package entities

import (
	"database/sql/driver"
	"encoding/json"
	"errors"
	"time"

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

type Metadata map[string]interface{}

func (m Metadata) Value() (driver.Value, error) {
	return json.Marshal(m)
}

func (m *Metadata) Scan(value interface{}) error {
	if value == nil {
		*m = make(Metadata)
		return nil
	}

	bytes, ok := value.([]byte)
	if !ok {
		return errors.New("type assertion to []byte failed")
	}

	return json.Unmarshal(bytes, m)
}

type Category struct {
	ID             uuid.UUID `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
	OrganizationID uuid.UUID `gorm:"type:uuid;not null;index" json:"organization_id" validate:"required"`
	Name           string    `gorm:"not null;size:255" json:"name" validate:"required,min=1,max=255"`
	Description    *string   `gorm:"type:text" json:"description"`
	BusinessType   string    `gorm:"size:50;default:'restaurant'" json:"business_type"`
	Metadata       Metadata  `gorm:"type:jsonb;default:'{}'" json:"metadata"`
	CreatedAt      time.Time `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt      time.Time `gorm:"autoUpdateTime" json:"updated_at"`

	Organization Organization `gorm:"foreignKey:OrganizationID" json:"organization,omitempty"`
	Products     []Product    `gorm:"foreignKey:CategoryID" json:"products,omitempty"`
}

func (c *Category) BeforeCreate(tx *gorm.DB) error {
	if c.ID == uuid.Nil {
		c.ID = uuid.New()
	}
	return nil
}

func (Category) TableName() string {
	return "categories"
}