const BASE = '/api'

// ─── Token helpers ────────────────────────────────────────────────────────────

export function getToken()          { return localStorage.getItem('token') }
export function setToken(t)         { t ? localStorage.setItem('token', t) : localStorage.removeItem('token') }

function authHeaders(extra = {}) {
  const token = getToken()
  return token
    ? { 'Content-Type': 'application/json', Authorization: `Bearer ${token}`, ...extra }
    : { 'Content-Type': 'application/json', ...extra }
}

async function handleResponse(res) {
  if (res.status === 401) {
    setToken(null)
    window.dispatchEvent(new Event('auth:expired'))
    throw new Error('Session expirée, veuillez vous reconnecter.')
  }
  if (!res.ok) {
    const err = await res.json().catch(() => ({}))
    throw new Error(err.detail ?? `HTTP ${res.status}`)
  }
  return res.json()
}

// ─── Auth ─────────────────────────────────────────────────────────────────────

export async function authStatus() {
  const res = await fetch(`${BASE}/auth/status`)
  return handleResponse(res)
}

export async function register(username, password) {
  const res = await fetch(`${BASE}/auth/register`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ username, password }),
  })
  return handleResponse(res)
}

export async function login(username, password) {
  const res = await fetch(`${BASE}/auth/login`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ username, password }),
  })
  return handleResponse(res)
}

// ─── VPS ──────────────────────────────────────────────────────────────────────

export async function fetchAllStatus() {
  const res = await fetch(`${BASE}/status`, { headers: authHeaders() })
  return handleResponse(res)
}

export async function fetchLogs(vpsId, containerId, lines = 200) {
  const res = await fetch(
    `${BASE}/vps/${vpsId}/containers/${containerId}/logs?lines=${lines}`,
    { headers: authHeaders() }
  )
  return handleResponse(res)
}

export async function containerAction(vpsId, containerId, action) {
  const res = await fetch(`${BASE}/vps/${vpsId}/containers/${containerId}/action`, {
    method: 'POST',
    headers: authHeaders(),
    body: JSON.stringify({ action }),
  })
  return handleResponse(res)
}

export async function addVps(data) {
  const res = await fetch(`${BASE}/vps`, {
    method: 'POST',
    headers: authHeaders(),
    body: JSON.stringify(data),
  })
  return handleResponse(res)
}

export async function deleteVps(vpsId) {
  const res = await fetch(`${BASE}/vps/${vpsId}`, {
    method: 'DELETE',
    headers: authHeaders(),
  })
  return handleResponse(res)
}

export async function composeUpdate(vpsId, project) {
  const res = await fetch(`${BASE}/vps/${vpsId}/compose/update`, {
    method: 'POST',
    headers: authHeaders(),
    body: JSON.stringify({ project }),
  })
  return handleResponse(res)
}

export async function updateVps(vpsId, data) {
  const res = await fetch(`${BASE}/vps/${vpsId}`, {
    method: 'PUT',
    headers: authHeaders(),
    body: JSON.stringify(data),
  })
  return handleResponse(res)
}