import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:city_pickers/city_pickers.dart';
import 'package:flutter_picker/flutter_picker.dart';

class SendExpressPage extends StatefulWidget {
  final Widget child;

  SendExpressPage({
    Key key,
    this.child
  }): super(key: key);

  _SendExpressPageState createState() => _SendExpressPageState();
}

class _SendExpressPageState extends State < SendExpressPage > with AutomaticKeepAliveClientMixin {

  ScrollController _scrollController = ScrollController();

  //组件自用字段-----------------------------
  GlobalKey _sendPhoneKey = GlobalKey();
  GlobalKey _getPhoneKey = GlobalKey();

  double tipWidth = 0;
  double tipHeight = 0;
  double tipPosX = 0;
  double tipPosY = 0;

  bool tipStatus = true;

  //请求字段-------------------------
  int sendCompanyId; //寄件公司Id
  String sendCompanyName; //寄件公司名称 不能为空
  String sendCompanyPhone; //寄件公司电话 不能为空
  String sendCompanyCode; //寄件公司编码 不能为空
  String sendCompanyProvinceName; //寄件公司省名称 不能为空
  String sendCompanyProvinceCode; //寄件公司省编码 不能为空
  String sendCompanyCityName; //寄件公司市名称 不能为空
  String sendCompanyCityCode; //寄件公司市编码 不能为空
  String sendCompanyAreaName; //寄件公司区名称 不能为空
  String sendCompanyAreaCode; //寄件公司区编码 不能为空
  String sendCompanyAddress; //寄件公司详细地址，不能为空
  int receiptCompanyId; //收件公司id
  String receiptCompanyPhone; //收件公司电话 不能为空
  String receiptCompanyName; //收件公司名称 不能为空
  String receiptCompanyProvinceName; //收件公司省名称 不能为空
  String receiptCompanyProvinceCode; //收件公司省编码 不能为空
  String receiptCompanyCityName; //收件公司市名称 不能为空
  String receiptCompanyCityCode; //收件公市编码 不能为空
  String receiptCompanyAreaName; //收件公区名称 不能为空
  String receiptCompanyAreaCode; //收件公司区编码 不能为空
  String receiptCompanyAddress; //收件公司地址详情 不能为空
  String goods; //商品名称不能为空
  int goodsQuantity; //商品数量 不能为空
  int goodsPackingId; //商品包装ID 
  int goodsCategoryId; //商品包装类别ID 
  int goodsPaymentMethod; //付款方式
  double goodsWeight; //商品重量 
  double goodsPriceProtection; //商品保价
  double goodsAgencyFund; //商品代收款
  String memo; //备注


  String sendPCA = ' ';//Text组件内容必须有空格，否则报null
  String getPCA = ' ';

  @override
  void initState() {
    super.initState();
    _scrollController.addListener(() {
      if (!tipStatus) {
        setState(() {
          tipStatus = true;
        });
      }
      print('滚动了');
      if (_scrollController.position.pixels == _scrollController.position.maxScrollExtent) {}
    });
  }

  @override
  bool get wantKeepAlive => true;

  @override
  Widget build(BuildContext context) {
    return Container(

      child: Scaffold(
        appBar: AppBar(
          title: Text('发件', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(36)), ),
          centerTitle: true,
          backgroundColor: Color.fromRGBO(64, 98, 254, 1),
        ),
        body:
        Stack(
          children: < Widget > [
            Container(
              color: Color.fromRGBO(246, 246, 254, 1),
              padding: EdgeInsets.fromLTRB(0, ScreenUtil.getInstance().setHeight(20), 0, ScreenUtil.getInstance().setHeight(20)),
              child: ListView(
                controller: _scrollController,
                children: < Widget > [
                  _sendInfo(context),
                  _getInfo(context),
                  _itemInfoWidget(),
                  _submitBtn()
                ],
              ),
            ),
            Positioned(
              top: tipPosY,
              left: tipPosX,
              child: Offstage(
                offstage: tipStatus,
                child: Container(
                  width: tipWidth,
                  height: ScreenUtil.getInstance().setHeight(450),
                  padding: EdgeInsets.only(left: ScreenUtil.getInstance().setWidth(30)),
                  decoration: BoxDecoration(
                    color: Color.fromRGBO(244, 248, 251, 1),
                  ),
                  child: ListView(
                    children: < Widget > [
                      _tipItem(),
                      _tipItem(),
                    ],
                  ),
                ),
              )
            )
          ],
        ),
        resizeToAvoidBottomPadding: false //键盘弹出，页面不跟随向上滑动,防止出现溢出错误
      ),
    );
  }

