package resources

import (
	"slices"

	"cloud.o-forge.io/core/oc-lib/config"
	"cloud.o-forge.io/core/oc-lib/models/common/pricing"
	"cloud.o-forge.io/core/oc-lib/models/peer"
	"cloud.o-forge.io/core/oc-lib/models/resources/resource_model"
	"cloud.o-forge.io/core/oc-lib/models/utils"
	"cloud.o-forge.io/core/oc-lib/tools"
	"github.com/biter777/countries"
	"github.com/marcinwyszynski/geopoint"
)

// AbstractResource is the struct containing all of the attributes commons to all ressources

// Resource is the interface to be implemented by all classes inheriting from Resource to have the same behavior

// http://www.inanzzz.com/index.php/post/wqbs/a-basic-usage-of-int-and-string-enum-types-in-golang
/*
* AbstractResource is a struct that represents a resource
* it defines the resource data
 */
type AbsResource struct {
	utils.AbstractObject                               // AbstractObject contains the basic fields of an object (id, name)
	Logo                 string                        `json:"logo,omitempty" bson:"logo,omitempty" validate:"required"`                           // Logo is the logo of the resource
	Description          string                        `json:"description,omitempty" bson:"description,omitempty"`                                 // Description is the description of the resource
	ShortDescription     string                        `json:"short_description,omitempty" bson:"short_description,omitempty" validate:"required"` // ShortDescription is the short description of the resource
	Owners               []utils.Owner                 `json:"owners,omitempty" bson:"owners,omitempty"`                                           // Owners is the list of owners of the resource
	ResourceModel        *resource_model.ResourceModel `json:"resource_model,omitempty" bson:"resource_model,omitempty"`                           // ResourceModel is the model of the resource
	UsageRestrictions    string                        `bson:"usage_restrictions,omitempty" json:"usage_restrictions,omitempty"`
}

func (r *AbsResource) StoreDraftDefault() {
	r.IsDraft = true
}
func (r *AbsResource) CanUpdate(set utils.DBObject) (bool, utils.DBObject) {
	if r.IsDraft != set.IsDrafted() && set.IsDrafted() {
		return true, set // only state can be updated
	}
	return r.IsDraft != set.IsDrafted() && set.IsDrafted(), set
}

func (r *AbsResource) CanDelete() bool {
	return r.IsDraft // only draft bookings can be deleted
}

func (ao *AbsResource) GetAccessor(request *tools.APIRequest) utils.Accessor {
	return nil
}

func (abs *AbsResource) SetResourceModel(model *resource_model.ResourceModel) {
	abs.ResourceModel = model
}

type AbstractResource[T ResourceInstanceITF] struct {
	AbsResource
	SelectedInstanceIndex int `json:"selected_instance_index,omitempty" bson:"selected_instance_index,omitempty"` // SelectedInstance is the selected instance
	Instances             []T `json:"instances,omitempty" bson:"instances,omitempty"`                             // Bill is the bill of the resource            // Bill is the bill of the resource
}

func (abs *AbstractResource[T]) ConvertToPricedResource(
	t tools.DataType, request *tools.APIRequest) pricing.PricedItemITF {
	instances := map[string]string{}
	profiles := map[string][]pricing.PricingProfileITF{}
	for _, instance := range abs.Instances {
		instances[instance.GetID()] = instance.GetName()
		profiles[instance.GetID()] = instance.GetPricingsProfiles(request.PeerID, request.Groups)
	}
	return &PricedResource{
		Name:            abs.Name,
		Logo:            abs.Logo,
		ResourceID:      abs.UUID,
		ResourceType:    t,
		InstancesRefs:   instances,
		PricingProfiles: profiles,
		CreatorID:       abs.CreatorID,
	}
}

func (abs *AbstractResource[T]) SetAllowedInstances(request *tools.APIRequest) {
	abs.Instances = verifyAuthAction[T](abs.Instances, request)
}

func (d *AbstractResource[T]) Trim() {
	if ok, _ := (&peer.Peer{AbstractObject: utils.AbstractObject{UUID: d.CreatorID}}).IsMySelf(); !ok {
		for _, instance := range d.Instances {
			instance.ClearPeerGroups()
		}
	}
}

