add sets up

models/bill/bill.go

@@ -26,7 +26,20 @@ type Bill struct {
 	Total     float64               `json:"total" bson:"total" validate:"required"`
 }
 
-func DraftBill(order *order.Order, request *tools.APIRequest) (*Bill, error) {
+func GenerateBill(order *order.Order, request *tools.APIRequest) (*Bill, error) {
+	// hhmmm : should get... the loop.
+	return &Bill{
+		AbstractObject: utils.AbstractObject{
+			Name:    "bill_" + request.PeerID + "_" + time.Now().UTC().Format("2006-01-02T15:04:05"),
+			IsDraft: false,
+		},
+		OrderID: order.UUID,
+		Status:  enum.PENDING,
+		// SubOrders: peerOrders,
+	}, nil
+}
+
+func DraftFirstBill(order *order.Order, request *tools.APIRequest) (*Bill, error) {
 	peers := map[string][]*PeerItemOrder{}
 	for _, p := range order.Purchases {
 		// TODO : if once

models/billing_process.md

@@ -0,0 +1,2 @@
+# Billing process 
+Scheduler process a drafted order + a first bill corresponding to every once buying. 

models/common/pricing/interfaces.go

@@ -12,6 +12,7 @@ type PricedItemITF interface {
 	IsPurchasable() bool
 	IsBooked() bool
 	GetCreatorID() string
+	SelectPricing() PricingProfileITF
 	GetLocationStart() *time.Time
 	SetLocationStart(start time.Time)
 	SetLocationEnd(end time.Time)

models/common/pricing/pricing_profile.go

@@ -5,10 +5,11 @@ import (
 )
 
 type PricingProfileITF interface {
-	GetPrice(quantity float64, val float64, start time.Time, end time.Time, params ...string) (float64, error)
-	IsPurchasable() bool
 	IsBooked() bool
+	IsPurchasable() bool
+	GetPurchase() BuyingStrategy
 	GetOverrideStrategyValue() int
+	GetPrice(quantity float64, val float64, start time.Time, end time.Time, params ...string) (float64, error)
 }
 
 type RefundType int

models/order/order.go

@@ -5,6 +5,7 @@ import (
 
 	"cloud.o-forge.io/core/oc-lib/models/booking"
 	"cloud.o-forge.io/core/oc-lib/models/common/enum"
+	"cloud.o-forge.io/core/oc-lib/models/common/pricing"
 	"cloud.o-forge.io/core/oc-lib/models/resources/purchase_resource"
 	"cloud.o-forge.io/core/oc-lib/models/utils"
 	"cloud.o-forge.io/core/oc-lib/tools"
@@ -17,9 +18,11 @@ import (
 type Order struct {
 	utils.AbstractObject
 	ExecutionsID string                                `json:"executions_id" bson:"executions_id" validate:"required"`
+	Status       enum.CompletionStatus                 `json:"status" bson:"status" default:"0"`
 	Purchases    []*purchase_resource.PurchaseResource `json:"purchases" bson:"purchases"`
 	Bookings     []*booking.Booking                    `json:"bookings" bson:"bookings"`
-	Status       enum.CompletionStatus                 `json:"status" bson:"status" default:"0"`
+
+	Billing map[pricing.BillingStrategy][]*booking.Booking `json:"billing" bson:"billing"`
 }
 
 func (r *Order) StoreDraftDefault() {

models/resources/compute.go

@@ -30,12 +30,11 @@ func (r *ComputeResource) GetType() string {
 	return tools.COMPUTE_RESOURCE.String()
 }
 
-func (abs *ComputeResource) ConvertToPricedResource(
+func (abs *ComputeResource) ConvertToPricedResource(t tools.DataType, request *tools.APIRequest) pricing.PricedItemITF {
-	t tools.DataType, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) pricing.PricedItemITF {
 	if t != tools.COMPUTE_RESOURCE {
 		return nil
 	}
-	p := abs.AbstractInstanciatedResource.ConvertToPricedResource(t, request, buyingStrategy, pricingStrategy)
+	p := abs.AbstractInstanciatedResource.ConvertToPricedResource(t, request)
 	priced := p.(*PricedResource)
 	return &PricedComputeResource{
 		PricedResource: *priced,
@@ -84,6 +83,10 @@ func (p *ComputeResourcePricingProfile) IsPurchasable() bool {
 	return p.Pricing.BuyingStrategy != pricing.UNDEFINED_SUBSCRIPTION
 }
 
