dependencies: [
    .package(name: "Filestack", url: "https://github.com/filestack/filestack-ios.git", .upToNextMajor(from: "2.8.5"))
]

import Filestack
import FilestackSDK

// Initialize a `Policy` with the expiry time and permissions you need.
let oneDayInSeconds: TimeInterval = 60 * 60 * 24 // expires tomorrow
let policy = Policy(// Set your expiry time (24 hours in our case)
                    expiry: Date(timeIntervalSinceNow: oneDayInSeconds),
                    // Set the permissions you want your policy to have
                    call: [.pick, .read, .store])

// Initialize a `Security` object by providing a `Policy` object and your app secret.
// You can find and/or enable your app secret in the Developer Portal.
guard let security = try? Security(policy: policy, appSecret: "YOUR-APP-SECRET") else {
    return
}

// Create `Config` object.
let config = Filestack.Config()

// Make sure to assign a callback URL scheme that is handled by your app.
config.callbackURLScheme = "filestackdemo"

let client = Filestack.Client(apiKey: "YOUR-API-KEY", security: security, config: config)

let localURL = URL(string: "file:///an-app-sandbox-friendly-local-url")!

let uploader = client.upload(using: localURL, uploadProgress: { (progress) in
    // Here you may update the UI to reflect the upload progress.
    print("progress = \(String(describing: progress))")
}) { (response) in
    // Try to obtain Filestack handle
    if let json = response?.json, let handle = json["handle"] as? String {
        // Use Filestack handle
    } else if let error = response?.error {
        // Handle error
    }
}

// The view controller that will be presenting the image picker.
let presentingViewController = self

// The source type (e.g. `.camera`, `.photoLibrary`, or `.documents`)
let sourceType: LocalSource = .camera

// Upload options for any uploaded files.
let uploadOptions: UploadOptions = .defaults

// Store options for any uploaded files.
uploadOptions.storeOptions = StorageOptions(location: .s3, access: .public)

let behavior = .uploadAndStore(uploadOptions: uploadOptions)

let uploader = client.pickFiles(using: presentingViewController,
                                source: sourceType,
                                behavior: behavior,
                                pickCompletionHandler: { (urls) in
    // Copy, move, or access the contents of the returned files at this point while they are still available.
    // Once this closure call returns, all the files will be automatically removed.
}) { (responses) in
    for response in responses {
        // Try to obtain Filestack handle
        if let json = response?.json, let handle = json["handle"] as? String {
            // Use Filestack handle
        } else if let error = response?.error {
            // Handle error
        }
    }
}

// OPTIONAL: Monitor upload progress.
let uploadObserver = uploader.progress.observe(\.fractionCompleted, options: [.new]) { (progress, change) in
    // TODO: Use `progress` or `change` objects.
})

uploader.cancel()

client.folderList(provider: .googleDrive, path: "/", pageToken: nil) { response in
    if let error = response.error {
        // Handle error
        return
    }

    if let contents = response.contents {
        // Contents received — do something with them.
        print("Received \(contents.count) entries.")
    }

    if let nextToken = response.nextToken {
    	 // More contents are available — to retrieve next page, pass this `nextToken` as a parameter in the `folderList` function.
    } else {
    	 // No more contents available — we are done.
    }
}

// Store options for your uploaded files.
// Here we are saying our storage location is S3 and access for uploaded files should be public.
let storeOptions = StorageOptions(location: .s3, access: .public)

client.store(provider: .googleDrive, path: "/some-large-image.jpg", storeOptions: storeOptions) { (response) in
    if let error = response.error {
        // Handle error
        return
    }

    if let contents = response.contents {
        // Contents received describing the request's result.
    }
}

// In case your Filestack account has security enabled, you will need to instantiate a `Security` object.
// We can do this by either configuring a `Policy` and instantiating a `Security` object by passing
// the `Policy` and an `appSecret`, or by instantiating a `Security` object directly by passing an already
// encoded policy together with its corresponding signature — in this example, we will use the 1st method.

