# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
module CreateCampaignGift
	# @param [Hash] params
	# 		* campaign_gift_option_id
	#			* donation_id
	def self.create(params)
		ParamValidation.new(params, {
				:campaign_gift_option_id => {
						:required => true,
						:is_integer => true
				},
				:donation_id => {
						:required => true,
						:is_integer => true
				}
		})

		donation = Donation.includes(:nonprofit).includes(:supporter).includes(:recurring_donation).includes(:campaign_gifts).where('id = ?', params[:donation_id]).first
		unless donation
			raise ParamValidation::ValidationError.new("#{params[:donation_id]} is not a valid donation id.", {:key => :donation_id})
		end

		campaign_gift_option = CampaignGiftOption.includes(:campaign).where('id = ?', params[:campaign_gift_option_id]).first
		unless campaign_gift_option
			raise ParamValidation::ValidationError.new("#{params[:campaign_gift_option_id]} is not a valid campaign gift option", {:key => :campaign_gift_option_id})
		end

		#does donation already have a campaign_gift
		if (donation.campaign_gifts.any?)
			raise ParamValidation::ValidationError.new("#{params[:donation_id]} already has at least one associated campaign gift", :key => :donation_id)
		end

		if (donation.campaign != campaign_gift_option.campaign)
			raise ParamValidation::ValidationError.new("#{params[:campaign_gift_option_id]} is not for the same campaign as donation #{params[:donation_id]}", {:key => :campaign_gift_option_id})
		end

		if ((donation.recurring_donation != nil) && (campaign_gift_option.amount_recurring != nil && campaign_gift_option.amount_recurring > 0))
			# it's a recurring_donation. Is it enough? for the gift level?
			unless donation.recurring_donation.amount >= (campaign_gift_option.amount_recurring)
				AdminMailer.delay.notify_failed_gift(donation, campaign_gift_option)
				raise ParamValidation::ValidationError.new("#{params[:campaign_gift_option_id]} gift options requires a recurring donation of at least #{campaign_gift_option.amount_recurring} for donation #{donation.id}", {:key => :campaign_gift_option_id})
			end
		else
			unless donation.amount >= (campaign_gift_option.amount_one_time)
				AdminMailer.delay.notify_failed_gift(donation, campaign_gift_option)
				raise ParamValidation::ValidationError.new("#{params[:campaign_gift_option_id]} gift options requires a donation of at least #{campaign_gift_option.amount_one_time} for donation #{donation.id}", {:key => :campaign_gift_option_id})
			end
		end

		Qx.transaction do
			# are any gifts available?
			if campaign_gift_option.quantity.nil? || campaign_gift_option.quantity.zero?|| campaign_gift_option.total_gifts < campaign_gift_option.quantity
				gift = CampaignGift.new params
				gift.save!
				return gift
			end
		end
		AdminMailer.delay.notify_failed_gift(donation, campaign_gift_option)
		raise ParamValidation::ValidationError.new("#{params[:campaign_gift_option_id]} has no more inventory", {:key => :campaign_gift_option_id})

	end

	def self.validate_campaign_gift(cg)
		donation = cg.donation
		campaign_gift_option = cg.campaign_gift_option
		if ((donation.recurring_donation != nil) && (campaign_gift_option.amount_recurring != nil && campaign_gift_option.amount_recurring > 0))
			# it's a recurring_donation. Is it enough? for the gift level?
			unless donation.recurring_donation.amount >= (campaign_gift_option.amount_recurring)
				raise ParamValidation::ValidationError.new("#{campaign_gift_option.id} gift options requires a recurring donation of at least #{campaign_gift_option.amount_recurring}", {:key => :campaign_gift_option_id})
			end
		else
			unless donation.amount >= (campaign_gift_option.amount_one_time)
				raise ParamValidation::ValidationError.new("#{campaign_gift_option.id} gift options requires a donation of at least #{campaign_gift_option.amount_one_time}", {:key => :campaign_gift_option_id})
			end
		end
	end

end