+func (p *ComputeResourcePricingProfile) GetPurchase() pricing.BuyingStrategy {
+	return p.Pricing.BuyingStrategy
+}
+
 func (p *ComputeResourcePricingProfile) IsBooked() bool {
 	if p.Pricing.BuyingStrategy == pricing.PERMANENT {
 		p.Pricing.BuyingStrategy = pricing.SUBSCRIPTION
@@ -159,11 +162,8 @@ func (r *PricedComputeResource) GetPrice() (float64, error) {
 		r.UsageEnd = &add
 	}
 	if r.SelectedPricing == nil {
-		if len(r.PricingProfiles) == 0 {
 		return 0, errors.New("pricing profile must be set on Priced Compute" + r.ResourceID)
 	}
-		r.SelectedPricing = r.PricingProfiles[0]
-	}
 	pricing := r.SelectedPricing
 	price := float64(0)
 	for _, l := range []map[string]float64{r.CPUsLocated, r.GPUsLocated} {

models/resources/data.go

@@ -37,12 +37,11 @@ func (r *DataResource) GetType() string {
 	return tools.DATA_RESOURCE.String()
 }
 
-func (abs *DataResource) ConvertToPricedResource(
+func (abs *DataResource) ConvertToPricedResource(t tools.DataType, request *tools.APIRequest) pricing.PricedItemITF {
-	t tools.DataType, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) pricing.PricedItemITF {
 	if t != tools.DATA_RESOURCE {
 		return nil
 	}
-	p := abs.AbstractInstanciatedResource.ConvertToPricedResource(t, request, buyingStrategy, pricingStrategy)
+	p := abs.AbstractInstanciatedResource.ConvertToPricedResource(t, request)
 	priced := p.(*PricedResource)
 	return &PricedDataResource{
 		PricedResource: *priced,
@@ -137,6 +136,10 @@ func (p *DataResourcePricingProfile) GetPrice(amountOfData float64, explicitDura
 	return p.Pricing.GetPrice(amountOfData, explicitDuration, start, &end)
 }
 
+func (p *DataResourcePricingProfile) GetPurchase() pricing.BuyingStrategy {
+	return p.Pricing.BuyingStrategy
+}
+
 func (p *DataResourcePricingProfile) IsPurchasable() bool {
 	return p.Pricing.BuyingStrategy != pricing.UNDEFINED_SUBSCRIPTION
 }
@@ -166,11 +169,8 @@ func (r *PricedDataResource) GetPrice() (float64, error) {
 		r.UsageEnd = &add
 	}
 	if r.SelectedPricing == nil {
-		if len(r.PricingProfiles) == 0 {
 		return 0, errors.New("pricing profile must be set on Priced Data" + r.ResourceID)
 	}
-		r.SelectedPricing = r.PricingProfiles[0]
-	}
 	pricing := r.SelectedPricing
 	var err error
 	amountOfData := float64(1)

models/resources/interfaces.go

@@ -9,9 +9,9 @@ import (
 type ResourceInterface interface {
 	utils.DBObject
 	Trim()
-	ConvertToPricedResource(t tools.DataType, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) pricing.PricedItemITF
+	ConvertToPricedResource(t tools.DataType, request *tools.APIRequest) pricing.PricedItemITF
 	GetType() string
-	GetSelectedInstance() utils.DBObject
+	GetSelectedInstance() ResourceInstanceITF
 	ClearEnv() utils.DBObject
 	SetAllowedInstances(request *tools.APIRequest)
 }
@@ -22,15 +22,15 @@ type ResourceInstanceITF interface {
 	GetName() string
 	StoreDraftDefault()
 	ClearEnv()
-	GetPricingsProfiles(peerID string, groups []string, buyingStrategy int, pricingStrategy int) []pricing.PricingProfileITF
+	GetProfile() pricing.PricingProfileITF
+	GetPricingsProfiles(peerID string, groups []string) []pricing.PricingProfileITF
 	GetPeerGroups() ([]ResourcePartnerITF, []map[string][]string)
 	ClearPeerGroups()
-	GetSelectedPartnership() ResourcePartnerITF
 	GetPartnerships(peerID string, groups []string) []ResourcePartnerITF
 }
 
 type ResourcePartnerITF interface {
-	GetPricingsProfiles(peerID string, groups []string, buyingStrategy int, pricingStrategy int) []pricing.PricingProfileITF
+	GetPricingsProfiles(peerID string, groups []string) []pricing.PricingProfileITF
 	GetPeerGroups() map[string][]string
 	ClearPeerGroups()
 }

models/resources/priced_resource.go

@@ -13,7 +13,6 @@ type PricedResource struct {
 	Name                     string                    `json:"name,omitempty" bson:"name,omitempty"`
 	Logo                     string                    `json:"logo,omitempty" bson:"logo,omitempty"`
 	InstancesRefs            map[string]string         `json:"instances_refs,omitempty" bson:"instances_refs,omitempty"`
-	PricingProfiles          []pricing.PricingProfileITF `json:"pricing_profiles,omitempty" bson:"pricing_profiles,omitempty"`
 	SelectedPricing          pricing.PricingProfileITF `json:"selected_pricing,omitempty" bson:"selected_pricing,omitempty"`
 	ExplicitBookingDurationS float64                   `json:"explicit_location_duration_s,omitempty" bson:"explicit_location_duration_s,omitempty"`
 	UsageStart               *time.Time                `json:"start,omitempty" bson:"start,omitempty"`
@@ -23,6 +22,10 @@ type PricedResource struct {
 	ResourceType             tools.DataType            `json:"resource_type,omitempty" bson:"resource_type,omitempty"`
 }
 
