package drafts

import (
	"time"

	"rmser/internal/domain/catalog"

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

const (
	StatusProcessing    = "PROCESSING"
	StatusReadyToVerify = "READY_TO_VERIFY"
	StatusCompleted     = "COMPLETED"
	StatusError         = "ERROR"
	StatusCanceled      = "CANCELED"
	StatusDeleted       = "DELETED"
)

type DraftInvoice struct {
	ID uuid.UUID `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`

	// Привязка к аккаунту и серверу
	UserID      uuid.UUID `gorm:"type:uuid;not null;index" json:"user_id"`       // Кто загрузил (автор)
	RMSServerID uuid.UUID `gorm:"type:uuid;not null;index" json:"rms_server_id"` // К какому серверу относится

	SenderPhotoURL string `gorm:"type:text" json:"photo_url"`
	Status         string `gorm:"type:varchar(50);default:'PROCESSING'" json:"status"`

	DocumentNumber string     `gorm:"type:varchar(100)" json:"document_number"`
	DateIncoming   *time.Time `json:"date_incoming"`
	SupplierID     *uuid.UUID `gorm:"type:uuid" json:"supplier_id"`

	StoreID *uuid.UUID     `gorm:"type:uuid" json:"store_id"`
	Store   *catalog.Store `gorm:"foreignKey:StoreID" json:"store,omitempty"`

	Comment      string     `gorm:"type:text" json:"comment"`
	RMSInvoiceID *uuid.UUID `gorm:"type:uuid" json:"rms_invoice_id"`

	Items []DraftInvoiceItem `gorm:"foreignKey:DraftID;constraint:OnDelete:CASCADE" json:"items"`

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

type DraftInvoiceItem struct {
	ID      uuid.UUID `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
	DraftID uuid.UUID `gorm:"type:uuid;not null;index" json:"draft_id"`

	RawName   string          `gorm:"type:varchar(255);not null" json:"raw_name"`
	RawAmount decimal.Decimal `gorm:"type:numeric(19,4)" json:"raw_amount"`
	RawPrice  decimal.Decimal `gorm:"type:numeric(19,4)" json:"raw_price"`

	ProductID   *uuid.UUID                `gorm:"type:uuid;index" json:"product_id"`
	Product     *catalog.Product          `gorm:"foreignKey:ProductID" json:"product,omitempty"`
	ContainerID *uuid.UUID                `gorm:"type:uuid;index" json:"container_id"`
	Container   *catalog.ProductContainer `gorm:"foreignKey:ContainerID" json:"container,omitempty"`

	Quantity decimal.Decimal `gorm:"type:numeric(19,4);default:0" json:"quantity"`
	Price    decimal.Decimal `gorm:"type:numeric(19,4);default:0" json:"price"`
	Sum      decimal.Decimal `gorm:"type:numeric(19,4);default:0" json:"sum"`

	IsMatched bool `gorm:"default:false" json:"is_matched"`
}

type Repository interface {
	Create(draft *DraftInvoice) error
	GetByID(id uuid.UUID) (*DraftInvoice, error)
	Update(draft *DraftInvoice) error
	CreateItems(items []DraftInvoiceItem) error
	UpdateItem(itemID uuid.UUID, productID *uuid.UUID, containerID *uuid.UUID, qty, price decimal.Decimal) error
	CreateItem(item *DraftInvoiceItem) error
	DeleteItem(itemID uuid.UUID) error
	Delete(id uuid.UUID) error

	// GetActive возвращает активные черновики для СЕРВЕРА (а не юзера)
	GetActive(serverID uuid.UUID) ([]DraftInvoice, error)
}