import 'dart:io';
import 'dart:math';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:image_picker/image_picker.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:zhiying_base_widget/pages/feedback_page/bloc/feedback_bloc.dart';
import 'package:zhiying_base_widget/pages/feedback_page/bloc/feedback_repository.dart';
import 'package:zhiying_base_widget/pages/feedback_page/feedback_record_page.dart';
import 'package:zhiying_base_widget/pages/feedback_page/model/feedback_model.dart';
import 'package:zhiying_comm/zhiying_comm.dart';
import 'package:zhiying_base_widget/pages/feedback_page/widgets/feedback_image.dart';
import 'package:zhiying_base_widget/pages/feedback_page/widgets/feedback_tab_widget.dart';
import 'package:zhiying_base_widget/widgets/others/action_selected_alert/action_selected_alert.dart';
import 'package:zhiying_comm/util/log/let_log.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'bloc/feedback_bloc.dart';
import 'bloc/feedback_repository.dart';
import 'bloc/feedback_state.dart';
import 'bloc/feedback_event.dart';
import 'package:fluttertoast/fluttertoast.dart';

///
/// 意见反馈
///
class FeedbackPage extends StatefulWidget {
  final Map<String, dynamic> data;

  FeedbackPage(this.data);

  @override
  _FeedbackPageState createState() => _FeedbackPageState();
}

class _FeedbackPageState extends State<FeedbackPage> {
  @override
  Widget build(BuildContext context) {
    return BlocProvider<FeedbackBloc>(
      create: (_) => FeedbackBloc(FeedBackRepository())..add(FeedbackInitEvent()),
      child: _FeedbackPageContainer(),
    );
  }
}

class _FeedbackPageContainer extends StatefulWidget {
  @override
  __FeedbackPageContainerState createState() => __FeedbackPageContainerState();
}

class __FeedbackPageContainerState extends State<_FeedbackPageContainer> {
  List<File> _images = List();
  bool _submitable = false;
  TextEditingController _feedback;

  TextEditingController _title;

  // 是否上传中
  bool isUpLoading = false;

  @override
  void initState() {
    _feedback = TextEditingController();
    _title = TextEditingController();
    super.initState();
  }

  @override
  void dispose() {
    _feedback?.dispose();
    _title?.dispose();
    super.dispose();
  }

  /// 选择图片
  void _onAddImage() async {
    if (_images.length >= 4) {
      Fluttertoast.showToast(msg: '最多上传4张图片');
      return;
    }

    var status = await Permission.photos.status;
    if (status != PermissionStatus.granted) {
      status = await Permission.photos.request();
    }
    if (status == PermissionStatus.denied) {
      Fluttertoast.showToast(msg: '暂无权限，图片选择失败');
      return null;
    }

    final picker = ImagePicker();
    PickedFile file;
    int index = await showModalBottomSheet(
        context: context,
        builder: (context) {
          return ActionSelectedAlert(
            // title: '拍照/选择图片',
            actions: ['拍照', '从相册选择图片'],
          );
        },
        isScrollControlled: false,
        backgroundColor: Colors.transparent);
    if (index != null) {
      if (index == 0) {
        file = await picker.getImage(source: ImageSource.camera);
      } else {
        file = await picker.getImage(source: ImageSource.gallery);
      }

      if (file == null) return;

      if (_images.length <= 4) {
        setState(() {
          _images.add(File(file.path));
        });
      } else {
        Fluttertoast.showToast(msg: '最多只能选择4张');
      }

      // File resultFile = await EncodeUtil.compressImage(file, 800);
    }
  }

  @override
  Widget build(BuildContext context) {
    return BlocConsumer<FeedbackBloc, FeedbackState>(
      listener: (context, state) {},
      buildWhen: (prev, current) {
        /// 保存成功
        if (current is FeedbackSaveSuccessState) {
          Fluttertoast.showToast(msg: '反馈成功~');
          Navigator.pop(context);
          return false;
        }
        if (current is FeedbackSaveErrorState) {
          Fluttertoast.showToast(msg: '反馈失败~');
          setState(() {
            isUpLoading = false;
          });
          return false;
        }
        return true;
      },
      builder: (context, state) {
        if (state is FeedbackLoadedState) {
          return _getMainWidget(state?.model);
        }
        return _getEmptyWidget();
      },
    );
  }

