<?php

namespace App\Tests\ClinicService;

use App\Clinic\Entity\Clinic;
use App\ClinicService\Entity\CatalogCategory;
use App\ClinicService\Entity\CatalogCategoryInclude;
use App\ClinicService\Entity\ItemGroup;
use App\ClinicService\Entity\ServiceItem;
use App\ClinicService\Entity\ServiceSection;
use App\ClinicService\Service\CategoryClosureResolver;
use App\ClinicService\Service\ServiceSelectionValidator;
use App\Shared\Exception\AppException;
use App\Tests\ApiTestCase;

/**
 * دسته‌بندی سراسری کلینیک و رابطهٔ «شامل بودن».
 *
 * «تمام بدن» شامل «دست» و «پا» است — و این با `parent` درختی گفتنی نیست، چون «دست»
 * می‌تواند هم‌زمان زیر «تمام بدن» و زیر «اندام فوقانی» باشد. پس گراف است، نه درخت.
 */
class CategoryClosureTest extends ApiTestCase
{
    private CategoryClosureResolver $closure;
    private Clinic $clinic;
    private ServiceSection $section;

    protected function setUp(): void
    {
        parent::setUp();

        $this->closure = new CategoryClosureResolver(
            $this->em->getRepository(CatalogCategoryInclude::class),
        );

        $user = $this->createUser(['ROLE_USER', 'ROLE_CLINIC']);
        $this->clinic = new Clinic($user);
        $this->clinic->setName('کلینیک دسته‌بندی');
        $this->em->persist($this->clinic);
        $this->em->flush();

        $this->section = new ServiceSection('clinic', (int) $this->clinic->getId(), 'لیزر');
        $this->em->persist($this->section);
        $this->em->flush();
    }

    private function category(string $name): CatalogCategory
    {
        $category = new CatalogCategory('clinic', (int) $this->clinic->getId(), $name);
        $this->em->persist($category);
        $this->em->flush();

        return $category;
    }

    private function includes(CatalogCategory $parent, CatalogCategory $child): void
    {
        $this->closure->assertNoCycle($parent, $child);
        $this->em->persist(new CatalogCategoryInclude($parent, $child));
        $this->em->flush();
    }

    private function item(string $name, ?CatalogCategory $category = null): ServiceItem
    {
        $item = new ServiceItem($this->section, $name, 5_000_000);
        $item->setDurationMinutes(30)->setCatalogCategory($category);
        $this->em->persist($item);
        $this->em->flush();

        return $item;
    }

    // ── ✅ موفق ──────────────────────────────────────────────────────────────

    public function testAWholeBodyCategoryIncludesTheAreasUnderIt(): void
    {
        $whole = $this->category('تمام بدن');
        $hand  = $this->category('دست');
        $foot  = $this->category('پا');

        $this->includes($whole, $hand);
        $this->includes($whole, $foot);

        $descendants = $this->closure->descendants($whole);

        self::assertContains((int) $hand->getId(), $descendants);
        self::assertContains((int) $foot->getId(), $descendants);
        self::assertCount(2, $descendants);
    }

    public function testContainmentIsTransitive(): void
    {
        $whole = $this->category('تمام بدن');
        $lower = $this->category('نیم‌تنهٔ پایین');
        $foot  = $this->category('پا');

        $this->includes($whole, $lower);
        $this->includes($lower, $foot);

        // بدون بستار گذرا، کلینیک مجبور بود همهٔ جفت‌ها را دستی بنویسد.
        self::assertContains((int) $foot->getId(), $this->closure->descendants($whole));
        self::assertTrue($this->closure->overlaps($whole, $foot));
    }

    public function testACategoryCanSitUnderTwoParentsWhichATreeCouldNotExpress(): void
    {
        $whole = $this->category('تمام بدن');
        $upper = $this->category('اندام فوقانی');
        $hand  = $this->category('دست');

        $this->includes($whole, $hand);
        $this->includes($upper, $hand);

        self::assertContains((int) $hand->getId(), $this->closure->descendants($whole));
        self::assertContains((int) $hand->getId(), $this->closure->descendants($upper));
    }

    // ── ❌ خطا ───────────────────────────────────────────────────────────────

    public function testACycleIsRefused(): void
    {
        $whole = $this->category('تمام بدن');
        $hand  = $this->category('دست');

        $this->includes($whole, $hand);

        // «دست شامل تمام بدن» حلقه می‌بندد و پیمایش را تا سرریز استک می‌برد.
        $this->expectException(AppException::class);
        $this->closure->assertNoCycle($hand, $whole);
    }

    public function testACategoryCannotIncludeItself(): void
    {
        $whole = $this->category('تمام بدن');

        $this->expectException(\InvalidArgumentException::class);
        new CatalogCategoryInclude($whole, $whole);
    }

    // ── ⚠️ مرزی ──────────────────────────────────────────────────────────────

    public function testACategoryWithNoEdgesHasNoDescendants(): void
    {
        self::assertSame([], $this->closure->descendants($this->category('تک‌افتاده')));
    }

    // ── تعارض انتخاب ─────────────────────────────────────────────────────────

    public function testSelectingAnAreaTogetherWithTheWholeBodyIsRejected(): void
    {
        $whole = $this->category('تمام بدن');
        $hand  = $this->category('دست');
        $this->includes($whole, $hand);

        $wholeItem = $this->item('لیزر تمام بدن', $whole);
        $handItem  = $this->item('لیزر دست', $hand);

        $result = $this->validator()->validate([$wholeItem, $handItem], []);

        self::assertFalse($result['valid']);
        self::assertSame('category_overlap', $result['errors'][0]['code']);
        self::assertStringContainsString('تمام بدن', $result['errors'][0]['message']);
        self::assertStringContainsString('دست', $result['errors'][0]['message']);
    }

    public function testTwoUnrelatedAreasAreFine(): void
    {
        $hand = $this->category('دست');
        $foot = $this->category('پا');

        // هیچ‌کدام دیگری را در بر نمی‌گیرد، پس با هم انتخاب می‌شوند.
        $result = $this->validator()->validate(
            [$this->item('لیزر دست', $hand), $this->item('لیزر پا', $foot)],
            [],
        );

        self::assertTrue($result['valid'], json_encode($result['errors'], JSON_UNESCAPED_UNICODE));
    }

    public function testItemsWithoutACategoryAreLeftAlone(): void
    {
        $result = $this->validator()->validate(
            [$this->item('مشاوره'), $this->item('ویزیت')],
            [],
        );

        self::assertTrue($result['valid']);
    }

    private function validator(): ServiceSelectionValidator
    {
        return new ServiceSelectionValidator(
            $this->em->getRepository(\App\ClinicService\Entity\ItemGroupMember::class),
            $this->em->getRepository(\App\ClinicService\Entity\ServiceItemRelation::class),
            $this->em->getRepository(\App\ClinicService\Entity\ServiceBranchOverride::class),
            new \App\ClinicService\Service\DurationCalculator(),
            $this->closure,
        );
    }
}