func (abs *AbstractResource[T]) VerifyAuth(request *tools.APIRequest) bool {
	return len(verifyAuthAction[T](abs.Instances, request)) > 0 || abs.AbstractObject.VerifyAuth(request)
}

func verifyAuthAction[T ResourceInstanceITF](baseInstance []T, request *tools.APIRequest) []T {
	instances := []T{}
	for _, instance := range baseInstance {
		_, peerGroups := instance.GetPeerGroups()
		for _, peers := range peerGroups {
			if request == nil {
				continue
			}
			if grps, ok := peers[request.PeerID]; ok || config.GetConfig().Whitelist {
				if (ok && slices.Contains(grps, "*")) || (!ok && config.GetConfig().Whitelist) {
					instances = append(instances, instance)
				}
				for _, grp := range grps {
					if slices.Contains(request.Groups, grp) {
						instances = append(instances, instance)
					}
				}
			}
		}
	}
	return instances
}

type ResourceInstance[T ResourcePartnerITF] struct {
	UUID           string                `json:"id,omitempty" bson:"id,omitempty"`
	Name           string                `json:"name,omitempty" bson:"name,omitempty"`
	Location       geopoint.GeoPoint     `json:"location,omitempty" bson:"location,omitempty"`
	Country        countries.CountryCode `json:"country,omitempty" bson:"country,omitempty"`
	Source         string                `bson:"source,omitempty" json:"source,omitempty"` // Source is the source of the storage
	AccessProtocol string                `json:"access_protocol,omitempty" bson:"access_protocol,omitempty"`
	Partnerships   []T                   `json:"partner_resource,omitempty" bson:"partner_resource,omitempty"`
}

func (ri *ResourceInstance[T]) GetID() string {
	return ri.UUID
}

func (ri *ResourceInstance[T]) GetName() string {
	return ri.Name
}

func (ri *ResourceInstance[T]) GetPricingsProfiles(peerID string, groups []string) []pricing.PricingProfileITF {
	pricings := []pricing.PricingProfileITF{}
	for _, p := range ri.Partnerships {
		pricings = append(pricings, p.GetPricingsProfiles(peerID, groups)...)
	}
	return pricings
}

func (ri *ResourceInstance[T]) GetPeerGroups() ([]ResourcePartnerITF, []map[string][]string) {
	groups := []map[string][]string{}
	partners := []ResourcePartnerITF{}
	for _, p := range ri.Partnerships {
		partners = append(partners, p)
		groups = append(groups, p.GetPeerGroups())
	}
	return partners, groups
}

func (ri *ResourceInstance[T]) ClearPeerGroups() {
	for _, p := range ri.Partnerships {
		p.ClearPeerGroups()
	}
}

type ResourcePartnerShip[T pricing.PricingProfileITF] struct {
	Namespace       string              `json:"namespace" bson:"namespace" default:"default-namespace"`
	PeerGroups      map[string][]string `json:"peer_groups,omitempty" bson:"peer_groups,omitempty"`
	PricingProfiles map[string]T        `json:"pricing,omitempty" bson:"pricing,omitempty"`
}

func (ri *ResourcePartnerShip[T]) GetPricingsProfiles(peerID string, groups []string) []pricing.PricingProfileITF {
	if ri.PeerGroups[peerID] != nil {
		for _, p := range ri.PeerGroups[peerID] {
			if slices.Contains(groups, p) {
				profiles := []pricing.PricingProfileITF{}
				for _, ri := range ri.PricingProfiles {
					profiles = append(profiles, ri)
				}
				return profiles
			}
		}
	}
	return []pricing.PricingProfileITF{}
}

func (rp *ResourcePartnerShip[T]) GetPeerGroups() map[string][]string {
	return rp.PeerGroups
}

func (rp *ResourcePartnerShip[T]) ClearPeerGroups() {
	rp.PeerGroups = map[string][]string{}
}

/*
-> when a workflow should book a resource
-> it must be able to book a resource for a particular time
-> the resource should be available for the time
-> we must be able to parameter the resource for the time
-> before bookin'
*/