  Widget _sendInfo(BuildContext context) {
    return Container(
      color: Colors.white,
      margin: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(20)),
      child: Column(
        children: < Widget > [
          _titleWidget('lib/images/icon_send.png', '发件信息'),
          _underLine(),
          _inputWiget('电话', 'sendPhone'),
          _contentWiget('企业编码', 'send', true),
          _contentWiget('企业名称', 'send', true),
          _cityWiget('城市/区域', context, 'send'),
          _lastContentWiget('详细地址', 'send')
        ],
      )
    );
  }

  Widget _getInfo(BuildContext context) {
    return Container(
      color: Colors.white,
      margin: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(20)),
      child: Column(
        children: < Widget > [
          _titleWidget('lib/images/icon_shoujian.png', '收件信息'),
          _underLine(),
          _inputWiget('电话', 'getPhone'),
          //_contentWiget('企业编码', 'get', true),
          _contentWiget('企业名称', 'get', true),
          _cityWiget('城市/区域', context, 'get'),
          _lastContentWiget('详细地址', 'get')
        ],
      )
    );
  }

  Widget _itemInfoWidget() {
    return Container(
      child: Container(
        color: Colors.white,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: < Widget > [
            _titleWidget('lib/images/icon_huowu.png', "货物信息"),
            _underLine(),
            _contentWiget("货物名称", 'goods', true),
            _contentWiget("数量", 'goods'),
            _contentWiget("运费", 'goods'),
            _contentWiget("代收", 'goods'),
            _contentWiget("保价", 'goods'),
            _contentWiget("重量", 'goods'),
            _packageType(),
            _descWidget()
          ],
        ),
      )
    );
  }


  Widget _titleWidget(String iconUrl, String str) {
    return Container(
      height: ScreenUtil.getInstance().setHeight(90),
      padding: EdgeInsets.only(left: ScreenUtil.getInstance().setWidth(30)),
      child: Center(
        child: Row(
          mainAxisAlignment: MainAxisAlignment.start,
          children: < Widget > [
            Padding(
              padding: EdgeInsets.only(right: ScreenUtil.getInstance().setHeight(20)),
              child: Image.asset(
                iconUrl,
                width: ScreenUtil.getInstance().setWidth(40),
                height: ScreenUtil.getInstance().setHeight(40),
              )
            ),
            Text(str, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(32)), )
          ],
        ),
      ),
    );
  }

  Widget _underLine() {
    return Container(
      color: Color.fromRGBO(223, 223, 223, 1),
      height: ScreenUtil.getInstance().setHeight(1),
    );
  }

  Widget _inputWiget(String key, String tab) {
    return Padding(
      key: tab == 'sendPhone' ? _sendPhoneKey : _getPhoneKey,
      padding: EdgeInsets.only(left: ScreenUtil.getInstance().setWidth(30)),
      child: Column(
        children: < Widget > [
          SizedBox(
            height: ScreenUtil.getInstance().setHeight(89),
            child: Center(
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: < Widget > [
                  Expanded(
                    flex: 0,
                    child: Text(key, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
                  ),
                  Expanded(
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.end,
                      children: < Widget > [
                        //Text('${value}', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(136, 136, 136, 1)), ),
                        SizedBox(
                          width: ScreenUtil.getInstance().setWidth(500),
                          child: TextField(
                            keyboardType: TextInputType.number,
                            textAlign: TextAlign.end,
                            decoration: InputDecoration(
                              border: InputBorder.none
                            ),
                            onChanged: ((value) {
                              if (tab == 'sendPhone') {
                                if (value.length >= 4) {
                                  RenderObject sendPhoneObj = _sendPhoneKey.currentContext.findRenderObject();
                                  setState(() {
                                    tipWidth = sendPhoneObj.paintBounds.size.width;
                                    tipHeight = sendPhoneObj.paintBounds.size.height;
                                    tipPosX = sendPhoneObj.getTransformTo(null).getTranslation().x;
                                    tipPosY = sendPhoneObj.getTransformTo(null).getTranslation().y - ScreenUtil.getInstance().setHeight(90);
                                    tipStatus = false;
                                  });
                                } else {
                                  setState(() {
                                    tipStatus = true;
                                  });
                                }

