package resources

import (
	"errors"
	"slices"

	"cloud.o-forge.io/core/oc-lib/config"
	"cloud.o-forge.io/core/oc-lib/models/booking"
	"cloud.o-forge.io/core/oc-lib/models/common/models"
	"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/utils"
	"cloud.o-forge.io/core/oc-lib/tools"
	"github.com/biter777/countries"
	"github.com/google/uuid"
)

// AbstractResource is the struct containing all of the attributes commons to all ressources
type AbstractResource struct {
	utils.AbstractObject                                                   // AbstractObject contains the basic fields of an object (id, name)
	Type                 string                                            `json:"type,omitempty" bson:"type,omitempty"`                                               // Type is the type of the resource
	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
	UsageRestrictions    string                                            `bson:"usage_restrictions,omitempty" json:"usage_restrictions,omitempty"`
	AllowedBookingModes  map[booking.BookingMode]*pricing.PricingVariation `bson:"allowed_booking_modes" json:"allowed_booking_modes"`
}

func (r *AbstractResource) GetBookingModes() map[booking.BookingMode]*pricing.PricingVariation {
	if len(r.AllowedBookingModes) == 0 {
		return map[booking.BookingMode]*pricing.PricingVariation{
			booking.PLANNED: {
				Percentage: 0,
			}, booking.WHEN_POSSIBLE: {
				Percentage: 0,
			},
		}
	}
	return r.AllowedBookingModes
}

func (r *AbstractResource) GetSelectedInstance(selected *int) ResourceInstanceITF {
	return nil
}

func (r *AbstractResource) GetType() string {
	return tools.INVALID.String()
}

func (r *AbstractResource) StoreDraftDefault() {
	r.IsDraft = true
}

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

type AbstractInstanciatedResource[T ResourceInstanceITF] struct {
	AbstractResource     // AbstractResource contains the basic fields of an object (id, name)
	Instances        []T `json:"instances,omitempty" bson:"instances,omitempty"` // Bill is the bill of the resource            // Bill is the bill of the resource
}

func (abs *AbstractInstanciatedResource[T]) AddInstances(instance ResourceInstanceITF) {
	abs.Instances = append(abs.Instances, instance.(T))
}

func (abs *AbstractInstanciatedResource[T]) ConvertToPricedResource(t tools.DataType, selectedInstance *int, selectedPartnership *int, selectedBuyingStrategy *int, selectedStrategy *int, selectedBookingModeIndex *int, request *tools.APIRequest) (pricing.PricedItemITF, error) {
	instances := map[string]string{}
	profiles := []pricing.PricingProfileITF{}
	for _, instance := range abs.Instances { // TODO why it crush before ?
		instances[instance.GetID()] = instance.GetName()
		profiles = instance.GetPricingsProfiles(request.PeerID, request.Groups)
	}
	var profile pricing.PricingProfileITF
	if t := abs.GetSelectedInstance(selectedInstance); t != nil {
		profile = t.GetProfile(request.PeerID, selectedPartnership, selectedBuyingStrategy, selectedStrategy)
	}
	if profile == nil {
		if len(profiles) > 0 {
			profile = profiles[0]
		} else {
			if ok, _ := peer.IsMySelf(request.PeerID); ok {
				profile = pricing.GetDefaultPricingProfile()
			} else {
				return nil, errors.New("no pricing profile found")
			}
		}
	}
	variations := []*pricing.PricingVariation{}
	if selectedBookingModeIndex != nil && abs.AllowedBookingModes[booking.BookingMode(*selectedBookingModeIndex)] != nil {
		variations = append(variations, abs.AllowedBookingModes[booking.BookingMode(*selectedBookingModeIndex)])
	}
	return &PricedResource{
		Name:            abs.Name,
		Logo:            abs.Logo,
		ResourceID:      abs.UUID,
		ResourceType:    t,
		Quantity:        1,
		InstancesRefs:   instances,
		SelectedPricing: profile,
		Variations:      variations,
		CreatorID:       abs.CreatorID,
	}, nil
}

func (abs *AbstractInstanciatedResource[T]) ClearEnv() utils.DBObject {
	for _, instance := range abs.Instances {
		instance.ClearEnv()
	}
	return abs
}

func (r *AbstractInstanciatedResource[T]) GetSelectedInstance(selected *int) ResourceInstanceITF {
	if selected != nil && len(r.Instances) > *selected {
		return r.Instances[*selected]
	}
	if len(r.Instances) > 0 {
		return r.Instances[0]
	}
	return nil
}

func (abs *AbstractInstanciatedResource[T]) SetAllowedInstances(request *tools.APIRequest) {
	if request != nil && request.PeerID == abs.CreatorID && request.PeerID != "" {
		return
	}
	abs.Instances = VerifyAuthAction[T](abs.Instances, request)
}

