package entities

import (
	"time"

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

type PurchaseCategoryType string

const (
	PurchaseCategoryTypeRawMaterial  PurchaseCategoryType = "raw_material"
	PurchaseCategoryTypeNonInventory PurchaseCategoryType = "non_inventory"
)

type PurchaseCategoryPreset struct {
	ID        uuid.UUID            `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
	ParentID  *uuid.UUID           `gorm:"type:uuid;index" json:"parent_id"`
	Code      string               `gorm:"not null;unique;size:100" json:"code"`
	Name      string               `gorm:"not null;size:255" json:"name"`
	Type      PurchaseCategoryType `gorm:"not null;size:20" json:"type"`
	SortOrder int                  `gorm:"not null;default:0" json:"sort_order"`
	IsActive  bool                 `gorm:"not null;default:true" json:"is_active"`
	CreatedAt time.Time            `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt time.Time            `gorm:"autoUpdateTime" json:"updated_at"`

	Parent *PurchaseCategoryPreset `gorm:"foreignKey:ParentID" json:"parent,omitempty"`
}

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

func (PurchaseCategoryPreset) TableName() string {
	return "purchase_category_presets"
}

type PurchaseCategory 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"`
	PresetID       *uuid.UUID           `gorm:"type:uuid;index" json:"preset_id"`
	ParentID       *uuid.UUID           `gorm:"type:uuid;index" json:"parent_id"`
	Code           string               `gorm:"not null;size:100" json:"code"`
	Name           string               `gorm:"not null;size:255" json:"name"`
	Type           PurchaseCategoryType `gorm:"not null;size:20" json:"type"`
	SortOrder      int                  `gorm:"not null;default:0" json:"sort_order"`
	IsSystem       bool                 `gorm:"not null;default:false" json:"is_system"`
	IsActive       bool                 `gorm:"not null;default:true" json:"is_active"`
	CreatedAt      time.Time            `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt      time.Time            `gorm:"autoUpdateTime" json:"updated_at"`

	Organization *Organization           `gorm:"foreignKey:OrganizationID" json:"organization,omitempty"`
	Preset       *PurchaseCategoryPreset `gorm:"foreignKey:PresetID" json:"preset,omitempty"`
	Parent       *PurchaseCategory       `gorm:"foreignKey:ParentID" json:"parent,omitempty"`
	Children     []PurchaseCategory      `gorm:"foreignKey:ParentID" json:"children,omitempty"`
}

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

func (PurchaseCategory) TableName() string {
	return "purchase_categories"
}