                                // print(tipWidth);
                                // print(tipHeight);
                                // print(tipPosX);
                                // print(tipPosY);
                              } else if (tab == 'getPhone') {
                                if (value.length >= 4) {
                                  RenderObject sendPhoneObj = _getPhoneKey.currentContext.findRenderObject();
                                  setState(() {
                                    tipWidth = sendPhoneObj.paintBounds.size.width;
                                    tipHeight = sendPhoneObj.paintBounds.size.height;
                                    tipPosX = sendPhoneObj.getTransformTo(null).getTranslation().x;
                                    tipPosY = sendPhoneObj.getTransformTo(null).getTranslation().y - ScreenUtil.getInstance().setHeight(90);
                                    tipStatus = false;
                                  });
                                } else {
                                  setState(() {
                                    tipStatus = true;
                                  });
                                }

                                // print(tipWidth);
                                // print(tipHeight);
                                // print(tipPosX);
                                // print(tipPosY);
                              }
                            }),
                            onEditingComplete: () {
                              setState(() {
                                FocusScope.of(context).requestFocus(FocusNode());
                                tipStatus = true;
                              });
                            },

                          ),
                        ),
                        Icon(Icons.keyboard_arrow_right, color: Color.fromRGBO(199, 199, 204, 1), )
                      ],
                    )
                  )
                ],
              ),
            )
          ),
          Expanded(
            flex: 0,
            child: _underLine()
          )
        ],
      )
    );
  }


  Widget _contentWiget(String key, String type, [bool keyboardType = false]) { //false是数字键盘
    return Padding(
      padding: EdgeInsets.only(left: ScreenUtil.getInstance().setWidth(30)),
      child: Column(
        children: < Widget > [
          SizedBox(
            height: ScreenUtil.getInstance().setHeight(89),
            child: Center(
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: < Widget > [
                  Expanded(
                    flex: 0,
                    child: Text(key, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
                  ),
                  Expanded(
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.end,
                      children: < Widget > [
                        SizedBox(
                          width: ScreenUtil.getInstance().setWidth(500),
                          child: TextField(
                            keyboardType: keyboardType ? TextInputType.text : TextInputType.number,
                            textAlign: TextAlign.end,
                            decoration: InputDecoration(
                              border: InputBorder.none
                            ),
                            onChanged: (value) {
                              if (type == 'send') {
                                if (key == '企业编码') {
                                  setState(() {
                                    sendCompanyCode = value;
                                  });
                                } else if (key == '企业名称') {
                                  setState(() {
                                    sendCompanyName = value;
                                  });
                                }
                              } else if (type == 'get') {
                                if (key == '企业编码') {
                                  setState(() {
                                    sendCompanyCode = value;
                                  });
                                } else if (key == '企业名称') {
                                  setState(() {
                                    receiptCompanyName = value;
                                  });
                                }
                              } else {
                                if (key == '货物名称') {
                                  goods = value;
                                } else if (key == '数量') {
                                  goodsQuantity = int.parse(value);
                                } else if (key == '运费') {

                                } else if (key == '代收') {
                                  goodsAgencyFund = double.parse(value);
                                } else if (key == '保价') {
                                  goodsPriceProtection = double.parse(value);
                                } else if (key == '重量') {
                                  goodsWeight = double.parse(value);
                                }
                              }
                            },
                          ),
                        ),

                        Icon(Icons.keyboard_arrow_right, color: Color.fromRGBO(199, 199, 204, 1), )
                      ],
                    )
                  )
                ],
              ),
            )
          ),
          Expanded(
            flex: 0,
            child: _underLine()
          )
        ],
      )
    );
  }

