package entities

import (
	"fmt"
	"strings"
	"time"

	"github.com/google/uuid"
	"gorm.io/gorm"
)

type TInventoryMovementEntity struct {
	ID             uuid.UUID `gorm:"primaryKey;type:uuid;default:uuid_generate_v4()" json:"id"`
	MovementNumber string    `gorm:"type:varchar(100);" json:"movement_number"`
	MovementDate   time.Time `gorm:"type:timestamp;" json:"movement_date"`
	MovementType   string    `gorm:"type:varchar(50);" json:"movement_type"`
	Status         string    `gorm:"type:varchar(50);default:'draft'" json:"status"`

	SourceLocationID      uuid.UUID `gorm:"type:uuid;index;" json:"source_location_id"`
	DestinationLocationID uuid.UUID `gorm:"type:uuid;index;" json:"destination_location_id"`

	Client M_Client `gorm:"foreignKey:ClientID;references:ID"`

	FullAuditTrail
}

func (TInventoryMovementEntity) TableName() string {
	return "t_inventory_movements"
}

// GenerateDocumentNumber generates a new document number for a client
func GenerateDocumentNumberInvMovement(db *gorm.DB, clientId string) (string, error) {
	prefix := "MOVEMENT"

	// Ambil nama client berdasarkan clientId
	var client struct {
		Name string
	}
	if err := db.Table("m_clients").Select("name").Where("id = ?", clientId).First(&client).Error; err != nil {
		return "", fmt.Errorf("client not found")
	}
	if client.Name == "" {
		return "", fmt.Errorf("client name is empty")
	}
	words := strings.Fields(client.Name)
	initials := ""
	for _, w := range words {
		if len(w) > 0 {
			initials += strings.ToUpper(string(w[0]))
		}
	}
	// Cari document number terakhir untuk client ini
	var lastMovement TInventoryMovementEntity
	err := db.
		Where("client_id = ?", clientId).
		Order("movement_number DESC").
		First(&lastMovement).Error

	seq := 1
	if err == nil && lastMovement.MovementNumber != "" {
		parts := strings.Split(lastMovement.MovementNumber, "-")
		if len(parts) == 3 {
			fmt.Sscanf(parts[2], "%d", &seq)
			seq++
		}
	}

	docNum := fmt.Sprintf("%s-%s-%04d", prefix, initials, seq)
	return docNum, nil
}