auth.ts

import { betterAuth, BetterAuthOptions } from "better-auth";
import { prismaAdapter } from "better-auth/adapters/prisma";
import prisma from "@/lib/prisma";
import { sendEmail } from "@/actions/email";
import { openAPI } from "better-auth/plugins";
import { admin } from "better-auth/plugins";


export const auth = betterAuth({
  database: prismaAdapter(prisma, {
    provider: "mongodb",
  }),
  session: {
    expiresIn: 60 * 60 * 24 * 7, // 7 days
    // BUG: Prob a bug with updateAge method. It throws an error - Argument `where` of type SessionWhereUniqueInput needs at least one of `id` arguments. 
    // As a workaround, set updateAge to a large value for now.
    updateAge: 60 * 60 * 24 * 7, // 7 days (every 7 days the session expiration is updated)
    cookieCache: {
      enabled: true,
      maxAge: 5 * 60 // Cache duration in seconds
    }
  },
  user: {
    additionalFields: {
      premium: {
        type: "boolean",
        required: false,
      },
    },
    changeEmail: {
      enabled: true,
      sendChangeEmailVerification: async ({ newEmail, url }) => {
        await sendEmail({
          to: newEmail,
          subject: 'Verify your email change',
          text: `Click the link to verify: ${url}`
        })
      }
    }
  },
  socialProviders: {
    github: {
      clientId: process.env.GITHUB_CLIENT_ID as string,
      clientSecret: process.env.GITHUB_CLIENT_SECRET as string,
    },
  },
  plugins: [openAPI(), admin({
    impersonationSessionDuration: 60 * 60 * 24 * 7, // 7 days
  })], // api/auth/reference
  emailAndPassword: {
    enabled: true,
    requireEmailVerification: true,
    sendResetPassword: async ({ user, url }) => {
      await sendEmail({
        to: user.email,
        subject: "Reset your password",
        text: `Click the link to reset your password: ${url}`,
      });
    },
  },
  emailVerification: {
    sendOnSignUp: true,
    autoSignInAfterVerification: true,
    sendVerificationEmail: async ({ user, token }) => {
      const verificationUrl = `${process.env.BETTER_AUTH_URL}/api/auth/verify-email?token=${token}&callbackURL=${process.env.EMAIL_VERIFICATION_CALLBACK_URL}`;
      await sendEmail({
        to: user.email,
        subject: "Verify your email address",
        text: `Click the link to verify your email: ${verificationUrl}`,
      });
    },
  }
} satisfies BetterAuthOptions);

export type Session = typeof auth.$Infer.Session;