import { z } from "zod";

// Server-side environment schema (t3.gg style)
const serverSchema = z.object({
  // Full MySQL connection URL, e.g. mysql://user:pass@host:3306/zxdb
  ZXDB_URL: z
    .string()
    .url()
    .refine((s) => s.startsWith("mysql://"), {
      message: "ZXDB_URL must be a valid mysql:// URL",
    }),
});

function formatErrors(errors: z.ZodFormattedError<Map<string, string>, string>) {
  return Object.entries(errors)
    .map(([name, value]) => {
      if (value && "_errors" in value) {
        return `${name}: ${(value as any)._errors.join(", ")}`;
      }
      return `${name}: invalid`;
    })
    .join("\n");
}

const parsed = serverSchema.safeParse(process.env);
if (!parsed.success) {
  // Fail fast with helpful output in server context
  // eslint-disable-next-line no-console
  console.error("❌ Invalid environment variables:\n" + formatErrors(parsed.error.format()));
  throw new Error("Invalid environment variables");
}

export const env = parsed.data;