package models

import (
	"time"

	"github.com/google/uuid"
)

type Inventory struct {
	ID           uuid.UUID
	OutletID     uuid.UUID
	ProductID    uuid.UUID
	Quantity     int
	ReorderLevel int
	UpdatedAt    time.Time
}

type CreateInventoryRequest struct {
	OutletID     uuid.UUID
	ProductID    uuid.UUID
	Quantity     int
	ReorderLevel int
}

type UpdateInventoryRequest struct {
	Quantity     *int
	ReorderLevel *int
}

type InventoryAdjustmentRequest struct {
	Delta  int
	Reason string
}

type InventoryResponse struct {
	ID           uuid.UUID
	OutletID     uuid.UUID
	ProductID    uuid.UUID
	ProductName  string
	Quantity     int
	ReorderLevel int
	IsLowStock   bool
	UpdatedAt    time.Time
}

func (i *Inventory) IsLowStock() bool {
	return i.Quantity <= i.ReorderLevel
}

func (i *Inventory) CanFulfillOrder(requestedQuantity int) bool {
	return i.Quantity >= requestedQuantity
}

func (i *Inventory) AdjustQuantity(delta int) int {
	newQuantity := i.Quantity + delta
	if newQuantity < 0 {
		newQuantity = 0
	}
	return newQuantity
}