package catalog

import (
	"time"

	"github.com/google/uuid"
	"github.com/shopspring/decimal"
)

// MeasureUnit - Единица измерения (kg, l, pcs)
type MeasureUnit struct {
	ID   uuid.UUID `gorm:"type:uuid;primary_key;" json:"id"`
	Name string    `gorm:"type:varchar(50);not null" json:"name"`
	Code string    `gorm:"type:varchar(50)" json:"code"`
}

// ProductContainer - Фасовка (упаковка) товара
type ProductContainer struct {
	ID        uuid.UUID       `gorm:"type:uuid;primary_key;" json:"id"`
	ProductID uuid.UUID       `gorm:"type:uuid;index;not null" json:"product_id"`
	Name      string          `gorm:"type:varchar(100);not null" json:"name"`
	Count     decimal.Decimal `gorm:"type:numeric(19,4);not null" json:"count"` // Коэфф. пересчета
}

// Product - Номенклатура
type Product struct {
	ID           uuid.UUID       `gorm:"type:uuid;primary_key;" json:"id"`
	ParentID     *uuid.UUID      `gorm:"type:uuid;index" json:"parent_id"`
	Name         string          `gorm:"type:varchar(255);not null" json:"name"`
	Type         string          `gorm:"type:varchar(50);index" json:"type"` // GOODS, DISH, PREPARED
	Num          string          `gorm:"type:varchar(50)" json:"num"`
	Code         string          `gorm:"type:varchar(50)" json:"code"`
	UnitWeight   decimal.Decimal `gorm:"type:numeric(19,4)" json:"unit_weight"`
	UnitCapacity decimal.Decimal `gorm:"type:numeric(19,4)" json:"unit_capacity"`

	// Связь с единицей измерения
	MainUnitID *uuid.UUID   `gorm:"type:uuid;index" json:"main_unit_id"`
	MainUnit   *MeasureUnit `gorm:"foreignKey:MainUnitID" json:"main_unit,omitempty"`

	// Фасовки
	Containers []ProductContainer `gorm:"foreignKey:ProductID;constraint:OnDelete:CASCADE" json:"containers,omitempty"`

	IsDeleted bool `gorm:"default:false" json:"is_deleted"`

	Parent   *Product   `gorm:"foreignKey:ParentID" json:"-"`
	Children []*Product `gorm:"foreignKey:ParentID" json:"-"`

	CreatedAt time.Time `json:"created_at"`
	UpdatedAt time.Time `json:"updated_at"`
}

// Repository интерфейс для каталога
type Repository interface {
	SaveMeasureUnits(units []MeasureUnit) error
	SaveProducts(products []Product) error
	SaveContainer(container ProductContainer) error // Добавление фасовки
	Search(query string) ([]Product, error)
	GetAll() ([]Product, error)
	GetActiveGoods() ([]Product, error)
	// --- Stores ---
	SaveStores(stores []Store) error
	GetActiveStores() ([]Store, error)
}