module API
  class Services < Grape::API
    chat_notification_settings = [
      {
        required: true,
        name: :webhook,
        type: String,
        desc: 'The chat webhook'
      },
      {
        required: false,
        name: :username,
        type: String,
        desc: 'The chat username'
      },
      {
        required: false,
        name: :channel,
        type: String,
        desc: 'The default chat channel'
      }
    ]

    chat_notification_flags = [
      {
        required: false,
        name: :notify_only_broken_pipelines,
        type: Boolean,
        desc: 'Send notifications for broken pipelines'
      },
      {
        required: false,
        name: :notify_only_default_branch,
        type: Boolean,
        desc: 'Send notifications only for the default branch'
      }
    ]

    chat_notification_channels = [
      {
        required: false,
        name: :push_channel,
        type: String,
        desc: 'The name of the channel to receive push_events notifications'
      },
      {
        required: false,
        name: :issue_channel,
        type: String,
        desc: 'The name of the channel to receive issues_events notifications'
      },
      {
        required: false,
        name: :confidential_issue_channel,
        type: String,
        desc: 'The name of the channel to receive confidential_issues_events notifications'
      },
      {
        required: false,
        name: :merge_request_channel,
        type: String,
        desc: 'The name of the channel to receive merge_requests_events notifications'
      },
      {
        required: false,
        name: :note_channel,
        type: String,
        desc: 'The name of the channel to receive note_events notifications'
      },
      {
        required: false,
        name: :tag_push_channel,
        type: String,
        desc: 'The name of the channel to receive tag_push_events notifications'
      },
      {
        required: false,
        name: :pipeline_channel,
        type: String,
        desc: 'The name of the channel to receive pipeline_events notifications'
      },
      {
        required: false,
        name: :wiki_page_channel,
        type: String,
        desc: 'The name of the channel to receive wiki_page_events notifications'
      }
    ]

    chat_notification_events = [
      {
        required: false,
        name: :push_events,
        type: Boolean,
        desc: 'Enable notifications for push_events'
      },
      {
        required: false,
        name: :issues_events,
        type: Boolean,
        desc: 'Enable notifications for issues_events'
      },
      {
        required: false,
        name: :confidential_issues_events,
        type: Boolean,
        desc: 'Enable notifications for confidential_issues_events'
      },
      {
        required: false,
        name: :merge_requests_events,
        type: Boolean,
        desc: 'Enable notifications for merge_requests_events'
      },
      {
        required: false,
        name: :note_events,
        type: Boolean,
        desc: 'Enable notifications for note_events'
      },
      {
        required: false,
        name: :tag_push_events,
        type: Boolean,
        desc: 'Enable notifications for tag_push_events'
      },
      {
        required: false,
        name: :pipeline_events,
        type: Boolean,
        desc: 'Enable notifications for pipeline_events'
      },
      {
        required: false,
        name: :wiki_page_events,
        type: Boolean,
        desc: 'Enable notifications for wiki_page_events'
      }
    ]

