/**
 * WorthDoing.ai
 * Author: Simon-Pierre Boucher
 * Contact: contact@spboucher.ai
 * File: src/lib/env.ts
 * Description: Zod-validated server-side environment variables (never import from client code).
 */
import { z } from "zod";

const envSchema = z.object({
  ANTHROPIC_API_KEY: z.string().min(10),
  FIRECRAWL_API_KEY: z.string().min(10),
  DATABASE_URL: z.string().url(),
  PUBLIC_BASE_URL: z.string().url().default("https://www.worthdoing.ai"),
  CLAUDE_AGENT_MODEL: z.string().default("claude-opus-5"),
  CLAUDE_SYNTHESIS_MODEL: z.string().default("claude-opus-5"),
  NODE_ENV: z.enum(["development", "test", "production"]).default("development"),
});

let cached: z.infer<typeof envSchema> | null = null;

/** Validated environment. Throws a structured error at first server-side access if misconfigured. */
export function env(): z.infer<typeof envSchema> {
  if (cached) return cached;
  const parsed = envSchema.safeParse(process.env);
  if (!parsed.success) {
    const missing = parsed.error.issues.map((i) => i.path.join(".")).join(", ");
    throw new Error(`Invalid environment configuration: ${missing}`);
  }
  cached = parsed.data;
  return cached;
}