# frozen_string_literal: true

module API
  # Environments RESTfull API endpoints
  class Environments < Grape::API
    include ::API::Helpers::CustomValidators
    include PaginationParams

    before { authenticate! }

    params do
      requires :id, type: String, desc: "The project ID"
    end
    resource :projects, requirements: API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
      desc "Get all environments of the project" do
        detail "This feature was introduced in GitLab 8.11."
        success Entities::Environment
      end
      params do
        use :pagination
      end
      get ":id/environments" do
        authorize! :read_environment, user_project

        present paginate(user_project.environments), with: Entities::Environment
      end

      desc "Creates a new environment" do
        detail "This feature was introduced in GitLab 8.11."
        success Entities::Environment
      end
      params do
        requires :name,           type: String,   desc: "The name of the environment to be created"
        optional :external_url,   type: String,   desc: "URL on which this deployment is viewable"
        optional :slug, absence: {message: "is automatically generated and cannot be changed"}
      end
      post ":id/environments" do
        authorize! :create_environment, user_project

        environment = user_project.environments.create(declared_params)

        if environment.persisted?
          present environment, with: Entities::Environment
        else
          render_validation_error!(environment)
        end
      end

      desc "Updates an existing environment" do
        detail "This feature was introduced in GitLab 8.11."
        success Entities::Environment
      end
      params do
        requires :environment_id, type: Integer,  desc: "The environment ID"
        optional :name,           type: String,   desc: "The new environment name"
        optional :external_url,   type: String,   desc: "The new URL on which this deployment is viewable"
        optional :slug, absence: {message: "is automatically generated and cannot be changed"}
      end
      put ":id/environments/:environment_id" do
        authorize! :update_environment, user_project

        environment = user_project.environments.find(params[:environment_id])

        update_params = declared_params(include_missing: false).extract!(:name, :external_url)
        if environment.update(update_params)
          present environment, with: Entities::Environment
        else
          render_validation_error!(environment)
        end
      end

      desc "Deletes an existing environment" do
        detail "This feature was introduced in GitLab 8.11."
        success Entities::Environment
      end
      params do
        requires :environment_id, type: Integer, desc: "The environment ID"
      end
      delete ":id/environments/:environment_id" do
        authorize! :update_environment, user_project

        environment = user_project.environments.find(params[:environment_id])

        destroy_conditionally!(environment)
      end

      desc "Stops an existing environment" do
        success Entities::Environment
      end
      params do
        requires :environment_id, type: Integer, desc: "The environment ID"
      end
      post ":id/environments/:environment_id/stop" do
        authorize! :read_environment, user_project

        environment = user_project.environments.find(params[:environment_id])
        authorize! :stop_environment, environment

        environment.stop_with_action!(current_user)

        status 200
        present environment, with: Entities::Environment
      end
    end
  end
end