// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import FlutterMacOS
import Foundation

public class PathProviderPlugin: NSObject, FlutterPlugin {
  public static func register(with registrar: FlutterPluginRegistrar) {
    let channel = FlutterMethodChannel(
      name: "plugins.flutter.io/path_provider",
      binaryMessenger: registrar.messenger)
    let instance = PathProviderPlugin()
    registrar.addMethodCallDelegate(instance, channel: channel)
  }

  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
    switch call.method {
    case "getTemporaryDirectory":
      result(getDirectory(ofType: FileManager.SearchPathDirectory.cachesDirectory))
    case "getApplicationDocumentsDirectory":
      result(getDirectory(ofType: FileManager.SearchPathDirectory.documentDirectory))
    case "getApplicationSupportDirectory":
      var path = getDirectory(ofType: FileManager.SearchPathDirectory.applicationSupportDirectory)
      if let basePath = path {
        let basePathURL = URL.init(fileURLWithPath: basePath)
        path = basePathURL.appendingPathComponent(Bundle.main.bundleIdentifier!).path
        do {
          try FileManager.default.createDirectory(atPath: path!, withIntermediateDirectories: true)
        } catch {
          result(
            FlutterError(
              code: "directory_creation_failure",
              message: error.localizedDescription,
              details: "\(error)"))
          return
        }
      }
      result(path)
    case "getLibraryDirectory":
      result(getDirectory(ofType: FileManager.SearchPathDirectory.libraryDirectory))
    case "getDownloadsDirectory":
      result(getDirectory(ofType: FileManager.SearchPathDirectory.downloadsDirectory))
    default:
      result(FlutterMethodNotImplemented)
    }
  }
}

/// Returns the user-domain director of the given type.
private func getDirectory(ofType directory: FileManager.SearchPathDirectory) -> String? {
  let paths = NSSearchPathForDirectoriesInDomains(
    directory,
    FileManager.SearchPathDomainMask.userDomainMask,
    true)
  return paths.first
}