  /// 有数据
  Widget _getMainWidget(FeedbackModel model) {
    return Scaffold(
      resizeToAvoidBottomInset: false,
      appBar: _createNav(model),
      body: GestureDetector(
        onTap: () {
          FocusScope.of(context).requestFocus(FocusNode());
        },
        child: SafeArea(
          child: Column(
            children: <Widget>[
              Expanded(
                child: SingleChildScrollView(
                  child: Column(
                    children: <Widget>[
                      Container(
                        width: double.infinity,
                        margin: EdgeInsets.only(top: 10, bottom: 10, left: 12.5, right: 12.5),
                        padding: EdgeInsets.all(12.5),
                        decoration: BoxDecoration(color: Colors.white, borderRadius: BorderRadius.circular(7.5)),
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          mainAxisAlignment: MainAxisAlignment.start,
                          children: <Widget>[
                            _createTitle(model),
                            _createUpload(model),
                            _createSubmit(model),
                          ],
                        ),
                      )
                    ],
                  ),
                ),
              ),
              Center(
                child: GestureDetector(
                  behavior: HitTestBehavior.opaque,
                  onTap: () => RouterUtil.route(model, model.toJson(), context),
                  child: Container(
                    width: 120,
                    height: 30,
                    margin: EdgeInsets.all(10),
                    decoration: BoxDecoration(
                      color: HexColor.fromHex(model?.feedbackListBtnBgColor ?? '#FFFFFF'),
                      borderRadius: BorderRadius.circular(15),
                      border: Border.all(color: HexColor.fromHex(model?.feedbackListBtnBorderColor ?? '#D1D1D1'), width: 0.5),
                    ),
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      crossAxisAlignment: CrossAxisAlignment.center,
                      children: <Widget>[
                        Padding(
                          padding: EdgeInsets.only(right: 6),
                          child: CachedNetworkImage(
                            imageUrl: model?.feedbackListBtnIcon ?? '',
                            width: 16.5,
                          ),
                        ),
                        Text(
                          model?.feedbackListBtnText ?? '反馈记录',
                          style: TextStyle(fontSize: 13, color: HexColor.fromHex(model?.feedbackListBtnTextColor ?? '#333333'), fontWeight: FontWeight.bold),
                        )
                      ],
                    ),
                  ),
                ),
              ),
              const SizedBox(height: 25),
            ],
          ),
        ),
      ),
    );
  }

  /// 没数据
  Widget _getEmptyWidget() {
    return Scaffold(
      resizeToAvoidBottomInset: false,
      appBar: _createNav(null),
      body: Container(),
    );
  }

  /// 导航栏
  Widget _createNav(FeedbackModel mode) {
    return CupertinoNavigationBar(
      border: Border(
        bottom: BorderSide(
          width: 0.0, // One physical pixel.
          style: BorderStyle.none,
        ),
      ),
      backgroundColor: HexColor.fromHex(mode?.appBarBgColor ?? '#FFFFFF'),
      leading: Navigator.canPop(context)
          ? GestureDetector(
              child: Container(
                padding: EdgeInsets.zero,
                child: Icon(
                  Icons.arrow_back_ios,
                  size: 20,
                ),
              ),
              onTap: () {
                if (Navigator.canPop(context)) {
                  Navigator.pop(context);
                }
              },
            )
          : Container(),
      middle: Text(
        mode?.appBarName ?? '意见反馈',
        style: TextStyle(
          fontSize: 15,
          color: HexColor.fromHex(mode?.appBarNameColor ?? '#333333'),
        ),
      ),
    );
  }

