import fetch from 'node-fetch'

export function crud(type_s, tag) {
  const type = '/' + type_s + 's/' + (tag || '')
  return {
    index: (data) => {
      return fetch(_get_url(type, data), _get_headers())
        .then(req => req.json())
        .catch(error)
    },
    
    show: (id) => {
      return fetch(type + id)
        .then(req => req.json())
        .catch(error)
    },
    
    create: (data) => {
      return fetch(type, post(data))
        .then(req => req.json())
        .catch(error)
    },

    update: (data) => {
      return fetch(type + data.id, put(data))
        .then(req => req.json())
        .catch(error)
    },

    destroy: (data) => {
      return fetch(type + data.id, destroy(data))
        .then(req => req.json())
        .catch(error)
    },

    under: function(tag){
      return crud(type_s, tag)
    },
  }
}

function _get_url(_url, data) {
  const url = new URL(window.location.origin + _url)
  if (data) {
    Object.keys(data).forEach(key => url.searchParams.append(key, data[key]))
  }
  return url
}
function _get_headers() {
  return {
    method: 'GET',
    headers: {
      'Accept': 'application/json',
    },
  }
}
function post(data) {
  return {
    method: 'POST',
    body: JSON.stringify(data),
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json'
    },
  }
}
export function postBody(data) {
  return {
    method: 'POST',
    body: data,
    headers: {
      'Accept': 'application/json',
    },
  }
}
function put(data) {
  return {
    method: 'PUT',
    body: JSON.stringify(data),
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json'
    },
  }
}
function destroy(data) {
  return {
    method: 'DELETE',
    body: JSON.stringify(data),
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'application/json'
    },
  }
}
function error(err) {
  console.warn(err)
}