import 'dart:io';
import 'dart:math';

import 'package:camera/camera.dart';
import 'package:douyin_demo/providers/CameraProvider.dart';
import 'package:firebase_ml_vision/firebase_ml_vision.dart';
import 'package:flutter/material.dart';
// import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'package:provider/provider.dart';

class CameraPage extends StatelessWidget {
  const CameraPage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Theme.of(context).primaryColor,
      body: CameraMain(
        rpx: MediaQuery.of(context).size.width / 750,
      ),
      bottomNavigationBar: BottomAppBar(),
    );
  }
}

class CameraMain extends StatefulWidget {
  CameraMain({Key? key, required this.rpx}) : super(key: key);
  final double rpx;

  @override
  _CameraMainState createState() => _CameraMainState();
}

class _CameraMainState extends State<CameraMain> {
  late CameraProvider provider;
  double rpx = 0;
  double toTop = 0;
  double outBox = 0;
  double innerBox = 0;
 late CameraController _controller;
  bool findFace = false;
  var cameras;

  @override
  void initState() {
    super.initState();

    // provider = Provider.of<CameraProvider>(context);
    // getCameras();
    rpx = widget.rpx;
    toTop = 100 * rpx;
    outBox = 170 * rpx;
    innerBox = 130 * rpx;
  }

  getCameras() async {
    cameras = await availableCameras();
    _controller = CameraController(cameras[1], ResolutionPreset.medium);

    _controller.initialize().then((_) {
      if (!mounted) {
        return;
      }
      _controller.startImageStream((CameraImage availableImage) {
        _controller.stopImageStream();
        _scanFrame(availableImage);
      });

      setState(() {});
    });
  }

  void _scanFrame(CameraImage availableImage) async {
    final FirebaseVisionImageMetadata metadata = FirebaseVisionImageMetadata(
        rawFormat: availableImage.format.raw,
        size: Size(
            availableImage.width.toDouble(), availableImage.height.toDouble()),
        planeData: availableImage.planes
            .map((currentPlane) => FirebaseVisionImagePlaneMetadata(
                bytesPerRow: currentPlane.bytesPerRow,
                height: currentPlane.height,
                width: currentPlane.width))
            .toList(),
        rotation: ImageRotation.rotation90);
    final FirebaseVisionImage visionImage =
        FirebaseVisionImage.fromBytes(availableImage.planes[0].bytes, metadata);
    final FaceDetector detector = FirebaseVision.instance.faceDetector();
    final List<Face> faces = await detector.processImage(visionImage);

    if (faces.length > 0) {
      setState(() {
        findFace = true;
        _controller.startImageStream((CameraImage availableImage) {
          _controller.stopImageStream();
          _scanFrame(availableImage);
        });
      });
    } else {
      setState(() {
        findFace = false;
        _controller.startImageStream((CameraImage availableImage) {
          _controller.stopImageStream();
          _scanFrame(availableImage);
        });
      });
    }

    // for (TextBlock block in visionText.blocks) {

    //   // final Rectangle<int> boundingBox = block.boundingBox;
    //   // final List<Point<int>> cornerPoints = block.cornerPoints;
    //   print(block.text);
    //   final List<RecognizedLanguage> languages = block.recognizedLanguages;

    //   for (TextLine line in block.lines) {
    //     // Same getters as TextBlock
    //     print(line.text);
    //     for (TextElement element in line.elements) {
    //       // Same getters as TextBlock
    //       print(element.text);
    //     }
    //   }
    // }
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    provider = Provider.of<CameraProvider>(context);
    _controller = provider.cameraController;
    if (_controller == null) {
      return Container(
        child: Center(child: CircularProgressIndicator()),
      );
    }

