<?php

namespace App\Services;

use Illuminate\Http\Client\Response;
use Illuminate\Support\Facades\Http;
use RuntimeException;

class ShorakaService
{
    protected $baseUrl;
    protected $apiId;
    protected $secretKey;
    protected $timeout;

    public function __construct()
    {
        $this->baseUrl = rtrim(
            config('services.shoraka.base_url'),
            '/'
        );

        $this->apiId =
            config('services.shoraka.api_id');

        $this->secretKey =
            config('services.shoraka.secret_key');

        $this->timeout =
            config('services.shoraka.timeout', 60);
    }

    public function submitOrder(array $data): array
    {
        $payload = [
            'api_id' => $this->apiId,
            'product_type' =>
                $data['product_type'],
            'commodity_type' =>
                $data['commodity_type'],
            'ownership' =>
                $data['ownership'],
            'value_date' =>
                $data['value_date'],
            'order_currency' =>
                $data['order_currency'],
            'order_amount' =>
                $this->formatAmount(
                    $data['order_amount']
                ),
            'murabaha_amount' =>
                $this->formatAmount(
                    $data['murabaha_amount']
                ),
            'tenor' =>
                $data['tenor'],
            'tenor_other' =>
                $data['tenor_other'] ?? '',
            'tenor_other_unit' =>
                $data['tenor_other_unit'] ?? '',
            'order_type' =>
                $data['order_type'],
            'ownership_doc_no' =>
                $data['ownership_doc_no'] ?? '',
        ];

        $payload['signature'] =
            $this->makeSubmitSignature($payload);

        $response = Http::asForm()
            ->acceptJson()
            ->timeout($this->timeout)
            ->post(
                $this->baseUrl . '/api/submitorder',
                $payload
            );

        return $this->getJsonResponse($response);
    }

    protected function makeSubmitSignature(
        array $payload
    ): string {
        $values = [
            $this->secretKey,
            $this->apiId,
            $payload['product_type'],
            $payload['commodity_type'],
            $payload['ownership'],
            $payload['value_date'],
            $payload['order_currency'],
            $payload['order_amount'],
            $payload['murabaha_amount'],
            $payload['tenor'],
            $payload['tenor_other'],
            $payload['tenor_other_unit'],
            $payload['order_type'],
        ];

        return hash(
            'sha256',
            implode(';', $values)
        );
    }

    protected function formatAmount($amount): string
    {
        return number_format(
            (float) $amount,
            2,
            '.',
            ''
        );
    }

    protected function getJsonResponse(
        Response $response
    ): array {
        if (!$response->successful()) {
            throw new RuntimeException(
                'Shoraka request failed. HTTP ' .
                $response->status() .
                ': ' .
                $response->body()
            );
        }

        $data = $response->json();

        if (!is_array($data)) {
            throw new RuntimeException(
                'Shoraka returned an invalid response.'
            );
        }

        return $data;
    }
}