import { inject as service } from '@ember/service';
import { alias, and, equal, gte, not, or } from '@ember/object/computed';
import { get, computed } from '@ember/object';
import DS from 'ember-data';
import { fragment } from 'ember-data-model-fragments/attributes';
const { hasMany, attr } = DS;

export default DS.Model.extend({
  version: service(),

  nodes: hasMany('nodes', { async: false }),
  name: attr('string'),
  status: attr('string'),
  standby: attr('boolean'),
  type: attr('string'),

  needsInit: computed('nodes', 'nodes.@each.initialized', function() {
    // needs init if no nodes are initialized
    return this.get('nodes').isEvery('initialized', false);
  }),

  unsealed: computed('nodes', 'nodes.{[],@each.sealed}', function() {
    // unsealed if there's at least one unsealed node
    return !!this.get('nodes').findBy('sealed', false);
  }),

  sealed: not('unsealed'),

  leaderNode: computed('nodes', 'nodes.[]', function() {
    const nodes = this.get('nodes');
    if (nodes.get('length') === 1) {
      return nodes.get('firstObject');
    } else {
      return nodes.findBy('isLeader');
    }
  }),

  sealThreshold: alias('leaderNode.sealThreshold'),
  sealProgress: alias('leaderNode.progress'),
  sealType: alias('leaderNode.type'),
  storageType: alias('leaderNode.storageType'),
  hasProgress: gte('sealProgress', 1),
  usingRaft: equal('storageType', 'raft'),

  //replication mode - will only ever be 'unsupported'
  //otherwise the particular mode will have the relevant mode attr through replication-attributes
  mode: attr('string'),
  allReplicationDisabled: and('{dr,performance}.replicationDisabled'),
  anyReplicationEnabled: or('{dr,performance}.replicationEnabled'),

  dr: fragment('replication-attributes'),
  performance: fragment('replication-attributes'),
  // this service exposes what mode the UI is currently viewing
  // replicationAttrs will then return the relevant `replication-attributes` fragment
  rm: service('replication-mode'),
  drMode: alias('dr.mode'),
  replicationMode: alias('rm.mode'),
  replicationModeForDisplay: computed('replicationMode', function() {
    return this.replicationMode === 'dr' ? 'Disaster Recovery' : 'Performance';
  }),
  replicationIsInitializing: computed('dr.mode', 'performance.mode', function() {
    // a mode of null only happens when a cluster is being initialized
    // otherwise the mode will be 'disabled', 'primary', 'secondary'
    return !this.dr.mode || !this.performance.mode;
  }),
  replicationAttrs: computed('dr.mode', 'performance.mode', 'replicationMode', function() {
    const replicationMode = this.get('replicationMode');
    return replicationMode ? get(this, replicationMode) : null;
  }),
});