import 'package:flutter/material.dart';
import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
import 'package:intl/intl.dart';
import 'package:satu/core/services/buy_service.dart';
import 'package:satu/core/utils/utils_parse.dart';

import '../../../../core/models/buy_invoice/buy_invoice_response.dart';
import '../../../../core/services/navigator_service.dart';
import '../../../../core/utils/locator.dart';
import '../../../../routes/route_names.dart';
import '../../../../shared/app_colors.dart';
import '../../../../shared/shared_styles.dart';
import '../../../../shared/ui_helpers.dart';
import '../../../../widgets/bar/products_app_bar.dart';
import '../../../dictionaries/component/dictionary_list_tile.dart';
import '../../../inventarization/widget/inventarization_list_tile.dart';

class BuyView extends StatefulWidget {
  @override
  State<BuyView> createState() => _BuyViewState();
}

class _BuyViewState extends State<BuyView> {
  final BuyService _service = locator<BuyService>();
  final NavigatorService _navigatorService = locator<NavigatorService>();

  static const _pageSize = 20;

  final PagingController<int, BuyInvoiceResponse> _pagingController =
      PagingController(firstPageKey: 1);

  final DateFormat formatterDay = DateFormat('dd.MM.yyyy');

  @override
  void initState() {
    _pagingController.addPageRequestListener((pageKey) {
      _fetchData(pageKey, _pageSize);
    });
    super.initState();
  }

  @override
  void dispose() {
    _pagingController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const ProductsAppBar(
        title: 'Накладные покупок',
        drawerShow: true,
      ),
      body: Column(
        children: [
          Expanded(
            child: PagedListView<int, BuyInvoiceResponse>.separated(
              physics: const BouncingScrollPhysics(),
              separatorBuilder: (BuildContext context, int index) {
                return const Divider(
                  height: 1.0,
                  color: disableColor,
                );
              },
              pagingController: _pagingController,
              builderDelegate: PagedChildBuilderDelegate<BuyInvoiceResponse>(
                itemBuilder:
                    (BuildContext context, BuyInvoiceResponse item, int index) {
                  return DictionaryTile(
                    key: Key('category_${item.id}'),
                    onPress: () async {
                      final dynamic result = await _navigatorService
                          .push(buyEditRoute, arguments: item);
                      if (result != null && true == (result as bool)) {
                        _pagingController.refresh();
                      }
                    },
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                        Expanded(
                            flex: 2,
                            child: Column(
                              crossAxisAlignment: CrossAxisAlignment.start,
                              children: [
                                Text(
                                  '${item.name}',
                                  style: textBlack12Style,
                                ),
                                SizedBox(
                                  height: 5.0,
                                ),
                                Text(
                                  'Номер: ${item.docNumber.toString()}',
                                  style: textGray11Style,
                                ),
                              ],
                            )),
                        Expanded(
                          flex: 2,
                          child: Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(
                                '${formatterDay.format(item.invoiceDate)}',
                                style: textBlack12Style,
                              ),
                              SizedBox(
                                height: 5.0,
                              ),
                              Text(
                                'Статус: ${item.refBuyInvoiceStatusId == 1 ? 'Новая' : 'Обработана'}',
                                style: textGray11Style,
                              ),
                            ],
                          ),
                        ),
                        Expanded(
                          flex: 1,
                          child: Column(
                            children: [
                              Text(
                                '${formatDecimal(item.summ ?? 0)} т.',
                                style: textGray11Style,
                              ),
                            ],
                          ),
                        ),
                      ],
                    ),
                  );
                },
              ),
            ),
          )
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          final dynamic result = await _navigatorService.push(buyAddRoute);
          if (result != null && true == (result as bool)) {
            _pagingController.refresh();
          }
        },
        mini: true,
        child: const Icon(Icons.add),
      ),
    );
  }

  Future<void> _fetchData(int pageKey, int perPage) async {
    final List<BuyInvoiceResponse> newItems =
        await _service.getList(page: pageKey, perpage: perPage);
    final isLastPage = newItems.length < _pageSize;
    if (isLastPage) {
      _pagingController.appendLastPage(newItems);
    } else {
      final nextPageKey = pageKey + 1;
      _pagingController.appendPage(newItems, nextPageKey);
    }
  }


}