package models

import "gorm.io/gorm"

// SystemCategory represents system-level categories that cannot be deleted by users
// Feature: accounting-feature-upgrade
// Validates: Requirements 8.19, 8.20
type SystemCategory struct {
	ID       uint   `gorm:"primarykey" json:"id"`
	Code     string `gorm:"size:50;uniqueIndex;not null" json:"code"` // refund, reimbursement
	Name     string `gorm:"size:100;not null" json:"name"`
	Icon     string `gorm:"size:100" json:"icon"`
	Type     string `gorm:"size:20;not null" json:"type"` // income, expense
	IsSystem bool   `gorm:"default:true" json:"is_system"`
}

// TableName specifies the table name for SystemCategory
func (SystemCategory) TableName() string {
	return "system_categories"
}

// InitSystemCategories initializes the system categories (refund and reimbursement)
// This function should be called during application startup or migration
// Feature: accounting-feature-upgrade
// Validates: Requirements 8.19, 8.20
func InitSystemCategories(db *gorm.DB) error {
	categories := []SystemCategory{
		{Code: "refund", Name: "退款", Icon: "mdi:cash-refund", Type: "income", IsSystem: true},
		{Code: "reimbursement", Name: "报销", Icon: "mdi:receipt-text-check", Type: "income", IsSystem: true},
	}

	for _, cat := range categories {
		// Use FirstOrCreate to avoid duplicates
		if err := db.FirstOrCreate(&cat, SystemCategory{Code: cat.Code}).Error; err != nil {
			return err
		}
	}

	return nil
}