<?php

declare(strict_types=1);

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

use Brain\Monkey\Functions;
use LIT\MCP\Abilities\WriteFailed;
use LIT\MCP\ChangeLog\ChangeLog;
use LIT\MCP\Integrations\WordPress\Menus\MenuOperations;
use LIT\MCP\Integrations\WordPress\Menus\MenuSetItemsAbility;
use LIT\MCP\Integrations\WordPress\Menus\MenuTree;
use LIT\MCP\Integrations\WordPress\Menus\MenuWriter;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use RuntimeException;

final class MenuSetItemsAbilityTest extends TestCase
{
    use MenuFixtures;

    protected function setUp(): void
    {
        parent::setUp();
        Functions\when('wp_get_nav_menu_object')->justReturn((object) ['term_id' => 3, 'name' => 'Hauptmenü']);
        Functions\when('wp_get_nav_menu_items')->justReturn([self::item(10, 0, 'Home', 'custom', '/')]);
    }

    public function testItemsAndOperationsAreMutuallyExclusive(): void
    {
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), Mockery::mock(ChangeLog::class));

        self::assertSame('lit_validation_failed', $ability->execute(['menu_id' => 3])->get_error_code());
        self::assertSame(
            'lit_validation_failed',
            $ability->execute(['menu_id' => 3, 'items' => [], 'operations' => [['op' => 'remove', 'id' => 10]]])
                ->get_error_code()
        );
    }

    public function testUnknownMenuIsNotFound(): void
    {
        Functions\when('wp_get_nav_menu_object')->justReturn(false);
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), Mockery::mock(ChangeLog::class));

        self::assertSame('lit_not_found', $ability->execute(['menu_id' => 9, 'items' => []])->get_error_code());
    }

    public function testRemovalsNeedConfirmationAndNothingIsWritten(): void
    {
        Functions\expect('wp_update_nav_menu_item')->never();
        Functions\expect('wp_delete_post')->never();
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), Mockery::mock(ChangeLog::class));

        $result = $ability->execute(['menu_id' => 3, 'items' => []]);

        self::assertSame('lit_confirm_required', $result->get_error_code());
        self::assertSame([['id' => 10, 'title' => 'Home']], $result->get_error_data()['removals']);
    }

    public function testAnInvalidTreeWritesNothing(): void
    {
        Functions\when('wp_parse_url')->alias('parse_url');
        Functions\expect('wp_update_nav_menu_item')->never();
        Functions\expect('wp_delete_post')->never();
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), Mockery::mock(ChangeLog::class));

        $result = $ability->execute([
            'menu_id' => 3,
            'confirm' => true,
            'items' => [['id' => 10], ['type' => 'custom', 'url' => 'javascript:alert(1)', 'title' => 'X']],
        ]);

        self::assertSame('lit_validation_failed', $result->get_error_code());
        self::assertArrayHasKey('items.1', $result->get_error_data()['fields']);
    }

    public function testInvalidOperationsWriteNothing(): void
    {
        $writer = Mockery::mock(MenuWriter::class);
        $writer->expects('apply')->never();
        $ability = new MenuSetItemsAbility($writer, new MenuOperations(), Mockery::mock(ChangeLog::class));

        $result = $ability->execute(['menu_id' => 3, 'operations' => [['op' => 'move', 'id' => 99]]]);

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

    public function testAppliesAndReturnsTheTreeBeforeAndAfter(): void
    {
        $writer = Mockery::mock(MenuWriter::class);
        $writer->allows('plan')->andReturn(['errors' => [], 'removals' => [], 'warnings' => []]);
        $writer->expects('apply')->andReturn(['created' => 1, 'updated' => 1, 'removed' => 0]);
        $log = Mockery::mock(ChangeLog::class);
        $log->expects('record')->with('lit/menu-set-items', 'nav_menu', '3', Mockery::type('string'))->andReturn(21);

