require_dependency 'user_destroyer'
require_dependency 'admin_user_index_query'
require_dependency 'boost_trust_level'

class Admin::UsersController < Admin::AdminController

  before_filter :fetch_user, only: [:ban,
                                    :unban,
                                    :refresh_browsers,
                                    :revoke_admin,
                                    :grant_admin,
                                    :revoke_moderation,
                                    :grant_moderation,
                                    :approve,
                                    :activate,
                                    :deactivate,
                                    :block,
                                    :unblock,
                                    :trust_level,
                                    :generate_api_key,
                                    :revoke_api_key]

  def index
    query = ::AdminUserIndexQuery.new(params)
    render_serialized(query.find_users, AdminUserSerializer)
  end

  def show
    @user = User.where(username_lower: params[:id]).first
    raise Discourse::NotFound.new unless @user
    render_serialized(@user, AdminDetailedUserSerializer, root: false)
  end

  def delete_all_posts
    @user = User.where(id: params[:user_id]).first
    @user.delete_all_posts!(guardian)
    render nothing: true
  end

  def ban
    guardian.ensure_can_ban!(@user)
    @user.banned_till = params[:duration].to_i.days.from_now
    @user.banned_at = DateTime.now
    @user.save!
    # TODO logging
    render nothing: true
  end

  def unban
    guardian.ensure_can_ban!(@user)
    @user.banned_till = nil
    @user.banned_at = nil
    @user.save!
    # TODO logging
    render nothing: true
  end

  def refresh_browsers
    MessageBus.publish "/file-change", ["refresh"], user_ids: [@user.id]
    render nothing: true
  end

  def revoke_admin
    guardian.ensure_can_revoke_admin!(@user)
    @user.revoke_admin!
    render nothing: true
  end

  def generate_api_key
    api_key = @user.generate_api_key(current_user)
    render_serialized(api_key, ApiKeySerializer)
  end

  def revoke_api_key
    @user.revoke_api_key
    render nothing: true
  end

  def grant_admin
    guardian.ensure_can_grant_admin!(@user)
    @user.grant_admin!
    render_serialized(@user, AdminUserSerializer)
  end

  def revoke_moderation
    guardian.ensure_can_revoke_moderation!(@user)
    @user.revoke_moderation!
    render nothing: true
  end

  def grant_moderation
    guardian.ensure_can_grant_moderation!(@user)
    @user.grant_moderation!
    render_serialized(@user, AdminUserSerializer)
  end

  def trust_level
    guardian.ensure_can_change_trust_level!(@user)
    logger = StaffActionLogger.new(current_user)
    BoostTrustLevel.new(user: @user, level: params[:level], logger: logger).save!
    render_serialized(@user, AdminUserSerializer)
  end

  def approve
    guardian.ensure_can_approve!(@user)
    @user.approve(current_user)
    render nothing: true
  end

  def approve_bulk
    User.where(id: params[:users]).each do |u|
      u.approve(current_user) if guardian.can_approve?(u)
    end
    render nothing: true
  end

  def activate
    guardian.ensure_can_activate!(@user)
    @user.activate
    render nothing: true
  end

  def deactivate
    guardian.ensure_can_deactivate!(@user)
    @user.deactivate
    render nothing: true
  end

  def block
    guardian.ensure_can_block_user! @user
    UserBlocker.block(@user, current_user)
    render nothing: true
  end

  def unblock
    guardian.ensure_can_unblock_user! @user
    UserBlocker.unblock(@user, current_user)
    render nothing: true
  end

  def reject_bulk
    d = UserDestroyer.new(current_user)
    success_count = 0
    User.where(id: params[:users]).each do |u|
      success_count += 1 if guardian.can_delete_user?(u) and d.destroy(u, params.slice(:context)) rescue UserDestroyer::PostsExistError
    end
    render json: {success: success_count, failed: (params[:users].try(:size) || 0) - success_count}
  end

  def destroy
    user = User.where(id: params[:id]).first
    guardian.ensure_can_delete_user!(user)
    begin
      if UserDestroyer.new(current_user).destroy(user, params.slice(:delete_posts, :block_email, :block_urls, :block_ip, :context))
        render json: {deleted: true}
      else
        render json: {deleted: false, user: AdminDetailedUserSerializer.new(user, root: false).as_json}
      end
    rescue UserDestroyer::PostsExistError
      raise Discourse::InvalidAccess.new("User #{user.username} has #{user.post_count} posts, so can't be deleted.")
    end
  end


  private

    def fetch_user
      @user = User.where(id: params[:user_id]).first
    end

end