<?php

namespace Tests\Unit;

use App\Services\PayPlus;
use Tests\TestCase;

class PayPlusServiceTest extends TestCase
{
    /** @test */
    public function it_builds_payout_sign_with_flattened_sorted_payload()
    {
        $service = new PayPlus([
            'appKey' => '123456',
        ]);

        $payload = [
            'k2' => [1, 2],
            'empty' => '',
            'k3' => [
                'b1' => 'test1',
                'a2' => 'test2',
            ],
            'k1' => 1,
            'null_value' => null,
        ];

        $sign = $service->signPayoutPayload($payload);

        $this->assertSame(
            hash('sha256', 'k1=1&k2=[1,2]&k3_a2=test2&k3_b1=test1' . '123456'),
            $sign
        );
    }

    /** @test */
    public function it_formats_payout_notify_amounts_to_four_decimals_when_verifying_signature()
    {
        $service = new PayPlus([
            'appKey' => '123456',
        ]);

        $payload = [
            'transaction_id' => 'T100',
            'reference_id' => 'TX100',
            'status' => 'PAID',
            'timestamp' => 162856465000,
            'payout_amount' => 10,
            'source_amount' => '11',
            'payout_fee' => 1,
        ];

        $signString = 'payout_amount=10.0000&payout_fee=1.0000&reference_id=TX100'
            . '&source_amount=11.0000&status=PAID&timestamp=162856465000&transaction_id=T100';

        $this->assertTrue($service->verifyPayoutSignature(
            $payload,
            hash('sha256', $signString . '123456')
        ));
    }

    /** @test */
    public function it_encrypts_and_decrypts_component_delta_with_aes_gcm()
    {
        $service = new PayPlus([]);
        $aesKey = str_repeat('01', 32);
        $iv = str_repeat('02', 12);
        $payload = '{"hello":"payplus"}';

        $encrypted = $service->encryptComponentDelta($payload, $aesKey, $iv);
        $decrypted = $service->decryptComponentDelta($encrypted, $aesKey, $iv);

        $this->assertSame($payload, $decrypted);
    }

    /** @test */
    public function it_builds_beneficiary_payload_with_safe_defaults()
    {
        $service = new PayPlus([]);

        $payload = $service->buildBeneficiaryPayload([
            'user_id' => 10001,
            'email' => '',
            'phone' => '',
            'first_name' => '',
            'last_name' => '',
        ], 1234567890);

        $this->assertSame('10001', $payload['payee_id']);
        $this->assertSame('en', $payload['language']);
        $this->assertSame('US', $payload['country']);
        $this->assertSame('+1-0000000000', $payload['phone']);
        $this->assertSame('unknown10001@example.com', $payload['email']);
        $this->assertSame('unknown', $payload['first_name']);
        $this->assertSame('user', $payload['last_name']);
        $this->assertSame(1234567890, $payload['timestamp']);
    }

    /** @test */
    public function it_keeps_only_english_letters_for_beneficiary_names()
    {
        $service = new PayPlus([]);

        $payload = $service->buildBeneficiaryPayload([
            'user_id' => 10002,
            'first_name' => '张San-123',
            'last_name' => '李User_456',
        ], 1234567890);

        $this->assertSame('San', $payload['first_name']);
        $this->assertSame('User', $payload['last_name']);

        $payload = $service->buildBeneficiaryPayload([
            'user_id' => 10003,
            'first_name' => '张三123',
            'last_name' => '456-',
        ], 1234567890);

        $this->assertSame('unknown', $payload['first_name']);
        $this->assertSame('user', $payload['last_name']);
    }
}