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

const requiredForProduction = () =>
    process.env.NODE_ENV === "production"
        ? z.string().min(1).trim()
        : z.string().min(1).trim().optional();

function stringToBoolean() {
    return z.preprocess((str) => str === "true", z.boolean());
}

/**
 * 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: z.string().url(),
    NODE_ENV: z.enum(["development", "test", "production"]),
    NEXTAUTH_SECRET: requiredForProduction(),
    NEXTAUTH_URL: 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()
    ),
    OPENAI_API_KEY: z.string().min(1).trim().optional(),

    GOOGLE_CLIENT_ID: z.string().min(1).trim().optional(),
    GOOGLE_CLIENT_SECRET: z.string().min(1).trim().optional(),
    GITHUB_CLIENT_ID: z.string().min(1).trim().optional(),
    GITHUB_CLIENT_SECRET: z.string().min(1).trim().optional(),
    DISCORD_CLIENT_ID: z.string().min(1).trim().optional(),
    DISCORD_CLIENT_SECRET: z.string().min(1).trim().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,
    NODE_ENV: process.env.NODE_ENV,
    NEXTAUTH_SECRET: process.env.NEXTAUTH_SECRET,
    NEXTAUTH_URL: process.env.NEXTAUTH_URL,
    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,
};

/**
 * 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_EXPERIMENTAL_FF_ENABLED: stringToBoolean().default(false),
    NEXT_PUBLIC_CDN: z.string().default(""),
    NEXT_PUBLIC_VERCEL_ENV: z.enum(["production", "preview", "development", "test"]).default("development"),
    NEXT_PUBLIC_FF_MOCK_MODE_ENABLED: stringToBoolean().default(false),
    NEXT_PUBLIC_FF_SID_ENABLED: stringToBoolean().default(false),
    NEXT_PUBLIC_VERCEL_URL: z.string().default("http://localhost:3000"),
    NEXT_PUBLIC_BACKEND_URL: z.string().url().default("http://localhost:8000"),
    NEXT_PUBLIC_MAX_LOOPS: z.coerce.number().default(25),
    NEXT_PUBLIC_PUSHER_APP_KEY: z.string().optional(),
});

/**
 * 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_CDN: process.env.NEXT_PUBLIC_CDN,
    NEXT_PUBLIC_EXPERIMENTAL_FF_ENABLED: process.env.NEXT_PUBLIC_EXPERIMENTAL_FF_ENABLED,
    NEXT_PUBLIC_VERCEL_ENV: process.env.NEXT_PUBLIC_VERCEL_ENV,
    NEXT_PUBLIC_VERCEL_URL: process.env.NEXT_PUBLIC_VERCEL_URL,
    NEXT_PUBLIC_BACKEND_URL: process.env.NEXT_PUBLIC_BACKEND_URL,
    NEXT_PUBLIC_FF_MOCK_MODE_ENABLED: process.env.NEXT_PUBLIC_FF_MOCK_MODE_ENABLED,
    NEXT_PUBLIC_FF_SID_ENABLED: process.env.NEXT_PUBLIC_FF_SID_ENABLED,
    NEXT_PUBLIC_MAX_LOOPS: process.env.NEXT_PUBLIC_MAX_LOOPS,
    NEXT_PUBLIC_PUSHER_APP_KEY: process.env.NEXT_PUBLIC_PUSHER_APP_KEY,
};