package models

import (
	"cloud.o-forge.io/core/oc-catalog/models/rtype"
)

type Link struct {
	// ID        		primitive.ObjectID	`json:"ID" bson:"_id" required:"true" example:"5099803df3f4948bd2f98391"`
	Source 			string				`json:"source" description:"id in the workflow of the source object"`
	Destination 	string				`json:"destination" description:"id in the workflow of the destination object"`
	DCLink			bool				`json:"dcLink" description:"is this a link with a datacenter"`
}

// Use ResourceObject parameter to process certain components type differently
// and Id's to identify each component as a node in an oriented graph

// In the case of DCLink we choose to always consider the DC as the destination
// in order to facilitate some logic

func NewLink(src ResourceObject, srcId string, dst ResourceObject, dstId string) (link Link) {
	link.Source = srcId
	link.Destination = dstId

	// If the link is between a DC and a component make sure that the DC is destination
	// and if the component is computing, update the DataCenterID

	if (src.getRtype() == rtype.DATACENTER || dst.getRtype() == rtype.DATACENTER){
		var linked ResourceObject

		link.DCLink = true

		if src.getRtype() == rtype.DATACENTER {
			linked = dst
		} else {
			linked = src
		}
		
		if( link.DCLink && src.getRtype() == rtype.DATACENTER){
			link.Destination = srcId
			link.Source = dstId
		} 
		
		if (linked.getRtype() == rtype.COMPUTING){
			linked.(*ComputingObject).DataCenterID = link.Destination
		}
	}


	return
}

// So far only computing components expect the ID of the DC in their attributes
// func (l *Link) AddLinkToDataCenter(component models.ComputingModel) {
// 	}