import 'dart:ui';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_mobx/flutter_mobx.dart';
import 'package:mobx/mobx.dart';
import 'package:cake_wallet/palette.dart';
import 'package:cake_wallet/routes.dart';
import 'package:cake_wallet/src/screens/auth/auth_page.dart';
import 'package:cake_wallet/src/widgets/address_text_field.dart';
import 'package:cake_wallet/src/widgets/primary_button.dart';
import 'package:cake_wallet/src/widgets/scollable_with_bottom_section.dart';
import 'package:cake_wallet/view_model/send/send_view_model.dart';
import 'package:cake_wallet/src/screens/base_page.dart';
import 'package:cake_wallet/generated/i18n.dart';
import 'package:cake_wallet/src/widgets/top_panel.dart';
import 'package:cake_wallet/src/widgets/alert_with_one_action.dart';
import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart';
import 'package:cake_wallet/src/screens/send/widgets/confirm_sending_alert.dart';
import 'package:cake_wallet/view_model/send/send_view_model_state.dart';
import 'package:cake_wallet/src/widgets/trail_button.dart';

// FIXME: Refactor this screen.

class SendPage extends BasePage {
  SendPage({@required this.sendViewModel});

  final SendViewModel sendViewModel;

  @override
  String get title => S.current.send_title;

  @override
  Color get backgroundLightColor => Palette.lavender;

  @override
  Color get backgroundDarkColor => PaletteDark.lightNightBlue;

  @override
  bool get resizeToAvoidBottomPadding => false;

  @override
  Widget trailing(context) => TrailButton(
      caption: S.of(context).clear, onPressed: () => sendViewModel.reset());

  @override
  Widget body(BuildContext context) => SendForm(sendViewModel: sendViewModel);
}

class SendForm extends StatefulWidget {
  SendForm({this.sendViewModel});

  final SendViewModel sendViewModel;

  @override
  State<StatefulWidget> createState() => SendFormState();
}

class SendFormState extends State<SendForm> {
  final _addressController = TextEditingController();
  final _cryptoAmountController = TextEditingController();
  final _fiatAmountController = TextEditingController();

  final _focusNode = FocusNode();

  bool _effectsInstalled = false;

  final _formKey = GlobalKey<FormState>();

  @override
  void initState() {
    _focusNode.addListener(() {
      if (!_focusNode.hasFocus && _addressController.text.isNotEmpty) {
        getOpenaliasRecord(context);
      }
    });

    super.initState();
  }

  Future<void> getOpenaliasRecord(BuildContext context) async {
//    final sendStore = Provider.of<SendStore>(context);
//    final isOpenalias =
//        await sendStore.isOpenaliasRecord(_addressController.text);
//
//    if (isOpenalias) {
//      _addressController.text = sendStore.recordAddress;
//
//      await showDialog<void>(
//          context: context,
//          builder: (BuildContext context) {
//            return AlertWithOneAction(
//                alertTitle: S.of(context).openalias_alert_title,
//                alertContent:
//                    S.of(context).openalias_alert_content(sendStore.recordName),
//                buttonText: S.of(context).ok,
//                buttonAction: () => Navigator.of(context).pop());
//          });
//    }
  }

  @override
  Widget build(BuildContext context) {
    _setEffects(context);

    return Container(
      color: Theme.of(context).backgroundColor,
      child: ScrollableWithBottomSection(
        contentPadding: EdgeInsets.only(bottom: 24),
        content: Column(
          children: <Widget>[
            TopPanel(
              color: Theme.of(context).accentTextTheme.title.backgroundColor,
              widget: Form(
                key: _formKey,
                child: Column(children: <Widget>[
                  AddressTextField(
                    controller: _addressController,
                    placeholder: 'Address',
                    //S.of(context).send_monero_address, FIXME: placeholder for btc and xmr address text field.
                    focusNode: _focusNode,
                    onURIScanned: (uri) {
                      var address = '';
                      var amount = '';

                      if (uri != null) {
                        address = uri.path;
                        amount = uri.queryParameters['tx_amount'];
                      } else {
                        address = uri.toString();
                      }

