import 'dart:io';

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/src/widgets/new_list_row/new_simple_checkbox.dart';
import 'package:flutter/material.dart';
import 'package:flutter_mobx/flutter_mobx.dart';
import 'package:flutter_svg/svg.dart';

class PickerItem<Item> {
  final String title;
  final String? subtitle;
  final String? hint;
  final Item value;
  final bool isSliderItem;

  PickerItem(
      {required this.title,
      this.subtitle,
      this.hint,
      required this.value,
      this.isSliderItem = false});
}

class NewPicker<Item> extends StatefulWidget {
  const NewPicker({
    super.key,
    this.title = "Please select",
    this.sliderPageTitle = "Custom value",
    required this.items,
    this.description,
    required this.onItemSelected,
    this.sliderInitialValue,
    this.sliderMaxValue,
    this.sliderValueDescription,
    this.onSliderChanged,
    required this.selectedIndex,
    this.closeOnSelection = false,
  });

  final String title;
  final String sliderPageTitle;
  final String? description;
  final String? sliderValueDescription;
  final List<PickerItem<Item>> items;
  final int selectedIndex;
  final Function(Item) onItemSelected;
  final double? sliderInitialValue;
  final double? sliderMaxValue;
  final Function(double)? onSliderChanged;
  final bool closeOnSelection;

  @override
  State<NewPicker<Item>> createState() => _NewPickerState();
}

class _NewPickerState<Item> extends State<NewPicker<Item>> {
  late double? sliderCurrentValue;

  @override
  void initState() {
    super.initState();
    sliderCurrentValue = widget.sliderInitialValue;
  }

  @override
  Widget build(BuildContext context) {
    return Observer(
      builder: (_)=>Container(
        decoration: BoxDecoration(
            color: Theme.of(context).colorScheme.surface,
            borderRadius: BorderRadius.vertical(top: Radius.circular(24))),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            ModalTopBar(
              title: widget.title,
              leadingIcon: Icon(Icons.arrow_back_ios_new),
              onLeadingPressed: Navigator.of(context).maybePop,
            ),
            Padding(
              padding: const EdgeInsets.symmetric(horizontal: 12.0),
              child: SafeArea(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    if (widget.description != null && widget.description!.isNotEmpty)
                      Text(widget.description!,textAlign: TextAlign.center,style: TextStyle(fontSize:14,fontWeight: FontWeight.w400,color: Theme.of(context).colorScheme.onSurfaceVariant),),
                    SizedBox(height:16),
                    ...widget.items.map((item) {
                      final isSelected = widget.items.indexOf(item) == widget.selectedIndex;
                      return Column( children: [
                        if (item.isSliderItem)
                          PickerSliderButton(
                            key: ValueKey(isSelected),
                            item: item,
                            isSelected: isSelected,
                            onSelected: (item) {
                              Navigator.of(context).push(MaterialPageRoute(
                                  builder: (context) => Material(
                                    child: PickerSliderPage(
                                        title: widget.sliderPageTitle,
                                        sliderInitialValue: sliderCurrentValue!,
                                        valueDescription: widget.sliderValueDescription ?? "",
                                        sliderMaxValue: widget.sliderMaxValue!,
                                        onSubmitted: (value) {
                                          setState(() {
                                            sliderCurrentValue = value;
                                          });
                                          widget.onSliderChanged?.call(value);
                                          widget.onItemSelected(item);
                                        }),
                                  )));
                            },
                            isFirst: widget.items.indexOf(item) == 0,
                            customSubtitle: "${sliderCurrentValue?.toInt()} ${widget.sliderValueDescription}",
                            isLast: widget.items.indexOf(item) == widget.items.length - 1,
                          )
                        else
                          PickerRow(
                            item: item,
                            isSelected: isSelected,
                            onSelected: _itemSelected,
                            isFirst: widget.items.indexOf(item) == 0,
                            isLast: widget.items.indexOf(item) == widget.items.length - 1,
                          ),
                        if (widget.items.indexOf(item) != widget.items.length - 1)
                          Container(
                            color: Theme.of(context).colorScheme.surfaceContainer,
                            child: Padding(
                              padding: const EdgeInsets.symmetric(horizontal: 18.0),
                              child: Container(
                                height: 1,
                                color: Theme.of(context).colorScheme.surfaceContainerHigh,
                              ),
                            ),
                          )
                      ]);
                    }),
                    SizedBox(height: 16),
                    NewPrimaryButton(
                        onPressed: Navigator.of(context).maybePop,
                        text: "Continue",
                        color: Theme.of(context).colorScheme.primary,
                        textColor: Theme.of(context).colorScheme.onPrimary),
                  ],
                ),
              ),
            )
          ],
        ),
      ),
    );
  }

