<?php

declare(strict_types=1);

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

use Brain\Monkey\Functions;
use LIT\MCP\Abilities\Errors;
use LIT\MCP\Abilities\WriteFailed;
use LIT\MCP\Integrations\Divi\ThemeBuilder\DiviThemeBuilder;
use LIT\MCP\Integrations\Divi\ThemeBuilder\InsertedBeforeFailure;
use LIT\MCP\Integrations\Divi\ThemeBuilder\TemplateBuild;
use LIT\MCP\Tests\Support\FakeChangeLog;
use LIT\MCP\Tests\Support\ThemeBuilderFixtures;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use RuntimeException;
use WP_Post;

final class TemplateBuildTest extends TestCase
{
    protected function setUp(): void
    {
        parent::setUp();
        Functions\when('wp_delete_object_term_relationships')->justReturn(null);
    }

    public function testRollsBackEveryCreatedPostInReverse(): void
    {
        $store = ThemeBuilderFixtures::store();
        $store->shouldReceive('insertLayout')->andReturn(2101, 2102);
        $store->shouldReceive('storeTemplate')->andReturn(2100);
        $store->shouldReceive('attach')->once()->with(1064, 2100);
        $store->shouldReceive('detach')->once()->with(1064, 2100);
        $deleted = [];
        Functions\when('wp_delete_post')->alias(static function (int $id, bool $force) use (&$deleted): WP_Post {
            $deleted[] = [$id, $force];

            return new WP_Post(['ID' => $id]);
        });
        $build = new TemplateBuild($store, FakeChangeLog::forbidden(), 'lit/tb-create-template');
        $build->layout('header', 'Kopf');
        $build->layout('body', 'Inhalt');
        $build->template(1064, ['title' => 'Person', 'layouts' => [], 'use_on' => [], 'exclude_from' => []]);
        $build->attach(1064, 2100);

        try {
            $build->rollBack(new RuntimeException('Divi dropped a layout'));
            self::fail('no WriteFailed');
        } catch (WriteFailed $e) {
            self::assertTrue($e->rolledBack);
        }
        self::assertSame([[2100, true], [2102, true], [2101, true]], $deleted);
    }

    /** Ruling Q4/B4: the partial write is logged as a partial row naming the posts left behind. */
    public function testAFailedDeleteIsAPartialWrite(): void
    {
        $store = ThemeBuilderFixtures::store();
        $store->shouldReceive('insertLayout')->andReturn(2101);
        Functions\when('wp_delete_post')->justReturn(false);
        $log = FakeChangeLog::partialsOnly();
        $build = new TemplateBuild($store, $log, 'lit/tb-create-template');
        $build->layout('body', 'Inhalt');

        try {
            $build->rollBack(new RuntimeException('store failed'));
            self::fail('no WriteFailed');
        } catch (WriteFailed $e) {
            self::assertFalse($e->rolledBack);
            self::assertSame([2101], $e->details['left_ids']);
            self::assertToolError($e->toError(), 'partial_write');
        }
        $log->assertPartials([
            'ability' => 'lit/tb-create-template',
            'object_type' => 'et_template',
            'object_id' => '2101',
        ]);
    }

    public function testARefusalAfterTheInsertRemovesTheNewPostsAndReturnsTheRefusal(): void
    {
        $store = ThemeBuilderFixtures::store();
        $store->shouldReceive('insertLayout')->andReturn(2101);
        Functions\expect('wp_delete_post')->once()->with(2101, true)->andReturn(new WP_Post(['ID' => 2101]));
        $build = new TemplateBuild($store, FakeChangeLog::forbidden(), 'lit/tb-create-template');
        $build->layout('body', 'Inhalt');
        $refusal = Errors::invalidInput('Divi-Inhalt ist ungültig; nichts wurde angelegt.', ['body.nodes' => 'x']);

        self::assertSame($refusal, $build->refuse($refusal));
    }

    public function testAFailedCleanupAfterARefusalIsAPartialWrite(): void
    {
        $store = ThemeBuilderFixtures::store();
        $store->shouldReceive('insertLayout')->andReturn(2101);
        Functions\when('wp_delete_post')->justReturn(null);
        $log = FakeChangeLog::partialsOnly();
        $build = new TemplateBuild($store, $log, 'lit/tb-create-template');
        $build->layout('body', 'Inhalt');

        try {
            $build->refuse(Errors::invalidInput('x', ['body.nodes' => 'x']));
            self::fail('no WriteFailed');
        } catch (WriteFailed $e) {
            self::assertFalse($e->rolledBack);
        }
        $log->assertPartials(['object_id' => '2101']);
    }

    /** Ruling Q8/B12: a live Theme Builder post Divi creates for this build is part of it (all or nothing). */
    public function testALiveThemeBuilderPostCreatedHereIsRolledBackToo(): void
    {
        $store = Mockery::mock(DiviThemeBuilder::class);
        $store->shouldReceive('liveId')->once()->with(false)->andReturn(0);
        $store->shouldReceive('liveId')->once()->with(true)->andReturn(3000);
        $store->shouldReceive('insertLayout')->andReturn(2101);
        $deleted = [];
        Functions\when('wp_delete_post')->alias(static function (int $id) use (&$deleted): WP_Post {
            $deleted[] = $id;

            return new WP_Post(['ID' => $id]);
        });
        $build = new TemplateBuild($store, FakeChangeLog::forbidden(), 'lit/tb-create-template');
        $build->layout('body', 'Inhalt');

