import { z } from "zod";

const envSchema = z.object({
  DATABASE_URL: z.string().min(1),
  REDIS_URL: z.string().min(1).optional(),
  ORCHESTRATOR_DRY_RUN: z
    .enum(["0", "1", "true", "false", ""])
    .optional()
    .transform((value) => value === "1" || value === "true"),
  ORCHESTRATOR_POLL_MS: z
    .string()
    .optional()
    .transform((value) => {
      const parsed = Number(value ?? "5000");
      return Number.isFinite(parsed) && parsed > 0 ? parsed : 5_000;
    }),
  ORCHESTRATOR_STALL_MINUTES: z
    .string()
    .optional()
    .transform((value) => {
      const parsed = Number(value ?? "120");
      return Number.isFinite(parsed) && parsed > 0 ? parsed : 120;
    }),
  ORCHESTRATOR_MAX_IMPLEMENTERS: z
    .string()
    .optional()
    .transform((value) => {
      const parsed = Number(value ?? "2");
      return Number.isFinite(parsed) && parsed > 0 ? parsed : 2;
    }),
});

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

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