$(document).ready(function() {

  function render_host_link(data) {
    // render funtion to create link to Host view page
    if ( data === null ) {
      return data;
    }
    var url = $SCRIPT_ROOT + "/network/hosts/view/" + data;
    return '<a href="'+ url + '">' + data + '</a>';
  }

  function render_network_link(data) {
    // render funtion to create link to Network view page
    if ( data === null ) {
      return data;
    }
    var url = $SCRIPT_ROOT + "/network/networks/view/" + data;
    return '<a href="'+ url + '">' + data + '</a>';
  }

  if( $("#hostForm").length || $("#editHostForm").length ) {
    var hostVarsEditor = CodeMirror.fromTextArea(ansible_vars, {
        lineNumbers: true,
        mode: "yaml"
    });
    hostVarsEditor.setSize(null, 120);
    var handle = cmResize(hostVarsEditor, {
      minHeight: 120,
      resizableWidth: false,
      resizableHeight: true,
    });
  }

  function set_default_ip() {
    // Retrieve the first available IP for the selected network
    // and update the IP field
    var network_id = $("#network_id").val();
    if ( network_id !== "" ) {
      $("#ip").removeClass("is-invalid");
      $.getJSON(
        $SCRIPT_ROOT + "/network/_retrieve_first_available_ip/" + network_id,
        function(json) {
          $("#ip").val(json.data);
        }
      );
    }
  }

  // And check / uncheck random_mac checkbox
  function update_device_type_attributes() {
    var device_type = $("#device_type_id option:selected").text();
    if( device_type.startsWith("Virtual") ) {
      $("#random_mac").prop("checked", true).change();
    } else {
      $("#random_mac").prop("checked", false).change();
    }
  }

  // If random_mac is checked, generate a random address
  // Empty the field otherwise
  function fill_mac_address() {
    if( $("#random_mac").prop("checked") ) {
      $.getJSON(
        $SCRIPT_ROOT + "/network/_generate_random_mac",
        function(json) {
          $("#mac").val(json.data.mac);
          $("#mac").prop("readonly", true);
        }
      );
    } else {
      $("#mac").val("");
      $("#mac").prop("readonly", false);
    }
  }

  // Set the default IP on first page load for:
  // - register new host
  // - add interface
  // Do NOT replace the IP on edit interface page load!
  // (we have to keep the existing IP)
  // Do NOT replace the IP if the form was submitted and an error was raised
  // (we should display the same value that was submitted)
  if( ($("#hostForm").length || $("#interfaceForm").length) && ! $("input").hasClass("is-invalid") ) {
    set_default_ip();
  }

  // On page load if the network_id is invalid, it's because an empty entry was submitted
  // remove the default value to make it clear
  if( ($("#hostForm").length || $("#interfaceForm").length) && $("#network_id").hasClass("is-invalid") ) {
    var network_id_selectize = $("#network_id")[0].selectize;
    network_id_selectize.clear(true);
  }

  // Clear the default value so that the user can start typing directly
  // or click a dropdown item
  $("#network_id").next(".selectize-control").on( 'click', function () {
    var network_id_selectize = $("#network_id")[0].selectize;
    network_id_selectize.clear(true);
  });

  // Set the default IP when changing network
  $("#network_id").on('change', function() {
    $(this).removeClass("is-invalid");
    $(this).next(".selectize-control").removeClass("is-invalid");
    set_default_ip();
  });

  // Only for register new host form
  if( $("#hostForm").length ) {
    // On first page load
    update_device_type_attributes();

    // And change
    $("#device_type_id").on('change', function() {
      update_device_type_attributes();
    });
  }

  // Fill MAC address on page load
  if( $("#random_mac").length ) {
    fill_mac_address();
  }

  // Fill or clear MAC address depending on random_mac checkbox
  $("#random_mac").on('change', function() {
    fill_mac_address();
  });

  var hosts_table =  $("#hosts_table").DataTable({
    dom: "<'row'<'col-sm-12 col-md-6'l><'col-sm-12 col-md-3 text-right'><'col-sm-12 col-md-3'f>>" +
    "<'row'<'col-sm-12'tr>>" +
    "<'row'<'col-sm-12 col-md-5'i><'col-sm-12 col-md-7'p>>",
    "ajax": {
      "url": $SCRIPT_ROOT + "/network/_retrieve_hosts",
      "type": "POST"
    },
    "processing": true,
    "serverSide": true,
    "searchDelay": 500,
    "stateSave": true,
    "orderMulti": false,
    "aaSorting": [],
    "pagingType": "full_numbers",
    "pageLength": 20,
    "lengthMenu": [[20, 50, 100], [20, 50, 100]],
    "columns": [
      { data: 'name',
        render: function(data, type, row) {
          return render_host_link(data);
        }
      },
      { data: 'device_type' },
      { data: 'description',
        orderable: false },
      { data: 'interfaces.0.ip',
        defaultContent: "",
        orderable: false },
      { data: 'interfaces.0.network',
        render: function(data, type, row) {
          return render_network_link(data);
        },
        defaultContent: "",
        orderable: false }
    ]
  });

  if( $("#hosts_table").length ) {
    new $.fn.dataTable.Buttons(hosts_table, {
      buttons: [
        {
          text: 'Reset',
          className: "btn-outline-secondary",
          action: function ( e, dt, node, conf ) {
            dt.state.clear();
            dt.search('').order([]).draw();
          }
        }
      ]
    });

    hosts_table.buttons().container().appendTo("#hosts_table_wrapper .col-md-3:eq(0)");
  }

});