package entities

import (
	"fmt"
	"strings"
	"time"

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

type TInventoryRequestEntity struct {
	ID              uuid.UUID `gorm:"primaryKey;type:uuid;default:uuid_generate_v4()" json:"id"`
	ReferenceNumber string    `gorm:"type:varchar(100);" json:"reference_number"`
	DocumentNumber  string    `gorm:"type:varchar(100);" json:"document_number"`
	DocumentDate    time.Time `gorm:"type:timestamp;" json:"document_date"`
	DueDate         time.Time `gorm:"type:timestamp;" json:"due_date"`
	RequestType     string    `gorm:"type:varchar(50);" json:"request_type"`
	Note            string    `gorm:"type:text;" json:"note"`
	Status          string    `gorm:"type:varchar(50);default:'draft'" json:"status"`

	ClientID uuid.UUID `gorm:"type:uuid;index;" json:"client_id"`

	RequestLines []TInventoryRequestLineEntity `gorm:"foreignKey:InvRequestID;references:ID"`
	Assignment   TAssignmentEntity             `gorm:"-"`
	Client       M_Client                      `gorm:"foreignKey:ClientID;references:ID"`

	FullAuditTrail
}

func (TInventoryRequestEntity) TableName() string {
	return "t_inventory_requests"
}

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

	// 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 lastRequest TInventoryRequestEntity
	err := db.
		Where("client_id = ?", clientId).
		Order("document_number DESC").
		First(&lastRequest).Error

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

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