app/lib/paegs/home_page/home_page.dart

import 'dart:async';
import 'dart:convert';

import 'package:bbyyy/beans/ad_bean_entity.dart';
import 'package:bbyyy/beans/commodity_category_bean_entity.dart';
import 'package:bbyyy/beans/goods_bean_entity.dart';
import 'package:bbyyy/beans/my_shop_bean_entity.dart';
import 'package:bbyyy/beans/store_bean_entity.dart';
import 'package:bbyyy/beans/system_information_bean_entity.dart';
import 'package:bbyyy/https/MyDio.dart';
import 'package:bbyyy/my_tools/const.dart';
import 'package:bbyyy/my_tools/dims.dart';
import 'package:bbyyy/my_tools/event_bus.dart';
import 'package:bbyyy/my_tools/my_colors.dart';
import 'package:bbyyy/my_tools/my_cookie.dart';
import 'package:bbyyy/my_tools/my_tools.dart';
import 'package:bbyyy/my_tools/my_views.dart';
import 'package:bbyyy/paegs/root_page/root_page_view.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:flutter_swiper/flutter_swiper.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage>
    with AutomaticKeepAliveClientMixin {
  var data = [];
  var container = [];
  var puShop = [];
  var imgs = ['images/banner1.png', 'images/banner2.png', 'images/banner3.png'];
  int selectedIndex = 0;
  var tabs = ['全部'];
  var types = ['货帮', '货品'];
  List<DropdownMenuItem<String>> sortItems = [];
  int typeIndex = 1;
  List<MyShopBeanDataData> shops = [];

  ScrollController _controller = ScrollController();
  double maxH;
  double minH = 164;
  double H = 0;
  bool showInput = false;
  TextEditingController _description = TextEditingController();
  FocusNode _descriptionFocus = FocusNode();

  RefreshController _reController = RefreshController(initialRefresh: true);
  int page = 1;
  int pageIndex = 0;
  bool showS = false;

  @override
  void initState() {
    super.initState();
    EventBus().on('commodity_category', (arg) {
      setState(() {});
    });
    EventBus().on('uploadGoods', (arg) {
      _reController.requestRefresh();
    });
    EventBus().on('toTop', (arg) {
      _controller.animateTo(0.0,
          duration: Duration(milliseconds: 200), curve: Curves.easeIn);
    });
    EventBus().on('商品变动', (arg) {
      _reController.requestRefresh();
    });
    _controller.addListener(() {
      setState(() {
        if (_controller.offset == 0) {
          RootPageView().toTop = false;
          EventBus().emit('ChangePage');
        } else {
          RootPageView().toTop = true;
          EventBus().emit('ChangePage');
        }
        H = maxH - _controller.offset;
        if (H < minH) {
          H = minH;
        } else if (H > maxH) {
          H = maxH;
        }
      });
    });
    types.forEach((element) {
      sortItems.add(DropdownMenuItem(
        child: Text(
          element,
          style: TextStyle(color: MyColors.c666666, fontSize: 14),
        ),
        value: element,
      ));
    });
    _descriptionFocus.addListener(() {
      if (_descriptionFocus.hasFocus) {
      } else {
        if (_description.text.isEmpty) {
          showInput = false;
        }
      }
    });
  }

  @override
  void dispose() {
    // TODO: implement dispose
    super.dispose();
    EventBus().off('commodity_category');
    EventBus().off('uploadGoods');
    EventBus().off('toTop');
  }

