<?php

namespace App\Services\Wellnet;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Str;
use RuntimeException;

/**
 * Wellnet クレジットAPIサービス（CAFIS外部インターフェース）
 */
class WellnetCreditService
{
    private string $baseUrl;
    private string $companyCode;
    private string $authKey;
    private int $timeout;

    public function __construct()
    {
        $this->baseUrl = config('wellnet.credit_api.base_url');
        $this->companyCode = config('wellnet.credit_api.company_code');
        $this->authKey = config('wellnet.credit_api.auth_key');
        $this->timeout = config('wellnet.credit_api.timeout', 120);
    }

    /**
     * 与信照会要求（Authorize）
     *
     * @param string $memberNo 会員番号
     * @param int $payAmount 決済金額
     * @param int|null $cardNoSeq カード連番（未指定時はデフォルト使用）
     * @return array レスポンスデータ
     * @throws RuntimeException APIエラー時
     */
    public function authorize(string $memberNo, int $payAmount, ?int $cardNoSeq = null): array
    {
        $payload = [
            'requestId' => $this->generateRequestId(),
            'companyCode' => $this->companyCode,
            'authKey' => $this->authKey,
            'memberNo' => $memberNo,
            'payAmount' => $payAmount,
        ];

        if ($cardNoSeq !== null) {
            $payload['cardNoSeq'] = $cardNoSeq;
        }

        return $this->post('/api/authori', $payload);
    }

    /**
     * 売上確定要求（Capture）
     *
     * @param string $paymentNumber 決済番号
     * @return array レスポンスデータ
     * @throws RuntimeException APIエラー時
     */
    public function capture(string $paymentNumber): array
    {
        $payload = [
            'requestId' => $this->generateRequestId(),
            'companyCode' => $this->companyCode,
            'authKey' => $this->authKey,
            'paymentNumber' => $paymentNumber,
        ];

        return $this->post('/api/definiteTanking', $payload);
    }

    /**
     * 与信取消要求（全額取消）
     *
     * @param string $paymentNumber 決済番号
     * @return array レスポンスデータ
     * @throws RuntimeException APIエラー時
     */
    public function cancelAuthorize(string $paymentNumber): array
    {
        $payload = [
            'requestId' => $this->generateRequestId(),
            'companyCode' => $this->companyCode,
            'authKey' => $this->authKey,
            'paymentNumber' => $paymentNumber,
        ];

        try {
            return $this->post('/api/cancelAuthori', $payload);
        } catch (RuntimeException $e) {
            if ((int) $e->getCode() === 404) {
                return $this->post('/api/cancelPayment', $payload);
            }
            throw $e;
        }
    }

    /**
     * 差額返金要求（部分返金/全額返金）
     *
     * @param string $paymentNumber 決済番号
     * @param int $afterRefundPayAmount 返金後の残額（全額返金時は0）
     * @return array レスポンスデータ
     * @throws RuntimeException APIエラー時
     */
    public function refund(string $paymentNumber, int $afterRefundPayAmount): array
    {
        $payload = [
            'requestId' => $this->generateRequestId(),
            'companyCode' => $this->companyCode,
            'authKey' => $this->authKey,
            'paymentNumber' => $paymentNumber,
            'afterRefundPayAmount' => $afterRefundPayAmount,
        ];

        try {
            return $this->post('/api/refund', $payload);
        } catch (RuntimeException $e) {
            if ((int) $e->getCode() === 404) {
                return $this->post('/api/refundPayment', $payload);
            }
            throw $e;
        }
    }

    /**
     * HTTP POST送信
     *
     * @param string $path APIパス
     * @param array $payload リクエストボディ
     * @return array レスポンスデータ
     * @throws RuntimeException 通信エラー・APIエラー時
     */
    private function post(string $path, array $payload): array
    {
        $url = rtrim($this->baseUrl, '/') . $path;

        $response = Http::timeout($this->timeout)
            ->acceptJson()
            ->post($url, $payload);

        if (!$response->successful()) {
            $body = $response->json() ?? [];
            $errorDesc = $body['errorDescription'] ?? $body['result'] ?? 'HTTP ' . $response->status();
            throw new RuntimeException(
                'クレジットAPIエラー: ' . $errorDesc,
                $response->status()
            );
        }

        $data = $response->json();

        if (isset($data['result']) && $data['result'] !== 'SUCCESS') {
            throw new RuntimeException(
                'クレジットAPIエラー: ' . ($data['errorDescription'] ?? $data['result']),
                400
            );
        }

        return $data;
    }

    /**
     * リクエストID自動採番
     *
     * @return string 一意のリクエストID
     */
    private function generateRequestId(): string
    {
        return 'REQ-' . date('YmdHis') . '-' . Str::random(6);
    }
}