app = require 'application'
utils = require 'lib/utils'
Defects = require 'collections/defects'
PortfolioItems = require 'collections/portfolio_items'
Tasks = require 'collections/tasks'
UserStories = require 'collections/user_stories'
Defect = require 'models/defect'
PortfolioItem = require 'models/portfolio_item'
UserStory = require 'models/user_story'
SiteController = require 'controllers/base/site_controller'
AssociationsView = require 'views/associations/associations'

associationClasses =
  Defects: Defects
  Tasks: Tasks
  Children: UserStories
  UserStories: UserStories

module.exports = class AssociationsController extends SiteController
  childrenForStory: (id) ->
    @_createAssociationView(new UserStory(_refObjectUUID: id, _type: 'hierarchicalrequirement'), 'Children', 'Parent')

  defectsForStory: (id) ->
    @_createAssociationView(new UserStory(_refObjectUUID: id, _type: 'hierarchicalrequirement'), 'Defects', 'Requirement')

  tasksForStory: (id) ->
    @_createAssociationView(new UserStory(_refObjectUUID: id, _type: 'hierarchicalrequirement'), 'Tasks', 'WorkProduct')

  tasksForDefect: (id) ->
    @_createAssociationView(new Defect(_refObjectUUID: id, _type: 'defect'), 'Tasks', 'WorkProduct')

  userStoriesForPortfolioItem: (id) ->
    @_createAssociationView(new PortfolioItem(_refObjectUUID: id, _type: 'portfolioitem'), 'UserStories', 'PortfolioItem')

  childrenForPortfolioItem: (id) ->
    @_createAssociationView(new PortfolioItem(_refObjectUUID: id, _type: 'portfolioitem'), 'Children', 'Parent')

  _createAssociationView: (model, association, reverseAssociation) ->
    associatedItems = @_getAssociatedCollection(model, association)

    @whenProjectIsLoaded().then =>
      
      @_fetchAssociation model, associatedItems, association, reverseAssociation

      @renderReactComponent AssociationsView,
        region: 'main'
        associatedItems: associatedItems
        association: association
        fromModel: model

  _fetchAssociation: (model, associatedItems, association, reverseAssociation) ->
    model.clientMetricsParent = this
    model.fetch
      data:
        fetch: 'FormattedID'
      success: (model, response, opts) =>
        @updateTitle "#{association} for #{model.get('FormattedID')}: #{model.get('_refObjectName')}"
        associatedItems.fetch
          data:
            shallowFetch: "Blocked,FormattedID,Name,Ready,ScheduleState,State,ToDo,Iteration,Release"
            query: "(#{reverseAssociation} = \"#{model.get('_ref')}\")"
            order: 'Rank ASC'
          success: =>
            @markFinished()

  _getAssociatedCollection: (model, association) ->
    if (model.get('_type') == 'portfolioitem' && association == 'Children')
      cls = PortfolioItems
    else
      cls = associationClasses[association]

    coll = new cls()
    coll.clientMetricsParent = this
    coll