package config

import (
	"fmt"
	"os"
)

// Config holds startup configuration for the core module.
// RegistryDSN points at the control-plane registry DB (tenant list,
// connection info, superadmin accounts) — see nexarch-state.json
// multi_tenancy: Modell C (physisch getrennte DB pro Mandant).
type Config struct {
	ListenAddr  string
	RegistryDSN string
}

func Load() (Config, error) {
	dsn := os.Getenv("NEXARCH_REGISTRY_DSN")
	if dsn == "" {
		return Config{}, fmt.Errorf("NEXARCH_REGISTRY_DSN not set")
	}

	addr := os.Getenv("NEXARCH_LISTEN_ADDR")
	if addr == "" {
		addr = ":8080"
	}

	return Config{ListenAddr: addr, RegistryDSN: dsn}, nil
}