  @override
  Widget build(BuildContext context) {
    maxH = MediaQuery.of(context).size.width * (520 / 750);
    minH = MediaQuery.of(context).padding.top + 64;
    if (H == 0) {
      H = maxH;
    }
    return GestureDetector(
      onTap: () {
        MyTools().hideKeyboard(context);
      },
      behavior: HitTestBehavior.translucent,
      child: Scaffold(
        resizeToAvoidBottomInset: false,
        body: Column(
          children: [
            Stack(
              children: [
                AnimatedContainer(
                  height: H,
                  duration: Duration(milliseconds: 200),
                  child: Swiper(
                    itemBuilder: (BuildContext context, int index) {
                      return new Image.asset(
                        "${imgs[index]}",
                        fit: BoxFit.cover,
                      );
                    },
                    itemCount: 3,
                    viewportFraction: 1,
                    scale: 1,
                    autoplay: true,
                  ),
                ),
                SafeArea(
                  bottom: false,
                  child: Stack(
                    children: [
                      AnimatedOpacity(
                        duration: Duration(milliseconds: 200),
                        opacity: showS ? 0.0 : 1.0,
                        child: Container(
                          margin: EdgeInsets.only(top: 18),
                          width: double.infinity,
                          child: Row(
                            children: [
                              GestureDetector(
                                onTap: () {
                                  setState(() {
                                    pageIndex = 0;
                                    _reController.requestRefresh();
                                  });
                                },
                                behavior: HitTestBehavior.translucent,
                                child: Container(
                                  height: 28,
                                  width: 60,
                                  alignment: Alignment.center,
                                  child: Column(
                                    children: [
                                      Text(
                                        '店铺',
                                        style: TextStyle(
                                            color: pageIndex == 0
                                                ? MyColors.cFF4233
                                                : MyColors.c333333,
                                            fontSize: 16,
                                            fontWeight: FontWeight.bold),
                                      ),
                                      Visibility(
                                        child: Container(
                                          width: 32,
                                          height: 2,
                                          decoration: BoxDecoration(
                                              color: MyColors.cFF4233,
                                              borderRadius:
                                                  BorderRadius.circular(1)),
                                        ),
                                        visible: pageIndex == 0,
                                      ),
                                    ],
                                  ),
                                ),
                              ),
                              Container(
                                width: 40,
                              ),
                              GestureDetector(
                                onTap: () {
                                  setState(() {
                                    pageIndex = 1;
                                    _reController.requestRefresh();
                                  });
                                },
                                behavior: HitTestBehavior.translucent,
                                child: Container(
                                  height: 28,
                                  width: 60,
                                  alignment: Alignment.center,
                                  child: Column(
                                    children: [
                                      Text(
                                        '商品',
                                        style: TextStyle(
                                            color: pageIndex == 1
                                                ? MyColors.cFF4233
                                                : MyColors.c333333,
                                            fontSize: 16,
                                            fontWeight: FontWeight.bold),
                                      ),
                                      Visibility(
                                        child: Container(
                                          width: 32,
                                          height: 2,
                                          decoration: BoxDecoration(
                                              color: MyColors.cFF4233,
                                              borderRadius:
                                                  BorderRadius.circular(1)),
                                        ),
                                        visible: pageIndex == 1,
                                      ),
                                    ],
                                  ),
                                ),
                              ),
                            ],
                            mainAxisAlignment: MainAxisAlignment.center,
                          ),
                        ),
                      ),
                      Container(
                        padding: EdgeInsets.only(left: 10, right: 10, top: 12),
                        child: GestureDetector(
                          onTap: () {
                            showS = !showS;
                            if (!showS) {
                              _description.clear();
                            }
                            setState(() {});
                          },
                          behavior: HitTestBehavior.translucent,
                          child: AnimatedContainer(
                            height: 40,
                            width:
                                !showS ? 40 : MediaQuery.of(context).size.width,
                            child: Row(
                              children: [
                                SvgPicture.asset(
                                  showS
                                      ? 'images/svg/箭头.svg'
                                      : 'images/svg/搜索.svg',
                                  height: 15,
                                  width: 15,
                                  color:
                                      showS ? MyColors.cFF4233 : Colors.white,
                                ),
                                Visibility(
                                  visible: showS,
                                  child: Expanded(
                                    child: TextField(
                                      controller: _description,
                                      cursorColor: MyColors.cFF4233,
                                      cursorWidth: 1.0,
                                      onTap: () {},
                                      decoration: InputDecoration(
                                        border: InputBorder.none,
                                        disabledBorder: InputBorder.none,
                                        enabledBorder: InputBorder.none,
                                        focusedBorder: InputBorder.none,
                                        isDense: true,
                                        hintText: '请输入...',
                                        hintStyle: TextStyle(
                                            color: MyColors.c999999,
                                            fontSize: 16),
                                        contentPadding:
                                            const EdgeInsets.fromLTRB(
                                                14, 4.5, 8, 4.5),
                                      ),
                                      maxLines: 1,
                                      style: TextStyle(
                                          color: MyColors.c333333,
                                          fontSize: 16,
                                          height: 1.3,
                                          letterSpacing: 0.2),
                                      keyboardType: TextInputType.text,
                                      onChanged: (t) {
                                        setState(() {});
                                      },
                                    ),
                                  ),
                                ),
                                Visibility(
                                  visible:
                                      showS && _description.text.isNotEmpty,
                                  child: GestureDetector(
                                    onTap: () {
                                      MyTools().hideKeyboard(context);
                                      _reController.requestRefresh();
                                    },
                                    behavior: HitTestBehavior.translucent,
                                    child: Container(
                                      child: MyViews()
                                          .myText('搜索', Colors.white, 13),
                                      decoration: BoxDecoration(
                                        color: MyColors.cFF4233,
                                        borderRadius: BorderRadius.circular(20),
                                      ),
                                      height: 40,
                                      width: 80,
                                      alignment: Alignment.center,
                                    ),
                                  ),
                                )
                              ],
                              mainAxisAlignment: MainAxisAlignment.center,
                            ),
                            alignment: !showS
                                ? Alignment.center
                                : Alignment.centerLeft,
                            padding: EdgeInsets.only(left: !showS ? 0 : 12),
                            decoration: BoxDecoration(
                                borderRadius:
                                    BorderRadius.all(Radius.circular(20)),
                                color: showS ? Colors.white : MyColors.cFF4233),
                            duration: Duration(milliseconds: 200),
                          ),
                        ),
                        alignment: Alignment.centerRight,
                      ),
                    ],
                  ),
                ),
              ],
            ),
            Column(
              children: [
                Container(
                  height: 53,
                  child: ListView.builder(
                    padding: EdgeInsets.only(left: 12, right: 12),
                    itemBuilder: (c, index) {
                      return GestureDetector(
                        onTap: () {
                          setState(() {
                            selectedIndex = index;
                            _reController.requestRefresh();
                          });
                        },
                        behavior: HitTestBehavior.translucent,
                        child: Container(
                          padding:
                              EdgeInsets.only(right: 15, left: 15, bottom: 9),
                          child: Column(
                            children: [
                              Text(
                                tabs[index],
                                style: TextStyle(
                                    color: index == selectedIndex
                                        ? MyColors.cFF4233
                                        : MyColors.c666666,
                                    fontSize: 14),
                              ),
                              Container(
                                height: 10,
                                child: Visibility(
                                  child: SvgPicture.asset('images/svg/tab.svg'),
                                  visible: index == selectedIndex,
                                ),
                              )
                            ],
                            mainAxisAlignment: MainAxisAlignment.end,
                          ),
                          height: 53,
                        ),
                      );
                    },
                    itemCount: tabs.length,
                    scrollDirection: Axis.horizontal,
                  ),
                ),
                Container(
                  height: 1,
                  color: MyColors.cf2f2f2,
                ),
              ],
            ),
            Expanded(
              flex: 1,
              child: SmartRefresher(
                controller: _reController,
                onRefresh: onRefresh,
                onLoading: onLoading,
                enablePullDown: true,
                enablePullUp: true,
                child: body(),
              ),
            )
          ],
        ),
      ),
    );
  }