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

func (abs *AbstractInstanciatedResource[T]) VerifyAuth(callName string, request *tools.APIRequest) bool {
	return len(VerifyAuthAction[T](abs.Instances, request)) > 0 || abs.AbstractObject.VerifyAuth(callName, 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)
					continue
				}
				for _, grp := range grps {
					if slices.Contains(request.Groups, grp) {
						instances = append(instances, instance)
					}
				}
			}
		}
	}
	return instances
}

type GeoPoint struct {
	Latitude  float64 `json:"latitude,omitempty" bson:"latitude,omitempty"`
	Longitude float64 `json:"longitude,omitempty" bson:"longitude,omitempty"`
}

type ResourceInstance[T ResourcePartnerITF] struct {
	utils.AbstractObject
	Location       GeoPoint              `json:"location,omitempty" bson:"location,omitempty"`
	Country        countries.CountryCode `json:"country,omitempty" bson:"country,omitempty"`
	AccessProtocol string                `json:"access_protocol,omitempty" bson:"access_protocol,omitempty"`
	Env            []models.Param        `json:"env,omitempty" bson:"env,omitempty"`
	Inputs         []models.Param        `json:"inputs,omitempty" bson:"inputs,omitempty"`
	Outputs        []models.Param        `json:"outputs,omitempty" bson:"outputs,omitempty"`

	//	SelectedPartnershipIndex int `json:"selected_partnership_index,omitempty" bson:"selected_partnership_index,omitempty"`
	//	SelectedBuyingStrategy   int `json:"selected_buying_strategy,omitempty" bson:"selected_buying_strategy,omitempty"`
	//	SelectedStrategy         int `json:"selected_strategy,omitempty" bson:"selected_strategy,omitempty"`

	Partnerships []T `json:"partnerships,omitempty" bson:"partnerships,omitempty"`
}

// TODO should kicks all selection

func NewInstance[T ResourcePartnerITF](name string) *ResourceInstance[T] {
	return &ResourceInstance[T]{
		AbstractObject: utils.AbstractObject{
			UUID: uuid.New().String(),
			Name: name,
		},
		Partnerships: []T{},
	}
}

func (ri *ResourceInstance[T]) ClearEnv() {
	ri.Env = []models.Param{}
	ri.Inputs = []models.Param{}
	ri.Outputs = []models.Param{}
}

func (ri *ResourceInstance[T]) GetProfile(peerID string, partnershipIndex *int, buyingIndex *int, strategyIndex *int) pricing.PricingProfileITF {
	if partnershipIndex != nil && len(ri.Partnerships) > *partnershipIndex {
		prts := ri.Partnerships[*partnershipIndex]
		return prts.GetProfile(buyingIndex, strategyIndex)
	}
	if ok, _ := peer.IsMySelf(peerID); ok {
		return pricing.GetDefaultPricingProfile()
	}
	return nil
}

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)...)
	}
	if len(pricings) == 0 {
		if ok, _ := peer.IsMySelf(peerID); ok {
			pricings = append(pricings, pricing.GetDefaultPricingProfile())
		}
	}
	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())
	}
	if len(groups) == 0 {
		_, id := peer.GetSelf()
		groups = []map[string][]string{
			{
				id: {"*"},
			},
		}
		// TODO make allow all only for self.
	}
	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[int]map[int]T   `json:"pricing_profiles,omitempty" bson:"pricing_profiles,omitempty"`
	// to upgrade pricing profiles. to be a map BuyingStrategy, map of Strategy
}

func (ri *ResourcePartnerShip[T]) GetProfile(buying *int, strategy *int) pricing.PricingProfileITF {
	if buying != nil && strategy != nil {
		if strat, ok := ri.PricingProfiles[*buying]; ok {
			if profile, ok := strat[*strategy]; ok {
				return profile
			}
		}
	}

	return nil
}

/*
Le pricing doit être selectionné lors d'un scheduling...
le type de paiement défini le type de stratégie de paiement
note : il faut rajouté - une notion de facturation
Une order est l'ensemble de la commande... un booking une réservation, une purchase un acte d'achat.
Une bill (facture) représente alors... l'emission d'une facture à un instant T en but d'être honorée, envoyée ... etc.
*/
func (ri *ResourcePartnerShip[T]) GetPricingsProfiles(peerID string, groups []string) []pricing.PricingProfileITF {
	profiles := []pricing.PricingProfileITF{}
	if ri.PeerGroups[peerID] == nil {
		return profiles
	}
	for _, p := range ri.PeerGroups[peerID] {
		if slices.Contains(groups, p) || slices.Contains(groups, "*") {
			for _, ri := range ri.PricingProfiles {
				for _, i := range ri {
					profiles = append(profiles, i)
				}
			}
			return profiles
		}
	}
	if len(profiles) == 0 {
		if ok, _ := peer.IsMySelf(peerID); ok {
			profiles = append(profiles, pricing.GetDefaultPricingProfile())
		}
	}
	return profiles
}

func (rp *ResourcePartnerShip[T]) GetPeerGroups() map[string][]string {
	if len(rp.PeerGroups) == 0 {
		_, id := peer.GetSelf()
		return map[string][]string{
			id: {"*"},
		}
	}
	return rp.PeerGroups
}

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