  Widget _cityWiget(String key, BuildContext context, String type) {

    return
    GestureDetector(
      child: Padding(
        padding: EdgeInsets.only(left: ScreenUtil.getInstance().setWidth(30)),
        child: Column(
          children: < Widget > [
            SizedBox(
              height: ScreenUtil.getInstance().setHeight(89),
              child: Center(
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: < Widget > [
                    Expanded(
                      flex: 0,
                      child: Text(key, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
                    ),
                    Expanded(
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.end,
                        children: < Widget > [
                          //Text('${value}', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(136, 136, 136, 1)), ),
                          SizedBox(
                            width: ScreenUtil.getInstance().setWidth(500),
                            child: Text(type == 'send' ? sendPCA : getPCA, textAlign: TextAlign.end, overflow: TextOverflow.ellipsis, )
                          ),
                          Icon(Icons.keyboard_arrow_right, color: Color.fromRGBO(199, 199, 204, 1), )
                        ],
                      )
                    )
                  ],
                ),
              )
            ),
            Expanded(
              flex: 0,
              child: _underLine()
            )
          ],
        )
      ),
      onTap: () {
        getCity(context).then((resp) {
          if (resp == null) {
            return;
          }
          print(resp.toString());
          setState(() {
            if (type == 'send') {
              sendPCA = resp.provinceName + ' ' + resp.cityName + ' ' + ' ' + resp.areaName;
              sendCompanyProvinceName = resp.provinceName;
              sendCompanyProvinceCode = resp.provinceId;
              sendCompanyCityName = resp.cityName;
              sendCompanyCityCode = resp.cityId;
              sendCompanyAreaName = resp.areaName;
              sendCompanyAreaCode = resp.areaId;
            } else {
              getPCA = resp.provinceName + ' ' + resp.cityName + ' ' + ' ' + resp.areaName;
              receiptCompanyProvinceName = resp.provinceName;
              receiptCompanyProvinceCode = resp.provinceId;
              receiptCompanyCityName = resp.cityName;
              receiptCompanyCityCode = resp.cityId;
              receiptCompanyAreaName = resp.areaName;
              receiptCompanyAreaCode = resp.areaId;
            }
          });

          //print(value);
        });
      },
    );
  }

  Widget _lastContentWiget(String key, String type) {
    return Padding(
      padding: EdgeInsets.only(left: ScreenUtil.getInstance().setWidth(30)),
      child: SizedBox(
        height: ScreenUtil.getInstance().setHeight(89),
        child: Center(
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: < Widget > [
              Expanded(
                flex: 0,
                child: Text(key, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
              ),
              Expanded(
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.end,
                  children: < Widget > [
                    //Text('${value}', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(136, 136, 136, 1)), ),
                    SizedBox(
                      width: ScreenUtil.getInstance().setWidth(500),
                      child: TextField(
                        //keyboardType: TextInputType.number,
                        textAlign: TextAlign.end,
                        decoration: InputDecoration(
                          border: InputBorder.none
                        ),
                        onChanged: (value) {
                          if (type == 'send') {
                            setState(() {
                              sendCompanyAddress = value;
                            });
                          } else {
                            setState(() {
                              receiptCompanyAddress = value;
                            });
                          }
                        },
                      ),
                    ),

                    Icon(Icons.keyboard_arrow_right, color: Color.fromRGBO(199, 199, 204, 1), )
                  ],
                )
              )
            ],
          ),
        )
      )
    );
  }

  Widget _descWidget() {
    return
    Container(
      padding: EdgeInsets.all(ScreenUtil.getInstance().setWidth(30)),
      //child: Text(str, maxLines: 100, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
      child: TextField(
        maxLines: 3,
        decoration: InputDecoration(
          border: InputBorder.none,
          hintText: "请输入备注内容"
        ),
        onChanged: (value) {
          setState(() {
            memo = value;
          });
        },
      ),
    );
  }

