var auth = (function(){
  var auth = {}

  auth.appname = is_iphone ? "bucky-web/3.0.0" : "bucky-web/3.0.0"
  auth.apikey = "influssiblefraubuzzardsunsetideogrammatton"
  auth.device = "browser"

  auth.user = {id:-1}
  
  auth.next_view = null
  
  auth.init = function(fn){
    // if we're on an authentication page, ignore the current user
    if (window.location.pathname === '/login' || window.location.pathname === '/signup') {
      fn && fn( false )
      return
    }
    auth.load_user(function(user){
      var logged_in = auth.logged_in()
      if (logged_in) {
        fn && fn()
        return
      }
      auth.checkin({
        success: function(user){
          if (user) {
            auth.set_user(user, fn)
          }
        },
        error: function(){
          window.location.href = "/login"
        }
      })
    })
  }
  auth.get_user = function(cb){
    cb && cb(auth.user)
  }
  auth.set_user = function(user, cb){
    auth.user = user
    localStorage.setItem("bucky.user", JSON.stringify(user))
    cb && cb()
  }
  auth.load_user = function(cb){
    var user
    var user_str = localStorage.getItem("bucky.user")
    if (user_str && user_str.length) {
      try {
        user = JSON.parse(user_str)
        if (! user.id) user = {id:-1}
      } catch(e) {
        user = {id:-1}
      }
    }
    auth.user = user
    cb && cb(user)
  }
  auth.clear_user = function(cb){
    auth.user = {id:-1}
    localStorage.removeItem("bucky.user")
    cb && cb()
  }
  auth.log_out = function(){
    auth.clear_user()
  }
  auth.logged_in = function(){
    return (auth.user && auth.user.id && auth.user.id !== -1 && auth.user.id !== "undefined")
  }
  auth.checkin = function(opt){
    $.ajax({
      method: 'put',
      url: '/api/checkin',
      headers: { "csrf-token": $("[name=_csrf]").attr("value") },
      success: function(data){
        if (data && data.user && data.user.id && data.user.id !== -1) {
          auth.set_user(data.user)
          opt.success(data.user)
          return
        }
        opt.error()
      },
      error: function(){
        window.location.href = '/login'
        opt.error()
      },
    })
  }
  
  return auth
})()