+func (abs *PricedResource) SelectPricing() pricing.PricingProfileITF {
+	return abs.SelectedPricing
+}
+
 func (abs *PricedResource) GetID() string {
 	return abs.ResourceID
 }
@@ -90,11 +93,8 @@ func (r *PricedResource) GetPrice() (float64, error) {
 		r.UsageEnd = &add
 	}
 	if r.SelectedPricing == nil {
-		if len(r.PricingProfiles) == 0 {
 		return 0, errors.New("pricing profile must be set on Priced Resource " + r.ResourceID)
 	}
-		r.SelectedPricing = r.PricingProfiles[0]
-	}
 	pricing := r.SelectedPricing
 	return pricing.GetPrice(1, 0, *r.UsageStart, *r.UsageEnd)
 }

models/resources/processing.go

@@ -85,6 +85,10 @@ func (p *ProcessingResourcePricingProfile) IsBooked() bool {
 	return p.Pricing.BuyingStrategy != pricing.PERMANENT
 }
 
+func (p *ProcessingResourcePricingProfile) GetPurchase() pricing.BuyingStrategy {
+	return p.Pricing.BuyingStrategy
+}
+
 func (p *ProcessingResourcePricingProfile) GetPrice(amountOfData float64, val float64, start time.Time, end time.Time, params ...string) (float64, error) {
 	return p.Pricing.GetPrice(amountOfData, val, start, &end)
 }

models/resources/resource.go

@@ -24,7 +24,7 @@ type AbstractResource struct {
 	SelectedInstanceIndex *int          `json:"selected_instance_index,omitempty" bson:"selected_instance_index,omitempty"` // SelectedInstance is the selected instance
 }
 
-func (r *AbstractResource) GetSelectedInstance() utils.DBObject {
+func (r *AbstractResource) GetSelectedInstance() ResourceInstanceITF {
 	return nil
 }
 
@@ -52,13 +52,19 @@ type AbstractInstanciatedResource[T ResourceInstanceITF] struct {
 	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]) ConvertToPricedResource(
+func (abs *AbstractInstanciatedResource[T]) ConvertToPricedResource(t tools.DataType, request *tools.APIRequest) pricing.PricedItemITF {
-	t tools.DataType, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) pricing.PricedItemITF {
 	instances := map[string]string{}
 	profiles := []pricing.PricingProfileITF{}
 	for _, instance := range abs.Instances {
 		instances[instance.GetID()] = instance.GetName()
-		profiles = instance.GetPricingsProfiles(request.PeerID, request.Groups, buyingStrategy, pricingStrategy)
+		profiles = instance.GetPricingsProfiles(request.PeerID, request.Groups)
+	}
+	var profile pricing.PricingProfileITF
+	if t := abs.GetSelectedInstance(); t != nil {
+		profile = t.GetProfile()
+	}
+	if profile == nil && len(profiles) > 0 {
+		profile = profiles[0]
 	}
 	return &PricedResource{
 		Name:            abs.Name,
@@ -66,7 +72,7 @@ func (abs *AbstractInstanciatedResource[T]) ConvertToPricedResource(
 		ResourceID:      abs.UUID,
 		ResourceType:    t,
 		InstancesRefs:   instances,
-		PricingProfiles: profiles,
+		SelectedPricing: profile,
 		CreatorID:       abs.CreatorID,
 	}
 }
@@ -78,7 +84,7 @@ func (abs *AbstractInstanciatedResource[T]) ClearEnv() utils.DBObject {
 	return abs
 }
 
-func (r *AbstractInstanciatedResource[T]) GetSelectedInstance() utils.DBObject {
+func (r *AbstractInstanciatedResource[T]) GetSelectedInstance() ResourceInstanceITF {
 	if r.SelectedInstanceIndex != nil && len(r.Instances) > *r.SelectedInstanceIndex {
 		return r.Instances[*r.SelectedInstanceIndex]
 	}
@@ -150,26 +156,20 @@ type ResourceInstance[T ResourcePartnerITF] struct {
 	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"` // SelectedInstance is the selected instance
+	SelectedPricing pricing.PricingProfileITF `json:"selected_pricing,omitempty" bson:"selected_pricing,omitempty"`
 	Partnerships    []T                       `json:"partnerships,omitempty" bson:"partnerships,omitempty"`
 }
 
