//
//  BackupDocument.swift
//  OTP
//
//  Created by Shadowfacts on 8/23/21.
//

import SwiftUI
import UniformTypeIdentifiers
import OTPKit

struct BackupDocument: FileDocument {
    
    private static let encoder = PropertyListEncoder()
    private static let decoder = PropertyListDecoder()
    
    static var readableContentTypes: [UTType] { [.propertyList] }
    
    private(set) var data: KeyData
    
    init(data: KeyData) {
        self.data = data
    }
    
    init(configuration: ReadConfiguration) throws {
        if let data = configuration.file.regularFileContents {
            let store = try BackupDocument.decoder.decode(KeyData.self, from: data)
            self.data = store
        } else {
            self.data = KeyData()
        }
    }
    
    init(url: URL) throws {
        let data = try Data(contentsOf: url)
        let store = try BackupDocument.decoder.decode(KeyData.self, from: data)
        self.data = store
    }
    
    func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper {
        let data = try! BackupDocument.encoder.encode(data)
        return FileWrapper(regularFileWithContents: data)
    }
    
}