package resources

import (
	"errors"
	"strings"
	"time"

	"cloud.o-forge.io/core/oc-lib/models/common"
	"cloud.o-forge.io/core/oc-lib/models/common/pricing"
	"cloud.o-forge.io/core/oc-lib/models/utils"
	"cloud.o-forge.io/core/oc-lib/tools"
)

/*
* ComputeResource is a struct that represents a compute resource
* it defines the resource compute
 */
type ComputeResource struct {
	AbstractResource[*ComputeResourceInstance]
	Architecture   string                    `json:"architecture,omitempty" bson:"architecture,omitempty"` // Architecture is the architecture
	Infrastructure common.InfrastructureType `json:"infrastructure,omitempty" bson:"infrastructure,omitempty"`
}

func (d *ComputeResource) GetAccessor(request *tools.APIRequest) utils.Accessor {
	return NewAccessor[*ComputeResource](tools.COMPUTE_RESOURCE, request, func() utils.DBObject { return &ComputeResource{} })
}

type ComputeResourceInstance struct {
	ResourceInstance[*ComputeResourcePartnership]
	SecurityLevel string                 `json:"security_level,omitempty" bson:"security_level,omitempty"`
	PowerSource   string                 `json:"power_source,omitempty" bson:"power_source,omitempty"`
	CPUs          map[string]*common.CPU `bson:"cpus,omitempty" json:"cpus,omitempty"` // CPUs is the list of CPUs key is model
	GPUs          map[string]*common.GPU `bson:"gpus,omitempty" json:"gpus,omitempty"` // GPUs is the list of GPUs key is model
	RAM           *common.RAM            `bson:"ram,omitempty" json:"ram,omitempty"`   // RAM is the RAM
}

type ComputeResourcePartnership struct {
	ResourcePartnerShip[*ComputeResourcePricingProfile]
	MaxAllowedCPUsCores    map[string]int     `json:"allowed_cpus,omitempty" bson:"allowed_cpus,omitempty"`
	MaxAllowedGPUsMemoryGB map[string]float64 `json:"allowed_gpus,omitempty" bson:"allowed_gpus,omitempty"`
	MaxAllowedRAMSize      float64            `json:"allowed_ram,omitempty" bson:"allowed_ram,omitempty"`
}

type ComputeResourcePricingProfileOptions struct {
	CPUCore     int     `json:"cpu_core" bson:"cpu_core" default:"1"`
	GPUMemoryGB float64 `json:"gpu_memory_gb" bson:"gpu_memory_gb" default:"1"`
	RAMSizeGB   float64 `json:"ram_size_gb" bson:"ram_size_gb" default:"1"`
}

type ComputeResourcePricingProfile struct {
	pricing.ExploitPricingProfile[pricing.TimePricingStrategy]
	Options ComputeResourcePricingProfileOptions `json:"options,omitempty" bson:"options,omitempty"` // Options is the options of the pricing profile
	// ExploitPricingProfile is the pricing profile of a compute it means that we exploit the resource for an amount of continuous time
	OverrideCPUsPrices map[string]float64 `json:"cpus_prices,omitempty" bson:"cpus_prices,omitempty"` // CPUsPrices is the prices of the CPUs
	OverrideGPUsPrices map[string]float64 `json:"gpus_prices,omitempty" bson:"gpus_prices,omitempty"` // GPUsPrices is the prices of the GPUs
	OverrideRAMPrice   float64            `json:"ram_price" bson:"ram_price" default:"-1"`            // RAMPrice is the price of the RAM
}

// PROBLEM

func (p *ComputeResourcePricingProfile) IsBuying() bool {
	return p.Pricing.BuyingStrategy != pricing.PAY_PER_USE
}

func (p *ComputeResourcePricingProfile) GetOverrideStrategyValue() int {
	return -1
}

