import 'dart:io';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
import 'package:lszlgl/page/sample_task/reap_sample_detail/reap_sample_task_page.dart';
import 'package:qr_code_scanner/qr_code_scanner.dart';

import '../../base/base_lifecycle_state.dart';
import '../../widget/button.dart';

class QrCodeScanPage extends StatefulWidget {
  const QrCodeScanPage({super.key});

  @override
  State<QrCodeScanPage> createState() => _QrCodeScanPageState();
}

class _QrCodeScanPageState extends BaseLifecycleState<QrCodeScanPage> with SingleTickerProviderStateMixin {
  final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
  Barcode? result;
  QRViewController? controller;
  late AnimationController _ctrl;
  late Animation<Offset> animation;

  void _onQRViewCreated(QRViewController controller) {
    this.controller = controller;
    controller.scannedDataStream.listen((scanData) {
      debugPrint('code:${scanData.code} format:${scanData.format} rawBytes:${scanData.rawBytes}');
      controller.pauseCamera();
      parseCode(scanData);
    });
  }

  void parseCode(Barcode data) {
    String code = data.code ?? '';
    if (code.isEmpty) {
      showErrorDialog('内容为空，请扫描正确二维码');
      return;
    }
    // 121.36.17.6:19090/admin-api/zj/code-sampling-task-details-sgjc/getSamplingTaskDetails?id=47106
    List<String> split = code.split('?');
    if (!code.contains('?') || split.length <= 1 || !split[0].contains('/')) {
      showErrorDialog(code);
      return;
    }
    String api = split[0].split('/').last;

    Map<String, String> params = {};
    for (String value in split[1].split('&')) {
      List<String> kv = value.split('=');
      params[kv[0]] = kv[1];
    }

    switch (api) {
      case 'getSamplingTaskDetails':
        // 收获扦样详情
        if (params['id'] == null) {
          showErrorDialog(code);
          return;
        }
        MyRouter.startReapSampleTask(
          args: ReapSampleTaskPageArgs(id: num.parse(params['id']!), detail: true),
          replace: true,
        );
      default:
        showErrorDialog(code);
    }
  }

  void showErrorDialog(String msg) async {
    await showDialog(
      context: context,
      builder: (_) => AlertDialog(
        title: Text(msg),
        actions: [MyButton('确定', alignment: null, onTap: () => MyNavigator.pop())],
      ),
    );
    controller?.resumeCamera();
  }

  // In order to get hot reload to work we need to pause the camera if the platform
  // is android, or resume the camera if the platform is iOS.
  @override
  void reassemble() {
    super.reassemble();
    if (Platform.isAndroid) {
      controller!.pauseCamera();
    } else if (Platform.isIOS) {
      controller!.resumeCamera();
    }
  }

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

  @override
  void initState() {
    super.initState();
    // 创建动画控制器
    _ctrl = AnimationController(
      vsync: this,
      duration: const Duration(seconds: 2),
    );
    animation = Tween<Offset>(
      begin: const Offset(0, -0.25),
      end: const Offset(0, 0.25),
    ).animate(_ctrl);
    _ctrl.repeat();
  }

  @override
  Widget build(BuildContext context) {
    return myScaffold(child: buildBody());
  }

  Widget buildBody() {
    return AnnotatedRegion<SystemUiOverlayStyle>(
      value: SystemUiOverlayStyle.light,
      child: Stack(
        fit: StackFit.expand,
        children: [
          // myAppBar(
          //   title: '扫一扫',
          //   actions: [buildFlash()],
          // ),
          Positioned.fill(
            child: QRView(
              key: qrKey,
              onQRViewCreated: _onQRViewCreated,
            ),
          ),
          Positioned(
            top: 0,
            left: 0,
            right: 0,
            child: buildAppBar(),
          ),
          SlideTransition(
            position: animation,
            child: Image.asset(imgScanScanning, width: double.infinity),
          ),
        ],
      ),
    );
  }

  Widget buildAppBar() {
    return Padding(
      padding: EdgeInsets.only(top: MediaQuery.of(context).padding.top),
      child: Stack(
        alignment: Alignment.center,
        children: [
          Positioned(left: 0, child: buildBack()),
          const Text(
            '扫一扫',
            textAlign: TextAlign.center,
            style: TextStyle(color: Colors.white, fontSize: 20),
          ),
          Positioned(
            right: 0,
            child: buildFlash(),
          ),
        ],
      ),
    );
  }

  Widget buildBack() {
    return GestureDetector(
      onTap: () => MyNavigator.pop(),
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16),
        child: Image.asset(imgScanBack, width: 24, height: 24),
      ),
    );
  }

  Widget buildFlash() {
    return GestureDetector(
      onTap: () => controller?.toggleFlash(),
      behavior: HitTestBehavior.opaque,
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16),
        child: Row(
          children: [
            Image.asset(imgScanFlash, width: 24, height: 24),
            const Text(
              '闪光灯',
              textAlign: TextAlign.center,
              style: TextStyle(color: Colors.white, fontSize: 14),
            ),
          ],
        ),
      ),
    );
  }
}