//
//  DroneVideoView.swift
//  ReactNativeDjiMobile
//
//  Created by Adam Rosendorff on 2019/02/14.
//

import Foundation
import DJISDK

class DroneVideoView: UIView, RCTInvalidating {

  var videoFeedView: UIView!
  var videoPreviewer: DJIVideoPreviewer!
  var currentVideoFeedViewBounds: CGRect!

  public override init(frame: CGRect) {
    super.init(frame: frame)
    //    let screenSize: CGRect = UIScreen.main.bounds

    self.videoFeedView = UIView()
    self.addSubview(self.videoFeedView)

    self.videoFeedView.autoresizingMask = [.flexibleWidth, .flexibleHeight]

    self.currentVideoFeedViewBounds = self.videoFeedView.bounds

    self.setupVideoPreviewer()
  }


  public required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
  }

  public func invalidate() {
    resetVideoPreviewer()
  }

  func setupVideoPreviewer() {
    self.resetVideoPreviewer()
    //    DJIVideoPreviewer.instance()?.enableHardwareDecode = true
    DJIVideoPreviewer.instance()?.setView(self.videoFeedView)
    DJISDKManager.videoFeeder()?.primaryVideoFeed.add(self, with: nil)
    DJIVideoPreviewer.instance()?.start()
  }

  func resetVideoPreviewer() {
    DJIVideoPreviewer.instance()?.unSetView()
    DJISDKManager.videoFeeder()?.primaryVideoFeed.removeAllListeners()
  }

}

extension DroneVideoView: DJIVideoFeedListener {
  func videoFeed(_ videoFeed: DJIVideoFeed, didUpdateVideoData videoData: Data) {
    if (self.videoFeedView.bounds != self.currentVideoFeedViewBounds) {
      self.currentVideoFeedViewBounds = self.videoFeedView.bounds
      DJIVideoPreviewer.instance()?.setView(self.videoFeedView)
    }
    videoData.withUnsafeBytes { (ptr: UnsafePointer<UInt8>) in
      let p = UnsafeMutablePointer<UInt8>.init(mutating: ptr)
      DJIVideoPreviewer.instance()?.push(p, length: Int32(videoData.count))
    }
  }


}