  void _itemSelected(Item value) {
    widget.onItemSelected(value);
    if (widget.closeOnSelection) {
      Navigator.of(context).pop();
    }
  }
}

class PickerSliderButton<Item> extends StatelessWidget {
  const PickerSliderButton(
      {super.key,
      required this.item,
      required this.isSelected,
      required this.onSelected,
      required this.isFirst,
      required this.isLast, this.customSubtitle});

  final PickerItem<Item> item;
  final bool isSelected;
  final bool isFirst;
  final bool isLast;
  final String? customSubtitle;
  final Function(Item) onSelected;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        onSelected(item.value);
      },
      child: Container(
        height: 64,
        width: MediaQuery.of(context).size.height*0.9,
        decoration: BoxDecoration(
            color: Theme.of(context).colorScheme.surfaceContainer,
            borderRadius: BorderRadius.vertical(
                top: isFirst ? Radius.circular(16) : Radius.circular(0),
                bottom: isLast ? Radius.circular(16) : Radius.circular(0))),
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 12.0),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    spacing: 8,
                    children: [
                      Text(
                        item.title,
                        style: TextStyle(
                            fontSize: 14,
                            color: Theme.of(context).colorScheme.onSurface,
                            fontWeight: FontWeight.w500),
                      ),
                      if (item.hint != null)
                        Text(item.hint!,
                            style: TextStyle(
                                fontSize: 14,
                                color: Theme.of(context).colorScheme.onSurfaceVariant,
                                fontWeight: FontWeight.w400)),
                      if(isSelected)  HashImageWidget(imageUrl:
                        "assets/new-ui/arrow_right.svg",
                        colorFilter:
                        ColorFilter.mode(Theme.of(context).colorScheme.primary, BlendMode.srcIn),)
                    ],
                  ),
                  if (customSubtitle != null || item.subtitle != null)  Text(customSubtitle ?? item.subtitle!,style: TextStyle(
                      fontSize: 12,
                      color: Theme.of(context).colorScheme.onSurfaceVariant,
                      fontWeight: FontWeight.w400))
                ],
              ),
              isSelected? NewSimpleCheckbox(value: true, onChanged: (val){}):
              HashImageWidget(imageUrl:
                "assets/new-ui/arrow_right.svg",
                colorFilter:
                    ColorFilter.mode(Theme.of(context).colorScheme.primary, BlendMode.srcIn),
              )
            ],
          ),
        ),
      ),
    );
  }
}

class PickerRow<Item> extends StatelessWidget {
  const PickerRow(
      {super.key,
      required this.item,
      required this.isSelected,
      required this.onSelected,
      required this.isFirst,
      required this.isLast});