  Widget _submitBtn() {
    return GestureDetector(
      child: Container(
        margin: EdgeInsets.fromLTRB(ScreenUtil.getInstance().setWidth(30), ScreenUtil.getInstance().setWidth(50), ScreenUtil.getInstance().setWidth(30), ScreenUtil.getInstance().setWidth(40)),
        height: ScreenUtil.getInstance().setHeight(88),
        decoration: BoxDecoration(
          borderRadius: BorderRadius.all(Radius.circular(4)),
          color: Color.fromRGBO(37, 102, 242, 1),
        ),
        child: Center(
          child: Text("提交", style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(32), color: Colors.white), ),
        ),
      ),
      onTap: () {
        print('提交');
      },
    );
  }
  Future getCity(context) async {
    Result result = await CityPickers.showCityPicker(
      context: context,
    );
    return result;
  }

  Widget _tipItem() {
    return Container(
      child: Column(
        children: < Widget > [
          Container(
            height: ScreenUtil.getInstance().setHeight(89),
            child: Center(
              child: Row(
                mainAxisAlignment: MainAxisAlignment.start,
                children: < Widget > [
                  Padding(
                    padding: EdgeInsets.only(right: ScreenUtil.getInstance().setWidth(50)),
                    child: Text("15901462275", style: TextStyle(
                      fontSize: ScreenUtil.getInstance().setSp(28),
                      color: Color.fromRGBO(74, 74, 74, 1)
                    ), )
                  ),
                  SizedBox(
                    width: ScreenUtil.getInstance().setWidth(185),
                    child: Text('WX11042',
                      textAlign: TextAlign.left,
                      style: TextStyle(
                        fontSize: ScreenUtil.getInstance().setSp(28),
                        color: Color.fromRGBO(155, 155, 155, 1)
                      ), ),
                  ),
                  Text('天华盛业',
                    textAlign: TextAlign.left,
                    overflow: TextOverflow.ellipsis,
                    style: TextStyle(
                      fontSize: ScreenUtil.getInstance().setSp(28),
                      color: Color.fromRGBO(155, 155, 155, 1)
                    ),
                  )
                ],
              ),
            ),
          ),
          _underLine()
        ],
      ),
    );
  }

  Widget _packageType() {
    return Padding(
      padding: EdgeInsets.only(left: ScreenUtil.getInstance().setWidth(30)),
      child: Column(
        children: < Widget > [
          InkWell(
            child: SizedBox(
              height: ScreenUtil.getInstance().setHeight(89),
              child: Center(
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: < Widget > [
                    Expanded(
                      flex: 0,
                      child: Text('包装类型', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(74, 74, 74, 1)), ),
                    ),
                    Expanded(
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.end,
                        children: < Widget > [
                          //Text('${value}', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(136, 136, 136, 1)), ),
                          SizedBox(
                            width: ScreenUtil.getInstance().setWidth(500),
                            child: Text('纸箱', textAlign: TextAlign.end, )
                          ),
                          Icon(Icons.keyboard_arrow_right, color: Color.fromRGBO(199, 199, 204, 1), )
                        ],
                      )
                    )
                  ],
                ),
              )
            ),
            onTap: () {
              showPickerModal(context);
            },
          ),
          Expanded(
            flex: 0,
            child: _underLine()
          )
        ],
      )
    );

  }

  showPickerModal(BuildContext context) {
    new Picker(
      adapter: PickerDataAdapter < String > (pickerdata: ['纸箱', '木箱']),
      height: ScreenUtil.getInstance().setHeight(450),
      confirmText: '确定',
      confirmTextStyle: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(64, 98, 254, 1)),
      cancelText: '取消',
      cancelTextStyle: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(153, 153, 153, 1)),
      headercolor: Color.fromRGBO(245, 245, 245, 1),
      itemExtent: ScreenUtil.getInstance().setHeight(80),
      textStyle: TextStyle(fontSize: ScreenUtil.getInstance().setSp(30), color: Color.fromRGBO(42, 42, 42, 1)),
      changeToFirst: true,
      hideHeader: false,
      onConfirm: (Picker picker, List value) {
        // setState(() {
        //   _siteName = stationObj.data[value[0]].name;
        // });
        // setKey('stationId', stationObj.data[value[0]].id.toString());
      }
    ).showModal(this.context); //_scaffoldKey.currentState);
  }
}