    services = {
      'asana' => [
        {
          required: true,
          name: :api_key,
          type: String,
          desc: 'User API token'
        },
        {
          required: false,
          name: :restrict_to_branch,
          type: String,
          desc: 'Comma-separated list of branches which will be automatically inspected. Leave blank to include all branches'
        }
      ],
      'assembla' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'The authentication token'
        },
        {
          required: false,
          name: :subdomain,
          type: String,
          desc: 'Subdomain setting'
        }
      ],
      'bamboo' => [
        {
          required: true,
          name: :bamboo_url,
          type: String,
          desc: 'Bamboo root URL like https://bamboo.example.com'
        },
        {
          required: true,
          name: :build_key,
          type: String,
          desc: 'Bamboo build plan key like'
        },
        {
          required: true,
          name: :username,
          type: String,
          desc: 'A user with API access, if applicable'
        },
        {
          required: true,
          name: :password,
          type: String,
          desc: 'Passord of the user'
        }
      ],
      'bugzilla' => [
        {
          required: true,
          name: :new_issue_url,
          type: String,
          desc: 'New issue URL'
        },
        {
          required: true,
          name: :issues_url,
          type: String,
          desc: 'Issues URL'
        },
        {
          required: true,
          name: :project_url,
          type: String,
          desc: 'Project URL'
        },
        {
          required: false,
          name: :description,
          type: String,
          desc: 'Description'
        },
        {
          required: false,
          name: :title,
          type: String,
          desc: 'Title'
        }
      ],
      'buildkite' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'Buildkite project GitLab token'
        },
        {
          required: true,
          name: :project_url,
          type: String,
          desc: 'The buildkite project URL'
        },
        {
          required: false,
          name: :enable_ssl_verification,
          type: Boolean,
          desc: 'Enable SSL verification for communication'
        }
      ],
      'campfire' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'Campfire token'
        },
        {
          required: false,
          name: :subdomain,
          type: String,
          desc: 'Campfire subdomain'
        },
        {
          required: false,
          name: :room,
          type: String,
          desc: 'Campfire room'
        }
      ],
      'custom-issue-tracker' => [
        {
          required: true,
          name: :new_issue_url,
          type: String,
          desc: 'New issue URL'
        },
        {
          required: true,
          name: :issues_url,
          type: String,
          desc: 'Issues URL'
        },
        {
          required: true,
          name: :project_url,
          type: String,
          desc: 'Project URL'
        },
        {
          required: false,
          name: :description,
          type: String,
          desc: 'Description'
        },
        {
          required: false,
          name: :title,
          type: String,
          desc: 'Title'
        }
      ],
      'drone-ci' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'Drone CI token'
        },
        {
          required: true,
          name: :drone_url,
          type: String,
          desc: 'Drone CI URL'
        },
        {
          required: false,
          name: :enable_ssl_verification,
          type: Boolean,
          desc: 'Enable SSL verification for communication'
        }
      ],
      'emails-on-push' => [
        {
          required: true,
          name: :recipients,
          type: String,
          desc: 'Comma-separated list of recipient email addresses'
        },
        {
          required: false,
          name: :disable_diffs,
          type: Boolean,
          desc: 'Disable code diffs'
        },
        {
          required: false,
          name: :send_from_committer_email,
          type: Boolean,
          desc: 'Send from committer'
        }
      ],
      'external-wiki' => [
        {
          required: true,
          name: :external_wiki_url,
          type: String,
          desc: 'The URL of the external Wiki'
        }
      ],
      'flowdock' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'Flowdock token'
        }
      ],
      'gemnasium' => [
        {
          required: true,
          name: :api_key,
          type: String,
          desc: 'Your personal API key on gemnasium.com'
        },
        {
          required: true,
          name: :token,
          type: String,
          desc: "The project's slug on gemnasium.com"
        }
      ],
      'hipchat' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'The room token'
        },
        {
          required: false,
          name: :room,
          type: String,
          desc: 'The room name or ID'
        },
        {
          required: false,
          name: :color,
          type: String,
          desc: 'The room color'
        },
        {
          required: false,
          name: :notify,
          type: Boolean,
          desc: 'Enable notifications'
        },
        {
          required: false,
          name: :api_version,
          type: String,
          desc: 'Leave blank for default (v2)'
        },
        {
          required: false,
          name: :server,
          type: String,
          desc: 'Leave blank for default. https://hipchat.example.com'
        }
      ],
      'irker' => [
        {
          required: true,
          name: :recipients,
          type: String,
          desc: 'Recipients/channels separated by whitespaces'
        },
        {
          required: false,
          name: :default_irc_uri,
          type: String,
          desc: 'Default: irc://irc.network.net:6697'
        },
        {
          required: false,
          name: :server_host,
          type: String,
          desc: 'Server host. Default localhost'
        },
        {
          required: false,
          name: :server_port,
          type: Integer,
          desc: 'Server port. Default 6659'
        },
        {
          required: false,
          name: :colorize_messages,
          type: Boolean,
          desc: 'Colorize messages'
        }
      ],
      'jira' => [
        {
          required: true,
          name: :url,
          type: String,
          desc: 'The base URL to the JIRA instance web interface which is being linked to this GitLab project. E.g., https://jira.example.com'
        },
        {
          required: false,
          name: :api_url,
          type: String,
          desc: 'The base URL to the JIRA instance API. Web URL value will be used if not set. E.g., https://jira-api.example.com'
        },
        {
          required: true,
          name: :username,
          type: String,
          desc: 'The username of the user created to be used with GitLab/JIRA'
        },
        {
          required: true,
          name: :password,
          type: String,
          desc: 'The password of the user created to be used with GitLab/JIRA'
        },
        {
          required: false,
          name: :jira_issue_transition_id,
          type: Integer,
          desc: 'The ID of a transition that moves issues to a closed state. You can find this number under the JIRA workflow administration (**Administration > Issues > Workflows**) by selecting **View** under **Operations** of the desired workflow of your project. The ID of each state can be found inside the parenthesis of each transition name under the **Transitions (id)** column ([see screenshot][trans]). By default, this ID is set to `2`'
        }
      ],

