class Projects::ApplyJoinService < ApplicationService
  Error = Class.new(StandardError)

  attr_reader :user, :params

  def initialize(user, params)
    @user   = user
    @params = params
  end

  def call
    validate!

    # 项目报告人员直接加入项目
    if params[:role] == 'reporter'
      Projects::JoinService.call(project, user, role: 'reporter')
      return project
    end

    ActiveRecord::Base.transaction do
      apply = user.applied_projects.create!(project: project, role: role_value)

      apply.forge_activities.find_or_create_by!(user: user, project: project)

      notify_project_manager!
    end

    # notify_project_owner
    ApplyJoinProjectNotifyJob.perform_later(user.id, project.id, role_value)

    project
  end

  private

  def project
    @_project ||= Project.find_by(invite_code: params[:code].to_s.strip)
  end

  def role_value
    @_role ||=
      case params[:role]
      when 'manager'   then 3
      when 'developer' then 4
      when 'reporter'  then 5
      else raise Error, '角色无效'
      end
  end

  def notify_project_manager!
    columns = %i[user_id applied_id applied_type status viewed applied_user_id role project_id created_at updated_at]
    AppliedMessage.bulk_insert(*columns) do |worker|
      base_attr = { status: false, viewed: false, applied_user_id: user.id, role: role_value, project_id: project.id }

      project.manager_members.each do |manager|
        worker.add(base_attr.merge(user_id: manager.user_id))
      end
    end
  end

  def notify_project_owner
    owner = project.user
    return if owner.phone.blank?

    Educoder::Sms.send(mobile: owner.phone, send_type:'applied_project_info',
                       user_name: owner.show_name, name: project.name)
  rescue Exception => ex
    Rails.logger.error("发送短信失败 => #{ex.message}")
  end

  def validate!
    # params check
    raise Error, '邀请码不能为空' if params[:code].blank?
    raise Error, '角色不能为空' if params[:role].blank?
    raise Error, '角色无效' unless %w(manager developer reporter).include?(params[:role])

    # logical check
    raise Error, '邀请码无效' if project.blank?
    raise Error, '您已在该项目中' if project.member?(user)
    raise Error, '您已经提交过申请' if user.applied_projects.pending.exists?(project: project)
  end
end