// SPDX-License-Identifier: LicenseRef-ConusAI-Template-1.0
// What of this app's Better Auth configuration shapes its tables. ./schema.ts is generated from it
// (test/better-auth.test.ts checks the two agree; `pnpm exec vitest run test/better-auth.test.ts -u`
// regenerates the schema after a change here), and ../auth.ts builds Better Auth with it.
//
//   - email and password sign-in, without e-mail verification (an app that sends mail turns it on)
//   - the person's own account deletion (`/delete-user`): the revocation relay hands it to the app's
//     account flow, which erases the person's data in every module (apps/web/src/server/better-auth.ts)
//   - the admin plugin: an administrator disables (`banned`) a user, which ends every session of the
//     user and refuses the next sign-in; the session validation refuses a disabled user as well
//   - rate limits kept in the deployment's own table, since a Convex function keeps no memory
import { convex } from "@convex-dev/better-auth/plugins"
import type { BetterAuthOptions } from "better-auth/minimal"
import { admin } from "better-auth/plugins/admin"
import type { AuthConfig } from "convex/server"

export const MIN_PASSWORD_LENGTH = 12

/** The administrators the admin plugin accepts, by Better Auth user ID (BETTER_AUTH_ADMIN_USER_IDS, comma-separated). */
const adminUserIds = (): string[] =>
  (process.env.BETTER_AUTH_ADMIN_USER_IDS ?? "")
    .split(",")
    .map((id) => id.trim())
    .filter(Boolean)

export function betterAuthOptions(authConfig: AuthConfig) {
  return {
    emailAndPassword: { enabled: true, requireEmailVerification: false, minPasswordLength: MIN_PASSWORD_LENGTH },
    user: { deleteUser: { enabled: true } },
    rateLimit: { enabled: true, storage: "database" },
    plugins: [convex({ authConfig }), admin({ adminUserIds: adminUserIds() })],
  } satisfies Omit<BetterAuthOptions, "database">
}