-func (r *ResourceInstance[T]) GetSelectedPartnership() ResourcePartnerITF {
-	if r.SelectedPartnershipIndex != nil && len(r.Partnerships) > *r.SelectedPartnershipIndex {
-		return r.Partnerships[*r.SelectedPartnershipIndex]
-	}
-	if len(r.Partnerships) > 0 {
-		return r.Partnerships[0]
-	}
-	return nil
-}
-
 func (ri *ResourceInstance[T]) ClearEnv() {
 	ri.Env = []models.Param{}
 	ri.Inputs = []models.Param{}
 	ri.Outputs = []models.Param{}
 }
 
+func (ri *ResourceInstance[T]) GetProfile() pricing.PricingProfileITF {
+	return ri.SelectedPricing
+}
+
 func (ri *ResourceInstance[T]) GetPartnerships(peerID string, groups []string) []ResourcePartnerITF {
 	partners := []ResourcePartnerITF{}
 	for _, p := range ri.Partnerships {
@@ -184,10 +184,10 @@ func (ri *ResourceInstance[T]) GetPartnerships(peerID string, groups []string) [
 	return partners
 }
 
-func (ri *ResourceInstance[T]) GetPricingsProfiles(peerID string, groups []string, buyingStrategy int, pricingStrategy int) []pricing.PricingProfileITF {
+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, buyingStrategy, pricingStrategy)...)
+		pricings = append(pricings, p.GetPricingsProfiles(peerID, groups)...)
 	}
 	return pricings
 }
@@ -222,16 +222,16 @@ 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, buyingStrategy int, pricingStrategy int) []pricing.PricingProfileITF {
+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 buyingS, ri := range ri.PricingProfiles {
+			for _, ri := range ri.PricingProfiles {
-				if _, ok := ri[pricingStrategy]; ok && buyingS == buyingStrategy {
+				for _, i := range ri {
-					profiles = append(profiles, ri[pricingStrategy])
+					profiles = append(profiles, i)
 				}
 			}
 			return profiles

models/resources/storage.go

@@ -30,12 +30,11 @@ func (r *StorageResource) GetType() string {
 	return tools.STORAGE_RESOURCE.String()
 }
 
-func (abs *StorageResource) ConvertToPricedResource(
+func (abs *StorageResource) ConvertToPricedResource(t tools.DataType, request *tools.APIRequest) pricing.PricedItemITF {
-	t tools.DataType, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) pricing.PricedItemITF {
 	if t != tools.STORAGE_RESOURCE {
 		return nil
 	}
-	p := abs.AbstractInstanciatedResource.ConvertToPricedResource(t, request, buyingStrategy, pricingStrategy)
+	p := abs.AbstractInstanciatedResource.ConvertToPricedResource(t, request)
 	priced := p.(*PricedResource)
 	return &PricedStorageResource{
 		PricedResource: *priced,
@@ -153,6 +152,10 @@ type StorageResourcePricingProfile struct {
 	pricing.ExploitPricingProfile[StorageResourcePricingStrategy] // ExploitPricingProfile is the pricing profile of a storage it means that we exploit the resource for an amount of continuous time
 }
 
+func (p *StorageResourcePricingProfile) GetPurchase() pricing.BuyingStrategy {
+	return p.Pricing.BuyingStrategy
+}
+
 func (p *StorageResourcePricingProfile) IsPurchasable() bool {
 	return p.Pricing.BuyingStrategy != pricing.UNDEFINED_SUBSCRIPTION
 }
@@ -188,11 +191,8 @@ func (r *PricedStorageResource) GetPrice() (float64, error) {
 		r.UsageEnd = &add
 	}
 	if r.SelectedPricing == nil {
-		if len(r.PricingProfiles) == 0 {
 		return 0, errors.New("pricing profile must be set on Priced Storage" + r.ResourceID)
 	}
-		r.SelectedPricing = r.PricingProfiles[0]
-	}
 	pricing := r.SelectedPricing
 	var err error
 	amountOfData := float64(1)

