import { betterAuth } from "better-auth";
import { magicLink, twoFactor, admin } from "better-auth/plugins";
import { nextCookies } from "better-auth/next-js";
import { Pool } from "pg";
import { sendMagicLinkEmail } from "./services/email";
import { ac, adminRole, userRole, superAdminRole } from "./permissions";

// Create a PostgreSQL pool for Better Auth
const pool = new Pool({
  connectionString: process.env.DATABASE_URL,
});

export const auth = betterAuth({
  database: pool,
  appName: "Pulse",
  baseURL: process.env.BETTER_AUTH_URL,
  secret: process.env.BETTER_AUTH_SECRET,
  trustedOrigins: [
    "http://localhost:3100",
    "https://pulse.wulfconsulting.cloud"
  ],

  // Email & Password disabled - using magic link and Microsoft OAuth only
  emailAndPassword: {
    enabled: false,
  },

  // Session configuration
  session: {
    expiresIn: parseInt(process.env.SESSION_TIMEOUT_SECONDS || "86400"),
    updateAge: 60 * 60, // Update session every hour
    cookieCache: {
      enabled: true,
      maxAge: 5 * 60, // 5 minutes
    },
  },

  // Social providers
  socialProviders: {
    microsoft: {
      clientId: process.env.MICROSOFT_CLIENT_ID || "",
      clientSecret: process.env.MICROSOFT_CLIENT_SECRET || "",
      tenantId: process.env.MICROSOFT_TENANT_ID || "common",
    },
  },

  // Plugins
  plugins: [
    // Magic link authentication
    magicLink({
      sendMagicLink: async ({ email, url, token }) => {
        await sendMagicLinkEmail({ email, url, token });
      },
      expiresIn: 300, // 5 minutes
    }),

    // Two-factor authentication
    twoFactor({
      issuer: "Pulse",
    }),

    // Admin plugin with RBAC
    admin({
      ac,
      roles: {
        "super-admin": superAdminRole,
        admin: adminRole,
        user: userRole,
      },
    }),

    // Next.js cookie handling - must be last
    nextCookies(),
  ],

  // Allow Microsoft OAuth to link to existing accounts created by admins
  account: {
    accountLinking: {
      enabled: true,
      trustedProviders: ["microsoft"],
    },
  },

  // User configuration
  user: {
    additionalFields: {
      role: {
        type: "string",
        defaultValue: "user",
      },
      requires_setup: {
        type: "boolean",
        defaultValue: false,
      },
      timezone: {
        type: "string",
        defaultValue: process.env.DEFAULT_TIMEZONE || "UTC",
      },
      theme: {
        type: "string",
        defaultValue: "system",
      },
    },
  },
});

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