angular.module('portainer.docker').controller('SwarmController', [
  '$q',
  '$scope',
  'SystemService',
  'NodeService',
  'Notifications',
  'StateManager',
  'Authentication',
  function ($q, $scope, SystemService, NodeService, Notifications, StateManager, Authentication) {
    $scope.info = {};
    $scope.docker = {};
    $scope.swarm = {};
    $scope.totalCPU = 0;
    $scope.totalMemory = 0;

    function extractSwarmInfo(info) {
      // Swarm info is available in SystemStatus object
      var systemStatus = info.SystemStatus;
      // Swarm strategy
      $scope.swarm[systemStatus[1][0]] = systemStatus[1][1];
      // Swarm filters
      $scope.swarm[systemStatus[2][0]] = systemStatus[2][1];
      // Swarm node count
      var nodes = systemStatus[0][1] === 'primary' ? systemStatus[3][1] : systemStatus[4][1];
      var node_count = parseInt(nodes, 10);
      $scope.swarm[systemStatus[3][0]] = node_count;

      $scope.swarm.Status = [];
      extractNodesInfo(systemStatus, node_count);
    }

    function extractNodesInfo(info, node_count) {
      // First information for node1 available at element #4 of SystemStatus if connected to a primary
      // If connected to a replica, information for node1 is available at element #5
      // The next 10 elements are information related to the node
      var node_offset = info[0][1] === 'primary' ? 4 : 5;
      for (let i = 0; i < node_count; i++) {
        extractNodeInfo(info, node_offset);
        node_offset += 9;
      }
    }

    function extractNodeInfo(info, offset) {
      var node = {};
      node.name = info[offset][0];
      node.ip = info[offset][1];
      node.Id = info[offset + 1][1];
      node.status = info[offset + 2][1];
      node.containers = info[offset + 3][1];
      node.cpu = info[offset + 4][1].split('/')[1];
      node.memory = info[offset + 5][1].split('/')[1];
      node.labels = info[offset + 6][1];
      node.version = info[offset + 8][1];
      $scope.swarm.Status.push(node);
    }

    function processTotalCPUAndMemory(nodes) {
      var CPU = 0,
        memory = 0;
      angular.forEach(nodes, function (node) {
        CPU += node.CPUs;
        memory += node.Memory;
      });
      $scope.totalCPU = CPU / 1000000000;
      $scope.totalMemory = memory;
    }

    $scope.getNodes = getNodes;
    function getNodes() {
      var provider = $scope.applicationState.endpoint.mode.provider;
      if (provider === 'DOCKER_SWARM_MODE') {
        NodeService.nodes()
          .then(function (data) {
            var nodes = data;
            processTotalCPUAndMemory(nodes);
            $scope.nodes = nodes;
          })
          .catch(function error(err) {
            Notifications.error('Failure', err, 'Unable to retrieve cluster details');
          });
      }
    }

    function initView() {
      if (StateManager.getState().application.authentication) {
        $scope.isAdmin = Authentication.isAdmin();
      }

      var provider = $scope.applicationState.endpoint.mode.provider;
      $q.all({
        version: SystemService.version(),
        info: SystemService.info(),
      })
        .then(function success(data) {
          $scope.docker = data.version;
          $scope.info = data.info;
          if (provider === 'DOCKER_SWARM_MODE') {
            getNodes();
          } else {
            extractSwarmInfo(data.info);
          }
        })
        .catch(function error(err) {
          Notifications.error('Failure', err, 'Unable to retrieve cluster details');
        });
    }

    initView();
  },
]);