import { z } from "zod";

const envSchema = z.object({
  DATABASE_URL: z.string().min(1),
  REDIS_URL: z.string().min(1).optional(),
  WORKER_DRY_RUN: z
    .enum(["0", "1", "true", "false", ""])
    .optional()
    .transform((value) => value === "1" || value === "true"),
  WORKER_BLPOP_TIMEOUT_S: z
    .string()
    .optional()
    .transform((value) => {
      const parsed = Number(value ?? "5");
      return Number.isFinite(parsed) && parsed > 0 ? parsed : 5;
    }),
  WORKER_MAX_TOOL_STEPS: z
    .string()
    .optional()
    .transform((value) => {
      const parsed = Number(value ?? "12");
      return Number.isFinite(parsed) && parsed > 0 ? parsed : 12;
    }),
  WORKER_REPO_ROOT: z.string().optional(),
  WORKER_WORKTREE_BASE: z
    .string()
    .optional()
    .transform((value) => value?.trim() || "/tmp/echodo-worker-worktrees"),
});

export type WorkerEnv = z.infer<typeof envSchema>;

export function loadEnv(): WorkerEnv {
  const parsed = envSchema.safeParse(process.env);
  if (!parsed.success) {
    console.error("[worker] Invalid environment:", parsed.error.flatten().fieldErrors);
    process.exit(1);
  }
  return parsed.data;
}