models/resources/tests/compute_test.go

@@ -30,7 +30,7 @@ func TestComputeResource_ConvertToPricedResource(t *testing.T) {
 	cr := &resources.ComputeResource{}
 	cr.UUID = "comp123"
 	cr.AbstractInstanciatedResource.UUID = cr.UUID
-	result := cr.ConvertToPricedResource(tools.COMPUTE_RESOURCE, req, 0, 0)
+	result := cr.ConvertToPricedResource(tools.COMPUTE_RESOURCE, req)
 	assert.NotNil(t, result)
 	assert.IsType(t, &resources.PricedComputeResource{}, result)
 }
@@ -62,20 +62,9 @@ func TestComputeResourcePricingProfile_GetPrice_InvalidParams(t *testing.T) {
 func TestPricedComputeResource_GetPrice(t *testing.T) {
 	start := time.Now()
 	end := start.Add(1 * time.Hour)
-	profile := &resources.ComputeResourcePricingProfile{
-		CPUsPrices: map[string]float64{"Xeon": 1.0},
-		GPUsPrices: map[string]float64{"Tesla": 2.0},
-		RAMPrice:   0.5,
-		ExploitPricingProfile: pricing.ExploitPricingProfile[pricing.TimePricingStrategy]{
-			AccessPricingProfile: pricing.AccessPricingProfile[pricing.TimePricingStrategy]{
-				Pricing: pricing.PricingStrategy[pricing.TimePricingStrategy]{Price: 1.0},
-			},
-		},
-	}
 	r := resources.PricedComputeResource{
 		PricedResource: resources.PricedResource{
 			ResourceID:               "comp456",
-			PricingProfiles:          []pricing.PricingProfileITF{profile},
 			UsageStart:               &start,
 			UsageEnd:                 &end,
 			ExplicitBookingDurationS: 3600,

models/resources/tests/data_test.go

@@ -27,10 +27,10 @@ func TestDataResource_GetAccessor(t *testing.T) {
 func TestDataResource_ConvertToPricedResource(t *testing.T) {
 	d := &resources.DataResource{}
 	d.UUID = "123"
-	res := d.ConvertToPricedResource(tools.DATA_RESOURCE, &tools.APIRequest{}, 0, 0)
+	res := d.ConvertToPricedResource(tools.DATA_RESOURCE, &tools.APIRequest{})
 	assert.IsType(t, &resources.PricedDataResource{}, res)
 
-	nilRes := d.ConvertToPricedResource(tools.PROCESSING_RESOURCE, &tools.APIRequest{}, 0, 0)
+	nilRes := d.ConvertToPricedResource(tools.PROCESSING_RESOURCE, &tools.APIRequest{})
 	assert.Nil(t, nilRes)
 }
 
@@ -94,9 +94,6 @@ func TestPricedDataResource_GetPrice(t *testing.T) {
 		PricedResource: resources.PricedResource{
 			UsageStart: &now,
 			UsageEnd:   &later,
-			PricingProfiles: []pricing.PricingProfileITF{
-				pricingProfile,
-			},
 		},
 	}
 

models/resources/tests/priced_resource_test.go

@@ -101,9 +101,7 @@ func TestGetPrice(t *testing.T) {
 	t.Run("uses first profile if selected is nil", func(t *testing.T) {
 		start := time.Now()
 		end := start.Add(30 * time.Minute)
-		mock := &MockPricingProfile{ReturnCost: 42.0}
 		r := &resources.PricedResource{
-			PricingProfiles: []pricing.PricingProfileITF{mock},
 			UsageStart: &start,
 			UsageEnd:   &end,
 		}

models/resources/tests/resource_test.go

@@ -20,7 +20,7 @@ func (m *MockInstance) GetID() string    { return m.ID }
 func (m *MockInstance) GetName() string  { return m.Name }
 func (m *MockInstance) ClearEnv()        {}
 func (m *MockInstance) ClearPeerGroups() {}
-func (m *MockInstance) GetPricingsProfiles(string, []string, int, int) []pricing.PricingProfileITF {
+func (m *MockInstance) GetPricingsProfiles(string, []string) []pricing.PricingProfileITF {
 	return nil
 }
 func (m *MockInstance) GetPeerGroups() ([]resources.ResourcePartnerITF, []map[string][]string) {
@@ -37,7 +37,7 @@ func (m *MockPartner) GetPeerGroups() map[string][]string {
 	return m.groups
 }
 func (m *MockPartner) ClearPeerGroups() {}
-func (m *MockPartner) GetPricingsProfiles(string, []string, int, int) []pricing.PricingProfileITF {
+func (m *MockPartner) GetPricingsProfiles(string, []string) []pricing.PricingProfileITF {
 	return nil
 }
 

models/resources/tests/storage_test.go

@@ -26,14 +26,14 @@ func TestStorageResource_ConvertToPricedResource_ValidType(t *testing.T) {
 	res := &resources.StorageResource{}
 	res.AbstractInstanciatedResource.CreatorID = "creator"
 	res.AbstractInstanciatedResource.UUID = "res-id"
-	priced := res.ConvertToPricedResource(tools.STORAGE_RESOURCE, &tools.APIRequest{}, 0, 0)
+	priced := res.ConvertToPricedResource(tools.STORAGE_RESOURCE, &tools.APIRequest{})
 	assert.NotNil(t, priced)
 	assert.IsType(t, &resources.PricedStorageResource{}, priced)
 }
 
 func TestStorageResource_ConvertToPricedResource_InvalidType(t *testing.T) {
 	res := &resources.StorageResource{}
-	priced := res.ConvertToPricedResource(tools.COMPUTE_RESOURCE, &tools.APIRequest{}, 0, 0)
+	priced := res.ConvertToPricedResource(tools.COMPUTE_RESOURCE, &tools.APIRequest{})
 	assert.Nil(t, priced)
 }
 

models/resources/tests/workflow_test.go

@@ -32,7 +32,7 @@ func TestWorkflowResource_ConvertToPricedResource(t *testing.T) {
 		Groups: []string{"group1"},
 	}
 
