const API_BASE_URL = '/api/v1'

export interface ApiResponse<T = unknown> {
  code: number
  msg: string
  payload: T | null
}

export interface DemoResponse {
  sleep_time_ms: number
}

export function callDemoApi(): Promise<ApiResponse<DemoResponse>> {
  return fetch(`${API_BASE_URL}/demo`)
    .then((response) => {
      if (!response.ok) {
        throw new Error(`HTTP error! status: ${response.status}`)
      }
      return response.json() as Promise<ApiResponse<DemoResponse>>
    })
}