import 'dart:async';

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:hgdj/assets_tool/images.dart';
import 'package:hgdj/hj_page/video/video_full_page.dart';
import 'package:hgdj/hj_page/video/view/video_menu_view.dart';
import 'package:hgdj/hj_utils/screen.dart';
import 'package:hgdj/hj_utils/video_view_type.dart';
import 'package:hgdj/tools_base/event_bus/event_bus_util.dart';
import 'package:hgdj/tools_base/event_bus/events.dart';
import 'package:hgdj/tools_base/loading/loading_center_widget.dart';
import 'package:video_player/video_player.dart';

import '../../tools_base/widget/net_image_widget.dart';

class VideoPlayerAlert extends StatefulWidget {
  final String? movieUrl;
  final String? imgCover;

  const VideoPlayerAlert(this.movieUrl, {this.imgCover, super.key});

  @override
  State<VideoPlayerAlert> createState() => _VideoPlayerAlertState();
}

class _VideoPlayerAlertState extends State<VideoPlayerAlert> {
  VideoPlayerController? videoCtr;
  StreamSubscription? pauseSub;

  @override
  void initState() {
    super.initState();
    // 耳机/蓝牙断开、来电中断时暂停，防止外放泄露
    pauseSub = eventBus.on<PauseVideoEvent>((_) => videoCtr?.pause());
    WidgetsBinding.instance.addPostFrameCallback((_) => _initStatus());
  }

  void _initStatus({bool isRetry = false}) async {
    videoCtr = PlayerFactory.network(widget.movieUrl);
    try {
      await videoCtr?.initialize();
      if (isRetry)
        confirmPlatformView(); // 仅重试成功(同视频 textureView 挂、platformView 放出)才落本地
      if (mounted) {
        videoCtr?.play();
        setState(() {});
      }
    } catch (e) {
      videoCtr?.dispose();
      // 首次芯片解码/渲染报错：仅内存切 platformView 重试，成功后才落本地
      if (isDecoderError(e) && switchToPlatformView()) {
        _initStatus(isRetry: true);
      }
    }
  }

  @override
  void dispose() {
    pauseSub?.cancel();
    videoCtr?.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Dialog(
      insetPadding: EdgeInsets.zero,
      backgroundColor: Colors.transparent,
      child: SafeArea(
        child: Stack(
          fit: StackFit.expand,
          children: [
            _buildContent(),
            Positioned(
              left: 0,
              top: 0,
              child: InkWell(
                enableFeedback: false,
                onTap: Get.back,
                child: Container(
                  padding: EdgeInsets.only(left: 16, top: 6),
                  child: Image.asset('back_circle.png'.commonImgPath,
                      width: 24, height: 24),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildContent() {
    // 未初始化完成：展示封面 + loading
    if (videoCtr?.value.isInitialized != true) {
      return Stack(
        alignment: Alignment.center,
        children: [
          if (widget.imgCover?.isNotEmpty == true)
            NetworkImageLoader(imageUrl: widget.imgCover ?? ""),
          LoadingCenterWidget(),
        ],
      );
    }
    return Stack(
      fit: StackFit.expand,
      children: [
        Container(
          alignment: Alignment.center,
          width: screen.screenWidth,
          child: AspectRatio(
            aspectRatio: videoCtr!.value.aspectRatio,
            child: VideoPlayer(videoCtr!),
          ),
        ),
        VideoMenuView(
          playCtr: videoCtr!,
          isFull: true,
          onFullScreen: () =>
              Get.to(() => VideoFullPage(playCtr: videoCtr!, isAutoV: false)),
        ),
      ],
    );
  }
}