<?php

declare(strict_types=1);

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

use Brain\Monkey\Functions;
use LIT\MCP\Abilities\Rev;
use LIT\MCP\Abilities\WriteFailed;
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\Support\FakeChangeLog;
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', '/')]);
    }

    /** The menu_rev of the items wp_get_nav_menu_items() currently returns (what lit/menu-get would show). */
    private static function rev(): string
    {
        return Rev::ofMenu(wp_get_nav_menu_items(3));
    }

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

        $stale = $ability->execute(['menu_id' => 3, 'menu_rev' => 'abcdefabcdef', 'items' => [['id' => 10]]]);
        $missing = $ability->execute(['menu_id' => 3, 'items' => [['id' => 10]]]);

        self::assertSame('lit_rev_mismatch', $stale->get_error_code());
        self::assertStringContainsString('lit/menu-get', $stale->get_error_data()['hint']);
        self::assertStringContainsString('Menü', $stale->get_error_message());
        self::assertSame('lit_rev_mismatch', $missing->get_error_code());
        self::assertContains('menu_rev', $ability->inputSchema()['required']);
        self::assertStringContainsString('menu_rev', $ability->description());
    }

    public function testTheResultCarriesTheNewMenuRev(): void
    {
        $writer = Mockery::mock(MenuWriter::class);
        $writer->allows('plan')->andReturn(['errors' => [], 'removals' => [], 'warnings' => []]);
        $writer->allows('apply')->andReturn(['created' => 0, 'updated' => 1, 'removed' => 0]);
        $log = new FakeChangeLog(30);

        $result = (new MenuSetItemsAbility($writer, new MenuOperations(), $log))->execute(
            ['menu_id' => 3, 'menu_rev' => self::rev(), 'items' => [['id' => 10]]]
        );

        self::assertSame(self::rev(), $result['menu_rev']);
    }

    public function testItemsAndOperationsAreMutuallyExclusive(): void
    {
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), FakeChangeLog::forbidden());

        self::assertSame('lit_validation_failed', $ability->execute(['menu_id' => 3, 'menu_rev' => self::rev()])->get_error_code());
        self::assertSame(
            'lit_validation_failed',
            $ability->execute(['menu_id' => 3, 'menu_rev' => self::rev(), '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(), FakeChangeLog::forbidden());

        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(), FakeChangeLog::forbidden());

        $result = $ability->execute(['menu_id' => 3, 'menu_rev' => self::rev(), '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(), FakeChangeLog::forbidden());

        $result = $ability->execute([
            'menu_id' => 3, 'menu_rev' => self::rev(),
            '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(), FakeChangeLog::forbidden());

        $result = $ability->execute(['menu_id' => 3, 'menu_rev' => self::rev(), '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 = new FakeChangeLog(21);

        $result = (new MenuSetItemsAbility($writer, new MenuOperations(), $log))->execute([
            'menu_id' => 3, 'menu_rev' => self::rev(),
            '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']);
        $log->assertRecorded(['ability' => 'lit/menu-set-items', 'object_type' => 'nav_menu', 'object_id' => '3']);
    }

    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 = new FakeChangeLog(22);

        $result = (new MenuSetItemsAbility($writer, new MenuOperations(), $log))->execute(
            ['menu_id' => 3, 'menu_rev' => self::rev(), '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\expect('wp_delete_post')->never();
        Functions\expect('wp_update_nav_menu_item')->never();
        $log = FakeChangeLog::forbidden();

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

        self::assertSame('Menü "Hauptmenü": keine Änderung.', $result['summary']);
        self::assertSame([], $result['changed']);
        self::assertNull($result['log_id']);
        self::assertSame($result['previous_items'], $result['items']);
    }

    public function testAllowUnpublishedIsPassedToThePlan(): void
    {
        $writer = Mockery::mock(MenuWriter::class);
        $writer->expects('plan')->with(Mockery::type('array'), Mockery::type('array'), true)
            ->andReturn(['errors' => ['items.0' => 'x'], 'removals' => [], 'warnings' => []]);
        $ability = new MenuSetItemsAbility($writer, new MenuOperations(), FakeChangeLog::forbidden());

        $result = $ability->execute(
            ['menu_id' => 3, 'menu_rev' => self::rev(), 'items' => [['type' => 'post', 'object_id' => 7]], 'allow_unpublished' => true]
        );

        self::assertSame('lit_validation_failed', $result->get_error_code());
        self::assertArrayHasKey('allow_unpublished', $ability->inputSchema()['properties']);
    }

    public function testADraftLinkIsRefusedWithoutTheFlagAndWrittenWithAWarningWithIt(): void
    {
        Functions\when('current_user_can')->justReturn(true);
        Functions\when('get_post')->justReturn(
            new \WP_Post(['ID' => 7, 'post_type' => 'page', 'post_status' => 'draft', 'post_title' => 'Neu'])
        );
        Functions\when('get_post_type')->justReturn('page');
        Functions\expect('wp_update_nav_menu_item')->once()->andReturn(60);
        $log = new FakeChangeLog(24);
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), $log);
        $input = ['menu_id' => 3, 'menu_rev' => self::rev(), 'operations' => [['op' => 'add', 'item' => ['type' => 'post', 'object_id' => 7]]]];

        $refused = $ability->execute($input);
        $allowed = $ability->execute($input + ['allow_unpublished' => true]);

        self::assertSame('lit_validation_failed', $refused->get_error_code());
        self::assertStringContainsString('allow_unpublished', $refused->get_error_data()['fields']['items.1']);
        self::assertStringContainsString('1 neu', $allowed['summary']);
        self::assertStringContainsString('sofort im Menü sichtbar', $allowed['warnings'][0]);
    }

    public function testAPrivatePostIsNeverLinked(): void
    {
        Functions\when('current_user_can')->justReturn(true);
        Functions\when('get_post')->justReturn(
            new \WP_Post(['ID' => 7, 'post_type' => 'page', 'post_status' => 'private', 'post_title' => 'Intern'])
        );
        Functions\expect('wp_update_nav_menu_item')->never();
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), FakeChangeLog::forbidden());

        $result = $ability->execute([
            'menu_id' => 3, 'menu_rev' => self::rev(),
            'allow_unpublished' => true,
            'operations' => [['op' => 'add', 'item' => ['type' => 'post', 'object_id' => 7]]],
        ]);

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

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

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

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

        try {
            $ability->execute(['menu_id' => 3, 'menu_rev' => self::rev(), 'items' => [['id' => 10]]]);
            self::fail('WriteFailed expected');
        } catch (WriteFailed $e) {
            self::assertFalse($e->rolledBack);
        }
        $log->assertPartials(['ability' => 'lit/menu-set-items', 'object_type' => 'nav_menu', 'object_id' => '3']);
    }

    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 = new FakeChangeLog(1, 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, 'menu_rev' => self::rev(), '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(), FakeChangeLog::forbidden());

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

    public function testIsDestructiveAndDescribesWhenConfirmIsNeeded(): void
    {
        $ability = new MenuSetItemsAbility(new MenuWriter(), new MenuOperations(), FakeChangeLog::forbidden());

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