class GroupsController < Groups::ApplicationController

  include IssuesAction
  include MergeRequestsAction

  include ParamsBackwardCompatibility

  respond_to :html

  before_action :authenticate_user!, only: [:new, :create]

  before_action :group, except: [:index, :new, :create]

  # Authorize

  before_action :authorize_admin_group!, only: [:edit, :update, :destroy, :projects]
  before_action :authorize_create_group!, only: [:new, :create]

  before_action :group_projects, only: [:projects, :activity, :issues, :merge_requests]

  before_action :group_merge_requests, only: [:merge_requests]

  before_action :event_filter, only: [:activity]

  before_action :user_actions, only: [:show, :subgroups]

  layout :determine_layout

  def index

    redirect_to(current_user ? dashboard_groups_path : explore_groups_path)

  end

  def new
    @group = Group.new
  end

  def create

    @group = Groups::CreateService.new(current_user, group_params).execute

    if @group.persisted?

      notice = if @group.chat_team.present?
                 "Group '#{@group.name}' and its Mattermost team were successfully created."
               else

                 "Group '#{@group.name}' was successfully created."

               end

      redirect_to @group, notice: notice

    else
      render action: "new"
    end
  end

  def show

    setup_projects

    respond_to do |format|
      format.html

      format.json do

        render json: {
          html: view_to_html_string("dashboard/projects/_projects", locals: { projects: @projects })
        }

      end

      format.atom do
        load_events
        render layout: false
      end

    end
  end

  def subgroups

    @nested_groups = GroupsFinder.new(current_user, parent: group).execute

    @nested_groups = @nested_groups.search(params[:filter_groups]) if params[:filter_groups].present?
  end

  def activity

    respond_to do |format|

      format.html

      format.json do
        load_events
        pager_json("events/_events", @events.count)
      end
    end
  end

  def edit
  end

  def projects

    @projects = @group.projects.with_statistics.page(params[:page])

  end

  def update

    if Groups::UpdateService.new(@group, current_user, group_params).execute

      redirect_to edit_group_path(@group), notice: "Group '#{@group.name}' was successfully updated."

    else

      @group.restore_path!

      render action: "edit"

    end
  end

  def destroy

    Groups::DestroyService.new(@group, current_user).async_execute

    redirect_to root_path, alert: "Group '#{@group.name}' was scheduled for deletion."

  end

  protected

  def setup_projects

    set_non_archived_param
    params[:sort] ||= 'latest_activity_desc'
    @sort = params[:sort]

    options = {}
    options[:only_owned] = true if params[:shared] == '0'
    options[:only_shared] = true if params[:shared] == '1'

    @projects = GroupProjectsFinder.new(params: params, group: group, options: options, current_user: current_user).execute

    @projects = @projects.includes(:namespace)

    @projects = @projects.page(params[:page]) if params[:name].blank?

  end

  def authorize_create_group!

    unless can?(current_user, :create_group)

      return render_404
    end
  end

  def determine_layout

    if [:new, :create].include?(action_name.to_sym)

      'application'

    elsif [:edit, :update, :projects].include?(action_name.to_sym)
      'group_settings'

    else

      'group'

    end
  end

  def group_params

    params.require(:group).permit(group_params_ce)
  end

  def group_params_ce
    [

      :avatar,

      :description,

      :lfs_enabled,
      :name,

      :path,
      :public,
      :request_access_enabled,

      :share_with_group_lock,

      :visibility_level,

      :parent_id,

      :create_chat_team,

      :chat_team_name,
      :require_two_factor_authentication,
      :two_factor_grace_period

    ]

  end

  def load_events

    @events = Event.in_projects(@projects)

    @events = event_filter.apply_filter(@events).with_associations
    @events = @events.limit(20).offset(params[:offset] || 0)
  end

  def user_actions
    if current_user
      @last_push = current_user.recent_push
      @notification_setting = current_user.notification_settings_for(group)
    end
  end

end