    bool ifMakeVideo = provider.ifMakeVideo;
    if (_controller.value == null) {
      return Container(
        child: Center(child: CircularProgressIndicator()),
      );
    }
    final size = MediaQuery.of(context).size;
    return _controller.value.isInitialized
        ? Stack(children: [
            // Camera.open(cameraId),
            findFace
                ? Positioned(
                    top: 0,
                    left: 0,
                    child: Container(
                      width: 100,
                      height: 100,
                      color: Colors.red,
                    ))
                : Container(),
            ClipRect(
                child: Transform.scale(
              scale: _controller.value.aspectRatio / size.aspectRatio,
              child: Center(
                child: AspectRatio(
                  aspectRatio: _controller.value.aspectRatio,
                  child: CameraPreview(_controller),
                ),
              ),
            )),
            Positioned(
              //顶部关闭按钮
              top: toTop,
              left: 30 * rpx,
              child: IconButton(
                icon: Icon(
                  Icons.close,
                  color: Colors.white,
                  size: 60 * rpx,
                ),
                onPressed: () {
                  Navigator.pop(context);
                },
              ),
            ),
            Positioned(
              //选择音乐
              top: toTop,
              left: 250 * rpx,
              child: Container(
                width: 250 * rpx,
                child: TextButton(
                  onPressed: () {},
                  child: Row(
                    children: [
                      Icon(
                        Icons.music_note,
                        color: Colors.white,
                      ),
                      SizedBox(
                        width: 10 * rpx,
                      ),
                      Text(
                        "选择音乐",
                        style: TextStyle(color: Colors.white),
                      ),
                    ],
                  ),
                ),
              ),
            ),
            Positioned(
              //拍照按钮
              bottom: 140 * rpx,
              // left: (750*rpx-outBox)/2,
              child: Container(
                  width: 750 * rpx,
                  child: Row(
                      mainAxisAlignment: MainAxisAlignment.spaceAround,
                      children: [
                        ifMakeVideo
                            ? Container(
                                width: 80 * rpx,
                              )
                            : IconWithText(
                                icon: Icon(
                                  Icons.search,
                                  color: Colors.white,
                                ),
                                text: "道具"),
                        ifMakeVideo
                            ? AnimVideoButton(
                                rpx: rpx,
                                outWidth: outBox,
                                innerWidth: innerBox - 30 * rpx,
                                provider: provider,
                              )
                            : CircleTakePhoto(
                                outBox: outBox,
                                innerBox: innerBox,
                              ),
                        ifMakeVideo
                            ? IconButton(
                                padding: EdgeInsets.all(0),
                                icon: Icon(
                                  Icons.check_circle,
                                  color: Color.fromARGB(255, 219, 48, 85),
                                  size: 80 * rpx,
                                ),
                                onPressed: () async {
                                  provider.cameraController
                                      .stopVideoRecording();
                                  // await ImageGallerySaver.saveFile(
                                  //     provider.fileName);
                                  File(provider.fileName).delete();
                                },
                              )
                            : IconWithText(
                                icon: Icon(
                                  Icons.search,
                                  color: Colors.white,
                                ),
                                text: "道具"),
                      ])),
            ),
            Positioned(
              bottom: 40 * rpx,
              child: ScrollBottomBar(
                rpx: rpx,
              ),
            ),
            Positioned(
              right: 30 * rpx,
              top: 80 * rpx,
              child: IconButton(
                  icon: Icon(Icons.camera_front),
                  onPressed: () {
                    provider.changeCamera();
                  }),
            )
          ])
        : Container();
  }
}

class AnimVideoButton extends StatefulWidget {
  AnimVideoButton(
      {Key? key,
      required this.outWidth,
      required this.innerWidth,
      required this.rpx,
      required this.provider})
      : super(key: key);
  final double outWidth;
  final double innerWidth;
  final double rpx;
  final CameraProvider provider;

  _AnimVideoButtonState createState() => _AnimVideoButtonState();
}

class _AnimVideoButtonState extends State<AnimVideoButton>
    with TickerProviderStateMixin {
 late Animation<double> animation;
 late AnimationController controller;
  double outWidth = 0;
  double innerWidth = 0;
  double outBorder = 0;
  double rpx = 0;
  double maxBorder = 0;
  bool ifRecording = false;
 late CameraProvider provider;
  double curBorder = 0;

  @override
  void dispose() {
    controller.dispose();
    super.dispose();
  }

  @override
  void initState() {
    super.initState();
    ifRecording = true;
    provider = widget.provider;
    outWidth = widget.outWidth;
    innerWidth = widget.innerWidth;
    rpx = widget.rpx;
    outBorder = 5 * rpx;
    maxBorder = (outWidth - innerWidth) / 2 - 10 * rpx;
    curBorder = outBorder;
    controller =
        AnimationController(duration: Duration(milliseconds: 500), vsync: this);
    animation =
        Tween<double>(begin: outBorder, end: maxBorder).animate(controller)
          ..addListener(() {
            setState(() {
              curBorder = animation.value;
            });
          });
    controller.repeat(reverse: true);
  }

  pauseRecording() {
    // provider.cameraController.pauseVideoRecording();
    controller.stop();
    provider.cameraController.pauseVideoRecording();
    setState(() {
      ifRecording = false;
    });
  }

  resumeRecording() {
    // provider.cameraController.resumeVideoRecording();
    controller.repeat(reverse: true);
    provider.cameraController.resumeVideoRecording();
    setState(() {
      ifRecording = true;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      width: outWidth,
      height: outWidth,
      decoration: BoxDecoration(
          shape: BoxShape.circle,
          color: Colors.transparent,
          border: Border.all(
              width: curBorder, color: Color.fromARGB(128, 219, 48, 85))),
      child: Container(
        child: !ifRecording
            ? IconButton(
                padding: EdgeInsets.all(0),
                icon: Icon(
                  Icons.play_arrow,
                  size: innerWidth,
                  color: Color.fromARGB(255, 219, 48, 85),
                ),
                onPressed: () {
                  resumeRecording();
                },
              )
            : IconButton(
                padding: EdgeInsets.all(0),
                icon: Icon(
                  Icons.pause,
                  size: innerWidth,
                  color: Color.fromARGB(255, 219, 48, 85),
                ),
                onPressed: () {
                  pauseRecording();
                },
              ),
      ),
    );
  }
}

class ScrollBottomBar extends StatefulWidget {
  ScrollBottomBar({Key? key, required this.rpx}) : super(key: key);
  final double rpx;

