<?php

namespace Tests\Feature;

use App\Models\Transaction;
use GuzzleHttp\Psr7\Response as GuzzleResponse;

class SwishInitiateTest extends SwishTestCase
{
    public function test_it_registers_the_payment_with_swish_and_returns_an_app_switch_url(): void
    {
        $customer = $this->customer();
        $this->fakeSwishAcceptsWithToken('TOKEN123');

        $response = $this->postJson('/api/swish/initiate', [
            'customer_id'   => $customer->id,
            'amount'        => 250,
            'give_leftover' => true,
        ]);

        $response->assertOk();
        $this->assertStringStartsWith('swish://paymentrequest?token=TOKEN123', $response->json('swish_url'));

        $transaction = Transaction::firstWhere('payment_reference', $response->json('payment_reference'));
        $this->assertSame('pending', $transaction->status);
        $this->assertSame(250, $transaction->expected_amount);
        $this->assertNotEmpty($transaction->callback_identifier);
    }

    public function test_the_request_to_swish_has_the_fields_swish_handel_requires(): void
    {
        $customer = $this->customer();
        $this->fakeSwishAcceptsWithToken();

        $response = $this->postJson('/api/swish/initiate', [
            'customer_id'   => $customer->id,
            'amount'        => 250,
            'give_leftover' => false,
        ]);

        $body        = $this->lastSwishBody();
        $transaction = Transaction::firstWhere('payment_reference', $response->json('payment_reference'));

        $this->assertSame('1231181189', $body['payeeAlias']);
        $this->assertSame('SEK', $body['currency']);
        $this->assertSame('250.00', $body['amount']);
        $this->assertSame('https://swish.example.se/webhook/swish/kiosk', $body['callbackUrl']);
        $this->assertSame($transaction->payment_reference, $body['payeePaymentReference']);
        $this->assertSame($transaction->callback_identifier, $body['callbackIdentifier']);

        // The reference has to survive Swish's own validation
        $this->assertMatchesRegularExpression('/^[a-zA-Z0-9-]{1,35}$/', $body['payeePaymentReference']);
        $this->assertMatchesRegularExpression('/^[0-9a-zA-Z-]{32,36}$/', $body['callbackIdentifier']);
        $this->assertLessThanOrEqual(50, strlen($body['message']));
    }

    public function test_the_payment_request_is_a_put_to_the_instruction_uuid(): void
    {
        $customer = $this->customer();
        $this->fakeSwishAcceptsWithToken();

        $response = $this->postJson('/api/swish/initiate', [
            'customer_id'   => $customer->id,
            'amount'        => 100,
            'give_leftover' => false,
        ]);

        $transaction = Transaction::firstWhere('payment_reference', $response->json('payment_reference'));
        $request     = end($this->swishRequests)['request'];

        $this->assertSame('PUT', $request->getMethod());
        $this->assertSame(
            '/swish-cpcapi/api/v2/paymentrequests/' . $transaction->instruction_uuid,
            $request->getUri()->getPath()
        );
        $this->assertMatchesRegularExpression('/^[0-9A-F]{32}$/', $transaction->instruction_uuid);
    }

    public function test_it_fails_cleanly_when_swish_is_not_configured(): void
    {
        config(['app.swish_api_url' => '']);
        $customer = $this->customer();

        $response = $this->postJson('/api/swish/initiate', [
            'customer_id'   => $customer->id,
            'amount'        => 100,
            'give_leftover' => false,
        ]);

        $response->assertStatus(502);
        $this->assertSame('failed', Transaction::first()->status);
    }

    public function test_it_fails_when_swish_rejects_the_payment_request(): void
    {
        $customer = $this->customer();
        $this->fakeSwish(new GuzzleResponse(422, [], json_encode([
            ['errorCode' => 'PA02', 'errorMessage' => 'Amount value is missing or not a valid number'],
        ])));

        $response = $this->postJson('/api/swish/initiate', [
            'customer_id'   => $customer->id,
            'amount'        => 100,
            'give_leftover' => false,
        ]);

        $response->assertStatus(502);
        $this->assertSame('failed', Transaction::first()->status);
    }

    public function test_it_fails_when_swish_answers_without_a_token(): void
    {
        $customer = $this->customer();
        $this->fakeSwish(new GuzzleResponse(201));

        $this->postJson('/api/swish/initiate', [
            'customer_id'   => $customer->id,
            'amount'        => 100,
            'give_leftover' => false,
        ])->assertStatus(502);

        $this->assertSame('failed', Transaction::first()->status);
    }

    public function test_it_validates_its_input(): void
    {
        $customer = $this->customer();

        $this->postJson('/api/swish/initiate', [
            'customer_id'   => $customer->id,
            'amount'        => 0,
            'give_leftover' => false,
        ])->assertStatus(422);

        $this->postJson('/api/swish/initiate', [
            'customer_id'   => 999999,
            'amount'        => 100,
            'give_leftover' => false,
        ])->assertStatus(422);

        $this->assertSame(0, Transaction::count());
    }
}