                      _addressController.text = address;
                      _cryptoAmountController.text = amount;
                    },
                    options: [
                      AddressTextFieldOption.qrCode,
                      AddressTextFieldOption.addressBook
                    ],
                    buttonColor: Theme.of(context).accentTextTheme.title.color,
                    validator: widget.sendViewModel.addressValidator,
                  ),
                  Padding(
                    padding: const EdgeInsets.only(top: 20),
                    child: TextFormField(
                        onChanged: (value) =>
                            widget.sendViewModel.setCryptoAmount(value),
                        style: TextStyle(
                            fontSize: 16.0,
                            color:
                                Theme.of(context).primaryTextTheme.title.color),
                        controller: _cryptoAmountController,
                        keyboardType: TextInputType.numberWithOptions(
                            signed: false, decimal: true),
//                          inputFormatters: [
//                            BlacklistingTextInputFormatter(
//                                RegExp('[\\-|\\ |\\,]'))
//                          ],
                        decoration: InputDecoration(
                            prefixIcon: Padding(
                              padding: EdgeInsets.only(top: 12),
                              child: Text('${widget.sendViewModel.currency.toString()}:',
                                  style: TextStyle(
                                    fontSize: 16,
                                    fontWeight: FontWeight.w500,
                                    color: Theme.of(context)
                                        .primaryTextTheme
                                        .title
                                        .color,
                                  )),
                            ),
                            suffixIcon: Padding(
                                padding: EdgeInsets.only(bottom: 5),
                                child: Container(
                                  height: 32,
                                  width: 32,
                                  margin: EdgeInsets.only(
                                      left: 12, bottom: 7, top: 4),
                                  decoration: BoxDecoration(
                                      color: Theme.of(context)
                                          .accentTextTheme
                                          .title
                                          .color,
                                      borderRadius:
                                          BorderRadius.all(Radius.circular(6))),
                                  child: InkWell(
                                    onTap: () => widget.sendViewModel.setAll(),
                                    child: Center(
                                      child: Text(S.of(context).all,
                                          textAlign: TextAlign.center,
                                          style: TextStyle(
                                              fontSize: 9,
                                              fontWeight: FontWeight.bold,
                                              color: Theme.of(context)
                                                  .primaryTextTheme
                                                  .caption
                                                  .color)),
                                    ),
                                  ),
                                )),
                            hintStyle: TextStyle(
                                fontSize: 16.0,
                                color: Theme.of(context)
                                    .primaryTextTheme
                                    .title
                                    .color),
                            hintText: '0.0000',
                            focusedBorder: UnderlineInputBorder(
                                borderSide: BorderSide(
                                    color: Theme.of(context).dividerColor,
                                    width: 1.0)),
                            enabledBorder: UnderlineInputBorder(
                                borderSide: BorderSide(
                                    color: Theme.of(context).dividerColor,
                                    width: 1.0))),
                        validator: widget.sendViewModel.amountValidator),
                  ),
                  Padding(
                    padding: const EdgeInsets.only(top: 20),
                    child: TextFormField(
                        onChanged: (value) =>
                            widget.sendViewModel.setFiatAmount(value),
                        style: TextStyle(
                            fontSize: 16.0,
                            color:
                                Theme.of(context).primaryTextTheme.title.color),
                        controller: _fiatAmountController,
                        keyboardType: TextInputType.numberWithOptions(
                            signed: false, decimal: true),
//                        inputFormatters: [
//                          BlacklistingTextInputFormatter(
//                              RegExp('[\\-|\\ |\\,]'))
//                        ],
                        decoration: InputDecoration(
                            prefixIcon: Padding(
                              padding: EdgeInsets.only(top: 12),
                              child: Text(
                                  '${widget.sendViewModel.fiat.toString()}:',
                                  style: TextStyle(
                                    fontSize: 16,
                                    fontWeight: FontWeight.w500,
                                    color: Theme.of(context)
                                        .primaryTextTheme
                                        .title
                                        .color,
                                  )),
                            ),
                            hintStyle: TextStyle(
                                fontSize: 16.0,
                                color: Theme.of(context)
                                    .primaryTextTheme
                                    .caption
                                    .color),
                            hintText: '0.00',
                            focusedBorder: UnderlineInputBorder(
                                borderSide: BorderSide(
                                    color: Theme.of(context).dividerColor,
                                    width: 1.0)),
                            enabledBorder: UnderlineInputBorder(
                                borderSide: BorderSide(
                                    color: Theme.of(context).dividerColor,
                                    width: 1.0)))),
                  ),
                  Padding(
                    padding: const EdgeInsets.only(top: 20),
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: <Widget>[
                        Text(S.of(context).send_estimated_fee,
                            style: TextStyle(
                              fontSize: 12,
                              fontWeight: FontWeight.w600,
                              color: Theme.of(context)
                                  .primaryTextTheme
                                  .title
                                  .color,
                            )),
                        Text(
                            '${widget.sendViewModel.estimatedFee} ${widget.sendViewModel.currency.toString()}',
                            style: TextStyle(
                              fontSize: 12,
                              fontWeight: FontWeight.w600,
                              color: Theme.of(context)
                                  .primaryTextTheme
                                  .title
                                  .color,
                            ))
                      ],
                    ),
                  )
                ]),
              ),
            ),
//            Padding(
//              padding: EdgeInsets.only(top: 32, left: 24, bottom: 24),
//              child: Row(
//                mainAxisAlignment: MainAxisAlignment.start,
//                children: <Widget>[
//                  Text(
//                    S.of(context).send_templates,
//                    style: TextStyle(
//                        fontSize: 18,
//                        fontWeight: FontWeight.w600,
//                        color:
//                            Theme.of(context).primaryTextTheme.caption.color),
//                  )
//                ],
//              ),
//            ),
//            Container(
//              height: 40,
//              width: double.infinity,
//              padding: EdgeInsets.only(left: 24),
//              child: Observer(builder: (_) {
//                final itemCount = sendTemplateStore.templates.length + 1;
//
//                return ListView.builder(
//                    scrollDirection: Axis.horizontal,
//                    itemCount: itemCount,
//                    itemBuilder: (context, index) {
//                      if (index == 0) {
//                        return GestureDetector(
//                          onTap: () => Navigator.of(context)
//                              .pushNamed(Routes.sendTemplate),
//                          child: Container(
//                            padding: EdgeInsets.only(right: 10),
//                            child: DottedBorder(
//                                borderType: BorderType.RRect,
//                                dashPattern: [8, 4],
//                                color: Theme.of(context)
//                                    .accentTextTheme
//                                    .title
//                                    .backgroundColor,
//                                strokeWidth: 2,
//                                radius: Radius.circular(20),
//                                child: Container(
//                                  height: 40,
//                                  width: 75,
//                                  padding: EdgeInsets.only(left: 10, right: 10),
//                                  alignment: Alignment.center,
//                                  decoration: BoxDecoration(
//                                    borderRadius:
//                                        BorderRadius.all(Radius.circular(20)),
//                                    color: Colors.transparent,
//                                  ),
//                                  child: Text(
//                                    S.of(context).send_new,
//                                    style: TextStyle(
//                                        fontSize: 14,
//                                        fontWeight: FontWeight.w600,
//                                        color: Theme.of(context)
//                                            .primaryTextTheme
//                                            .caption
//                                            .color),
//                                  ),
//                                )),
//                          ),
//                        );
//                      }
//
//                      index -= 1;
//
//                      final template = sendTemplateStore.templates[index];
//
//                      return TemplateTile(
//                          to: template.name,
//                          amount: template.amount,
//                          from: template.cryptoCurrency,
//                          onTap: () {
//                            _addressController.text = template.address;
//                            _cryptoAmountController.text = template.amount;
//                            getOpenaliasRecord(context);
//                          });
//                    });
//              }),
//            )
          ],
        ),
        bottomSectionPadding: EdgeInsets.only(left: 24, right: 24, bottom: 24),
        bottomSection: Observer(builder: (_) {
          return LoadingPrimaryButton(
              onPressed: () async {
                FocusScope.of(context).requestFocus(FocusNode());