// Create `Policy` object with an expiry time and call permissions.
let policy = Policy(expiry: .distantFuture,
                    call: [.pick, .read, .stat, .write, .writeURL, .store, .convert, .remove, .exif])

// Create `Security` object based on our previously created `Policy` object and app secret obtained from
// https://dev.filestack.com/.
guard let security = try? Security(policy: policy, appSecret: "YOUR-APP-SECRET-HERE") else {
    fatalError("Unable to instantiate Security object.")
}

// Create `Config` object.
// IMPORTANT: - Make sure to assign an app scheme URL that matches the one(s) configured in your info.plist
let config = Filestack.Config.builder
  .with(callbackURLScheme: "YOUR-APP-URL-SCHEME")
  .with(videoQuality: .typeHigh)
  .with(imageURLExportPreset: .current)
  .with(maximumSelectionLimit: 10)
  .withEditorEnabled()
  .with(availableCloudSources: [.dropbox, .googledrive, .googlephotos, .customSource])
  .with(availableLocalSources: [.camera])
  .build()

// Instantiate the Filestack `Client` by passing an API key obtained from https://dev.filestack.com/,
// together with a `Security` and `Config` object.
// If your account does not have security enabled, then you can omit this parameter or set it to `nil`.
let client = Filestack.Client(apiKey: "YOUR-API-KEY-HERE", security: security, config: config)

// Store options for your uploaded files.
// Here we are saying our storage location is S3 and access for uploaded files should be public.
let storeOptions = StorageOptions(location: .s3, access: .public)

// Instantiate picker by passing the `StorageOptions` object we just set up.
let picker = client.picker(storeOptions: storeOptions)

/// After finishing picking, local files are uploaded and cloud files are stored at the store destination.
picker.behavior = .uploadAndStore(uploadOptions: .defaults)

/// After finishing picking, only cloud files are stored at the store destination.
picker.behavior = .storeOnly

// Optional. Set the picker's delegate.
picker.pickerDelegate = self

extension ViewController: PickerNavigationControllerDelegate {
    /// Called when the picker finishes picking files originating from the local device.
    func pickerPickedFiles(picker: PickerNavigationController, fileURLs: [URL]) {
        switch picker.behavior {
        case .storeOnly:
            // IMPORTANT: Copy, move, or access the contents of the returned files at this point while they are still available.
            // Once this delegate function call returns, all the files will be automatically removed.

            // Dismiss the picker since we have finished picking files from the local device, and, in `storeOnly` mode,
            // there's no upload phase.
            DispatchQueue.main.async {
                picker.dismiss(animated: true) {
                    self.presentAlert(titled: "Success", message: "Finished picking files: \(fileURLs)")
                }
            }
        case let .uploadAndStore(uploadOptions):
            // TODO: Handle this case.
            break
        default:
            break
        }
    }

    /// Called when the picker finishes storing a file originating from a cloud source into the destination storage location.
    func pickerStoredFile(picker: PickerNavigationController, response: StoreResponse) {
        if let contents = response.contents {
            // Our cloud file was stored into the destination location.
            print("Stored file response: \(contents)")
        } else if let error = response.error {
            // The store operation failed.
            print("Error storing file: \(error)")
        }
    }

    /// Called when the picker finishes uploading a file originating from the local device into the destination storage location.
    func pickerUploadedFile(picker: PickerNavigationController, response: JSONResponse?) {
        if let contents = response?.json {
            // Our local file was stored into the destination location.
            print("Uploaded file response: \(contents)")
        } else if let error = response?.error {
            // The upload operation failed.
            print("Error uploading file: \(error)")
        }
    }

    /// Called when the picker reports progress during a file or set of files being uploaded.
    func pickerReportedUploadProgress(picker: PickerNavigationController, progress: Float) {
        print("Picker \(picker) reported upload progress: \(progress)")
    }
}

yourViewController.present(picker, animated: true)

// Set `UploadService.shared.useBackgroundSession` to true to allow uploads in the background.
FilestackSDK.UploadService.shared.useBackgroundSession = true