<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Integrations\Media;

use Brain\Monkey\Functions;
use LIT\MCP\ChangeLog\ChangeLog;
use LIT\MCP\Integrations\Media\MediaDeleteAbility;
use LIT\MCP\Integrations\Media\MediaUsageFinder;
use LIT\MCP\Tests\Support\FakeChangeLog;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use RuntimeException;
use WP_Post;

final class MediaDeleteAbilityTest extends TestCase
{
    private const USAGE = [['post_id' => 5, 'title' => 'Team', 'post_type' => 'page', 'where' => 'featured', 'certainty' => 'sicher']];
    private const POSSIBLE = [['post_id' => 7, 'title' => 'Blog', 'post_type' => 'post', 'where' => 'content', 'certainty' => 'möglicherweise']];

    protected function setUp(): void
    {
        parent::setUp();
        Functions\when('get_post')->justReturn(new WP_Post(['ID' => 33, 'post_type' => 'attachment', 'post_status' => 'inherit', 'post_title' => 'Foto']));
        Functions\when('current_user_can')->justReturn(true);
        Functions\when('get_post_meta')->justReturn('2026/09/foto.jpg');
    }

    private function ability(array $usages, ChangeLog $log, bool $trash = false): MediaDeleteAbility
    {
        $finder = Mockery::mock(MediaUsageFinder::class);
        $finder->allows('usages')->with(33)->andReturn($usages);

        return new MediaDeleteAbility($finder, $log, static fn (): bool => $trash);
    }

    public function testConfirmationIsRequiredAndMentionsUsages(): void
    {
        Functions\expect('wp_delete_attachment')->never();

        $result = $this->ability(self::USAGE, FakeChangeLog::forbidden())->execute(['id' => 33]);

        self::assertSame('lit_confirm_required', $result->get_error_code());
        self::assertStringContainsString('endgültig', $result->get_error_message());
        self::assertStringContainsString('1 Stelle', $result->get_error_message());
        self::assertSame(self::USAGE, $result->get_error_data()['usages']);
    }

    public function testConfirmationMentionsTheTrashWhenMediaTrashIsOn(): void
    {
        $result = $this->ability([], FakeChangeLog::forbidden(), true)->execute(['id' => 33, 'confirm' => false]);

        self::assertSame('lit_confirm_required', $result->get_error_code());
        self::assertStringContainsString('Papierkorb', $result->get_error_message());
    }

    public function testUsedMediaNeedsForce(): void
    {
        Functions\expect('wp_delete_attachment')->never();

        $result = $this->ability(self::USAGE, FakeChangeLog::forbidden())->execute(['id' => 33, 'confirm' => true]);

        self::assertSame('lit_in_use', $result->get_error_code());
        self::assertSame(self::USAGE, $result->get_error_data()['usages']);
    }

    public function testPossibleUsageAlsoNeedsForce(): void
    {
        Functions\expect('wp_delete_attachment')->never();

        $result = $this->ability(self::POSSIBLE, FakeChangeLog::forbidden())->execute(['id' => 33, 'confirm' => true]);

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

    public function testForceDeletesUsedMedia(): void
    {
        Functions\expect('wp_delete_attachment')->once()->with(33, false)->andReturn(new WP_Post(['ID' => 33]));
        $log = new FakeChangeLog(50);

        $result = $this->ability(self::USAGE, $log)->execute(['id' => 33, 'confirm' => true, 'force' => true]);

        self::assertSame(['id' => '33', 'type' => 'attachment', 'action' => 'deleted', 'label' => 'Foto'], $result['changed'][0]);
        self::assertSame(50, $result['log_id']);
        self::assertSame(self::USAGE, $result['usages']);
        $log->assertRecorded([
            'ability' => 'lit/media-delete',
            'object_type' => 'attachment',
            'object_id' => '33',
            'summary' => 'Medium "Foto" gelöscht',
        ]);
    }

    public function testUnusedMediaGoesToTheTrashWhenMediaTrashIsOn(): void
    {
        Functions\expect('wp_delete_attachment')->once()->with(33, false)->andReturn(new WP_Post(['ID' => 33]));
        $log = new FakeChangeLog(51);

        $result = $this->ability([], $log, true)->execute(['id' => 33, 'confirm' => true]);

        self::assertSame('trashed', $result['changed'][0]['action']);
        $log->assertRecorded([
            'ability' => 'lit/media-delete',
            'object_type' => 'attachment',
            'object_id' => '33',
            'summary' => 'Medium "Foto" in den Papierkorb gelegt',
        ]);
    }

    public function testRefusedDeleteWithTheAttachmentIntactIsAWriteFailure(): void
    {
        Functions\when('get_post_meta')->justReturn('2026/09/foto.jpg');
        Functions\expect('wp_delete_attachment')->once()->andReturn(false);