  final PickerItem<Item> item;
  final bool isSelected;
  final bool isFirst;
  final bool isLast;
  final Function(Item) onSelected;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        onSelected(item.value);
      },
      child: Container(
        height: 64,
        width: MediaQuery.of(context).size.height*0.9,
        decoration: BoxDecoration(
            color: Theme.of(context).colorScheme.surfaceContainer,
            borderRadius: BorderRadius.vertical(
                top: isFirst ? Radius.circular(16) : Radius.circular(0),
                bottom: isLast ? Radius.circular(16) : Radius.circular(0))),
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 12.0),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                mainAxisSize: MainAxisSize.max,
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Row(
                    spacing: 4,
                    children: [
                      Text(item.title,
                          style: TextStyle(
                              fontSize: 14,
                              color: Theme.of(context).colorScheme.onSurface,
                              fontWeight: FontWeight.w500)),
                      if (item.hint != null)
                        Text(item.hint!,
                            style: TextStyle(
                                fontSize: 14,
                                color: Theme.of(context).colorScheme.onSurfaceVariant,
                                fontWeight: FontWeight.w400))
                    ],
                  ),
                  item.subtitle != null ? Text(item.subtitle!,style: TextStyle(
                      fontSize: 12,
                      color: Theme.of(context).colorScheme.onSurfaceVariant,
                      fontWeight: FontWeight.w400)) : SizedBox.shrink()
                ],
              ),
              AnimatedSwitcher(
                duration: Duration(milliseconds: 100),

                  child: isSelected
                      ? NewSimpleCheckbox(key: ValueKey(1), value: true, onChanged: (val){onSelected(item.value);})
                      : NewSimpleCheckbox(key: ValueKey(0), value: false, onChanged: (val){onSelected(item.value);})
              )
            ],
          ),
        ),
      ),
    );
  }
}

class PickerSliderPage<Item> extends StatefulWidget {
  const PickerSliderPage(
      {super.key,
      required this.sliderInitialValue,
      required this.sliderMaxValue,
      required this.onSubmitted,
      required this.title,
      this.valueDescription = ""});

  final double sliderInitialValue;
  final double sliderMaxValue;
  final Function(double) onSubmitted;
  final String title;
  final String valueDescription;

  @override
  State<PickerSliderPage<Item>> createState() => _PickerSliderPageState();
}

class _PickerSliderPageState<Item> extends State<PickerSliderPage<Item>> {
  late double sliderValue;

  @override
  void initState() {
    super.initState();
    sliderValue = widget.sliderInitialValue;
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
          color: Theme.of(context).colorScheme.surface,
          borderRadius: BorderRadius.vertical(top: Radius.circular(16))),
      child: SafeArea(
        child: Column(
          spacing: 36,
          mainAxisSize: MainAxisSize.max,
          children: [
            ModalTopBar(
              title: widget.title,
              leadingIcon: Icon(Icons.arrow_back_ios_new),
              onLeadingPressed: Navigator.of(context).pop,
            ),
            Expanded(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                mainAxisSize: MainAxisSize.max,
                children: [
                  Row(mainAxisAlignment:MainAxisAlignment.center,spacing:4,children: [
                    Text(sliderValue.toStringAsFixed(0), style: TextStyle(fontSize:18,fontWeight: FontWeight.w600,color: Theme.of(context).colorScheme.primary),),
                    Text(widget.valueDescription, style: TextStyle(fontSize:18,fontWeight: FontWeight.w600,color: Theme.of(context).colorScheme.onSurface)),
                  ],),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 16.0),
                    child: Slider(
                      activeColor: Theme.of(context).colorScheme.primary,
                      inactiveColor: Theme.of(context).colorScheme.surfaceContainer,
                      thumbColor: Theme.of(context).colorScheme.onSurface,
                      value: sliderValue,
                      onChanged: (value) {
                        setState(() {
                          sliderValue = value.roundToDouble();
                        });
                      },
                      min: 1,
                      max: widget.sliderMaxValue,
                    ),
                  ),
                ],
              ),
            ),
            Padding(
              padding: const EdgeInsets.all(16.0),
              child: NewPrimaryButton(onPressed: (){
                widget.onSubmitted(sliderValue);
                Navigator.of(context).pop();
              }, text: "Continue", color: Theme.of(context).colorScheme.primary, textColor: Theme.of(context).colorScheme.onPrimary),
            )
          ],
        ),
      ),
    );
  }
}