      'kubernetes' => [
        {
          required: true,
          name: :namespace,
          type: String,
          desc: 'The Kubernetes namespace to use'
        },
        {
          required: true,
          name: :api_url,
          type: String,
          desc: 'The URL to the Kubernetes cluster API, e.g., https://kubernetes.example.com'
        },
        {
          required: true,
          name: :token,
          type: String,
          desc: 'The service token to authenticate against the Kubernetes cluster with'
        },
        {
          required: false,
          name: :ca_pem,
          type: String,
          desc: 'A custom certificate authority bundle to verify the Kubernetes cluster with (PEM format)'
        }
      ],
      'mattermost-slash-commands' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'The Mattermost token'
        }
      ],
      'slack-slash-commands' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'The Slack token'
        }
      ],
      'packagist' => [
        {
          required: true,
          name: :username,
          type: String,
          desc: 'The username'
        },
        {
          required: true,
          name: :token,
          type: String,
          desc: 'The Packagist API token'
        },
        {
          required: false,
          name: :server,
          type: String,
          desc: 'The server'
        }
      ],
      'pipelines-email' => [
        {
          required: true,
          name: :recipients,
          type: String,
          desc: 'Comma-separated list of recipient email addresses'
        },
        {
          required: false,
          name: :notify_only_broken_pipelines,
          type: Boolean,
          desc: 'Notify only broken pipelines'
        }
      ],
      'pivotaltracker' => [
        {
          required: true,
          name: :token,
          type: String,
          desc: 'The Pivotaltracker token'
        },
        {
          required: false,
          name: :restrict_to_branch,
          type: String,
          desc: 'Comma-separated list of branches which will be automatically inspected. Leave blank to include all branches.'
        }
      ],
      'prometheus' => [
        {
          required: true,
          name: :api_url,
          type: String,
          desc: 'Prometheus API Base URL, like http://prometheus.example.com/'
        }
      ],
      'pushover' => [
        {
          required: true,
          name: :api_key,
          type: String,
          desc: 'The application key'
        },
        {
          required: true,
          name: :user_key,
          type: String,
          desc: 'The user key'
        },
        {
          required: true,
          name: :priority,
          type: String,
          desc: 'The priority'
        },
        {
          required: true,
          name: :device,
          type: String,
          desc: 'Leave blank for all active devices'
        },
        {
          required: true,
          name: :sound,
          type: String,
          desc: 'The sound of the notification'
        }
      ],
      'redmine' => [
        {
          required: true,
          name: :new_issue_url,
          type: String,
          desc: 'The new issue URL'
        },
        {
          required: true,
          name: :project_url,
          type: String,
          desc: 'The project URL'
        },
        {
          required: true,
          name: :issues_url,
          type: String,
          desc: 'The issues URL'
        },
        {
          required: false,
          name: :description,
          type: String,
          desc: 'The description of the tracker'
        }
      ],
      'slack' => [
        chat_notification_settings,
        chat_notification_flags,
        chat_notification_channels,
        chat_notification_events
      ].flatten,
      'microsoft-teams' => [
        {
          required: true,
          name: :webhook,
          type: String,
          desc: 'The Microsoft Teams webhook. e.g. https://outlook.office.com/webhook/…'
        }
      ],
      'mattermost' => [
        chat_notification_settings,
        chat_notification_flags,
        chat_notification_channels,
        chat_notification_events
      ].flatten,
      'teamcity' => [
        {
          required: true,
          name: :teamcity_url,
          type: String,
          desc: 'TeamCity root URL like https://teamcity.example.com'
        },
        {
          required: true,
          name: :build_type,
          type: String,
          desc: 'Build configuration ID'
        },
        {
          required: true,
          name: :username,
          type: String,
          desc: 'A user with permissions to trigger a manual build'
        },
        {
          required: true,
          name: :password,
          type: String,
          desc: 'The password of the user'
        }
      ]
    }