        $result = $this->ability([], FakeChangeLog::forbidden())->execute(['id' => 33, 'confirm' => true]);

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

    public function testRefusedDeleteThatRemovedDataIsAPartialWrite(): void
    {
        $meta = '2026/09/foto.jpg';
        Functions\when('get_post_meta')->alias(static function () use (&$meta): string {
            return $meta;
        });
        Functions\expect('wp_delete_attachment')->once()->andReturnUsing(static function () use (&$meta) {
            $meta = '';

            return null;
        });
        $log = FakeChangeLog::partialsOnly();

        $result = $this->ability([], $log)->execute(['id' => 33, 'confirm' => true]);

        self::assertSame('lit_partial_write', $result->get_error_code());
        self::assertSame(33, $result->get_error_data()['attachment_id']);
        $log->assertPartials(['ability' => 'lit/media-delete', 'object_type' => 'attachment', 'object_id' => '33']);
    }

    public function testADatabaseErrorInTheUsageCheckRefusesWithoutForce(): void
    {
        Functions\when('get_post_meta')->justReturn('2026/09/foto.jpg');
        Functions\when('get_option')->justReturn(false);
        Functions\when('get_theme_mod')->justReturn(false);
        Functions\expect('wp_delete_attachment')->never();
        /** @var \Mockery\MockInterface&\wpdb $db */
        $db = Mockery::mock(\wpdb::class)->makePartial();
        $db->allows('get_results')->andReturn(null);
        $ability = new MediaDeleteAbility(
            new MediaUsageFinder(static fn (): array => [], $db),
            FakeChangeLog::forbidden(),
            static fn (): bool => false
        );

        $file = (string) tempnam(sys_get_temp_dir(), 'lit-mcp-log');
        $previous = ini_set('error_log', $file);
        try {
            $result = $ability->execute(['id' => 33, 'confirm' => true]);
        } finally {
            ini_set('error_log', (string) $previous);
            unlink($file);
        }

        self::assertSame('lit_in_use', $result->get_error_code());
        self::assertSame(MediaUsageFinder::FAILED_TITLE, $result->get_error_data()['usages'][0]['title']);
    }

    public function testChangeLogFailureIsOnlyAWarning(): void
    {
        Functions\expect('wp_delete_attachment')->once()->andReturn(new WP_Post(['ID' => 33]));
        $log = new FakeChangeLog(1, new RuntimeException('db down'));

        $file = (string) tempnam(sys_get_temp_dir(), 'lit-mcp-log');
        $previous = ini_set('error_log', $file);
        try {
            $result = $this->ability([], $log)->execute(['id' => 33, 'confirm' => true]);
        } finally {
            ini_set('error_log', (string) $previous);
            unlink($file);
        }

        self::assertSame('deleted', $result['changed'][0]['action']);
        self::assertNull($result['log_id']);
        self::assertCount(1, $result['warnings']);
        $log->assertRecorded([]);
    }

    public function testTrashedAttachmentIsRefused(): void
    {
        Functions\when('get_post')->justReturn(new WP_Post(['ID' => 33, 'post_type' => 'attachment', 'post_status' => 'trash']));
        Functions\expect('wp_delete_attachment')->never();

        $ability = $this->ability([], FakeChangeLog::forbidden());

        self::assertSame('lit_validation_failed', $ability->permission(['id' => 33])->get_error_code());
        self::assertSame('lit_validation_failed', $ability->execute(['id' => 33, 'confirm' => true])->get_error_code());
    }

    public function testChecksDeletePostOnTheAttachment(): void
    {
        Functions\when('current_user_can')->alias(static fn (string $cap, int $id): bool => ! ($cap === 'delete_post' && $id === 33));

        $result = $this->ability([], FakeChangeLog::forbidden())->permission(['id' => 33]);

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

    public function testIsDestructiveAndDescribesWhatTheUsageCheckMisses(): void
    {
        $ability = $this->ability([], FakeChangeLog::forbidden());

        self::assertSame(['readonly' => false, 'destructive' => true, 'idempotent' => false], $ability->annotations());
        self::assertFalse($ability->isDirect());
        foreach (['endgültig', 'Term-Meta', 'Benutzer-Meta', 'Pods', 'ACF', 'kommagetrennt', 'Optionen anderer Plugins'] as $needle) {
            self::assertStringContainsString($needle, $ability->description());
        }
    }
}