# frozen_string_literal: true

class MyModuleMember
  include ActiveModel::Model

  attr_accessor :user_id, :user_role_id
  attr_reader :current_user, :my_module,
              :experiment, :user, :project,
              :user_role, :user_assignment

  def initialize(current_user, my_module, experiment, project, user = nil)
    @experiment = experiment
    @current_user = current_user
    @project = project
    @my_module = my_module

    if user
      @user = user
      @user_role = UserAssignment.find_by(assignable: my_module, user: user)&.user_role
    end
  end

  def update(params)
    self.user_role_id = params[:user_role_id]
    self.user_id = params[:user_id]

    ActiveRecord::Base.transaction do
      @user = @project.users.find(user_id)
      @user_role = UserRole.find_by(id: user_role_id)
      @user_assignment = UserAssignment.find_by(assignable: my_module, user: user)

      if destroy_role?
        user_assignment.destroy
      elsif user_assignment.present?
        user_assignment.update!(user_role: user_role)
      else
        UserAssignment.create!(
          assignable: my_module,
          user: user,
          user_role: user_role,
          assigned_by: current_user
        )
      end
      log_change_activity
    end
  end

  private

  def log_change_activity
    Activities::CreateActivityService.call(
      activity_type: :change_user_role_on_my_module,
      owner: current_user,
      subject: my_module,
      team: project.team,
      project: project,
      message_items: {
        my_module: my_module.id,
        user_target: user.id,
        role: user_role.name
      }
    )
  end

  def destroy_role?
    experiment_role = UserAssignment.find_by(assignable: experiment, user: user)&.user_role
    (user_assignment.present? && user_role.nil?) ||
      (experiment_role == user_role) ||
      (experiment_role.nil? && UserAssignment.find_by(assignable: project, user: user)&.user_role == user_role)
  end
end