#  Licensed under the Apache License, Version 2.0 (the "License"); you may
#  not use this file except in compliance with the License. You may obtain
#  a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#  License for the specific language governing permissions and limitations
#  under the License.

Namespaces:
  =: io.murano.apps.docker
  std: io.murano

Name: DockerApplication

Extends: std:Application

Properties:
  host:
    Contract: $.class(DockerContainerHost).notNull()

  applicationEndpoints:
    Contract:
      - port: $.int().notNull().check($ > 0)
        address: $.string().notNull()
        scope: $.string().notNull().check($ in list(public, cloud, internal, host))
        portScope: $.string().notNull().check($ in list(public, cloud, internal, host))
        containerPort: $.int().notNull().check($ > 0)
        protocol: $.string().notNull().check($ in list(TCP, UDP))
    Usage: Out

Methods:
  initialize:
    Body:
      - $._environment: $.find(std:Environment).require()


  deploy:
    Body:
      - $.host.deploy()
      - $container: $.getContainer()
      - $repr: $._getContainerRepresentation($container)
      - If: $.getAttr(container, null) != $repr
        Then:
        - $.onInstallationStart()
        - Try:
          - $.applicationEndpoints: $.host.hostContainer($container)
          - $.setAttr(container, $repr)
          Catch:
          - As: e
            Do:
            - $formatString: 'Error: {0}'
            - $._environment.reporter.report_error($, $formatString.format($e.message))
            - Rethrow:
          Else:
          - $.onInstallationFinish()


  destroy:
    Body:
      - If: $.getAttr(container, null) != null
        Then:
          - $container: $.getContainer()
          - $.host.deleteContainer($container.name)
          - $.setAttr(container, null)


  getConnectionTo:
    Arguments:
      - application:
          Contract: $.class(DockerApplication).notNull()
      - port:
          Contract: $.int().notNull().check($ > 0)
      - protocol:
          Contract: $.string().notNull().check($ in list(TCP, UDP))
          Default: TCP
    Body:
      - $scopes: [cloud, public]
      - If: $.host = $application.host
        Then:
          - $scopes: list(host, internal) + $scopes
        Else:
          - If: $.host.getInternalScopeId() = $application.host.getInternalScopeId()
            Then:
              - $scopes: list(internal) + $scopes
      - For: s
        In: $scopes
        Do:
          - $endpoints: $application.applicationEndpoints.where(true).where(
              $.scope = $s and $.containerPort = $port and $.protocol = $protocol)
          - If: len($endpoints) > 0
            Then:
              - $index: int(len($endpoints) * random())
              - $endpoint: $endpoints[$index]
              - Return:
                  host: $endpoint.address
                  port: $endpoint.port


  _getContainerRepresentation:
    Arguments:
      - container:
          Contract: $.class(DockerContainer).notNull()
    Body:
      Return: $container.getRepresentation()


  getContainer:


  onInstallationStart:
    Body:


  onInstallationFinish:
    Body: