import 'dart:io';

import 'package:flutter/material.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> {
  final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
  Barcode? result;
  QRViewController? controller;

  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();
    super.dispose();
  }

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

  Widget buildBody() {
    return Column(
      children: [
        myAppBar(
          title: '扫一扫',
          actions: [buildFlash()],
        ),
        Expanded(
          child: QRView(
            key: qrKey,
            onQRViewCreated: _onQRViewCreated,
          ),
        ),
      ],
    );
  }

  Widget buildFlash() {
    return GestureDetector(
      onTap: () => controller?.toggleFlash(),
      behavior: HitTestBehavior.opaque,
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 16),
        alignment: Alignment.center,
        child: const Text('闪光灯', style: TextStyle(fontSize: 14, color: Colors.white)),
      ),
    );
  }
}