package fertilizing

import (
	"wagfarm-api/assets/fertilizer"
	"wagfarm-api/database"
	"wagfarm-api/logs/generic"

	"github.com/shopspring/decimal"
	"gorm.io/gorm"
)

type FertilizingLog struct {
	generic.BaseExtendedLog
	FertilizerID uint                  `gorm:"not null"`
	Fertilizer   fertilizer.Fertilizer `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;not null"`
	Amount       float64               `gorm:"not null"` // in units of the fertilizer
}

func (l *FertilizingLog) AfterSave(db *gorm.DB) (err error) {
	// Example: compute cost as Amount * UnitPrice
	if l.FertilizerID == 0 {
		if err := db.First(&l.Fertilizer, l.FertilizerID).Error; err != nil {
			return err
		}
	}

	unitPrice := l.Fertilizer.Cost
	totalCost := unitPrice.Mul(decimal.NewFromFloat(l.Amount))
	l.UpdateCost(db, totalCost)

	return
}

func RegisterModels() { database.RegisterModel(&FertilizingLog{}) }