  @override
  // TODO: implement wantKeepAlive
  bool get wantKeepAlive => true;

  void getGoods(List<dynamic> shopUID) {
    var qData;
    if (shopUID.length == 0) {
      var conditions = ["public == true", "on_sale == true"];
      if (selectedIndex != 0) {
        conditions.add("category == ${tabs[selectedIndex]}");
      }
      if (_description.text.isNotEmpty) {
        conditions.add('title LIKE ${_description.text.toString()}');
      }
      qData = {
        "key": "commodity",
        "filters": {"conditions": conditions},
        "dims": commodityDims,
        "paging": [page, 20]
      };
    } else {
      var conditions = ["shop_uid in $shopUID", "on_sale == true"];
      var conditions2 = ["public == true", "on_sale == true"];
      if (selectedIndex != 0) {
        conditions.add("category == ${tabs[selectedIndex]}");
        conditions2.add("category == ${tabs[selectedIndex]}");
      }
      if (_description.text.isNotEmpty) {
        conditions.add('title LIKE ${_description.text.toString()}');
        conditions2.add('title LIKE ${_description.text.toString()}');
      }
      qData = {
        "key": "commodity",
        "filters": {
          "or": true,
          "conditions": conditions,
          "filters": [
            {"conditions": conditions2}
          ]
        },
        "dims": commodityDims,
        "paging": [page, 20]
      };
    }

    MyDio().query(qData, (response, hasError) {
      if (!hasError) {
        GoodsBeanEntity entity =
            GoodsBeanEntity().fromJson(json.decode(response.data.toString()));
        container.clear();
        container.addAll(entity.data.data);
      }
      queryAd();
    }, (error) {
      queryAd();
    });
  }

  void onRefresh() {
    page = 1;
    if (pageIndex == 1) {
      initTabs();
      findAStore();
    } else {
      storeType();
      checkPublicStores();
    }
  }

  void onLoading() {
    page++;
    if (pageIndex == 1) {
      findAStore();
    } else {
      checkPublicStores();
    }
  }

