import { find, findIndex, extend } from 'lodash'

function addNotification(notifications, id, props) {
  const index = findIndex(notifications, o => o.id === id)
  if (index !== -1) {
    console.error(`Can't add notification: ${id} already exists`)
    return notifications
  }
  return notifications.concat([{ id, children: props.children || [], ...props }])
}

function updateNotification(notifications, id, props) {
  return notifications.map(o => {
    if (o.id !== id) {
      return o
    }

    return extend({}, o, props)
  })
}

function getNotification(notifications, id) {
  return find(notifications, o => o.id === id)
}

function removeNotification(notifications, id) {
  return notifications.filter(o => o.id !== id)
}

function addChild(notificationChildren, id, element) {
  return notificationChildren.concat([{ id, element }])
}

function removeChild(notificationChildren, id) {
  return notificationChildren.filter(o => o.id !== id)
}

function updateChild(notificationChildren, id, element) {
  return notificationChildren.map(o => {
    if (o.id !== id) {
      return o
    }

    return extend({}, o, { id, ...element })
  })
}

function getChild(notificationChildren, id) {
  return find(notificationChildren, o => o.id === id)
}

export default {
  addNotification,
  updateNotification,
  removeNotification,
  getNotification,
  addChild,
  removeChild,
  updateChild,
  getChild
}