import { betterAuth } from "better-auth";
import { drizzleAdapter } from "better-auth/adapters/drizzle";
import { db, users, sessions, accounts, verifications, eq, count } from "@epicure/db";
import { sendEmail, verifyEmailHtml, resetPasswordHtml, welcomeHtml } from "@/lib/email";

export const auth = betterAuth({
  database: drizzleAdapter(db, {
    provider: "pg",
    schema: { user: users, session: sessions, account: accounts, verification: verifications },
  }),

  emailAndPassword: {
    enabled: true,
    requireEmailVerification: true,
    sendResetPassword: async ({ user, url }) => {
      await sendEmail({
        to: user.email,
        subject: "Reset your Epicure password",
        html: resetPasswordHtml(url),
      });
    },
  },

  emailVerification: {
    sendOnSignUp: true,
    autoSignInAfterVerification: true,
    sendVerificationEmail: async ({ user, url }) => {
      await sendEmail({
        to: user.email,
        subject: "Verify your Epicure email",
        html: verifyEmailHtml(url),
      });
    },
  },

  socialProviders: {
    google: {
      clientId: process.env["GOOGLE_CLIENT_ID"] ?? "",
      clientSecret: process.env["GOOGLE_CLIENT_SECRET"] ?? "",
    },
  },

  session: {
    cookieCache: {
      enabled: true,
      maxAge: 60 * 5,
    },
  },

  databaseHooks: {
    user: {
      create: {
        after: async (user) => {
          // First registered user becomes admin
          const result = await db.select({ total: count() }).from(users);
          if ((result[0]?.total ?? 0) === 1) {
            await db.update(users).set({ role: "admin" }).where(eq(users.id, user.id));
          }
          // Welcome email (fire and forget)
          sendEmail({
            to: user.email,
            subject: "Welcome to Epicure",
            html: welcomeHtml(user.name),
          }).catch(() => {});
        },
      },
    },
  },

  user: {
    additionalFields: {
      role: {
        type: "string",
        defaultValue: "user",
        input: false,
      },
      tier: {
        type: "string",
        defaultValue: "free",
        input: false,
      },
      username: {
        type: "string",
        required: false,
      },
      bio: {
        type: "string",
        required: false,
      },
      unitPref: {
        type: "string",
        defaultValue: "metric",
      },
      locale: {
        type: "string",
        defaultValue: "en",
      },
    },
    changeEmail: {
      enabled: true,
      sendChangeEmailVerification: async ({ newEmail, url }) => {
        await sendEmail({
          to: newEmail,
          subject: "Verify your new Epicure email",
          html: verifyEmailHtml(url),
        });
      },
    },
  },
});

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