<?php

declare(strict_types=1);

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

use Brain\Monkey\Actions;
use Brain\Monkey\Functions;
use LIT\MCP\Abilities\Errors;
use LIT\MCP\Abilities\Rev;
use LIT\MCP\Abilities\WriteFailed;
use LIT\MCP\ChangeLog\ChangeLog;
use LIT\MCP\Integrations\WordPress\Content\ContentCreateAbility;
use LIT\MCP\Integrations\WordPress\Content\PostWriter;
use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use Mockery\MockInterface;
use RuntimeException;
use WP_Post;

final class ContentCreateAbilityTest extends TestCase
{
    private const INPUT = ['post_type' => 'lit_person', 'title' => 'Anna', 'fields' => ['role' => 'Leitung']];

    private function schema(): ContentSchema
    {
        Functions\when('get_post_type_object')->justReturn((object) ['cap' => (object) ['create_posts' => 'edit_pages']]);
        Functions\when('current_user_can')->justReturn(true);
        $schema = Mockery::mock(ContentSchema::class);
        $schema->allows('isManaged')->andReturn(true);

        return $schema;
    }

    /** @return PostWriter&MockInterface */
    private function writer(array $warnings = []): PostWriter
    {
        $writer = Mockery::mock(PostWriter::class);
        $writer->allows('prepare')->andReturn(['fields' => ['role' => 'Leitung'], 'terms' => [], 'warnings' => $warnings]);
        $writer->allows('postData')->andReturn(['post_title' => 'Anna']);
        Functions\when('get_current_user_id')->justReturn(3);

        return $writer;
    }

    private function execute(PostWriter $writer, ChangeLog $log): WriteFailed
    {
        try {
            (new ContentCreateAbility($this->schema(), $writer, $log))->execute(self::INPUT);
        } catch (WriteFailed $e) {
            return $e;
        }

        self::fail('WriteFailed expected');
    }

    private function stubResultLinks(): WP_Post
    {
        $post = new WP_Post(['ID' => 42, 'post_title' => 'Anna', 'post_type' => 'lit_person']);
        Functions\when('get_post')->justReturn($post);
        Functions\when('get_preview_post_link')->justReturn('https://kunde.de/?p=42&preview=true');
        Functions\when('get_edit_post_link')->justReturn('https://kunde.de/wp-admin/post.php?post=42&action=edit');

        return $post;
    }

    public function testInvalidInputWritesNothing(): void
    {
        $writer = Mockery::mock(PostWriter::class);
        $writer->allows('prepare')->andReturn(Errors::invalidInput('ungültig', ['fields.role' => 'Pflichtfeld fehlt.']));
        Functions\expect('wp_insert_post')->never();

        $result = (new ContentCreateAbility($this->schema(), $writer, Mockery::mock(ChangeLog::class)))
            ->execute(['post_type' => 'lit_person', 'title' => 'Anna']);

        self::assertSame('lit_validation_failed', $result->get_error_code());
    }

    public function testCreatesADraftWritesExtrasLogsAndReturnsAToolResult(): void
    {
        $schema = $this->schema();
        $prepared = ['fields' => ['role' => 'Leitung'], 'terms' => [], 'warnings' => ['w']];
        $input = self::INPUT;
        $writer = Mockery::mock(PostWriter::class);
        $writer->allows('prepare')->with('lit_person', $input, true)->andReturn($prepared);
        $writer->allows('postData')->andReturn(['post_title' => 'Anna']);
        $writer->expects('writeExtras')->with(42, 'lit_person', $prepared, $input);
        Functions\when('get_current_user_id')->justReturn(3);
        Functions\expect('wp_insert_post')->once()->with([
            'post_title' => 'Anna',
            'post_type' => 'lit_person',
            'post_status' => 'draft',
            'post_author' => 3,
        ], true)->andReturn(42);
        Actions\expectDone('lit_mcp_after_save')->once()->with(42, 'lit/content-create', $input);
        $post = $this->stubResultLinks();
        $log = Mockery::mock(ChangeLog::class);
        $log->expects('record')->with('lit/content-create', 'lit_person', '42', 'Entwurf "Anna" angelegt')->andReturn(7);

        $result = (new ContentCreateAbility($schema, $writer, $log))->execute($input);

        self::assertTrue($result['ok']);
        self::assertSame([['id' => '42', 'type' => 'lit_person', 'action' => 'created', 'label' => 'Anna']], $result['changed']);
        self::assertSame(7, $result['log_id']);
        self::assertSame(['w'], $result['warnings']);
        self::assertStringContainsString('Entwurf', $result['summary']);
        self::assertSame(Rev::ofPost($post), $result['rev']);
    }

    public function testFailingExtrasDeleteCreatedTermsAndTheNewDraft(): void
    {
        $writer = $this->writer();
        $writer->expects('writeExtras')->andThrow(new RuntimeException('Pods could not save the fields.'));
        $writer->expects('deleteCreatedTerms');
        Functions\when('wp_insert_post')->justReturn(42);
        Functions\expect('wp_delete_post')->once()->with(42, true)->andReturn(new WP_Post(['ID' => 42]));
        Actions\expectDone('lit_mcp_after_save')->never();
        $log = Mockery::mock(ChangeLog::class);
        $log->expects('record')->never();

