//
//  NCUtilityFileSystem.swift
//  Nextcloud
//
//  Created by Marino Faggiana on 28/05/2020.
//  Copyright © 2020 Marino Faggiana. All rights reserved.
//
//  Author Marino Faggiana <marino.faggiana@nextcloud.com>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

import Foundation
import PhotosUI

class NCUtilityFileSystem: NSObject {
    @objc static let shared: NCUtilityFileSystem = {
        let instance = NCUtilityFileSystem()
        return instance
    }()
    
    let fileManager = FileManager.default
    
    @objc func getFileSize(asset: PHAsset) -> Int64 {
        
        let resources = PHAssetResource.assetResources(for: asset)
        
        if let resource = resources.first {
            if resource.responds(to: #selector(NSDictionary.fileSize)) {
                let unsignedInt64 = resource.value(forKey: "fileSize") as! CLong
                return Int64(bitPattern: UInt64(unsignedInt64))
            }
        }
        
        return 0
    }
    
    @objc func getFileSize(filePath: String) -> Double {
        
        do {
            let attributes = try fileManager.attributesOfItem(atPath: filePath)
            return attributes[FileAttributeKey.size] as? Double ?? 0
        } catch { }
        return 0
    }
    
    @objc func getFileModificationDate(filePath: String) -> NSDate? {
        
        do {
            let attributes = try fileManager.attributesOfItem(atPath: filePath)
            return attributes[FileAttributeKey.modificationDate] as? NSDate
        } catch { }
        return nil
    }
    
    @objc func getFileCreationDate(filePath: String) -> NSDate? {
        
        do {
            let attributes = try fileManager.attributesOfItem(atPath: filePath)
            return attributes[FileAttributeKey.creationDate] as? NSDate
        } catch { }
        return nil
    }
    
    @objc func writeFile(fileURL: URL, text: String) -> Bool {
        
        do {
            try FileManager.default.removeItem(at: fileURL)
        }
        catch {}
        
        do {
            try text.write(to: fileURL, atomically: true, encoding: .utf8)
            return true
        }
        catch {
            return false
        }
    }
    
    @objc func deleteFile(filePath: String) {
        
        do {
            try FileManager.default.removeItem(atPath: filePath)
        }
        catch {}
    }
    
    @objc func moveFileInBackground(atPath: String, toPath: String) {
        
        DispatchQueue.global().async {
            do {
                try FileManager.default.removeItem(atPath: toPath)
                try FileManager.default.copyItem(atPath: atPath, toPath: toPath)
                try FileManager.default.removeItem(atPath: atPath)
            }
            catch {}
        }
    }
}