import NextAuth from 'next-auth'
import GitHub from 'next-auth/providers/github'
import Google from 'next-auth/providers/google'
import Credentials from 'next-auth/providers/credentials'

const handler = NextAuth({
  providers: [
    GitHub({
      clientId: process.env.GITHUB_ID,
      clientSecret: process.env.GITHUB_SECRET,
    }),
    Google({
      clientId: process.env.GOOGLE_ID,
      clientSecret: process.env.GOOGLE_SECRET,
    }),
    Credentials({
      name: 'Credentials',
      credentials: {
        email: { label: "Email", type: "email" },
        password: { label: "Password", type: "password" }
      },
      async authorize(credentials) {
        // Call backend API to verify credentials
        const res = await fetch(`${process.env.NEXT_PUBLIC_API_URL}/api/auth/login`, {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify(credentials)
        })

        const user = await res.json()
        if (res.ok && user) {
          return user
        }
        return null
      }
    })
  ],
  pages: {
    signIn: '/auth/signin',
  },
  callbacks: {
    async jwt({ token, user }) {
      if (user) {
        token.id = user.id
        token.email = user.email
        token.name = user.name
      }
      return token
    },
    async session({ session, token }) {
      if (session.user) {
        session.user.id = token.id
        session.user.email = token.email
      }
      return session
    }
  },
  session: {
    strategy: 'jwt',
    maxAge: 30 * 24 * 60 * 60, // 30 days
  }
})

export { handler as GET, handler as POST }