        self::assertSame(3000, $build->themeBuilder());
        self::assertSame([2101, 3000], $build->created());
        try {
            $build->rollBack(new RuntimeException('later failure'));
        } catch (WriteFailed) {
        }
        self::assertSame([3000, 2101], $deleted);
    }

    public function testAnExistingLiveThemeBuilderPostIsNeverDeleted(): void
    {
        $store = Mockery::mock(DiviThemeBuilder::class);
        $store->shouldReceive('liveId')->once()->with(false)->andReturn(1064);
        $store->shouldReceive('liveId')->with(true)->never();
        Functions\expect('wp_delete_post')->never();
        $build = new TemplateBuild($store, FakeChangeLog::forbidden(), 'lit/tb-create-template');

        self::assertSame(1064, $build->themeBuilder());
        self::assertSame([], $build->created());
        $this->expectException(WriteFailed::class);
        $build->rollBack(new RuntimeException('later failure'));
    }

    public function testNoLiveThemeBuilderPostThrows(): void
    {
        $store = Mockery::mock(DiviThemeBuilder::class);
        $store->shouldReceive('liveId')->andReturn(0);
        $build = new TemplateBuild($store, FakeChangeLog::forbidden(), 'lit/tb-create-template');

        $this->expectException(RuntimeException::class);
        $build->themeBuilder();
    }

    /** Ruling Q19: posts Divi inserted before it threw are part of the build and rolled back. */
    public function testPostsInsertedBeforeDiviThrewAreRolledBack(): void
    {
        $store = ThemeBuilderFixtures::store();
        $store->shouldReceive('insertLayout')->once()->andReturn(2101);
        $store->shouldReceive('storeTemplate')->once()->andThrow(
            new InsertedBeforeFailure('Divi called wp_die(): hook', [2100], new RuntimeException('hook'))
        );
        $deleted = [];
        Functions\when('wp_delete_post')->alias(static function (int $id) use (&$deleted): WP_Post {
            $deleted[] = $id;

            return new WP_Post(['ID' => $id]);
        });
        $build = new TemplateBuild($store, FakeChangeLog::forbidden(), 'lit/tb-create-template');
        $build->layout('body', 'Inhalt');

        try {
            $build->template(1064, ['title' => 'P', 'layouts' => [], 'use_on' => [], 'exclude_from' => []]);
            self::fail('no exception');
        } catch (InsertedBeforeFailure $e) {
            self::assertSame([2101, 2100], $build->created());
            try {
                $build->rollBack($e);
            } catch (WriteFailed $failed) {
                self::assertTrue($failed->rolledBack);
            }
        }
        self::assertSame([2100, 2101], $deleted);
    }

    public function testALayoutInsertedBeforeDiviThrewIsRolledBack(): void
    {
        $store = ThemeBuilderFixtures::store();
        $store->shouldReceive('insertLayout')->once()->andThrow(
            new InsertedBeforeFailure('terms failed', [2101], new RuntimeException('terms failed'))
        );
        Functions\expect('wp_delete_post')->once()->with(2101, true)->andReturn(new WP_Post(['ID' => 2101]));
        $build = new TemplateBuild($store, FakeChangeLog::forbidden(), 'lit/tb-create-template');

        try {
            $build->layout('body', 'Inhalt');
            self::fail('no exception');
        } catch (InsertedBeforeFailure $e) {
            $this->expectException(WriteFailed::class);
            $build->rollBack($e);
        }
    }

    /** WordPress leaves layout_type relationships behind for TB layouts (taxonomy not registered for them). */
    public function testTheLayoutTypeTermRelationshipsGoToo(): void
    {
        $store = ThemeBuilderFixtures::store();
        $store->shouldReceive('insertLayout')->andReturn(2101);
        $calls = [];
        Functions\when('wp_delete_object_term_relationships')->alias(
            static function (int $id, string $taxonomy) use (&$calls): void {
                $calls[] = [$id, $taxonomy, 'terms'];
            }
        );
        Functions\when('wp_delete_post')->alias(static function (int $id) use (&$calls): WP_Post {
            $calls[] = [$id, 'post'];

            return new WP_Post(['ID' => $id]);
        });
        $build = new TemplateBuild($store, FakeChangeLog::forbidden(), 'lit/tb-create-template');
        $build->layout('body', 'Inhalt');

        try {
            $build->rollBack(new RuntimeException('later'));
        } catch (WriteFailed) {
        }
        self::assertSame([[2101, 'layout_type', 'terms'], [2101, 'post']], $calls);
    }

    /** Ruling Q19: the partial write names only what is left, and a refusal keeps every failure. */
    public function testAPartialWriteNamesOnlyThePostsLeft(): void
    {
        $store = ThemeBuilderFixtures::store();
        $store->shouldReceive('insertLayout')->andReturn(2101, 2102, 2103);
        Functions\when('wp_delete_post')->alias(
            static fn (int $id): WP_Post|false => $id === 2101 ? new WP_Post(['ID' => $id]) : false
        );
        $log = FakeChangeLog::partialsOnly();
        $build = new TemplateBuild($store, $log, 'lit/tb-create-template');
        $build->layout('header', 'Kopf');
        $build->layout('body', 'Inhalt');
        $build->layout('footer', 'Fuß');

        try {
            $build->refuse(Errors::invalidInput('x', ['body.nodes' => 'x']));
            self::fail('no WriteFailed');
        } catch (WriteFailed $e) {
            self::assertSame([2103, 2102], $e->details['left_ids']);
            self::assertStringContainsString('post 2103 not deleted', $e->getMessage());
            self::assertStringContainsString('post 2102 not deleted', $e->getMessage());
        }
        $log->assertPartials(['object_id' => '2103, 2102']);
    }
}