//
//  PHAsset+ImageInfo.swift
//  Demo
//
//  Created by Groot on 2025/4/27.
//

import Foundation
import Photos

// MARK: - PHAsset扩展
extension PHAsset {
    /// 从资产中提取图像信息
    /// - Returns: 图像信息
    func extractAssetInfo() -> ImageItem.ImageInfo? {
        let fileSize = self.getSize()
        
        let imageInfo = ImageItem.ImageInfo(
            time: self.creationDate,
            locationCoordinate: self.location?.coordinate,
            fileSize: fileSize,
            pixelSize: CGSize(width: self.pixelWidth, height: self.pixelHeight)
        )
        return imageInfo
    }
    
    /// 获取资产文件大小
    /// - Returns: 文件大小（字节）
    func getSize() -> Int64? {
        let resources = PHAssetResource.assetResources(for: self)
        
        guard let resource = resources.first,
              let unsignedInt64 = resource.value(forKey: "fileSize") as? CLong else {
            return nil
        }
        
        return Int64(bitPattern: UInt64(unsignedInt64))
    }
}