::schema(), $loader, $writer, Mockery::mock(\wpdb::class)->makePartial());

        $result = $ability->execute([
            'search' => 'Globaler Header der Standard-Vorlage',
            'replace' => 'Kopfzeile',
            'dry_run' => false,
            'confirm' => true,
            'targets' => [['post_id' => 1061, 'tree_rev' => Rev::of((string) $this->header->post_content)]],
        ]);

        self::assertIsArray($result, $result instanceof \WP_Error ? $result->get_error_message() : '');
        $entry = $result['results'][0];
        self::assertFalse($entry['ok']);
        self::assertStringContainsString('Theme-Builder-Layout 1061', $entry['error']);
        self::assertSame([], $entry['templates']);
        self::assertSame(1, $entry['hidden_templates']);
        self::assertStringNotContainsString('1065', (string) json_encode($entry));
        self::assertStringNotContainsString('Standard-Website-Template', (string) json_encode($entry));
        self::assertSame([], $this->saved);
    }

    /** Review M-12 (a): the field warnings stay in the answer when the live edit is refused for its backup (P9). */
    public function testFieldWarningsSurviveABackupRefusal(): void
    {
        Functions\when('wp_revisions_enabled')->justReturn(false);
        $field = ['nodes' => [['type' => 'text', 'content' => '{{field:telefon}}']], 'confirm' => true];
        $live = ThemeBuilderFixtures::template(1066, ['enabled' => true, 'use_on' => ['singular:post_type:lit_person:all']]);
        $visible = new VisibleEdits(static fn (WP_Post $post): int => 1071, static fn (): bool => false);

        $refused = (new DiviInsertAbility($this->writer([$live], $visible, self::unknownFields())))
            ->execute($this->insert($this->body, $field));

        self::assertToolError($refused, 'unsupported');
        self::assertStringContainsString('Papierkorb', self::clientError($refused)['message']);
        self::assertStringContainsString('„telefon“', implode(' ', $refused->get_error_data()['warnings']));
        self::assertSame([], $this->saved);
    }

    private static function unknownFields(): DynamicFields
    {
        $fields = Mockery::mock(DynamicFields::class);
        $fields->allows('reason')->andReturn('kein bekanntes Feld dieses Inhaltstyps');
        $fields->allows('note')->andReturnNull();

        return $fields;
    }

    /** E12: an unsuitable field in a body is a warning – saved anyway; the dry run of a live body shows it too. */
    public function testFieldWarningsInTheResultAndInTheDryRun(): void
    {
        $field = ['nodes' => [['type' => 'text', 'content' => '{{field:telefon}}']]];
        $disabled = ThemeBuilderFixtures::template(1066, ['use_on' => ['singular:post_type:lit_person:all']]);

        $result = (new DiviInsertAbility($this->writer([$disabled], null, self::unknownFields())))
            ->execute($this->insert($this->body, $field));
        self::assertTrue($result['ok']);
        self::assertCount(1, $this->saved);
        self::assertStringContainsString('„telefon“', implode(' ', $result['warnings']));

        $live = ThemeBuilderFixtures::template(1066, ['enabled' => true, 'use_on' => ['singular:post_type:lit_person:all']]);
        $dry = (new DiviInsertAbility($this->writer([$live], null, self::unknownFields())))
            ->execute($this->insert($this->body, $field));
        self::assertToolError($dry, 'confirm_required');
        self::assertStringContainsString('„telefon“', implode(' ', $dry->get_error_data()['warnings']));
        self::assertCount(1, $this->saved);
    }
}