/**
 * Platform and region configuration for Riot Games API
 *
 * Platforms are the server clusters (EUW1, EUN1, NA1, KR)
 * Regions are the routing values for match API (EUROPE, AMERICAS, ASIA)
 */

// Platform to regional routing value mapping
const PLATFORMS: Record<string, string> = {
  EUW1: 'EUROPE',
  EUN1: 'EUROPE',
  NA1: 'AMERICAS',
  KR: 'ASIA'
}

// Platform counts for tracking item purchases per region
type PlatformCounts = {
  euw: number
  eun: number
  na: number
  kr: number
}

// Platform key mapping for converting platform strings to PlatformCounts keys
const PLATFORM_KEYS: Record<string, keyof PlatformCounts> = {
  euw1: 'euw',
  eun1: 'eun',
  na1: 'na',
  kr: 'kr'
}

// List of all region keys for iteration
const REGION_KEYS: Array<keyof PlatformCounts> = ['euw', 'eun', 'na', 'kr']

/**
 * Get the base URL for platform-specific API calls (e.g., league-v4)
 */
function getPlatformBaseUrl(platform: string): string {
  return `https://${platform.toLowerCase()}.api.riotgames.com`
}

/**
 * Get the base URL for regional API calls (e.g., match-v5)
 */
function getRegionalBaseUrl(region: string): string {
  return `https://${region.toLowerCase()}.api.riotgames.com`
}

/**
 * Get the regional routing value for a platform
 * Falls back to the provided default region if platform not found
 */
function getRegionForPlatform(platform: string): string | undefined {
  return PLATFORMS[platform]
}

/**
 * Initialize an empty PlatformCounts object
 */
function initPlatformCounts(): PlatformCounts {
  return { euw: 0, eun: 0, na: 0, kr: 0 }
}

/**
 * Merge platform counts from source into target
 */
function mergePlatformCounts(target: PlatformCounts, source: PlatformCounts): void {
  for (const key of REGION_KEYS) {
    target[key] += source[key]
  }
}

/**
 * Create a platform count with a single platform set to 1
 */
function singlePlatformCount(platform: string): PlatformCounts {
  const counts = initPlatformCounts()
  const key = PLATFORM_KEYS[platform.toLowerCase()]
  if (key) {
    counts[key] = 1
  }
  return counts
}

/**
 * Get the PlatformCounts key for a platform string
 */
function getPlatformKey(platform: string): keyof PlatformCounts | undefined {
  return PLATFORM_KEYS[platform.toLowerCase()]
}

export {
  PLATFORMS,
  PlatformCounts,
  PLATFORM_KEYS,
  REGION_KEYS,
  getPlatformBaseUrl,
  getRegionalBaseUrl,
  getRegionForPlatform,
  initPlatformCounts,
  mergePlatformCounts,
  singlePlatformCount,
  getPlatformKey
}