  Widget _createTitle(FeedbackModel model) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      mainAxisAlignment: MainAxisAlignment.start,
      children: <Widget>[
        Text(
          model?.feedbackTitle ?? '反馈描述',
          style: TextStyle(
            fontSize: 14,
            color: Color(0xff333333),
            fontWeight: FontWeight.bold,
          ),
        ),
        const SizedBox(height: 2),

        /// 异常选项
        Padding(
          padding: EdgeInsets.only(top: 4, bottom: 4),
          child: Visibility(
            visible: !EmptyUtil.isEmpty(model?.feedbackTypes),
            child: Row(
              children: model.feedbackTypes
                  .map((e) => Expanded(
                          child: GestureDetector(
                        behavior: HitTestBehavior.opaque,
                        onTap: () {
                          setState(() {
                            model.feedbackTypes.forEach((element) {
                              element.isSelect = false;
                            });
                            e.isSelect = true;
                          });
                        },
                        child: Container(
                            margin: EdgeInsets.only(left: 2, right: 2),
                            height: 28,
                            child: Container(
                              decoration: BoxDecoration(
                                borderRadius: BorderRadius.circular(2.5),
                                border: Border.all(
                                  color: HexColor.fromHex(e.isSelect ? model?.feedbackTypeSelectedBorderColor : model?.feedbackTypeNoSelectedBorderColor),
                                  //e.isSelect ? Colors.redAccent : Color(0xffe7e7e7),
                                  width: 1,
                                ),
                              ),
                              child: Stack(
                                children: <Widget>[
                                  Center(
                                    child: Text(
                                      e.name ?? '',
                                      style: TextStyle(
                                          fontSize: 12,
                                          color: HexColor.fromHex(
                                              e.isSelect ? model?.feedbackTypeSelectedTextColor : model?.feedbackTypeNoSelectedTextColor) //e.isSelect ? Colors.redAccent : Color(0xff999999),
                                          ),
                                    ),
                                  ),
                                  Visibility(
                                    visible: e.isSelect,
                                    child: Align(
                                      alignment: Alignment.bottomRight,
                                      child: CachedNetworkImage(
                                        imageUrl: model?.feedbackTypeSelectedBorderIcon,
                                        width: 10,
                                      ),
                                    ),
                                  )
                                ],
                              ),
                            )),
                      )))
                  .toList(),
            ),
          ),
        ),

        // 标题
        Container(
          height: 32.5,
          margin: EdgeInsets.only(left: 2, right: 2, top: 4, bottom: 4),
          child: CupertinoTextField(
            controller: _title,
            textAlignVertical: TextAlignVertical.center,
            style: TextStyle(fontSize: 12, color: Color(0xff333333)),
            maxLines: 1,
            placeholder: model?.feedbackInputHintText ?? '请输入反馈标题（最多15个字）',
            placeholderStyle: TextStyle(
              fontSize: 12,
              color: HexColor.fromHex(model?.feedbackInputHintTextColor ?? '#999999'),
            ),
            decoration: BoxDecoration(color: Color(0xfff9f9f9), borderRadius: BorderRadius.circular(7.5)),
            onChanged: (value) {
              if (value == null || value == '' || EmptyUtil.isEmpty(_feedback?.text?.toString()?.trim())) {
                _submitable = false;
              } else {
                _submitable = true;
              }
              setState(() {});
            },
          ),
        ),

        // 内容
        Container(
          height: 118,
          margin: EdgeInsets.only(left: 2, right: 2, top: 4, bottom: 4),
          child: CupertinoTextField(
            controller: _feedback,
            textAlignVertical: TextAlignVertical.top,
            style: TextStyle(fontSize: 12, color: Color(0xff333333)),
            maxLines: null,
            placeholder: model?.feedbackInputContentHintText ?? '请输入您的意见（最多100个字）',
            placeholderStyle: TextStyle(
              fontSize: 12,
              color: HexColor.fromHex(model?.feedbackInputContentHintTextColor ?? '#999999'),
            ),
            decoration: BoxDecoration(color: Color(0xfff9f9f9), borderRadius: BorderRadius.circular(7.5)),
            onChanged: (value) {
              if (value == null || value == '' || EmptyUtil.isEmpty(_title?.text?.toString()?.trim())) {
                _submitable = false;
              } else {
                _submitable = true;
              }
              setState(() {});
            },
          ),
        ),
      ],
    );
  }