    service_classes = [
      AsanaService,
      AssemblaService,
      BambooService,
      BugzillaService,
      BuildkiteService,
      CampfireService,
      CustomIssueTrackerService,
      DroneCiService,
      EmailsOnPushService,
      ExternalWikiService,
      FlowdockService,
      GemnasiumService,
      HipchatService,
      IrkerService,
      JiraService,
      KubernetesService,
      MattermostSlashCommandsService,
      SlackSlashCommandsService,
      PackagistService,
      PipelinesEmailService,
      PivotaltrackerService,
      PrometheusService,
      PushoverService,
      RedmineService,
      SlackService,
      MattermostService,
      MicrosoftTeamsService,
      TeamcityService
    ]

    if Rails.env.development?
      services['mock-ci'] = [
        {
          required: true,
          name: :mock_service_url,
          type: String,
          desc: 'URL to the mock service'
        }
      ]
      services['mock-deployment'] = []
      services['mock-monitoring'] = []

      service_classes += [
        MockCiService,
        MockDeploymentService,
        MockMonitoringService
      ]
    end

    trigger_services = {
      'mattermost-slash-commands' => [
        {
          name: :token,
          type: String,
          desc: 'The Mattermost token'
        }
      ],
      'slack-slash-commands' => [
        {
          name: :token,
          type: String,
          desc: 'The Slack token'
        }
      ]
    }.freeze

    params do
      requires :id, type: String, desc: 'The ID of a project'
    end
    resource :projects, requirements: API::PROJECT_ENDPOINT_REQUIREMENTS  do
      before { authenticate! }
      before { authorize_admin_project }

      helpers do
        def service_attributes(service)
          service.fields.inject([]) do |arr, hash|
            arr << hash[:name].to_sym
          end
        end
      end

      services.each do |service_slug, settings|
        desc "Set #{service_slug} service for project"
        params do
          service_classes.each do |service|
            event_names = service.try(:event_names) || next
            event_names.each do |event_name|
              services[service.to_param.tr("_", "-")] << {
                required: false,
                name: event_name.to_sym,
                type: String,
                desc: ServicesHelper.service_event_description(event_name)
              }
            end
          end
          services.freeze

          settings.each do |setting|
            if setting[:required]
              requires setting[:name], type: setting[:type], desc: setting[:desc]
            else
              optional setting[:name], type: setting[:type], desc: setting[:desc]
            end
          end
        end
        put ":id/services/#{service_slug}" do
          service = user_project.find_or_initialize_service(service_slug.underscore)
          service_params = declared_params(include_missing: false).merge(active: true)

          if service.update_attributes(service_params)
            present service, with: Entities::ProjectService
          else
            render_api_error!('400 Bad Request', 400)
          end
        end
      end

      desc "Delete a service for project"
      params do
        requires :service_slug, type: String, values: services.keys, desc: 'The name of the service'
      end
      delete ":id/services/:service_slug" do
        service = user_project.find_or_initialize_service(params[:service_slug].underscore)

        destroy_conditionally!(service) do
          attrs = service_attributes(service).inject({}) do |hash, key|
            hash.merge!(key => nil)
          end

          unless service.update_attributes(attrs.merge(active: false))
            render_api_error!('400 Bad Request', 400)
          end
        end
      end

      desc 'Get the service settings for project' do
        success Entities::ProjectService
      end
      params do
        requires :service_slug, type: String, values: services.keys, desc: 'The name of the service'
      end
      get ":id/services/:service_slug" do
        service = user_project.find_or_initialize_service(params[:service_slug].underscore)
        present service, with: Entities::ProjectService, include_passwords: current_user.admin?
      end
    end

    trigger_services.each do |service_slug, settings|
      helpers do
        def slash_command_service(project, service_slug, params)
          project.services.active.where(template: false).find do |service|
            service.try(:token) == params[:token] && service.to_param == service_slug.underscore
          end
        end
      end

      params do
        requires :id, type: String, desc: 'The ID of a project'
      end
      resource :projects, requirements: API::PROJECT_ENDPOINT_REQUIREMENTS  do
        desc "Trigger a slash command for #{service_slug}" do
          detail 'Added in GitLab 8.13'
        end
        params do
          settings.each do |setting|
            requires setting[:name], type: setting[:type], desc: setting[:desc]
          end
        end
        post ":id/services/#{service_slug.underscore}/trigger" do
          project = find_project(params[:id])

          # This is not accurate, but done to prevent leakage of the project names
          not_found!('Service') unless project

          service = slash_command_service(project, service_slug, params)
          result = service.try(:trigger, params)

          if result
            status result[:status] || 200
            present result
          else
            not_found!('Service')
          end
        end
      end
    end
  end
end