        $failure = $this->execute($writer, $log);

        self::assertTrue($failure->rolledBack);
        self::assertStringContainsString('Pods could not save the fields.', $failure->getMessage());
        self::assertSame('lit_write_failed', $failure->toError()->get_error_code());
    }

    public function testADraftThatCannotBeDeletedIsAPartialWriteAndLogged(): void
    {
        $writer = $this->writer();
        $writer->expects('writeExtras')->andThrow(new RuntimeException('meta kaputt'));
        $writer->expects('deleteCreatedTerms');
        Functions\when('wp_insert_post')->justReturn(42);
        Functions\when('wp_delete_post')->justReturn(false);
        $log = Mockery::mock(ChangeLog::class);
        $log->expects('recordPartial')
            ->with('lit/content-create', 'lit_person', '42', Mockery::type('string'))
            ->andReturn(9);

        $failure = $this->execute($writer, $log);

        self::assertFalse($failure->rolledBack);
        self::assertSame(42, $failure->postId);
        self::assertStringContainsString('Eintrag 42', $failure->toError()->get_error_message());
    }

    public function testLeftoverCreatedTermsMakeItAPartialWrite(): void
    {
        $writer = $this->writer();
        $writer->expects('writeExtras')->andThrow(new RuntimeException('meta kaputt'));
        $writer->expects('deleteCreatedTerms')->andThrow(new RuntimeException('term 15 bleibt'));
        Functions\when('wp_insert_post')->justReturn(42);
        Functions\when('wp_delete_post')->justReturn(new WP_Post(['ID' => 42]));
        $log = Mockery::mock(ChangeLog::class);
        $log->expects('recordPartial');

        $failure = $this->execute($writer, $log);

        self::assertFalse($failure->rolledBack);
        self::assertStringContainsString('term 15 bleibt', $failure->getMessage());
    }

    public function testAnInsertThatThrowsIsAPartialWriteWithoutId(): void
    {
        $writer = $this->writer();
        Functions\when('wp_insert_post')->alias(static function (): never {
            throw new RuntimeException('save_post hook kaputt');
        });
        $log = Mockery::mock(ChangeLog::class);
        $log->expects('recordPartial')
            ->with('lit/content-create', 'lit_person', '', Mockery::type('string'))
            ->andReturn(9);

        $failure = $this->execute($writer, $log);

        self::assertFalse($failure->rolledBack);
        self::assertNull($failure->postId);
        self::assertSame('lit_partial_write', $failure->toError()->get_error_code());
    }

    public function testFailuresAfterTheWriteOnlyAddWarnings(): void
    {
        $writer = $this->writer(['w']);
        $writer->allows('writeExtras');
        Functions\when('wp_insert_post')->justReturn(42);
        $this->stubResultLinks();
        Actions\expectDone('lit_mcp_after_save')->once()->whenHappen(static function (): void {
            throw new RuntimeException('listener kaputt');
        });
        $log = Mockery::mock(ChangeLog::class);
        $log->expects('record')->andThrow(new RuntimeException('db weg'));
        $file = (string) tempnam(sys_get_temp_dir(), 'lit-mcp-log');
        $previous = ini_set('error_log', $file);

        try {
            $result = (new ContentCreateAbility($this->schema(), $writer, $log))->execute(self::INPUT);
        } finally {
            ini_set('error_log', (string) $previous);
        }

        self::assertTrue($result['ok']);
        self::assertNull($result['log_id']);
        self::assertCount(3, $result['warnings']);
        self::assertStringContainsString('listener kaputt', (string) file_get_contents($file));
        self::assertStringContainsString('db weg', (string) file_get_contents($file));
        unlink($file);
    }

    public function testStatusIsNotAnInputAndPermissionNeedsCreateRights(): void
    {
        $schema = $this->schema();
        $ability = new ContentCreateAbility($schema, Mockery::mock(PostWriter::class), Mockery::mock(ChangeLog::class));

        self::assertArrayNotHasKey('status', $ability->inputSchema()['properties']);
        self::assertFalse($ability->inputSchema()['additionalProperties']);
        self::assertTrue($ability->permission(['post_type' => 'page']));

        Functions\when('current_user_can')->justReturn(false);
        self::assertSame('lit_forbidden', $ability->permission(['post_type' => 'page'])->get_error_code());
    }
}