package models

import (
	"time"
)

// TransactionImage represents an image attachment for a transaction
// Feature: accounting-feature-upgrade
// Validates: Requirements 4.1-4.8
type TransactionImage struct {
	ID            uint      `gorm:"primarykey" json:"id"`
	TransactionID uint      `gorm:"not null;index" json:"transaction_id"`
	FilePath      string    `gorm:"size:255;not null" json:"file_path"`
	FileName      string    `gorm:"size:100" json:"file_name"`
	FileSize      int64     `json:"file_size"`
	MimeType      string    `gorm:"size:50" json:"mime_type"`
	CreatedAt     time.Time `json:"created_at"`

	// Relationships
	Transaction Transaction `gorm:"foreignKey:TransactionID" json:"-"`
}

// TableName specifies the table name for TransactionImage
func (TransactionImage) TableName() string {
	return "transaction_images"
}

// Image attachment constraints
const (
	// MaxImagesPerTransaction limits the number of images per transaction
	// Validates: Requirements 4.9
	MaxImagesPerTransaction = 9

	// MaxImageSizeBytes limits the size of each image to 10MB
	// Validates: Requirements 4.10
	MaxImageSizeBytes = 10 * 1024 * 1024 // 10MB

	// AllowedImageTypes specifies the supported image formats
	// Validates: Requirements 4.11
	AllowedImageTypes = "image/jpeg,image/png,image/heic"
)