// NOT A PROPER QUANTITY
// amountOfData is the number of CPUs, GPUs or RAM dependings on the params
func (p *ComputeResourcePricingProfile) GetPrice(amountOfData float64, explicitDuration float64, start time.Time, end time.Time, request *tools.APIRequest, params ...string) (float64, error) {
	if len(params) < 1 {
		return 0, errors.New("params must be set")
	}
	pp := float64(0)
	model := params[1]
	if strings.Contains(params[0], "cpus") && len(params) > 1 {
		if _, ok := p.OverrideCPUsPrices[model]; ok {
			p.Pricing.Price = p.OverrideCPUsPrices[model]
		}
		r, err := p.Pricing.GetPrice(amountOfData/float64(p.Options.CPUCore), explicitDuration, start, &end)
		if err != nil {
			return 0, err
		}
		pp += r

	}
	if strings.Contains(params[0], "gpus") && len(params) > 1 {
		if _, ok := p.OverrideGPUsPrices[model]; ok {
			p.Pricing.Price = p.OverrideGPUsPrices[model]
		}
		r, err := p.Pricing.GetPrice(amountOfData/float64(p.Options.GPUMemoryGB), explicitDuration, start, &end)
		if err != nil {
			return 0, err
		}
		pp += r
	}
	if strings.Contains(params[0], "ram") {
		if p.OverrideRAMPrice >= 0 {
			p.Pricing.Price = p.OverrideRAMPrice
		}
		r, err := p.Pricing.GetPrice(float64(amountOfData)/p.Options.RAMSizeGB, explicitDuration, start, &end)
		if err != nil {
			return 0, err
		}
		pp += r
	}
	return pp, nil
}

type CustomizedComputeResource struct {
	AbstractCustomizedResource[*ComputeResourceInstance]

	CPUsLocated map[string]float64 `json:"cpus_in_use" bson:"cpus_in_use"` // CPUsInUse is the list of CPUs in use
	GPUsLocated map[string]float64 `json:"gpus_in_use" bson:"gpus_in_use"` // GPUsInUse is the list of GPUs in use
	RAMLocated  float64            `json:"ram_in_use" bson:"ram_in_use"`   // RAMInUse is the RAM in use
}

func (r *CustomizedComputeResource) GetType() tools.DataType {
	return tools.COMPUTE_RESOURCE
}

func (r *CustomizedComputeResource) GetPrice(request *tools.APIRequest) (float64, error) {
	if r.UsageStart == nil || r.UsageEnd == nil {
		return 0, errors.New("Usage start and end must be set")
	}
	partner := r.GetPartnership(request)
	if partner != nil && partner.GetPricing(r.SelectedPricing) != nil {
		return 0, errors.New("Pricing strategy not found")
	}
	pricing := partner.GetPricing(r.SelectedPricing)
	price := float64(0)
	for _, l := range []map[string]float64{r.CPUsLocated, r.GPUsLocated} {
		for model, amountOfData := range l {
			cpus, err := pricing.GetPrice(float64(amountOfData), r.ExplicitBookingDurationS, *r.UsageStart, *r.UsageEnd, request, "cpus", model)
			if err != nil {
				return 0, err
			}
			price += cpus
		}
	}
	ram, err := pricing.GetPrice(r.RAMLocated, r.ExplicitBookingDurationS, *r.UsageStart, *r.UsageEnd, request, "ram")
	if err != nil {
		return 0, err
	}
	price += ram
	return price, nil
}

/*
* FillWithDefaultProcessingUsage fills the order item with the default processing usage
* it depends on the processing usage only if nothing is set, during order
 */
func (i *CustomizedComputeResource) FillWithDefaultProcessingUsage(usage *ProcessingUsage) {
	for _, cpu := range usage.CPUs {
		if _, ok := i.CPUsLocated[cpu.Model]; !ok {
			i.CPUsLocated[cpu.Model] = 0
		}
		if i.CPUsLocated[cpu.Model] < float64(cpu.Cores) {
			i.CPUsLocated[cpu.Model] = float64(cpu.Cores)
		}
	}
	for _, cpu := range usage.GPUs {
		i.GPUsLocated[cpu.Model] = 1
	}
	i.RAMLocated = usage.RAM.SizeGb
}