import UIKit
import CloudKit

class CloudManager {

private static let privateCloudDatabase = CKContainer.default().publicCloudDatabase

static func saveDataToCloud(place: Place, with image: UIImage) {

    let (image, url) = prepareImageToSaveToCloud(place: place, image: image)

    guard let imageAsset = image, let imageURL = url else { return }

    let record = CKRecord(recordType: "Place")
    record.setValue(place.name, forKey: "name")
    record.setValue(place.location, forKey: "location")
    record.setValue(place.type, forKey: "type")
    record.setValue(place.rating, forKey: "rating")
    record.setValue(imageAsset, forKey: "imageData")

    privateCloudDatabase.save(record) { (_, error) in
        if let error = error { print(error); return }
        deleteTempImage(imageURL: imageURL)
    }
}

// MARK: Private Methods
private static func prepareImageToSaveToCloud(place: Place, image: UIImage) -> (CKAsset?, URL?) {

    let scale = image.size.width > 1080 ? 1080 / image.size.width : 1
    let scaleImage = UIImage(data: image.pngData()!, scale: scale)
    let imageFilePath = NSTemporaryDirectory() + place.name
    let imageURL = URL(fileURLWithPath: imageFilePath)

    guard let dataToPath = scaleImage?.jpegData(compressionQuality: 1) else { return (nil, nil)}

    do {
        try dataToPath.write(to: imageURL, options: .atomic)
    } catch {
        print(error.localizedDescription)
    }

    let imageAsset = CKAsset(fileURL: imageURL)

    return (imageAsset, imageURL)
}

static private func deleteTempImage(imageURL: URL) {
    do {
        try FileManager.default.removeItem(at: imageURL)
    } catch {
        print(error.localizedDescription)
    }
}