/**
 * Relay management methods for ConfigStorage
 */

import type { RelayConfig, ConfigData } from './configStorageTypes'
import { DEFAULT_RELAYS } from './configStorageTypes'

export function getEnabledRelays(config: ConfigData): string[] {
  return config.relays
    .filter((relay) => relay.enabled)
    .sort((a, b) => a.priority - b.priority)
    .map((relay) => relay.url)
}

export function getPrimaryRelayFromConfig(config: ConfigData): string {
  const relays = getEnabledRelays(config)
  if (relays.length === 0) {
    const defaultRelay = DEFAULT_RELAYS[0]
    if (!defaultRelay) {
      throw new Error('No default relay configured')
    }
    return defaultRelay.url
  }
  const primaryRelay = relays[0]
  if (!primaryRelay) {
    const defaultRelay = DEFAULT_RELAYS[0]
    if (!defaultRelay) {
      throw new Error('No default relay configured')
    }
    return defaultRelay.url
  }
  return primaryRelay
}

export function createRelayConfig(url: string, enabled: boolean, priority: number): RelayConfig {
  return {
    id: `relay_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`,
    url,
    enabled,
    priority,
    createdAt: Date.now(),
  }
}

export function addRelayToConfig(config: ConfigData, url: string, enabled: boolean, priority?: number): ConfigData {
  const maxPriority = Math.max(...config.relays.map((r) => r.priority), 0)
  const newRelay = createRelayConfig(url, enabled, priority ?? maxPriority + 1)
  return {
    ...config,
    relays: [...config.relays, newRelay],
  }
}

export function updateRelayInConfig(
  config: ConfigData,
  id: string,
  updates: Partial<Omit<RelayConfig, 'id' | 'createdAt'>>
): ConfigData {
  const relayIndex = config.relays.findIndex((r) => r.id === id)
  if (relayIndex === -1) {
    throw new Error(`Relay with id ${id} not found`)
  }
  const existingRelay = config.relays[relayIndex]
  const updatedRelays = [...config.relays]
  updatedRelays[relayIndex] = {
    ...existingRelay,
    ...updates,
  } as RelayConfig
  return {
    ...config,
    relays: updatedRelays,
  }
}

export function removeRelayFromConfig(config: ConfigData, id: string): ConfigData {
  return {
    ...config,
    relays: config.relays.filter((r) => r.id !== id),
  }
}