                if (!_formKey.currentState.validate()) {
                  return;
                }

                await showDialog<void>(
                    context: context,
                    builder: (dialogContext) {
                      return AlertWithTwoActions(
                          alertTitle: S.of(context).send_creating_transaction,
                          alertContent: S.of(context).confirm_sending,
                          leftButtonText: S.of(context).send,
                          rightButtonText: S.of(context).cancel,
                          actionLeftButton: () async {
                            await Navigator.of(dialogContext)
                                .popAndPushNamed(Routes.auth, arguments:
                                    (bool isAuthenticatedSuccessfully,
                                        AuthPageState auth) {
                              if (!isAuthenticatedSuccessfully) {
                                return;
                              }

                              Navigator.of(auth.context).pop();
                              widget.sendViewModel.createTransaction();
                            });
                          },
                          actionRightButton: () => Navigator.of(context).pop());
                    });
              },
              text: S.of(context).send,
              color: Colors.blue,
              textColor: Colors.white,
              isLoading: widget.sendViewModel.state is TransactionIsCreating ||
                  widget.sendViewModel.state is TransactionCommitting,
              isDisabled: !widget.sendViewModel.isReadyForSend);
        }),
      ),
    );
  }

  void _setEffects(BuildContext context) {
    if (_effectsInstalled) {
      return;
    }

    reaction((_) => widget.sendViewModel.all, (bool all) {
      if (all) {
        _cryptoAmountController.text = S.current.all;
        _fiatAmountController.text = null;
      }
    });

    reaction((_) => widget.sendViewModel.fiatAmount, (String amount) {
      if (amount != _fiatAmountController.text) {
        _fiatAmountController.text = amount;
      }
    });

    reaction((_) => widget.sendViewModel.cryptoAmount, (String amount) {
      if (widget.sendViewModel.all && amount != S.current.all) {
        widget.sendViewModel.all = false;
      }

      if (amount != _cryptoAmountController.text) {
        _cryptoAmountController.text = amount;
      }
    });

    reaction((_) => widget.sendViewModel.address, (String address) {
      if (address != _addressController.text) {
        _addressController.text = address;
      }
    });

