<?php

declare(strict_types=1);

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

use Brain\Monkey\Functions;
use LIT\MCP\Integrations\Divi\Pages\DiviPage;
use LIT\MCP\Integrations\Divi\Pages\DiviPageLoader;
use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use WP_Error;
use WP_Post;

final class DiviPageLoaderTest extends TestCase
{
    public static function fixture(string $name): string
    {
        return (string) file_get_contents(dirname(__DIR__, 4) . '/Fixtures/divi/' . $name);
    }

    /** Stubs everything PostGuard::editable() needs for a post with $content. */
    public static function givenPost(string $content, array $fields = []): WP_Post
    {
        $post = new WP_Post(array_merge(
            ['ID' => 7, 'post_type' => 'page', 'post_status' => 'draft', 'post_title' => 'Start', 'post_content' => $content],
            $fields
        ));
        Functions\when('get_post')->justReturn($post);
        Functions\when('current_user_can')->justReturn(true);
        Functions\when('get_permalink')->justReturn('https://kunde.test/?page_id=7');
        Functions\when('add_query_arg')->alias(static fn (string $key, string $value, string $url): string => $url . '&' . $key . '=' . $value);

        return $post;
    }

    public static function schema(bool $diviEnabled = true): ContentSchema
    {
        $schema = Mockery::mock(ContentSchema::class);
        $schema->allows('isManaged')->andReturn(true);
        $schema->allows('diviEnabled')->andReturn($diviEnabled);

        return $schema;
    }

    public function testLoadsTreeIndexAndTreeRev(): void
    {
        $content = self::fixture('synthetic-basic.html');
        self::givenPost($content);

        $page = (new DiviPageLoader(self::schema()))->load(7, true);

        self::assertInstanceOf(DiviPage::class, $page);
        self::assertSame(substr(hash('sha256', $content), 0, 12), $page->treeRev());
        self::assertSame('divi/button', $page->index->find('s0.r0.c1.m2')?->name());
        self::assertTrue($page->isDiviLayout());
        self::assertSame('https://kunde.test/?page_id=7&et_fb=1', $page->editUrl());
        self::assertNull((new DiviPageLoader(self::schema()))->writable($page));
    }

    public function testRefusesDivi4Content(): void
    {
        self::givenPost(self::fixture('divi4-shortcodes.html'));

        $result = (new DiviPageLoader(self::schema()))->load(7, false);

        self::assertInstanceOf(WP_Error::class, $result);
        self::assertSame('lit_unsupported', $result->get_error_code());
        self::assertStringContainsString('Divi-4', $result->get_error_message());
    }

    public function testRefusesMalformedMarkupAndLogsIt(): void
    {
        self::givenPost('<!-- wp:divi/section --><!-- wp:divi/row -->');
        // error_log() is a PHP internal and cannot be stubbed; redirect it to a temp file instead.
        $log = (string) tempnam(sys_get_temp_dir(), 'lit-log');
        $previous = ini_set('error_log', $log);
        try {
            $result = (new DiviPageLoader(self::schema()))->load(7, false);
        } finally {
            ini_set('error_log', (string) $previous);
        }

        self::assertSame('lit_unsupported', $result->get_error_code());
        self::assertStringContainsString('kein gültiges Block-Markup', $result->get_error_message());
        self::assertStringContainsString('divi parse of post 7 failed', (string) file_get_contents($log));
        unlink($log);
    }

    public function testTrashedEntriesCanBeReadButNotWritten(): void
    {
        self::givenPost(self::fixture('synthetic-basic.html'), ['post_status' => 'trash']);
        $loader = new DiviPageLoader(self::schema());

        self::assertInstanceOf(DiviPage::class, $loader->load(7, false));
        self::assertSame('lit_validation_failed', $loader->load(7, true)->get_error_code());
    }

    public function testWritableChecks(): void
    {
        $loader = new DiviPageLoader(self::schema(false));
        self::givenPost('');
        $empty = $loader->load(7, true);
        self::assertSame('lit_unsupported', $loader->writable($empty)->get_error_code());

        $loader = new DiviPageLoader(self::schema());
        self::givenPost("<!-- wp:paragraph -->\n<p>Gutenberg</p>\n<!-- /wp:paragraph -->");
        $gutenberg = $loader->load(7, true);
        self::assertFalse($gutenberg->isDiviLayout());
        self::assertStringContainsString('kein Divi-Layout', $loader->writable($gutenberg)->get_error_message());

        self::givenPost('', ['post_status' => 'future', 'post_date_gmt' => '2020-01-01 00:00:00']);
        $missed = $loader->load(7, true);
        self::assertTrue($missed->isDiviLayout());
        self::assertSame('lit_validation_failed', $loader->writable($missed)->get_error_code());
    }
}