import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';

import '../../api/api_service.dart';
import '../../common/custom_search_bar.dart';
import '../../common/empty_count.dart';
import '../../common/my_sliver_persistent_header_delegate.dart';
import 'mat_card.dart';

class MatDetlsPage extends StatefulWidget {
  final List<Map<String, dynamic>>? data;

  const MatDetlsPage({super.key, this.data});

  @override
  State<MatDetlsPage> createState() => _MatDetlsState();
}

class _MatDetlsState extends State<MatDetlsPage> {
  /// 输入框焦点
  FocusNode focusNode = FocusNode();

  // List<Map<String, dynamic>> items = [
  //
  // ];
  var items = [];

  @override
  void initState() {
    super.initState();
    items = widget.data!;
  }

  ///
  void _searchMat(value) async {
    var matAuth = await ApiService.matAuth(value);
    if (matAuth['data'] != null) {
      Get.toNamed('/mat_form_page', arguments: matAuth['data'])
          ?.then((result) => {
        if (result != null)
          {
            setState(() {
              addItem(result);
            }),
          }
      });
    } else {
      Get.snackbar(
        "检索失败",
        '未检索到该物料：$value',
        duration: Duration(seconds: 2),
        backgroundColor: Color.fromRGBO(216, 97, 97, .8),
        colorText: Colors.white,
      );
    }
  }

  void addItem(item) {
    var fieldsToMatch = ['matnr', 'batch'];
    for (var existingItem in items) {
      bool isMatch =
          fieldsToMatch.every((field) => existingItem[field] == item[field]);

      if (isMatch) {
        var val = existingItem['anfme'];
        print('Existing value: $val');
        var newVal = item['anfme'];
        print('New value: $newVal');
        if ((val is int && newVal is int) || (val is double && newVal is double)) {
          existingItem['anfme'] = val + newVal;
          print('Updated value: $val');
        } else {
          print('Error: Value is not a number');
        }
        return;
      }
    }
    items.add(item);
  }

  void _updateItem(int index, item) {
    var args = {'index': index, 'item': item};
    Get.toNamed('/mat_form_page', arguments: args)?.then((result) => {
          if (result != null)
            {
              setState(() {
                var index = result['index'];
                var newItem = result['item'];
                setState(() {
                  items[index] = newItem;
                });
              }),
            }
        });
  }

  void deleteItem(int index) {
    setState(() {
      // 删除指定索引的对象
      items.removeAt(index);
    });
  }



  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('组托物料明细'),
        leading: IconButton(
          icon: Icon(Icons.arrow_back),
          onPressed: () {
            // 在这里处理返回逻辑
            Get.back(result: items);
          },
        ),
      ),
      body: WillPopScope(
        onWillPop: () async {
          // 当按下返回按钮时，返回数据给父页面
          Get.back(result: items);
          return true; // 允许返回
        },
        child: CustomScrollView(
          slivers: [
            SliverPersistentHeader(
              pinned: true, // 设置为true，表示吸顶效果
              delegate: MySliverPersistentHeaderDelegate(
                  minHeight: 60, // 最小高度
                  maxHeight: 60, // 最大高度
                  child: CustomSearchBar(
                    onChanged: _searchMat,
                    onTap: () {
                      Get.toNamed('/get_mat_page')?.then((result) => {
                            if (result != null)
                              {
                                _searchMat(result),
                              }
                          });
                    },
                  )),
            ),
            SliverList(
              delegate: items.isEmpty
                  ? SliverChildBuilderDelegate(
                      (context, index) {
                        print('Building item at index: $index'); // 添加调试信息
                        return EmptyCount();
                      },
                      childCount: 1, // 项目数量
                    )
                  : SliverChildBuilderDelegate(
                      (context, index) {
                        var item = items[index];
                        return Padding(
                          padding: EdgeInsets.only(
                              top: 0, right: 16, left: 16, bottom: 0),
                          child: MatCard(
                            item: item,
                            isEdit: true,
                            update: () => _updateItem(index, item),
                            delete: () => deleteItem(index),
                          ),
                        );
                      },
                      childCount: items.length, // 项目数量
                    ),
            ),
          ],
        ),
      ),
    );
  }
}