        $result = (new MenuSetItemsAbility($writer, new MenuOperations(), $log))->execute([
            'menu_id' => 3,
            'operations' => [['op' => 'add', 'item' => ['type' => 'custom', 'url' => '/blog', 'title' => 'Blog']]],
        ]);

        self::assertSame('Home', $result['previous_items'][0]['title']);
        self::assertSame(21, $result['log_id']);
        self::assertStringContainsString('1 neu, 1 geändert, 0 entfernt', $result['summary']);
    }

    public function testConfirmedRemovalsAreWrittenAndTheOldTreeIsReturned(): void
    {
        $writer = Mockery::mock(MenuWriter::class);
        $writer->allows('plan')->andReturn(
            ['errors' => [], 'removals' => [['id' => 10, 'title' => 'Home']], 'warnings' => []]
        );
        $writer->expects('apply')->with(3, [], Mockery::type('array'))
            ->andReturn(['created' => 0, 'updated' => 0, 'removed' => 1]);
        $log = Mockery::mock(ChangeLog::class);
        $log->allows('record')->andReturn(22);

        $result = (new MenuSetItemsAbility($writer, new MenuOperations(), $log))->execute(
            ['menu_id' => 3, 'items' => [], 'confirm' => true]
        );

        self::assertSame(10, $result['previous_items'][0]['id']);
        self::assertStringContainsString('0 neu, 0 geändert, 1 entfernt', $result['summary']);
    }

    public function testMenuGetOutputIsAcceptedAsInput(): void
    {
        $items = [self::item(10, 0, 'Start'), self::item(11, 10, 'Team'), self::item(12, 0, 'Kontakt', 'custom', '/k')];
        $items[0]->url = 'https://example.test/';
        Functions\when('wp_get_nav_menu_items')->justReturn($items);
        Functions\when('wp_update_nav_menu_item')->alias(static fn (int $menu, int $id): int => $id);
        Functions\expect('wp_delete_post')->never();
        $log = Mockery::mock(ChangeLog::class);
        $log->allows('record')->andReturn(23);

        $result = (new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), $log))->execute(
            ['menu_id' => 3, 'items' => MenuTree::build($items)]
        );

        self::assertStringContainsString('0 neu, 3 geändert, 0 entfernt', $result['summary']);
        self::assertSame($result['previous_items'], $result['items']);
    }

    public function testAWriteFailureIsPassedOnAsWriteFailed(): void
    {
        $writer = Mockery::mock(MenuWriter::class);
        $writer->allows('plan')->andReturn(['errors' => [], 'removals' => [], 'warnings' => []]);
        $writer->expects('apply')->andThrow(new WriteFailed('Menü nicht gespeichert.', true));
        $ability = new MenuSetItemsAbility($writer, new MenuOperations(), Mockery::mock(ChangeLog::class));

        $this->expectException(WriteFailed::class);
        $ability->execute(['menu_id' => 3, 'items' => [['id' => 10]]]);
    }

    public function testAChangeLogFailureIsOnlyAWarning(): void
    {
        $writer = Mockery::mock(MenuWriter::class);
        $writer->allows('plan')->andReturn(['errors' => [], 'removals' => [], 'warnings' => ['"X" ist nicht veröffentlicht']]);
        $writer->allows('apply')->andReturn(['created' => 0, 'updated' => 1, 'removed' => 0]);
        $log = Mockery::mock(ChangeLog::class);
        $log->allows('record')->andThrow(new RuntimeException('db down'));
        $file = (string) tempnam(sys_get_temp_dir(), 'lit');
        $errorLog = ini_set('error_log', $file);

        try {
            $result = (new MenuSetItemsAbility($writer, new MenuOperations(), $log))->execute(
                ['menu_id' => 3, 'items' => [['id' => 10]]]
            );
        } finally {
            ini_set('error_log', (string) $errorLog);
            unlink($file);
        }

        self::assertNull($result['log_id']);
        self::assertCount(2, $result['warnings']);
    }

    public function testPermissionNeedsThemeOptionRights(): void
    {
        Functions\when('current_user_can')->justReturn(false);
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), Mockery::mock(ChangeLog::class));

        self::assertSame('lit_forbidden', $ability->permission(['menu_id' => 3])->get_error_code());
    }

    public function testIsDestructiveAndDescribesWhenConfirmIsNeeded(): void
    {
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), Mockery::mock(ChangeLog::class));

        self::assertSame(['readonly' => false, 'destructive' => true, 'idempotent' => false], $ability->annotations());
        self::assertStringContainsString('confirm: true', $ability->description());
        self::assertStringContainsString('nur nötig', $ability->description());
    }
}