package com.mydreamjob.auth.sms;

import com.aliyun.dysmsapi20170525.Client;
import com.aliyun.dysmsapi20170525.models.SendSmsRequest;
import com.aliyun.dysmsapi20170525.models.SendSmsResponse;
import com.aliyun.teautil.models.RuntimeOptions;
import com.mydreamjob.common.exception.BusinessException;
import com.mydreamjob.common.exception.ErrorCode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Set;

/** SDK 返回 OK 只代表网关受理，不代表手机已收到；禁止自动重试非幂等发送。 */
public final class AliyunSmsCodeSender implements SmsCodeSender {
    private static final Logger LOG = LoggerFactory.getLogger(AliyunSmsCodeSender.class);
    private static final Set<String> PURPOSES = Set.of("login", "password-set", "password-reset", "company-register");
    private final Client client;
    private final String signName;
    private final String templateCode;
    private final int connectTimeoutMs;
    private final int readTimeoutMs;

    public AliyunSmsCodeSender(Client client, AliyunSmsProperties properties) {
        properties.validateForSending();
        this.client = client;
        this.signName = properties.getSignName();
        this.templateCode = properties.getTemplateCode();
        this.connectTimeoutMs = properties.getConnectTimeoutMs();
        this.readTimeoutMs = properties.getReadTimeoutMs();
    }

    @Override
    public void sendVerificationCode(String phone, String purpose, String code) {
        if (phone == null || !phone.matches("[0-9]{11}") || purpose == null || !PURPOSES.contains(purpose)
                || code == null || !code.matches("[0-9]{6}")) {
            throw new BusinessException(ErrorCode.BAD_REQUEST, "invalid SMS request");
        }
        SendSmsRequest request = new SendSmsRequest().setPhoneNumbers(phone).setSignName(signName)
                .setTemplateCode(templateCode).setTemplateParam("{\"code\":\"" + code + "\"}");
        RuntimeOptions runtime = new RuntimeOptions().setAutoretry(false)
                .setConnectTimeout(connectTimeoutMs).setReadTimeout(readTimeoutMs);
        SendSmsResponse response;
        try {
            response = client.sendSmsWithOptions(request, runtime);
        } catch (Exception ignored) {
            if (ignored instanceof InterruptedException) Thread.currentThread().interrupt();
            // SDK 异常可能包含请求绑定值，既不透传原因也不输出堆栈。
            LOG.warn("Aliyun SMS gateway call failed");
            throw new BusinessException(ErrorCode.SMS_SEND_FAILED);
        }
        if (response == null || response.getBody() == null || response.getStatusCode() == null
                || response.getStatusCode() != 200 || !"OK".equals(response.getBody().getCode())) {
            LOG.warn("Aliyun SMS gateway did not accept request");
            throw new BusinessException(ErrorCode.SMS_SEND_FAILED);
        }
    }
}