/**
 * Configuration for Nostr services
 * Handles environment variables and defaults
 */

const DEFAULT_RELAYS = [
  'wss://theforest.nostr1.com',
  'wss://nostr21.com',
  'wss://nostr.land',
  'wss://nostr.wine',
  'wss://nostr.sovbit.host',
  'wss://orly-relay.imwald.eu'
];

const PROFILE_RELAYS = [
  'wss://relay.damus.io',
  'wss://aggr.nostr.land',
  'wss://profiles.nostr1.com'
];

const THREAD_PUBLISH_RELAYS = [
  'wss://thecitadel.nostr1.com'
];

const RELAY_TIMEOUT = 10000;

export interface NostrConfig {
  defaultRelays: string[];
  profileRelays: string[];
  zapThreshold: number;
  threadTimeoutDays: number;
  threadPublishRelays: string[];
  relayTimeout: number;
}

function parseRelays(envVar: string | undefined, fallback: string[]): string[] {
  if (!envVar) return fallback;
  const relays = envVar
    .split(',')
    .map((r) => r.trim())
    .filter((r) => r.length > 0);
  return relays.length > 0 ? relays : fallback;
}

function parseIntEnv(envVar: string | undefined, fallback: number, min: number = 0): number {
  if (!envVar) return fallback;
  const parsed = parseInt(envVar, 10);
  if (isNaN(parsed) || parsed < min) return fallback;
  return parsed;
}

export function getConfig(): NostrConfig {
  return {
    defaultRelays: parseRelays(import.meta.env.VITE_DEFAULT_RELAYS, DEFAULT_RELAYS),
    profileRelays: PROFILE_RELAYS,
    zapThreshold: parseIntEnv(import.meta.env.VITE_ZAP_THRESHOLD, 1, 0),
    threadTimeoutDays: parseIntEnv(import.meta.env.VITE_THREAD_TIMEOUT_DAYS, 30),
    threadPublishRelays: THREAD_PUBLISH_RELAYS,
    relayTimeout: RELAY_TIMEOUT
  };
}

export const config = getConfig();