    _addressController.addListener(() {
      final address = _addressController.text;

      if (widget.sendViewModel.address != address) {
        widget.sendViewModel.address = address;
      }
    });

    reaction((_) => widget.sendViewModel.state, (SendViewModelState state) {
      if (state is SendingFailed) {
        WidgetsBinding.instance.addPostFrameCallback((_) {
          showDialog<void>(
              context: context,
              builder: (BuildContext context) {
                return AlertWithOneAction(
                    alertTitle: S.of(context).error,
                    alertContent: state.error,
                    buttonText: S.of(context).ok,
                    buttonAction: () => Navigator.of(context).pop());
              });
        });
      }

      if (state is TransactionCreatedSuccessfully) {
        WidgetsBinding.instance.addPostFrameCallback((_) {
          showDialog<void>(
              context: context,
              builder: (BuildContext context) {
                return ConfirmSendingAlert(
                    alertTitle: S.of(context).confirm_sending,
                    amount: S.of(context).send_amount,
                    amountValue:
                        widget.sendViewModel.pendingTransaction.amountFormatted,
                    fee: S.of(context).send_fee,
                    feeValue:
                        widget.sendViewModel.pendingTransaction.feeFormatted,
                    leftButtonText: S.of(context).ok,
                    rightButtonText: S.of(context).cancel,
                    actionLeftButton: () {
                      Navigator.of(context).pop();
                      widget.sendViewModel.commitTransaction();
                      showDialog<void>(
                          context: context,
                          builder: (BuildContext context) {
                            return Observer(builder: (_) {
                              final state = widget.sendViewModel.state;

                              if (state is TransactionCommitted) {
                                return Stack(
                                  children: <Widget>[
                                    Container(
                                      color: Theme.of(context).backgroundColor,
                                      child: Center(
                                        child: Image.asset(
                                            'assets/images/birthday_cake.png'),
                                      ),
                                    ),
                                    Center(
                                      child: Padding(
                                        padding: EdgeInsets.only(
                                            top: 220, left: 24, right: 24),
                                        child: Text(
                                          S.of(context).send_success,
                                          textAlign: TextAlign.center,
                                          style: TextStyle(
                                            fontSize: 22,
                                            fontWeight: FontWeight.bold,
                                            color: Theme.of(context)
                                                .primaryTextTheme
                                                .title
                                                .color,
                                            decoration: TextDecoration.none,
                                          ),
                                        ),
                                      ),
                                    ),
                                    Positioned(
                                        left: 24,
                                        right: 24,
                                        bottom: 24,
                                        child: PrimaryButton(
                                            onPressed: () =>
                                                Navigator.of(context).pop(),
                                            text: S.of(context).send_got_it,
                                            color: Colors.blue,
                                            textColor: Colors.white))
                                  ],
                                );
                              }

                              return Stack(
                                children: <Widget>[
                                  Container(
                                    color: Theme.of(context).backgroundColor,
                                    child: Center(
                                      child: Image.asset(
                                          'assets/images/birthday_cake.png'),
                                    ),
                                  ),
                                  BackdropFilter(
                                    filter: ImageFilter.blur(
                                        sigmaX: 3.0, sigmaY: 3.0),
                                    child: Container(
                                      decoration: BoxDecoration(
                                          color: Theme.of(context)
                                              .backgroundColor
                                              .withOpacity(0.25)),
                                      child: Center(
                                        child: Padding(
                                          padding: EdgeInsets.only(top: 220),
                                          child: Text(
                                            S.of(context).send_sending,
                                            textAlign: TextAlign.center,
                                            style: TextStyle(
                                              fontSize: 22,
                                              fontWeight: FontWeight.bold,
                                              color: Theme.of(context)
                                                  .primaryTextTheme
                                                  .title
                                                  .color,
                                              decoration: TextDecoration.none,
                                            ),
                                          ),
                                        ),
                                      ),
                                    ),
                                  )
                                ],
                              );
                            });
                          });
                    },
                    actionRightButton: () => Navigator.of(context).pop());
              });
        });
      }

      if (state is TransactionCommitted) {
        WidgetsBinding.instance.addPostFrameCallback((_) {
          _addressController.text = '';
          _cryptoAmountController.text = '';
        });
      }
    });

    _effectsInstalled = true;
  }
}