import { createBrowserClient } from '@supabase/ssr'

export function createClient() {
  const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL
  const supabaseAnonKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY

  // During build/prerendering, env vars may not be available
  // Return a placeholder that will be replaced at runtime
  if (!supabaseUrl || !supabaseAnonKey) {
    if (typeof window === 'undefined') {
      // Server-side during build - return a mock that won't be used
      return null as any
    }
    throw new Error('Missing Supabase environment variables')
  }

  return createBrowserClient(supabaseUrl, supabaseAnonKey)
}