import 'dart:math';

import 'package:hash_wallet/di.dart';
import 'package:hash_wallet/generated/i18n.dart';
import 'package:hash_wallet/new-ui/viewmodels/lightning_username/lightning_username_bloc.dart';
import 'package:hash_wallet/new-ui/widgets/new_primary_button.dart';
import 'package:hash_wallet/new-ui/widgets/receive_page/receive_top_bar.dart';
import 'package:hash_wallet/src/widgets/hash_image_widget.dart';
import 'package:hash_wallet/themes/core/theme_store.dart';
import 'package:cw_core/generate_name.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_svg/flutter_svg.dart';

class LightningUsernamePage extends StatefulWidget {
  LightningUsernamePage({super.key, required this.isSetup, required this.themeStore, required this.lightningUsernameBloc});

  final bool isSetup;

  final ThemeStore themeStore;
  late final bool isLightMode = !(themeStore.currentTheme.isDark);
  final LightningUsernameBloc lightningUsernameBloc;

  @override
  State<LightningUsernamePage> createState() => _LightningUsernamePageState();
}

class _LightningUsernamePageState extends State<LightningUsernamePage> {
  late bool _editMode;
  final TextEditingController _controller = TextEditingController();

  @override
  void initState() {
    super.initState();
    _editMode = widget.isSetup;
  }

  @override
  Widget build(BuildContext context) {
    return BlocProvider(
      create: (context) => widget.lightningUsernameBloc,
      child: BlocConsumer<LightningUsernameBloc, LightningUsernameState>(
        listener: (context, state) {
          if (state is LightningUsernameSaved) {
            if (widget.isSetup) {
              Navigator.of(context).popUntil((route) => route.isFirst);
            } else {
              Navigator.of(context).pop();
            }
          }
          if (state is LightningUsernameInitial) {
            if (!widget.isSetup) {
              _controller.text = state.username;
            }
          }
        },
        builder: (context, state) {
          return Material(
            child: Container(
              decoration: BoxDecoration(color: Theme.of(context).colorScheme.surface),
              child: SafeArea(
                child: Column(
                  children: [
                    ModalTopBar(
                      title: "Lightning ${S.of(context).username}",
                      leadingIcon: Icon(Icons.arrow_back_ios_new),
                      onLeadingPressed: Navigator.of(context).pop,
                    ),
                    Expanded(
                      child: Column(
                        spacing: 24,
                        mainAxisSize: MainAxisSize.max,
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: [
                          AnimatedSwitcher(
                            duration: const Duration(milliseconds: 200),
                            child: _editMode
                                ? LightningUsernameEditor(
                                    isSetup: widget.isSetup,
                                    controller: _controller,
                                    isLightMode: widget.isLightMode,
                                    onRandomizeButtonTap: () {
                                      randomizeUsername(context);
                                    },
                                    state: state,
                                  )
                                : LightningUsernameInfo(
                                    username: state.username,
                                    isLightMode: widget.isLightMode,
                                  ),
                          )
                        ],
                      ),
                    ),
                    Padding(
                      padding: const EdgeInsets.symmetric(horizontal: 16.0),
                      child: Column(
                        spacing: 12,
                        children: [
                          if (widget.isSetup) ...[
                            Text(
                              S.of(context).lightning_username_setup_later,
                              textAlign: TextAlign.center,
                              style: TextStyle(
                                  fontSize: 12,
                                  color: Theme.of(context).colorScheme.onSurfaceVariant),
                            ),
                            SizedBox(),
                            NewPrimaryButton(
                                onPressed: () {
                                  Navigator.of(context).popUntil((route) => route.isFirst);
                                },
                                text: S.of(context).skip,
                                color: Theme.of(context).colorScheme.surfaceContainer,
                                textColor: Theme.of(context).colorScheme.primary),
                          ],
                          NewPrimaryButton(
                            onPressed: () {
                              if (_editMode) {
                                context.read<LightningUsernameBloc>().add(RequestUsernameSave());
                              } else {
                                setState(() {
                                  _editMode = true;
                                });
                              }
                            },
                            text: _editMode ? S.of(context).confirm : S.of(context).change_username,
                            color: Theme.of(context).colorScheme.primary,
                            textColor: Theme.of(context).colorScheme.onPrimary,
                            disabled: _editMode && (!(state is LightningUsernameReady)),
                            isLoading: (state is LightningUsernameSaving),
                          ),
                          SizedBox()
                        ],
                      ),
                    )
                  ],
                ),
              ),
            ),
          );
        },
      ),
    );
  }

  void randomizeUsername(BuildContext context) async {
    final randomNumber = Random.secure().nextInt(9999);
    final randomName = await generateName();
    final username = "${randomName.replaceAll(" ", "")}$randomNumber".toLowerCase();

    context.read<LightningUsernameBloc>().add(ChangeUsername(username));
    _controller.text = username;
  }
}

class LightningUsernameInfo extends StatelessWidget {
  const LightningUsernameInfo({super.key, required this.username, required this.isLightMode});

  final String username;
  final bool isLightMode;

