import Foundation


protocol ConfigureActionProtocol {
  var action: String { get }
  var fps: Int? { get }
  var outputs: OutputFormatSetting? { get }
  var backend: URL? { get }
  var backendOutput: OutputFormatSetting? { get }
  var keepLocalFiles: Bool? { get }
}

protocol RecordActionProtocol {
  var action: String { get }
  
  var x: Int? { get }
  var y: Int? { get }
  var width: Int? { get }
  var height: Int? { get }
  var preventResize: Bool? { get }
  var preventMove: Bool? { get }
  var fps: Int? { get }
  var backend: URL? { get }
  var outputs: OutputFormatSetting? { get }
  var backendOutput: OutputFormatSetting? { get }
  var keepLocalFiles: Bool? { get }
  var autoStart: Bool? { get }
}

// The concrete implementations
struct ConfigureAction: ConfigureActionProtocol {
  let action: String
  var fps: Int?
  var outputs: OutputFormatSetting?
  var backend: URL?
  var backendOutput: OutputFormatSetting?
  var keepLocalFiles: Bool?
}

struct RecordAction: RecordActionProtocol {
  let action: String
  var x: Int?
  var y: Int?
  var width: Int?
  var height: Int?
  var preventResize: Bool?
  var preventMove: Bool?
  var fps: Int?
  var outputs: OutputFormatSetting?
  var backend: URL?
  var backendOutput: OutputFormatSetting?
  var keepLocalFiles: Bool?
  var autoStart: Bool?
}

enum CapturaAction {
    case record(RecordAction)
    case configure(ConfigureAction)
}

struct CapturaURLDecoder {
  
  static func decodeParams(url: URL) -> CapturaAction? {
      guard let components = URLComponents(url: url, resolvingAgainstBaseURL: false),
            let params = components.queryItems else {
          return nil
      }

      var paramsDict = [String: Any]()

      params.forEach { item in
          paramsDict[item.name] = item.value
      }

      guard let action = paramsDict["action"] as? String else {
          return nil
      }

      switch action {
      case "configure":
        var fps = Int(paramsDict["fps"] as? String ?? "")
        let backend = URL(string: paramsDict["backend"] as? String ?? "")
        let keepLocalFiles = Bool(paramsDict["keep_local_files"] as? String ?? "")
        let outputs = OutputFormatSetting(paramsDict["outputs"] as? String ?? "")
        var backendOutput = OutputFormatSetting(paramsDict["backend_output"] as? String ?? "")
        
        if fps != nil {
          fps = min(10, max(4, fps!))
        }
        
        if backendOutput == .all {
          backendOutput = .gifOnly
        }
        
        return .configure(ConfigureAction(
          action: action,
          fps: fps,
          outputs: outputs,
          backend: backend,
          backendOutput: backendOutput,
          keepLocalFiles: keepLocalFiles
        ))

      case "record":
        let x = Int(paramsDict["x"] as? String ?? "")
        let y = Int(paramsDict["y"] as? String ?? "")
        let width = Int(paramsDict["width"] as? String ?? "")
        let height = Int(paramsDict["height"] as? String ?? "")
        let preventResize = Bool(paramsDict["prevent_resize"] as? String ?? "")
        let preventMove = Bool(paramsDict["prevent_move"] as? String ?? "")
        var fps = Int(paramsDict["fps"] as? String ?? "")
        let backend = URL(string: paramsDict["backend"] as? String ?? "")
        let keepLocalFiles = Bool(paramsDict["keep_local_files"] as? String ?? "")
        let outputs = OutputFormatSetting(paramsDict["outputs"] as? String ?? "")
        var backendOutput = OutputFormatSetting(paramsDict["backend_output"] as? String ?? "")
        
        if fps != nil {
          fps = min(10, max(4, fps!))
        }
        
        if backendOutput == .all {
          backendOutput = .gifOnly
        }
        
        return .record(RecordAction(
          action: action,
          x: x,
          y: y,
          width: width,
          height: height,
          preventResize: preventResize,
          preventMove: preventMove,
          fps: fps,
          outputs: outputs,
          backend: backend,
          backendOutput: backendOutput,
          keepLocalFiles: keepLocalFiles
        ))

      default:
          return nil
      }
  }
}