schema.mjs

// @ts-check
import { z } from "zod";
import { v4 } from "uuid";

const isProdutionAndAuthEnabled =
  process.env.NODE_ENV === "production" &&
  process.env.NEXT_PUBLIC_FF_AUTH_ENABLED === "true";

const requiredAuthEnabledForProduction = () => {
  return isProdutionAndAuthEnabled
    ? z.string().min(1).trim()
    : z.string().optional();
};

const stringToBoolean = () => {
  return z.preprocess((str) => str === "true", z.boolean());
};
const stringToNumber = () => {
  return z.preprocess((str) => Number(str), z.number());
};

const validateDataBaseUrl = () => {
  return isProdutionAndAuthEnabled
    ? z.string().url()
    : z.string().url().optional();
};

const validateNextUrl = () => {
  return isProdutionAndAuthEnabled
    ? z.preprocess(
        // This makes Vercel deployments not fail if you don't set NEXTAUTH_URL
        // Since NextAuth.js automatically uses the VERCEL_URL if present.
        (str) => process.env.VERCEL_URL ?? str,
        // VERCEL_URL doesn't include `https` so it cant be validated as a URL
        process.env.VERCEL ? z.string() : z.string().url()
      )
    : z.string().url();
};

/**
 * Specify your server-side environment variables schema here.
 * This way you can ensure the app isn't built with invalid env vars.
 */
export const serverSchema = z.object({
  DATABASE_URL: validateDataBaseUrl(),
  NODE_ENV: z.enum(["development", "test", "production"]),
  NEXTAUTH_SECRET: requiredAuthEnabledForProduction(),
  NEXTAUTH_URL: validateNextUrl(),
  OPENAI_API_KEY: z.string(),

  GOOGLE_CLIENT_ID: requiredAuthEnabledForProduction(),
  GOOGLE_CLIENT_SECRET: requiredAuthEnabledForProduction(),
  GITHUB_CLIENT_ID: requiredAuthEnabledForProduction(),
  GITHUB_CLIENT_SECRET: requiredAuthEnabledForProduction(),
  DISCORD_CLIENT_ID: requiredAuthEnabledForProduction(),
  DISCORD_CLIENT_SECRET: requiredAuthEnabledForProduction(),

  STRIPE_SECRET_KEY: z.string().optional(),
  STRIPE_WEBHOOK_SECRET: z.string().optional(),
  STRIPE_SUBSCRIPTION_PRICE_ID: z.string().optional(),

  UPSTASH_REDIS_REST_URL: z.string().optional(),
  UPSTASH_REDIS_REST_TOKEN: z.string().optional(),
  RATE_LIMITER_REQUESTS_PER_MINUTE: stringToNumber().optional(),
});

/**
 * You can't destruct `process.env` as a regular object in the Next.js
 * middleware, so you have to do it manually here.
 * @type {{ [k in keyof z.input<typeof serverSchema>]: string | undefined }}
 */
export const serverEnv = {
  DATABASE_URL: process.env.DATABASE_URL ?? "file:./db.sqlite",
  NODE_ENV: process.env.NODE_ENV,
  NEXTAUTH_SECRET: process.env.NEXTAUTH_SECRET ?? v4(),
  NEXTAUTH_URL: process.env.NEXTAUTH_URL ?? "http://localhost:3000",
  OPENAI_API_KEY: process.env.OPENAI_API_KEY,
  GOOGLE_CLIENT_ID: process.env.GOOGLE_CLIENT_ID,
  GOOGLE_CLIENT_SECRET: process.env.GOOGLE_CLIENT_SECRET,
  GITHUB_CLIENT_ID: process.env.GITHUB_CLIENT_ID,
  GITHUB_CLIENT_SECRET: process.env.GITHUB_CLIENT_SECRET,
  DISCORD_CLIENT_ID: process.env.DISCORD_CLIENT_ID,
  DISCORD_CLIENT_SECRET: process.env.DISCORD_CLIENT_SECRET,

  STRIPE_SECRET_KEY: process.env.STRIPE_SECRET_KEY,
  STRIPE_WEBHOOK_SECRET: process.env.STRIPE_WEBHOOK_SECRET,
  STRIPE_SUBSCRIPTION_PRICE_ID: process.env.STRIPE_SUBSCRIPTION_PRICE_ID,

  // Rate limiter
  UPSTASH_REDIS_REST_URL: process.env.UPSTASH_REDIS_REST_URL,
  UPSTASH_REDIS_REST_TOKEN: process.env.UPSTASH_REDIS_REST_TOKEN,
  RATE_LIMITER_REQUESTS_PER_MINUTE:
    process.env.RATE_LIMITER_REQUESTS_PER_MINUTE,
};

/**
 * Specify your client-side environment variables schema here.
 * This way you can ensure the app isn't built with invalid env vars.
 * To expose them to the client, prefix them with `NEXT_PUBLIC_`.
 */
export const clientSchema = z.object({
  // NEXT_PUBLIC_CLIENTVAR: z.string(),
  NEXT_PUBLIC_VERCEL_ENV: z.enum(["production", "preview", "development"]),
  NEXT_PUBLIC_STRIPE_DONATION_ENABLED: stringToBoolean().optional(),
  NEXT_PUBLIC_FF_AUTH_ENABLED: stringToBoolean(),
  NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY: z.string().optional(),
  NEXT_PUBLIC_FF_SUB_ENABLED: stringToBoolean(),
  NEXT_PUBLIC_FF_MOCK_MODE_ENABLED: stringToBoolean(),
  NEXT_PUBLIC_VERCEL_URL: z.string().optional(),
  NEXT_PUBLIC_GUEST_KEY: z.string().optional(),
  NEXT_PUBLIC_WEB_SEARCH_ENABLED: stringToBoolean(),
});

/**
 * You can't destruct `process.env` as a regular object, so you have to do
 * it manually here. This is because Next.js evaluates this at build time,
 * and only used environment variables are included in the build.
 * @type {{ [k in keyof z.input<typeof clientSchema>]: string | undefined }}
 */
export const clientEnv = {
  NEXT_PUBLIC_VERCEL_ENV: process.env.NEXT_PUBLIC_VERCEL_ENV ?? "development",
  NEXT_PUBLIC_STRIPE_DONATION_ENABLED:
    process.env.NEXT_PUBLIC_STRIPE_DONATION_ENABLED,
  NEXT_PUBLIC_FF_AUTH_ENABLED: process.env.NEXT_PUBLIC_FF_AUTH_ENABLED,
  NEXT_PUBLIC_VERCEL_URL:
    process.env.NEXT_PUBLIC_VERCEL_URL ?? "http://localhost:3000",
  NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY:
    process.env.NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY,
  NEXT_PUBLIC_FF_SUB_ENABLED: process.env.NEXT_PUBLIC_FF_SUB_ENABLED,
  NEXT_PUBLIC_FF_MOCK_MODE_ENABLED:
    process.env.NEXT_PUBLIC_FF_MOCK_MODE_ENABLED,
  NEXT_PUBLIC_GUEST_KEY: process.env.NEXT_PUBLIC_GUEST_KEY ?? "",
  NEXT_PUBLIC_WEB_SEARCH_ENABLED: process.env.NEXT_PUBLIC_WEB_SEARCH_ENABLED,
};