package models

import (
	"GoMembership/pkg/logger"
	"time"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
)

type Car struct {
	ID           uint `gorm:"primaryKey" json:"id"`
	CreatedAt    time.Time
	UpdatedAt    time.Time
	DeletedAt    *time.Time
	Status       uint        `json:"status"`
	Name         string      `json:"name"`
	Brand        string      `gorm:"not null" json:"brand"`
	Model        string      `gorm:"not null" json:"model"`
	Color        string      `gorm:"not null" json:"color"`
	LicencePlate string      `gorm:"not null,unique" json:"licence_plate"`
	Price        float32     `gorm:"type:decimal(10,2)" json:"price"`
	Rate         float32     `gorm:"type:decimal(10,2)" json:"rate"`
	StartDate    time.Time   `json:"start_date"`
	EndDate      time.Time   `json:"end_date"`
	Location     *Location   `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;" json:"location"`
	Damages      []Damage    `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;" json:"damages"`
	Insurances   []Insurance `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;many2many:car_insurances" json:"insurances"`
	Notes        string      `json:"notes"`
}

func (c *Car) Create(db *gorm.DB) error {
	return db.Transaction(func(tx *gorm.DB) error {
		if err := tx.Preload(clause.Associations).Create(c).Error; err != nil {
			return err
		}

		logger.Info.Printf("car created: %#v", c)
		return tx.
			Preload(clause.Associations).
			First(c, c.ID).Error
	})
}

func (c *Car) Update(db *gorm.DB) error {

	return db.Transaction(func(tx *gorm.DB) error {
		// Check if the user exists in the database
		var existingCar Car

		logger.Info.Printf("updating car: %#v", c)
		if err := tx.Preload("Damages.Insurance").
			Preload("Damages.Opponent").
			First(&existingCar, c.ID).Error; err != nil {
			return err
		}

		if err := tx.Session(&gorm.Session{FullSaveAssociations: true}).Updates(c).Error; err != nil {
			return err
		}
		// if err := tx.Model(c).Association("Damages").Replace(c.Damages); err != nil {
		// 	return err
		// }

		// if err := tx.Model(c).Association("Insurances").Replace(c.Insurances); err != nil {
		// 	return err
		// }
		// Calculate damage IDs to delete
		// existingDamageIDs := make(map[uint]bool)
		// for _, d := range existingCar.Damages {
		// 	existingDamageIDs[d.ID] = true
		// }

		// newDamageIDs := make(map[uint]bool)
		// for _, d := range c.Damages {
		// 	if d.ID != 0 {
		// 		newDamageIDs[d.ID] = true
		// 	}
		// }

		// // Find IDs to delete
		// var toDelete []uint
		// for id := range existingDamageIDs {
		// 	if !newDamageIDs[id] {
		// 		toDelete = append(toDelete, id)
		// 	}
		// }

		// // Batch delete orphaned damages
		// if len(toDelete) > 0 {
		// 	if err := tx.Where("id IN ?", toDelete).Delete(&Damage{}).Error; err != nil {
		// 		return err
		// 	}
		// }
		// if len(c.Insurances) > 0 {
		// 	logger.Info.Printf("updating insurances: %#v", c.Insurances)
		// 	if err := tx.Model(&existingCar).Association("Insurances").Replace(c.Insurances); err != nil {
		// 		return err
		// 	}
		// }

		// // Upsert new damages
		// for _, damage := range c.Damages {
		// 	// Process relationships
		// 	if damage.Opponent != nil {
		// 		if err := tx.Save(damage.Opponent).Error; err != nil {
		// 			return err
		// 		}
		// 		damage.OpponentID = damage.Opponent.ID
		// 	}

		// 	if damage.Insurance != nil {
		// 		if err := tx.Save(damage.Insurance).Error; err != nil {
		// 			return err
		// 		}
		// 		damage.InsuranceID = damage.Insurance.ID
		// 	}

		// 	// Create or update damage
		// 	if err := tx.Save(damage).Error; err != nil {
		// 		return err
		// 	}
		// }

		// // Update associations
		// if err := tx.Model(&existingCar).Association("Damages").Replace(c.Damages); err != nil {
		// 	return err
		// }
		return tx.
			Preload(clause.Associations).
			Preload("Damages").
			Preload("Insurances").
			First(c, c.ID).Error
	})

}

func (c *Car) Delete(db *gorm.DB) error {
	return db.Select(clause.Associations).Delete(&c).Error
}

func GetAllCars(db *gorm.DB) ([]Car, error) {
	var cars []Car
	if err := db.
		Preload(clause.Associations).
		Preload("Damages").
		Preload("Insurances").
		Find(&cars).Error; err != nil {
		return nil, err
	}
	return cars, nil
}

func (c *Car) FromID(db *gorm.DB, id uint) error {
	var car Car
	if err := db.
		Preload(clause.Associations).
		Preload("Damages").
		Preload("Insurances").
		First(&car, id).Error; err != nil {
		return err
	}
	*c = car
	return nil
}