-	pr := w.ConvertToPricedResource(tools.WORKFLOW_RESOURCE, req, 0, 0)
+	pr := w.ConvertToPricedResource(tools.WORKFLOW_RESOURCE, req)
 	assert.Equal(t, "creator-id", pr.GetCreatorID())
 	assert.Equal(t, tools.WORKFLOW_RESOURCE, pr.GetType())
 }

models/resources/workflow.go

@@ -16,7 +16,7 @@ type WorkflowResource struct {
 }
 
 func (d *WorkflowResource) GetAccessor(request *tools.APIRequest) utils.Accessor {
-	return NewAccessor[*ComputeResource](tools.WORKFLOW_RESOURCE, request, func() utils.DBObject { return &WorkflowResource{} })
+	return NewAccessor[*WorkflowResource](tools.WORKFLOW_RESOURCE, request, func() utils.DBObject { return &WorkflowResource{} })
 }
 
 func (r *WorkflowResource) GetType() string {
@@ -34,8 +34,7 @@ func (w *WorkflowResource) SetAllowedInstances(request *tools.APIRequest) {
 	/* EMPTY */
 }
 
-func (w *WorkflowResource) ConvertToPricedResource(
+func (w *WorkflowResource) ConvertToPricedResource(t tools.DataType, request *tools.APIRequest) pricing.PricedItemITF {
-	t tools.DataType, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) pricing.PricedItemITF {
 	return &PricedResource{
 		Name:         w.Name,
 		Logo:         w.Logo,

models/workflow/graph/graph.go

@@ -55,7 +55,7 @@ func (wf *Graph) IsWorkflow(item GraphItem) bool {
 }
 
 func (g *Graph) GetAverageTimeRelatedToProcessingActivity(start time.Time, processings []*resources.ProcessingResource, resource resources.ResourceInterface,
-	f func(GraphItem) resources.ResourceInterface, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) (float64, float64) {
+	f func(GraphItem) resources.ResourceInterface, request *tools.APIRequest) (float64, float64) {
 	nearestStart := float64(10000000000)
 	oneIsInfinite := false
 	longestDuration := float64(0)
@@ -67,7 +67,7 @@ func (g *Graph) GetAverageTimeRelatedToProcessingActivity(start time.Time, proce
 			} else if link.Source.ID == processing.GetID() && f(g.Items[link.Source.ID]) != nil && f(g.Items[link.Source.ID]).GetID() == resource.GetID() { // if the source is the processing and the destination is not a compute
 				source = link.Destination.ID
 			}
-			priced := processing.ConvertToPricedResource(tools.PROCESSING_RESOURCE, request, buyingStrategy, pricingStrategy)
+			priced := processing.ConvertToPricedResource(tools.PROCESSING_RESOURCE, request)
 			if source != "" {
 				if priced.GetLocationStart() != nil {
 					near := float64(priced.GetLocationStart().Sub(start).Seconds())
@@ -96,7 +96,7 @@ func (g *Graph) GetAverageTimeRelatedToProcessingActivity(start time.Time, proce
 /*
 * GetAverageTimeBeforeStart is a function that returns the average time before the start of a processing
  */
-func (g *Graph) GetAverageTimeProcessingBeforeStart(average float64, processingID string, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) float64 {
+func (g *Graph) GetAverageTimeProcessingBeforeStart(average float64, processingID string, request *tools.APIRequest) float64 {
 	currents := []float64{}        // list of current time
 	for _, link := range g.Links { // for each link
 		var source string                                                                     // source is the source of the link
@@ -112,12 +112,12 @@ func (g *Graph) GetAverageTimeProcessingBeforeStart(average float64, processingI
 		if r == nil {                  // if item is nil, continue
 			continue
 		}
-		priced := r.ConvertToPricedResource(dt, request, buyingStrategy, pricingStrategy)
+		priced := r.ConvertToPricedResource(dt, request)
 		current := priced.GetExplicitDurationInS() // get the explicit duration of the item
 		if current < 0 {                           // if current is negative, its means that duration of a before could be infinite continue
 			return current
 		}
-		current += g.GetAverageTimeProcessingBeforeStart(current, source, request, buyingStrategy, pricingStrategy) // get the average time before start of the source
+		current += g.GetAverageTimeProcessingBeforeStart(current, source, request) // get the average time before start of the source
 		currents = append(currents, current)                                       // append the current to the currents
 	}
 	var max float64 // get the max time to wait dependancies to finish

models/workflow/workflow.go

@@ -83,7 +83,7 @@ func (w *Workflow) GetPricedItem(
 	for _, item := range w.Graph.Items {
 		if f(item) {
 			dt, res := item.GetResource()
-			ord := res.ConvertToPricedResource(dt, request, buyingStrategy, pricingStrategy)
+			ord := res.ConvertToPricedResource(dt, request)
 			list_datas[res.GetID()] = ord
 		}
 	}
@@ -166,12 +166,11 @@ func (wfa *Workflow) CheckBooking(caller *tools.HTTPCaller) (bool, error) {
 	return true, nil
 }
 
