import 'dart:convert';
import 'dart:io';

import 'package:esc_pos_bluetooth/esc_pos_bluetooth.dart';
import 'package:flutter/material.dart';
import 'package:flutter_redux/flutter_redux.dart';
import 'package:satu/core/models/entity_data/transaction_data.dart';
import 'package:satu/core/models/flow/sell_response.dart';
import 'package:satu/core/models/settings/printer_setting.dart';
import 'package:satu/core/redux/store.dart';
import 'package:satu/core/services/dialog_service.dart';
import 'package:satu/core/utils/locator.dart';
import 'package:satu/core/utils/pos_printer.dart';
import 'package:satu/shared/app_colors.dart';
import 'package:satu/widgets/bar/products_app_bar.dart';

class ReceiptView extends StatefulWidget {
  const ReceiptView({
    required this.transactionData,
    Key? key,
  }) : super(key: key);

  final TransactionData transactionData;

  @override
  State<ReceiptView> createState() => _ReceiptViewState();
}

class _ReceiptViewState extends State<ReceiptView> {
  final DialogService _dialogService = locator<DialogService>();
  PrinterBluetoothManager printerManager = PrinterBluetoothManager();
  bool printerLocked = false;

  void print() async {
    setState(() {
      printerLocked = true;
    });
    try {
      PrinterSetting printerSetting = Redux.store!.state.settingState!.printer!;
      printerManager.selectPrinter(
        PrinterBluetooth(
          printerDeviceToBluetoothDevice(printerSetting.device!),
        ),
      );
      final int chunkSizeBytes = getChunkSize();
      final int queueSleepTimeMs = getQueueSleep();

      List<int> data = List.empty();
      if (PrinterConst.encodingBigEncoding == printerSetting.encoding) {
        data = await getReceiptImg(
          printerSetting.paperSize!,
          base64Decode(widget.transactionData.sellResponse!.checkPng!),
        );
      } else {
        data = await getReceipt(
          printerSetting.encoding!,
          printerSetting.paperSize!,
          widget.transactionData.sellResponse!.check!
        );
      }

      final PosPrintResult printResult = await printerManager.writeBytes(
        data,
        chunkSizeBytes: chunkSizeBytes,
        queueSleepTimeMs: queueSleepTimeMs,
      );
      if (printResult.value != 1) {
        _dialogService.showDialog(description: printResult.msg);
      }
    } finally {
      await Future.delayed(const Duration(seconds: 7));
      setState(() {
        printerLocked = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: whiteColor,
      appBar: ProductsAppBar(
        title: 'Просмотр чека',
        actions: [
          StoreConnector<AppState, PrinterSetting>(
            converter: (store) => store.state.settingState!.printer!,
            builder: (context, snapshot) {
              final bool success =
                  snapshot.device != null && printerLocked == false;
              return IconButton(
                onPressed: success ? print : null,
                icon: Icon(
                  Icons.print,
                  color: success ? textColor : placeholderColor,
                ),
              );
            },
          )
        ],
      ),
      body: Column(
        children: [
          Expanded(
            child: SingleChildScrollView(
              physics: const BouncingScrollPhysics(),
              child: Center(
                child:
                    imageFromBase64String(widget.transactionData.sellResponse),
              ),
            ),
          )
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          // Add your onPressed code here!
        },
        backgroundColor: successColor,
        child: const Icon(
          Icons.share_rounded,
          size: 20,
        ),
      ),
    );
  }
}

Widget imageFromBase64String(SellResponse? sellResponse) {
  final String? base64String = sellResponse?.checkPng;
  if (base64String == null) {
    return const Padding(
      padding: EdgeInsets.symmetric(vertical: 10.0, horizontal: 8.0),
      child: Center(
        child: Text('Отсутсвует информация о чеке'),
      ),
    );
  }
  return Padding(
    padding: const EdgeInsets.symmetric(vertical: 10.0, horizontal: 8.0),
    child: Image.memory(base64Decode(base64String)),
  );
}