  _ScrollBottomBarState createState() => _ScrollBottomBarState();
}

class _ScrollBottomBarState extends State<ScrollBottomBar> {
  double rpx=0;
  double eachWidth = 0;
  double eachSide = 0;
  List<String> items=[];
  late ScrollController controller;
  double startX = 0;
  double finalX = 0;
  double minValue = 0;
  double maxValue = 0;
  double curX = 0;
  int curIndex = 0;

  @override
  void initState() {
    super.initState();
    rpx = widget.rpx;
    eachWidth = 130 * rpx;
    eachSide = (750 - eachWidth / rpx) / 2 * rpx;
    curIndex = 2;
    minValue = 0;

    items = [
      '拍照',
      '拍15秒',
      '拍60秒',
      '影集',
      '开直播',
    ];
    maxValue = (items.length - 1) * eachWidth;
    curX = curIndex * eachWidth;
    controller = ScrollController(initialScrollOffset: curX);
  }

  moveToItem(index) {
    curX = index * eachWidth;
    controller.animateTo(curX,
        duration: Duration(milliseconds: 200), curve: Curves.linear);
    setState(() {
      curX = curX;
      curIndex = index;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(children: [
      Listener(
        onPointerDown: (result) {
          setState(() {
            startX = result.position.dx;
          });
        },
        onPointerMove: (result) {
          double moveValue = result.position.dx;
          double moved = startX - moveValue;
          // curX+moved
          double afterMoved = min(max(curX + moved, minValue), maxValue);
          setState(() {
            curX = afterMoved;
            startX = result.position.dx;
          });
        },
        onPointerUp: (result) {
          int index = 0;
          double finalPosition = curX - eachWidth / 2;
          index = (finalPosition / eachWidth).ceil();
          moveToItem(index);
        },
        child: Container(
            width: 750 * rpx,
            height: 100 * rpx,
            child: SingleChildScrollView(
              scrollDirection: Axis.horizontal,
              controller: controller,
              child: Container(
                child: Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    SizedBox(
                      width: eachSide,
                    ),
                    Row(
                        children: List.generate(items.length, (index) {
                      return Container(
                        width: eachWidth,
                        child: TextButton(
                          child: Text(
                            items[index],
                            style: TextStyle(
                                color: curIndex == index
                                    ? Colors.white
                                    : Colors.white.withOpacity(0.5)),
                          ),
                          style: ButtonStyle(
                              padding:
                                  MaterialStateProperty.all(EdgeInsets.zero)),
                          onPressed: () {
                            moveToItem(index);
                          },
                        ),
                      );
                    })),
                    SizedBox(
                      width: eachSide,
                    ),
                  ],
                ),
              ),
            )),
      ),
      Center(
        child: Container(
          decoration:
              BoxDecoration(shape: BoxShape.circle, color: Colors.white),
          width: 8 * rpx,
          height: 8 * rpx,
        ),
      )
    ]);
  }
}

class CircleTakePhoto extends StatelessWidget {
  const CircleTakePhoto(
      {Key? key, required this.outBox, required this.innerBox})
      : super(key: key);
  final double outBox;
  final double innerBox;

  @override
  Widget build(BuildContext context) {
    double rpx = MediaQuery.of(context).size.width / 750;
    CameraProvider provider = Provider.of<CameraProvider>(context);

    // double outBox=160*rpx;
    // double innerBox=130*rpx;
    return Container(
      width: outBox,
      height: outBox,
      padding: EdgeInsets.all(10 * rpx),
      decoration: BoxDecoration(
        color: Colors.transparent,
        borderRadius: BorderRadius.circular(90 * rpx),
        border: Border.all(
            width: 10 * rpx, color: Color.fromARGB(128, 219, 48, 85)),
      ),
      child: TextButton(
          style:
              ButtonStyle(padding: MaterialStateProperty.all(EdgeInsets.zero)),
          onPressed: () async {
            // provider.changeFileName('png');
            // print(provider.fileName);
            // await provider.cameraController
            //     .takePicture(provider.fileName)
            //     .then((_) {
            //   // Navigator.push(context, MaterialPageRoute(fullscreenDialog: true,builder: (_){
            //   //   return Image.file(File(provider.fileName) );
            //   // }));
            //   ImagePickerSaver.saveFile(
            //       fileData: File(provider.fileName).readAsBytesSync());
            // });
            provider.changeFileName('mp4');
            provider.cameraController.startVideoRecording(provider.fileName);
            // provider.cameraController.startVideoRecording();
            provider.changePhotoWidget();
          },
          child: Container(
            width: innerBox,
            height: innerBox,
            alignment: Alignment.center,
            decoration: BoxDecoration(
                color: Color.fromARGB(255, 219, 48, 85),
                borderRadius: BorderRadius.circular(75 * rpx)),
          )),
    );
  }
}

class IconWithText extends StatelessWidget {
  const IconWithText({Key? key, required this.icon, required this.text})
      : super(key: key);
  final Icon icon;
  final String text;

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        icon,
        Text(
          text,
          style: TextStyle(color: Colors.white),
        )
      ],
    );
  }
}