  Future<void> initTabs() async {
    List<CommodityCategoryBeanData> commodityCategoryBeanData = [];
    MyDio().query({
      "key": "commodity_category",
      "filters": {},
      "dims": [
        "name",
      ]
    }, (response, hasError) {
      if (!hasError) {
        CommodityCategoryBeanEntity entity = CommodityCategoryBeanEntity()
            .fromJson(json.decode(response.data.toString()));
        commodityCategoryBeanData = entity.data;
        tabs.clear();
        tabs.add('全部');
        commodityCategoryBeanData.forEach((element) {
          tabs.insert(1, element.name);
        });
        setState(() {});
      } else {
        return commodityCategoryBeanData;
      }
    }, (error) {
      return commodityCategoryBeanData;
    });
  }

  findAStore() {
    MyDio().query({
      "key": "shop_user",
      "filters": {
        "or": true,
        "conditions": [
          "role!=$shopUserOwner",
          "user_uid==${MyCookie().getUID()}",
          "review_state==1"
        ],
        "filters": [
          {
            "conditions": [
              "role==$shopUserOwner",
              "user_uid==${MyCookie().getUID()}"
            ]
          }
        ]
      },
      "dims": shopUserDims,
      "paging": [1, 20000]
    }, (response, hasError) {
      if (!hasError) {
        MyShopBeanEntity entity =
            MyShopBeanEntity().fromJson(json.decode(response.data.toString()));
        shops = entity.data.data;
        var shopUID = [];
        shops.forEach((element) {
          shopUID.add(element.shopUid);
        });
        getGoods(shopUID);
      }
    }, (error) {});
  }

  queryAd() {
    MyDio().query({
      "key": "ad",
      "filters": {
        "conditions": ['on_show == true']
      },
      "dims": adDims,
      "paging": [page, 2]
    }, (response, hasError) {
      if (!hasError) {
        AdBeanEntity entity =
            AdBeanEntity().fromJson(json.decode(response.data.toString()));
        container.addAll(entity.data.data);
        container.shuffle();
      }
      if (page == 1) {
        data.clear();
        puShop.clear();
      }
      if (pageIndex == 1) {
        data.addAll(container);
      } else {
        puShop.addAll(container);
      }
      setState(() {});
      endRe(_reController);
    }, (error) {
      if (page == 1) {
        data.clear();
      }
      data.addAll(container);
      setState(() {});
      endRe(_reController);
    });
  }

  void checkPublicStores() {
    var conditions = ['private==false', 'state == $shopStateNormal'];
    if (selectedIndex != 0) {
      conditions.add("category == ${tabs[selectedIndex]}");
    }
    if (_description.text.isNotEmpty) {
      conditions.add('name LIKE ${_description.text.toString()}');
    }
    MyDio().query({
      "key": "shop",
      "filters": {"conditions": conditions},
      "dims": shopDims,
      "paging": [page, 20]
    }, (response, hasError) {
      if (!hasError) {
        StoreBeanEntity entity =
            StoreBeanEntity().fromJson(json.decode(response.data.toString()));
        container.clear();
        container.addAll(entity.data.data);
      }
      queryAd();
    }, (error) {
      queryAd();
    });
  }

  void storeType() {
    List<CommodityCategoryBeanData> commodityCategoryBeanData = [];
    MyDio().query({
      "key": "shop_category",
      "filters": {},
      "dims": [
        "name",
      ]
    }, (response, hasError) {
      if (!hasError) {
        CommodityCategoryBeanEntity entity = CommodityCategoryBeanEntity()
            .fromJson(json.decode(response.data.toString()));
        commodityCategoryBeanData = entity.data;
        tabs.clear();
        tabs.add('全部');
        commodityCategoryBeanData.forEach((element) {
          tabs.insert(1, element.name);
        });
        setState(() {});
      }
    }, (error) {});
  }

  body() {
    if (pageIndex == 1) {
      return body1();
    } else if (pageIndex == 0) {
      return body2();
    }
  }

  body1() {
    if (data.length == 0) {
      return SingleChildScrollView(child: noData());
    } else {
      return GridView.builder(
          controller: _controller,
          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
              crossAxisCount: 2,
              childAspectRatio: 164 / 261,
              mainAxisSpacing: 8,
              crossAxisSpacing: 8),
          itemCount: data.length,
          padding: EdgeInsets.only(left: 14, right: 14, top: 14, bottom: 65),
          itemBuilder: (context, index) {
            return MyViews().getGoodsItem(data[index], context);
          });
    }
  }

  body2() {
    if (puShop.length == 0) {
      return SingleChildScrollView(child: noData());
    } else {
      return ListView.builder(
        controller: _controller,
        itemBuilder: (BuildContext context, int index) {
          return MyViews().pubShopItem(puShop[index], context);
        },
        itemCount: puShop.length,
        padding: EdgeInsets.all(10),
      );
    }
  }
}