const API_BASE = '/api'

export interface Machine {
  id: string
  name: string
  url: string
  version: string
  skills: string[]
  status: 'running' | 'stopped' | 'unknown'
  lastSeen: number
}

export async function fetchMachines(): Promise<Machine[]> {
  const res = await fetch(`${API_BASE}/machines`)
  if (!res.ok) throw new Error('Failed to fetch machines')
  return res.json()
}

export async function fetchMachine(id: string): Promise<Machine> {
  const res = await fetch(`${API_BASE}/machines/${id}`)
  if (!res.ok) throw new Error('Failed to fetch machine')
  return res.json()
}

export async function deleteMachine(id: string): Promise<void> {
  const res = await fetch(`${API_BASE}/machines/${id}`, { method: 'DELETE' })
  if (!res.ok) throw new Error('Failed to delete machine')
}

export async function registerMachine(machine: Omit<Machine, 'lastSeen'>): Promise<Machine> {
  const res = await fetch(`${API_BASE}/machines/register`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(machine),
  })
  if (!res.ok) throw new Error('Failed to register machine')
  return res.json()
}

// Calculate time since last seen
export function timeSince(timestamp: number): string {
  const seconds = Math.floor(Date.now() / 1000 - timestamp)
  if (seconds < 60) return `${seconds}s ago`
  if (seconds < 3600) return `${Math.floor(seconds / 60)}m ago`
  if (seconds < 86400) return `${Math.floor(seconds / 3600)}h ago`
  return `${Math.floor(seconds / 86400)}d ago`
}