first user setup and login

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

@@ -0,0 +1,76 @@
+import NextAuth, { type NextAuthOptions } from 'next-auth'
+import CredentialsProvider from 'next-auth/providers/credentials'
+import { PrismaClient } from '@prisma/client'
+import bcrypt from 'bcrypt'
+
+const prisma = new PrismaClient()
+
+export const authOptions: NextAuthOptions = {
+  providers: [
+    CredentialsProvider({
+      name: 'Credentials',
+      credentials: {
+        email: { label: 'Email', type: 'email' },
+        password: { label: 'Password', type: 'password' },
+      },
+      async authorize(credentials) {
+        if (!credentials?.email || !credentials?.password) {
+          console.log('[AUTH] Missing credentials')
+          return null
+        }
+
+        const user = await prisma.user.findUnique({
+          where: { email: credentials.email },
+        })
+
+        if (!user) {
+          console.log('[AUTH] User not found')
+          return null
+        }
+
+        if (!user.password) {
+          console.log('[AUTH] User has no password set')
+          return null
+        }
+
+        const isValid = await bcrypt.compare(credentials.password, user.password)
+        if (!isValid) {
+          console.log('[AUTH] Invalid password')
+          return null
+        }
+
+        console.log('[AUTH] Successful login', user.email)
+
+        return {
+          id: user.id,
+          email: user.email,
+          name: user.name,
+          role: user.role,
+        }
+      },
+    }),
+  ],
+  session: {
+    strategy: 'jwt',
+  },
+  callbacks: {
+    async jwt({ token, user }) {
+      if (user) {
+        token.id = user.id
+        token.role = user.role
+      }
+      return token
+    },
+    async session({ session, token }) {
+      if (session.user) {
+        session.user.id = token.id as string
+        session.user.role = token.role as "COUPLE" | "PLANNER" | "GUEST"
+      }
+      return session
+    },
+  },
+  secret: process.env.NEXTAUTH_SECRET,
+}
+
+const handler = NextAuth(authOptions)
+export { handler as GET, handler as POST }