  Widget _createUpload(FeedbackModel model) {
    List<Widget> images = List();
    _images.forEach((file) {
      images.add(Container(
        margin: EdgeInsets.only(top: 4, bottom: 4, right: 8),
        width: 80,
        height: 80,
        child: FeedbackImageWidget(
          file: file,
          onDelete: () {
            setState(() {
              _images.remove(file);
            });
          },
        ),
      ));
    });
    if (images.length < 4) {
      images.add(GestureDetector(
        child: Container(
          margin: EdgeInsets.only(top: 4, bottom: 4),
          decoration: BoxDecoration(borderRadius: BorderRadius.circular(7.5), color: Color(0xfff9f9f9)),
          height: 80,
          width: 80,
          child: Icon(
            Icons.add,
            size: 60,
            color: Color(0xffd8d8d8),
          ),
        ),
        onTap: _onAddImage,
      ));
    }

    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        Row(
          children: <Widget>[
            Padding(
              padding: EdgeInsets.only(right: 10, top: 4, bottom: 4),
              child: Text(
                model?.feedbackUploadImageTitle ?? '上传图片',
                style: TextStyle(
                  fontSize: 14,
                  color: Color(0xff333333),
                  fontWeight: FontWeight.bold,
                ),
              ),
            ),
            Text(
              model?.feedbackUploadImageSubtitle ?? '最多上传4张，大小不超过1M/张',
              style: TextStyle(
                fontSize: 12,
                color: Color(0xff999999),
              ),
            ),
          ],
        ),
        // Row(
        //   children: images,
        // )
        Wrap(
          crossAxisAlignment: WrapCrossAlignment.center,
          textDirection: TextDirection.ltr,
          spacing: 0,
          runSpacing: 0,
          runAlignment: WrapAlignment.center,
          alignment: WrapAlignment.start,
          children: images,
        ),
      ],
    );
  }

  Widget _createSubmit(FeedbackModel model) {
    return GestureDetector(
      onTap: () {
        if (!_submitable) {
          return;
        }

        if(isUpLoading){
          // Fluttertoast.showToast(msg: '提交中...');
          return;
        }

        setState(() {
          isUpLoading = true;
        });

        Logger.debug('提交:${_feedback.text.toString()}');
        String selectId;
        model.feedbackTypes.forEach((element) {
          if (element.isSelect) {
            selectId = element.typeId;
          }
        });
        BlocProvider.of<FeedbackBloc>(context)
            .add(FeedbackSubmitEvent(model: {'title': _title?.text?.toString(), 'content': _feedback?.text?.toString(), 'type': selectId, 'files': _images}));
        // Fluttertoast.showToast(msg: '提交成功～');
        // Navigator.pop(context);
      },
      child: Container(
        margin: EdgeInsets.only(top: 24, bottom: 4),
        height: 45,
        decoration: BoxDecoration(
          color: HexColor.fromHex(_submitable ? model?.feedbackTypeSelectedBorderColor ?? '' : model?.feedbackPostBtnBgColor ?? ''),
          borderRadius: BorderRadius.circular(7.5),
        ),
        child: Center(
          child: Text(
            isUpLoading ? '提交意见...' : model?.feedbackPostBtnText ?? '提交意见',
            style: TextStyle(
              fontSize: 14,
              color: HexColor.fromHex(model?.feedbackPostBtnTextColor ?? '#FFFFFF'),
            ),
          ),
        ),
      ),
    );
  }
}