-func (wf *Workflow) Planify(start time.Time, end *time.Time, request *tools.APIRequest, buyingStrategy int, pricingStrategy int) (float64, map[tools.DataType]map[string]pricing.PricedItemITF, *Workflow, error) {
+func (wf *Workflow) Planify(start time.Time, end *time.Time, request *tools.APIRequest) (float64, map[tools.DataType]map[string]pricing.PricedItemITF, *Workflow, error) {
 	priceds := map[tools.DataType]map[string]pricing.PricedItemITF{}
-	ps, priceds, err := plan[*resources.ProcessingResource](tools.PROCESSING_RESOURCE, wf, priceds, request,
+	ps, priceds, err := plan[*resources.ProcessingResource](tools.PROCESSING_RESOURCE, wf, priceds, request, wf.Graph.IsProcessing,
-		buyingStrategy, pricingStrategy, wf.Graph.IsProcessing,
 		func(res resources.ResourceInterface, priced pricing.PricedItemITF) (time.Time, float64) {
-			return start.Add(time.Duration(wf.Graph.GetAverageTimeProcessingBeforeStart(0, res.GetID(), request, buyingStrategy, pricingStrategy)) * time.Second), priced.GetExplicitDurationInS()
+			return start.Add(time.Duration(wf.Graph.GetAverageTimeProcessingBeforeStart(0, res.GetID(), request)) * time.Second), priced.GetExplicitDurationInS()
 		}, func(started time.Time, duration float64) *time.Time {
 			s := started.Add(time.Duration(duration))
 			return &s
@@ -179,7 +178,7 @@ func (wf *Workflow) Planify(start time.Time, end *time.Time, request *tools.APIR
 	if err != nil {
 		return 0, priceds, nil, err
 	}
-	if _, priceds, err = plan[resources.ResourceInterface](tools.DATA_RESOURCE, wf, priceds, request, buyingStrategy, pricingStrategy,
+	if _, priceds, err = plan[resources.ResourceInterface](tools.DATA_RESOURCE, wf, priceds, request,
 		wf.Graph.IsData, func(res resources.ResourceInterface, priced pricing.PricedItemITF) (time.Time, float64) {
 			return start, 0
 		}, func(started time.Time, duration float64) *time.Time {
@@ -188,14 +187,14 @@ func (wf *Workflow) Planify(start time.Time, end *time.Time, request *tools.APIR
 		return 0, priceds, nil, err
 	}
 	for k, f := range map[tools.DataType]func(graph.GraphItem) bool{tools.STORAGE_RESOURCE: wf.Graph.IsStorage, tools.COMPUTE_RESOURCE: wf.Graph.IsCompute} {
-		if _, priceds, err = plan[resources.ResourceInterface](k, wf, priceds, request, buyingStrategy, pricingStrategy,
+		if _, priceds, err = plan[resources.ResourceInterface](k, wf, priceds, request,
 			f, func(res resources.ResourceInterface, priced pricing.PricedItemITF) (time.Time, float64) {
 				nearestStart, longestDuration := wf.Graph.GetAverageTimeRelatedToProcessingActivity(start, ps, res, func(i graph.GraphItem) (r resources.ResourceInterface) {
 					if f(i) {
 						_, r = i.GetResource()
 					}
 					return r
-				}, request, buyingStrategy, pricingStrategy)
+				}, request)
 				return start.Add(time.Duration(nearestStart) * time.Second), longestDuration
 			}, func(started time.Time, duration float64) *time.Time {
 				s := started.Add(time.Duration(duration))
@@ -205,8 +204,7 @@ func (wf *Workflow) Planify(start time.Time, end *time.Time, request *tools.APIR
 		}
 	}
 	longest := common.GetPlannerLongestTime(end, priceds, request)
-	if _, priceds, err = plan[resources.ResourceInterface](tools.WORKFLOW_RESOURCE, wf, priceds, request,
+	if _, priceds, err = plan[resources.ResourceInterface](tools.WORKFLOW_RESOURCE, wf, priceds, request, wf.Graph.IsWorkflow,
-		buyingStrategy, pricingStrategy, wf.Graph.IsWorkflow,
 		func(res resources.ResourceInterface, priced pricing.PricedItemITF) (time.Time, float64) {
 			start := start.Add(time.Duration(common.GetPlannerNearestStart(start, priceds, request)) * time.Second)
 			longest := float64(-1)
@@ -214,7 +212,7 @@ func (wf *Workflow) Planify(start time.Time, end *time.Time, request *tools.APIR
 			if code != 200 || err != nil {
 				return start, longest
 			}
-			if neoLongest, _, _, err := r.(*Workflow).Planify(start, end, request, buyingStrategy, pricingStrategy); err != nil {
+			if neoLongest, _, _, err := r.(*Workflow).Planify(start, end, request); err != nil {
 				return start, longest
 			} else if neoLongest > longest {
 				longest = neoLongest
@@ -231,7 +229,6 @@ func (wf *Workflow) Planify(start time.Time, end *time.Time, request *tools.APIR
 
