<?php

namespace App\Tests\Subscription;

use App\Config\Entity\SiteConfig;
use App\Payment\Entity\Payment;
use App\Subscription\Entity\SubscriptionPeriod;
use App\Subscription\Entity\SubscriptionPlan;
use App\Subscription\Service\SubscriptionTaxCalculator;
use App\Tests\ApiTestCase;

/**
 * قیمت دورهٔ اشتراک خالص است و مالیات رویش اضافه می‌شود — برخلاف نوبت که مبلغش
 * شامل مالیات است. پس مبلغِ پرداختی همیشه ≥ قیمت پلن است، و مبلغ از سمت سرور
 * محاسبه می‌شود نه از بدنهٔ درخواست.
 */
class SubscriptionTaxTest extends ApiTestCase
{
    private function setConfig(string $key, string $value): void
    {
        $cfg = $this->em->getRepository(SiteConfig::class)->findOneBy(['configKey' => $key]);
        if ($cfg === null) {
            $this->em->persist(new SiteConfig($key, $value));
        } else {
            $cfg->setValue($value);
        }
        $this->em->flush();
    }

    private function enableTax(string $percent = '10'): void
    {
        $this->setConfig('tax_enabled', '1');
        $this->setConfig('tax_percent', $percent);
    }

    private function makePeriod(int $priceRials): SubscriptionPeriod
    {
        $plan = new SubscriptionPlan('plan-' . bin2hex(random_bytes(4)), 5, 1, []);
        $this->em->persist($plan);

        $period = new SubscriptionPeriod($plan, 'یک ماهه', 1, $priceRials);
        $this->em->persist($period);
        $this->em->flush();

        return $period;
    }

    private function calculator(): SubscriptionTaxCalculator
    {
        return static::getContainer()->get(SubscriptionTaxCalculator::class);
    }

    public function testTaxIsAddedOnTopOfTheNetPrice(): void
    {
        $this->enableTax('10');
        $calc = $this->calculator();

        self::assertSame(29_000, $calc->taxOf(290_000));
        self::assertSame(319_000, $calc->payableOf(290_000), 'مالیات باید اضافه شود، نه استخراج');
    }

    public function testDisabledTaxLeavesThePriceUntouched(): void
    {
        $this->setConfig('tax_enabled', '0');
        $this->setConfig('tax_percent', '10');
        $calc = $this->calculator();

        self::assertSame(0.0, $calc->percent());
        self::assertSame(0, $calc->taxOf(290_000));
        self::assertSame(290_000, $calc->payableOf(290_000));
    }

    public function testFreePeriodStaysFree(): void
    {
        $this->enableTax('10');

        self::assertSame(0, $this->calculator()->payableOf(0));
    }

    public function testPublicPlanListExposesTaxPerPeriod(): void
    {
        $this->enableTax('10');
        $this->makePeriod(290_000);

        // این روت پشت firewall نشسته (بر خلاف چیزی که docs می‌گوید)، پس با توکن زده می‌شود.
        $this->authJson('GET', '/api/v1/subscription/plans', $this->createUser());
        self::assertSame(200, $this->responseCode());

        $periods = [];
        foreach (json_decode((string) $this->client->getResponse()->getContent(), true)['data'] as $plan) {
            foreach ($plan['periods'] ?? [] as $period) {
                $periods[] = $period;
            }
        }

        self::assertNotEmpty($periods, 'حداقل یک دوره باید برگردد');
        foreach ($periods as $period) {
            self::assertArrayHasKey('tax_percent', $period);
            self::assertArrayHasKey('tax_rials', $period);
            self::assertArrayHasKey('payable_rials', $period);
            self::assertSame(
                $period['price_rials'] + $period['tax_rials'],
                $period['payable_rials'],
            );
        }
    }

    public function testPaymentChargesPricePlusTaxAndIgnoresTheClientAmount(): void
    {
        $this->enableTax('10');
        $period = $this->makePeriod(290_000);
        $user   = $this->createUser(['ROLE_DOCTOR']);
        $doctor = new \App\Doctor\Entity\Doctor($user, 'دکتر مالیات');
        $this->em->persist($doctor);
        $this->em->flush();

        $this->authJson('POST', '/api/v1/subscription-payment', $user, [
            'gateway'      => 'mellat',
            'period_uuid'  => $period->getUuid(),
            // مبلغِ دستکاری‌شده باید نادیده گرفته شود.
            'amount_rials' => 1_000,
        ]);
        self::assertSame(200, $this->responseCode());

        $body = json_decode((string) $this->client->getResponse()->getContent(), true)['data'];
        self::assertSame(290_000, $body['price_rials']);
        self::assertSame(29_000, $body['tax_rials']);
        self::assertSame(319_000, $body['payable_rials']);

        $payment = $this->em->getRepository(Payment::class)->findOneBy(['uuid' => $body['payment_uuid']]);
        self::assertSame(319_000, $payment->getAmountRials(), 'مبلغ ذخیره‌شده باید شامل مالیات باشد');
    }

    public function testPaymentRejectsAnUnknownPeriod(): void
    {
        $this->enableTax('10');
        $user   = $this->createUser(['ROLE_DOCTOR']);
        $doctor = new \App\Doctor\Entity\Doctor($user, 'دکتر بدون دوره');
        $this->em->persist($doctor);
        $this->em->flush();

        $this->authJson('POST', '/api/v1/subscription-payment', $user, [
            'gateway'      => 'mellat',
            'period_uuid'  => 'does-not-exist',
            'amount_rials' => 290_000,
        ]);

        self::assertSame(422, $this->responseCode());
    }
}