import 'dart:io';
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:media_kit/media_kit.dart';
import 'package:media_kit_video/media_kit_video_controls/src/controls/extensions/duration.dart';

class CustomSeekBar extends StatefulWidget {
  final Player player;
  final Duration? delta;
  final Function(Duration)? onSeekStart;
  final Function(Duration)? onSeekEnd;

  const CustomSeekBar({
    super.key,
    this.onSeekStart,
    this.onSeekEnd,
    required this.player,
    this.delta,
  });

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

class CustomSeekBarState extends State<CustomSeekBar> {
  Duration? tempPosition;
  late Player player = widget.player;
  Duration position = Duration.zero;
  late Duration duration = player.state.duration;
  Duration buffer = Duration.zero;

  @override
  void initState() {
    super.initState();
    player.stream.position.listen((event) {
      if (mounted) {
        setState(() {
          position = event;
        });
      }
    });
    player.stream.duration.listen((event) {
      if (mounted) {
        setState(() {
          duration = event;
        });
      }
    });
    player.stream.buffer.listen((event) {
      if (mounted) {
        setState(() {
          buffer = event;
        });
      }
    });
    position = player.state.position;
    duration = player.state.duration;
    buffer = player.state.buffer;
  }

  final isDesktop = Platform.isMacOS || Platform.isWindows || Platform.isLinux;
  @override
  Widget build(BuildContext context) {
    final maxValue = max(duration.inMilliseconds.toDouble(), 0).toDouble();
    final rawValue = (widget.delta ?? tempPosition ?? position).inMilliseconds
        .toDouble();
    final clampedValue = rawValue.clamp(0, maxValue).toDouble();
    return SizedBox(
      height: 20,
      child: Row(
        children: [
          if (!isDesktop)
            SizedBox(
              width: 70,
              child: Center(
                child: Text(
                  (widget.delta ?? tempPosition ?? position).label(
                    reference: duration,
                  ),
                  style: const TextStyle(
                    height: 1.0,
                    fontSize: 12.0,
                    color: Colors.white,
                  ),
                ),
              ),
            ),
          Expanded(
            child: SliderTheme(
              data: SliderTheme.of(context).copyWith(
                trackHeight: isDesktop ? null : 3,
                overlayShape: const RoundSliderOverlayShape(overlayRadius: 5.0),
              ),
              child: Slider(
                max: maxValue,
                value: clampedValue,
                secondaryTrackValue: max(buffer.inMilliseconds.toDouble(), 0),
                onChanged: (value) {
                  widget.onSeekStart?.call(
                    Duration(
                      milliseconds: value.toInt() - position.inMilliseconds,
                    ),
                  );
                  if (mounted) {
                    setState(() {
                      tempPosition = Duration(milliseconds: value.toInt());
                    });
                  }
                },
                onChangeEnd: (value) async {
                  widget.onSeekEnd?.call(
                    Duration(
                      milliseconds: value.toInt() - position.inMilliseconds,
                    ),
                  );
                  widget.player.seek(Duration(milliseconds: value.toInt()));
                },
              ),
            ),
          ),
          if (!isDesktop)
            SizedBox(
              width: 70,
              child: Center(
                child: Text(
                  duration.label(reference: duration),
                  style: const TextStyle(
                    height: 1.0,
                    fontSize: 12.0,
                    color: Colors.white,
                  ),
                ),
              ),
            ),
        ],
      ),
    );
  }
}