// Copyright 2018 NetApp, Inc. All Rights Reserved.

package storageattribute

import (
	"fmt"
	"strings"
)

func NewStringOffer(offers ...string) Offer {
	return &stringOffer{
		Offers: offers,
	}
}

func NewStringOfferFromOffers(offers ...Offer) Offer {

	// Use a map as a set to deduplicate the string offers
	offerMap := make(map[string]struct{})

	// For each offer that is a stringOffer, place its contents in the map
	for _, offer := range offers {
		if sOffer, ok := offer.(*stringOffer); ok {
			for _, s := range sOffer.Offers {
				offerMap[s] = struct{}{}
			}
		}
	}

	offerKeys := make([]string, 0)
	for key := range offerMap {
		offerKeys = append(offerKeys, key)
	}

	return &stringOffer{
		Offers: offerKeys,
	}
}

func (o *stringOffer) Matches(r Request) bool {
	sr, ok := r.(*stringRequest)
	if !ok {
		return false
	}
	for _, s := range o.Offers {
		if s == sr.Request {
			return true
		}
	}
	return false
}

func (o *stringOffer) String() string {
	return fmt.Sprintf("{Offers: %s}", strings.Join(o.Offers, ","))
}

func (o *stringOffer) ToString() string {
	return strings.Join(o.Offers, ",")
}

func NewStringRequest(request string) Request {
	return &stringRequest{
		Request: request,
	}
}

func (r *stringRequest) Value() interface{} {
	return r.Request
}

func (r *stringRequest) GetType() Type {
	return stringType
}

func (r *stringRequest) String() string {
	return r.Request
}