  @override
  Widget build(BuildContext context) {
    return Column(
      spacing: 24,
      children: [
        HashImageWidget(
            imageUrl: isLightMode
            ? "assets/new-ui/lightning_username_setup_light.svg"
            : "assets/new-ui/lightning_username_setup.svg"),
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          spacing: 2,
          children: [
            Text(
              username,
              style: TextStyle(fontSize: 20, fontWeight: FontWeight.w500),
            ),
            Text(
              usernameSuffix,
              style: TextStyle(
                  fontSize: 20,
                  fontWeight: FontWeight.w500,
                  color: Theme.of(context).colorScheme.primary),
              textAlign: TextAlign.center,
            )
          ],
        ),
        Padding(
          padding: const EdgeInsets.symmetric(horizontal: 32.0),
          child: Text(
            S.of(context).lightning_username_desc_completed,
            style: TextStyle(color: Theme.of(context).colorScheme.onSurfaceVariant),
            textAlign: TextAlign.center,
          ),
        )
      ],
    );
  }
}

class LightningUsernameEditor extends StatelessWidget {
  const LightningUsernameEditor(
      {super.key,
      required this.controller,
      required this.onRandomizeButtonTap,
      required this.state,
      required this.isSetup,
      required this.isLightMode});

  final TextEditingController controller;
  final VoidCallback onRandomizeButtonTap;
  final bool isLightMode;
  final bool isSetup;
  final LightningUsernameState state;

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      spacing: 12,
      children: [
        HashImageWidget(
            imageUrl: isLightMode
            ? "assets/new-ui/lightning_username_setup_light.svg"
            : "assets/new-ui/lightning_username_setup.svg"),
        if (isSetup)
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 18.0),
            child: Text(
              S.of(context).lightning_username_desc,
              textAlign: TextAlign.center,
            ),
          ),
        SizedBox(),
        Padding(
          padding: EdgeInsets.symmetric(horizontal: 16),
          child: Row(
            children: [
              Expanded(
                child: Container(
                  decoration: BoxDecoration(
                      color: Theme.of(context).colorScheme.surfaceContainer,
                      borderRadius: BorderRadius.horizontal(left: Radius.circular(16))),
                  child: Row(
                    spacing: 8,
                    children: [
                      Expanded(
                          child: TextField(
                        onChanged: (val) {
                          context.read<LightningUsernameBloc>().add(ChangeUsername(val));
                        },
                        controller: controller,
                      )),
                      Material(
                        color: Colors.transparent,
                        child: InkWell(
                          onTap: onRandomizeButtonTap,
                          child: HashImageWidget(
                          imageUrl: "assets/new-ui/randomize.svg",
                              colorFilter: ColorFilter.mode(
                                  Theme.of(context).colorScheme.primary, BlendMode.srcIn)),
                        ),
                      ),
                      SizedBox()
                    ],
                  ),
                ),
              ),
              Container(
                alignment: Alignment.center,
                height: 56,
                decoration: BoxDecoration(
                    color: Theme.of(context).colorScheme.surfaceContainerHigh,
                    borderRadius: BorderRadius.horizontal(right: Radius.circular(16))),
                child: Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 16.0),
                  child: Text(
                    usernameSuffix,
                    style: TextStyle(fontSize: 16),
                  ),
                ),
              )
            ],
          ),
        ),
        if (state is LightningUsernameError)
          Text(
            (state as LightningUsernameError).error.message,
            textAlign: TextAlign.center,
            style: TextStyle(
                color: (state as LightningUsernameError).error.isInfo
                    ? Colors.green
                    : Theme.of(context).colorScheme.error),
          )
        else if (state is LightningUsernameReady)
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            spacing: 8,
            children: [
              Icon(
                Icons.check,
                color: Colors.green,
                size: 12,
              ),
              Text(
                S.of(context).username_available,
                style: TextStyle(color: Colors.green),
              )
            ],
          )
        else
          Text(""),
        SizedBox(height: MediaQuery.of(context).viewInsets.bottom.clamp(0, 100))
      ],
    );
  }
}