# frozen_string_literal: true

module Ci
  ##
  # This module implements methods that provide context in form of
  # essential CI/CD variables that can be used by a build / bridge job.
  #
  module Contextable
    ##
    # Variables in the environment name scope.
    #
    def scoped_variables(environment: expanded_environment_name, dependencies: true)
      Gitlab::Ci::Variables::Collection.new.tap do |variables|
        variables.concat(predefined_variables)
        variables.concat(project.predefined_variables)
        variables.concat(pipeline.predefined_variables)
        variables.concat(runner.predefined_variables) if runnable? && runner
        variables.concat(deployment_variables(environment: environment))
        variables.concat(yaml_variables)
        variables.concat(user_variables)
        variables.concat(dependency_variables) if dependencies
        variables.concat(secret_instance_variables)
        variables.concat(secret_group_variables)
        variables.concat(secret_project_variables(environment: environment))
        variables.concat(trigger_request.user_variables) if trigger_request
        variables.concat(pipeline.variables)
        variables.concat(pipeline.pipeline_schedule.job_variables) if pipeline.pipeline_schedule
      end
    end

    ##
    # Regular Ruby hash of scoped variables, without duplicates that are
    # possible to be present in an array of hashes returned from `variables`.
    #
    def scoped_variables_hash
      scoped_variables.to_hash
    end

    ##
    # Variables that do not depend on the environment name.
    #
    def simple_variables
      strong_memoize(:simple_variables) do
        scoped_variables(environment: nil).to_runner_variables
      end
    end

    def simple_variables_without_dependencies
      strong_memoize(:variables_without_dependencies) do
        scoped_variables(environment: nil, dependencies: false).to_runner_variables
      end
    end

    def user_variables
      Gitlab::Ci::Variables::Collection.new.tap do |variables|
        break variables if user.blank?

        variables.append(key: 'GITLAB_USER_ID', value: user.id.to_s)
        variables.append(key: 'GITLAB_USER_EMAIL', value: user.email)
        variables.append(key: 'GITLAB_USER_LOGIN', value: user.username)
        variables.append(key: 'GITLAB_USER_NAME', value: user.name)
      end
    end

    def predefined_variables
      Gitlab::Ci::Variables::Collection.new.tap do |variables|
        variables.append(key: 'CI_JOB_NAME', value: name)
        variables.append(key: 'CI_JOB_STAGE', value: stage)
        variables.append(key: 'CI_JOB_MANUAL', value: 'true') if action?
        variables.append(key: 'CI_PIPELINE_TRIGGERED', value: 'true') if trigger_request

        variables.append(key: 'CI_NODE_INDEX', value: self.options[:instance].to_s) if self.options&.include?(:instance)
        variables.append(key: 'CI_NODE_TOTAL', value: ci_node_total_value.to_s)

        # legacy variables
        variables.append(key: 'CI_BUILD_NAME', value: name)
        variables.append(key: 'CI_BUILD_STAGE', value: stage)
        variables.append(key: 'CI_BUILD_TRIGGERED', value: 'true') if trigger_request
        variables.append(key: 'CI_BUILD_MANUAL', value: 'true') if action?
      end
    end

    def deployment_variables(environment:)
      return [] unless environment

      project.deployment_variables(
        environment: environment,
        kubernetes_namespace: expanded_kubernetes_namespace
      )
    end

    def secret_instance_variables
      project.ci_instance_variables_for(ref: git_ref)
    end

    def secret_group_variables
      return [] unless project.group

      project.group.ci_variables_for(git_ref, project)
    end

    def secret_project_variables(environment: persisted_environment)
      project.ci_variables_for(ref: git_ref, environment: environment)
    end

    private

    def ci_node_total_value
      parallel = self.options&.dig(:parallel)
      parallel = parallel.dig(:total) if parallel.is_a?(Hash)
      parallel || 1
    end
  end
end