implement oauth2 login

app/api/auth/[...nextauth]/route.ts

@@ -0,0 +1,3 @@
+import { handlers } from "@/src/lib/auth";
+
+export const { GET, POST } = handlers;

app/api/auth/callback/route.ts

@@ -1,24 +0,0 @@
-import { NextRequest, NextResponse } from "next/server";
-import { finalizeOAuthLogin } from "@/src/lib/auth/oauth";
-import { createSession } from "@/src/lib/auth/session";
-import { config } from "@/src/lib/config";
-
-export async function GET(request: NextRequest) {
-  const url = new URL(request.url);
-  const code = url.searchParams.get("code");
-  const state = url.searchParams.get("state");
-
-  if (!code || !state) {
-    return NextResponse.redirect(new URL("/login?error=invalid_response", config.baseUrl));
-  }
-
-  try {
-    const { user, redirectTo } = await finalizeOAuthLogin(code, state);
-    await createSession(user.id);
-    const destination = redirectTo && redirectTo.startsWith("/") ? redirectTo : "/";
-    return NextResponse.redirect(new URL(destination, config.baseUrl));
-  } catch (error) {
-    console.error("OAuth callback failed", error);
-    return NextResponse.redirect(new URL("/login?error=oauth_failed", config.baseUrl));
-  }
-}

app/api/auth/logout/route.ts

@@ -1,8 +1,5 @@
-import { NextResponse } from "next/server";
-import { destroySession } from "@/src/lib/auth/session";
-import { config } from "@/src/lib/config";
+import { signOut } from "@/src/lib/auth";
 
 export async function POST() {
-  await destroySession();
-  return NextResponse.redirect(new URL("/login", config.baseUrl));
+  await signOut({ redirectTo: "/login" });
 }