 func plan[T resources.ResourceInterface](
 	dt tools.DataType, wf *Workflow, priceds map[tools.DataType]map[string]pricing.PricedItemITF, request *tools.APIRequest,
-	buyingStrategy int, pricingStrategy int,
 	f func(graph.GraphItem) bool, start func(resources.ResourceInterface, pricing.PricedItemITF) (time.Time, float64), end func(time.Time, float64) *time.Time) ([]T, map[tools.DataType]map[string]pricing.PricedItemITF, error) {
 	resources := []T{}
 	for _, item := range wf.GetGraphItems(f) {
@@ -242,7 +239,10 @@ func plan[T resources.ResourceInterface](
 		if realItem == nil {
 			return resources, priceds, errors.New("could not load the processing resource")
 		}
-		priced := realItem.ConvertToPricedResource(dt, request, buyingStrategy, pricingStrategy)
+		priced := realItem.ConvertToPricedResource(dt, request)
+		if priced.SelectPricing() == nil {
+			return resources, priceds, errors.New("no pricings are selected... can't proceed")
+		}
 		started, duration := start(realItem, priced)
 		priced.SetLocationStart(started)
 		if duration >= 0 {

models/workflow_execution/workflow_scheduler.go

@@ -37,8 +37,6 @@ type WorkflowSchedule struct {
 	DurationS         float64              `json:"duration_s" default:"-1"`               // End is the end time of the schedule
 	Cron              string               `json:"cron,omitempty"`                        // here the cron format : ss mm hh dd MM dw task
 
-	SelectedBuyingStrategy  pricing.BuyingStrategy  `json:"selected_buying_strategy"`
-	SelectedPricingStrategy int                     `json:"selected_pricing_strategy"`
 	SelectedBillingStrategy pricing.BillingStrategy `json:"selected_billing_strategy"`
 }
 
@@ -70,7 +68,7 @@ func (ws *WorkflowSchedule) GetBuyAndBook(wfID string, request *tools.APIRequest
 		return false, nil, []*WorkflowExecution{}, []*purchase_resource.PurchaseResource{}, []*booking.Booking{}, errors.New("could not load the workflow with id: " + err.Error())
 	}
 	wf := res.(*workflow.Workflow)
-	longest, priceds, wf, err := wf.Planify(ws.Start, ws.End, request, int(ws.SelectedBuyingStrategy), ws.SelectedPricingStrategy)
+	longest, priceds, wf, err := wf.Planify(ws.Start, ws.End, request)
 	if err != nil {
 		return false, wf, []*WorkflowExecution{}, []*purchase_resource.PurchaseResource{}, []*booking.Booking{}, err
 	}
@@ -90,10 +88,6 @@ func (ws *WorkflowSchedule) GetBuyAndBook(wfID string, request *tools.APIRequest
 		bookings = append(bookings, exec.Book(ws.UUID, wfID, priceds)...)
 	}
 
-	if err := ws.GenerateOrder(purchased, bookings, request); err != nil {
-		return false, wf, execs, purchased, bookings, err
-	}
-
 	errCh := make(chan error, len(bookings))
 	var m sync.Mutex
 
@@ -107,6 +101,10 @@ func (ws *WorkflowSchedule) GetBuyAndBook(wfID string, request *tools.APIRequest
 		}
 	}
 
+	if err := ws.GenerateOrder(purchased, bookings, request); err != nil {
+		return false, wf, execs, purchased, bookings, err
+	}
+
 	return true, wf, execs, purchased, bookings, nil
 }
 
@@ -122,7 +120,7 @@ func (ws *WorkflowSchedule) GenerateOrder(purchases []*purchase_resource.Purchas
 		Status:       enum.PENDING,
 	}
 	if res, _, err := order.NewAccessor(request).StoreOne(newOrder); err == nil {
-		if _, err := bill.DraftBill(res.(*order.Order), request); err != nil {
+		if _, err := bill.DraftFirstBill(res.(*order.Order), request); err != nil {
 			return err
 		}
 		return nil