import NextAuth from "next-auth";
import Credentials from "next-auth/providers/credentials";
import Google from "next-auth/providers/google";
import { PrismaClient } from "@prisma/client";
import bcrypt from "bcryptjs";

const prisma = new PrismaClient();

export const { handlers, signIn, signOut, auth } = NextAuth({
  providers: [
    Google({
      clientId: process.env.GOOGLE_CLIENT_ID,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET,
    }),
    Credentials({
      name: "credentials",
      credentials: {
        email: { label: "Email", type: "email" },
        password: { label: "Password", type: "password" },
      },
      async authorize(credentials) {
        if (!credentials?.email || !credentials?.password) {
          return null;
        }

        const user = await prisma.user.findUnique({
          where: { email: credentials.email as string },
        });

        if (!user || !user.password) {
          return null;
        }

        // Check if email is verified
        if (!user.emailVerified) {
          throw new Error("email-not-verified");
        }

        const isPasswordValid = await bcrypt.compare(
          credentials.password as string,
          user.password
        );

        if (!isPasswordValid) {
          return null;
        }

        return {
          id: user.id,
          email: user.email,
          name: user.name,
          image: user.image,
          role: user.role,
        };
      },
    }),
  ],
  session: {
    strategy: "jwt",
  },
  callbacks: {
    async jwt({ token, user }) {
      if (user) {
        token.role = (user as any).role;
        token.id = user.id;
      }
      return token;
    },
    async session({ session, token }) {
      if (session.user) {
        session.user.role = token.role as string;
        (session.user as any).id = token.id;
      }
      return session;
    },
    async signIn({ user, account }) {
      if (account?.provider === "google") {
        const existingUser = await prisma.user.findUnique({
          where: { email: user.email! },
        });

        if (!existingUser) {
          const newUser = await prisma.user.create({
            data: {
              email: user.email!,
              name: user.name || user.email!.split("@")[0],
              password: "google_auth",
              image: user.image,
              emailVerified: new Date(),
              role: "member",
            },
          });
          user.id = newUser.id;
          (user as any).role = newUser.role;
        } else {
          user.id = existingUser.id;
          (user as any).role = existingUser.role;
        }
      }
      return true;
    },
  },
  pages: {
    signIn: "/auth/login",
    error: "/auth/error",
  },
});