import 'dart:ffi';
import 'dart:io';

import 'package:excel/excel.dart';
import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';

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

  @override
  State<OrderList> createState() => _OrderListState();
}

class _OrderListState extends State<OrderList> {
  final List lst = [];
  List<String> headers = [];
  ScrollController scrollController = ScrollController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          backgroundColor: Colors.white,
          title: const Text("test"),
          actions: [
            IconButton(
                onPressed: () {
                  importExcelFile();
                },
                icon: const Icon(Icons.add_circle)),
            IconButton(onPressed: () {}, icon: const Icon(Icons.output))
          ],
        ),
        body: Container(
          width: double.infinity,
          // color: Colors.white,
          padding: const EdgeInsets.all(20),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Card(
                color: Colors.white,
                margin: EdgeInsets.zero,
                child: headers.isNotEmpty
                    ? Scrollbar(
                        controller: scrollController,
                        child: SingleChildScrollView(
                          scrollDirection: Axis.horizontal,
                          padding: const EdgeInsets.all(12.0),
                          child: DataTable(
                            columns: headers.map((el) {
                              return DataColumn(label: Text(el));
                            }).toList() /*const [
                    DataColumn(
                        label: Text(
                      "下单时间",
                    )),
                    DataColumn(
                        label: Text(
                      "物流公司",
                    )),
                    DataColumn(
                        label: Text(
                      "付款方式",
                    )),
                    DataColumn(
                        label: Text(
                      "金额",
                    )),
                    DataColumn(
                        label: Text(
                      "物流包裹",
                    )),
                    DataColumn(
                        label: Text(
                      "操作",
                      textAlign: TextAlign.center,
                    )),
                  ]*/
                            ,
                            rows: [], /* rows: [
                  DataRow(cells: [
                    const DataCell(Text("2024-01-12")),
                    const DataCell(Text("圆通速递")),
                    const DataCell(Text("套餐券")),
                    const DataCell(Text("12")),
                    DataCell(ElevatedButton(
                        onPressed: () {}, child: const Text("编辑包裹"))),
                    DataCell(ElevatedButton(
                        onPressed: () {}, child: const Text("编辑"))),
                  ]),
                ]*/
                          ),
                        ))
                    : Text("empty"),
              )
            ],
          ),
        ));
  }

  Future<String> importExcelFile() async {
    FilePickerResult? result = await FilePicker.platform
        .pickFiles(type: FileType.custom, allowedExtensions: ["xlsx", "xls"]);
    if (result != null) {
      File file = File(result.files.single.path!);
      var bytes = file.readAsBytesSync();
      Excel excel = Excel.decodeBytes(bytes);
      String tableKey = excel.tables.keys.first;
      List<String> _headers = excel.tables[tableKey]?.rows.first.map((el) {
            return el?.value.toString() ?? "";
          }).toList() ??
          [];
      setState(() {
        headers = _headers;
      });
    } else {
      //   取消选择
    }
    return "";
  }
}