import { isAdminPath } from '@/shared/utils/adminPath'

export function isMobileHost(hostname = window.location.hostname) {
  return hostname === 'm.localhost' || hostname.startsWith('m.')
}

export function isMobileDevice() {
  if (typeof window === 'undefined' || !window.navigator) return false
  const ua = window.navigator.userAgent
  const isMobileUA = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(ua)
  const isSmallScreen = window.innerWidth < 768
  return isMobileUA || isSmallScreen
}

export function getMobilePath(path: string): string {
  if (path === '/' || path === '') {
    return '/m'
  }
  if (path === '/m' || path.startsWith('/m/') || isAdminPath(path)) {
    return path
  }

  if (path === '/listings' || path.startsWith('/listings/')) {
    return `/m${path}`
  }
  if (path === '/orders' || path.startsWith('/orders/')) {
    return `/m${path}`
  }
  if (path === '/realname') return '/m/realname'
  if (path === '/login') return '/m/login'
  if (path === '/register') return '/m/register'

  if (path === '/seller/listings/create') {
    return '/m/seller/listings/create'
  }
  if (path.startsWith('/seller/listings/') && path.endsWith('/edit')) {
    return `/m${path}`
  }
  if (path === '/messages' || path.startsWith('/messages/')) {
    return '/m/messages'
  }

  // PC-only views that don't have mobile counterparts go to mobile profile as fallback
  if (path === '/wallet/withdrawal') return '/m/wallet/withdrawal'

  if (path === '/wallet' || path === '/notifications' || path.startsWith('/seller')) {
    return '/m/profile'
  }

  return `/m${path}`
}

export function getPcPath(path: string): string {
  if ((path !== '/m' && !path.startsWith('/m/')) || isAdminPath(path)) {
    return path
  }

  if (path === '/m' || path === '/m/') {
    return '/'
  }

  const subPath = path.substring(2)

  if (subPath === '/listings' || subPath.startsWith('/listings/')) {
    return subPath
  }
  if (subPath === '/orders' || subPath.startsWith('/orders/')) {
    return subPath
  }
  if (subPath === '/login') return '/login'
  if (subPath === '/register') return '/login' // PC uses /login for both auth actions
  if (subPath === '/realname') return '/realname'
  if (subPath === '/wallet/withdrawal') return '/wallet/withdrawal'
  if (subPath === '/seller/listings/create') return '/seller/listings/create'
  if (subPath.startsWith('/seller/listings/') && subPath.endsWith('/edit')) return subPath

  if (subPath === '/messages') return '/messages'
  if (subPath.startsWith('/chats/')) return '/messages/' + subPath.substring(7)
  if (subPath === '/profile') return '/wallet'

  return subPath || '/'
}

export function toMobilePath(path: string) {
  return getMobilePath(path)
}