From 288b52d58a6611ce28ad405e2362b864327c664b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EC=84=9C=EC=A0=9C=EA=B2=BD?= <seojk0315@naver.com>
Date: Fri, 27 Feb 2026 21:01:51 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=EA=B0=80=EC=9E=85=EB=90=9C=20=EC=86=8C?=
 =?UTF-8?q?=EC=85=9C=20=EA=B3=84=EC=A0=95=20=EC=9E=88=EB=8A=94=20=EA=B2=BD?=
 =?UTF-8?q?=EC=9A=B0=20=EC=B2=98=EB=A6=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/hooks/auth/useEmailVerification.ts | 18 ++++++++++++++++++
 src/types/auth/auth.ts                 |  2 ++
 2 files changed, 20 insertions(+)

diff --git a/src/hooks/auth/useEmailVerification.ts b/src/hooks/auth/useEmailVerification.ts
index 28cf67c..fe2aaf8 100644
--- a/src/hooks/auth/useEmailVerification.ts
+++ b/src/hooks/auth/useEmailVerification.ts
@@ -66,11 +66,29 @@ export const useEmailVerification = ({
     stop();
   }, [stop]);
 
+  const PROVIDER_NAME: Record<string, string> = {
+    GOOGLE: "구글",
+    KAKAO: "카카오",
+    NAVER: "네이버",
+  };
+
   const sendVerificationEmail = (email: string, successMessage: string) => {
     activeSendCode.mutate(
       { email },
       {
         onSuccess: (data) => {
+          const { isProviderLinked, providerTypes } = data.data;
+
+          if (isProviderLinked) {
+            const providerNames = providerTypes
+              .map((type) => PROVIDER_NAME[type])
+              .join(", ");
+            toast.error("이미 소셜 로그인으로 가입된 이메일입니다.", {
+              description: `${providerNames}계정으로 로그인해주세요`,
+            });
+            return;
+          }
+
           setSendCode(true);
           toast.success(successMessage);
           restart(data.data.expireIn);
diff --git a/src/types/auth/auth.ts b/src/types/auth/auth.ts
index 902524b..c3e18f9 100644
--- a/src/types/auth/auth.ts
+++ b/src/types/auth/auth.ts
@@ -6,6 +6,8 @@ export interface IEmailSendResponse {
   message: string;
   email: string;
   expireIn: number;
+  isProviderLinked: boolean;
+  providerTypes: TLoginProvider[];
 }
 
 export interface IEmailVerifyRequest {