import 'package:flutter/material.dart';
import 'package:calorimeter/food_entry/food_entry_bloc.dart';
import 'package:calorimeter/utils/row_with_spacers_widget.dart';

class FoodEntryWidget extends StatefulWidget {
  final FoodEntryState entry;
  final Function(BuildContext context, String id) onDelete;
  final Function(BuildContext context, FoodEntryState entry) onChange;
  final Function(BuildContext context, FoodEntryState entry) onTap;

  const FoodEntryWidget({
    super.key,
    required this.entry,
    required this.onDelete,
    required this.onChange,
    required this.onTap,
  });

  @override
  State<FoodEntryWidget> createState() => _FoodEntryWidgetState();
}

class _FoodEntryWidgetState extends State<FoodEntryWidget> {
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () => widget.onTap(context, widget.entry),
      child: Stack(
        children: [
          Positioned.fill(
            child: Stack(children: [
              Positioned.fill(
                child: Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 8.0),
                  child: RowWidget(
                    widget.entry.waitingForNetwork
                        ? const Center(child: CircularProgressIndicator())
                        : Text(widget.entry.name),
                    widget.entry.waitingForNetwork
                        ? Container()
                        : Text(widget.entry.mass.ceil().toString(),
                            textAlign: TextAlign.end),
                    Opacity(
                      opacity: widget.entry.isSelected ? 0.0 : 1.0,
                      child: widget.entry.waitingForNetwork
                          ? Container()
                          : Text(widget.entry.kcalPer100.ceil().toString(),
                              textAlign: TextAlign.end),
                    ),
                    Opacity(
                      opacity: widget.entry.isSelected ? 0.0 : 1.0,
                      child: widget.entry.waitingForNetwork
                          ? Container()
                          : Text(
                              (widget.entry.mass *
                                      widget.entry.kcalPer100 /
                                      100)
                                  .ceil()
                                  .toString(),
                              textAlign: TextAlign.end),
                    ),
                  ),
                ),
              ),
              Opacity(
                  opacity: widget.entry.isSelected ? 0.66 : 0.0,
                  child: Container(
                      color: Theme.of(context).colorScheme.secondary)),
            ]),
          ),
          Opacity(
            opacity: widget.entry.isSelected ? 1.0 : 0.0,
            child: Row(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                SizedBox(
                  child: IconButton(
                    padding: const EdgeInsets.all(0.0),
                    icon: const Icon(Icons.cancel),
                    onPressed: widget.entry.isSelected
                        ? widget.onTap(context, widget.entry)
                        : null,
                  ),
                ),
                SizedBox(
                  child: IconButton(
                      padding: const EdgeInsets.all(0.0),
                      iconSize: 24,
                      icon: const Icon(Icons.delete),
                      color: Colors.redAccent,
                      onPressed: widget.entry.isSelected
                          ? () => widget.onDelete(context, widget.entry.id)
                          : null),
                ),
                SizedBox(
                  child: IconButton(
                      padding: const EdgeInsets.all(0.0),
                      icon: const Icon(Icons.edit),
                      onPressed: widget.entry.isSelected
                          ? () async {
                              widget.onTap(context, widget.entry);
                              await showDialog(
                                context: context,
                                builder: (dialogContext) {
                                  return FoodEntryChangeDialog(
                                      entry: widget.entry,
                                      onChange: (context, entry) {
                                        widget.onChange(context, entry);
                                      });
                                },
                              );
                            }
                          : null),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}

class FoodEntryChangeDialog extends StatefulWidget {
  final FoodEntryState entry;
  final Function(BuildContext context, FoodEntryState entry) onChange;

  const FoodEntryChangeDialog(
      {required this.entry, super.key, required this.onChange});

  @override
  State<FoodEntryChangeDialog> createState() => _FoodEntryChangeDialogState();
}

class _FoodEntryChangeDialogState extends State<FoodEntryChangeDialog> {
  late TextEditingController nameController;
  late TextEditingController massController;
  late TextEditingController kcalPer100Controller;

  static const textFieldVerticalPadding = 16.0;
  static const textFieldHorizontalPadding = 16.0;

  @override
  void initState() {
    nameController = TextEditingController();
    nameController.text = widget.entry.name;

    massController = TextEditingController();
    massController.text = widget.entry.mass.toString();

    kcalPer100Controller = TextEditingController();
    kcalPer100Controller.text = widget.entry.kcalPer100.toString();

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      content: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Padding(
            padding: const EdgeInsets.symmetric(
                vertical: textFieldVerticalPadding,
                horizontal: textFieldHorizontalPadding),
            child: TextField(
              onSubmitted: (val) => _onSubmitAction(),
              controller: nameController,
              decoration: const InputDecoration(
                label: Text("Name"),
              ),
            ),
          ),
          Padding(
            padding: const EdgeInsets.symmetric(
                vertical: textFieldVerticalPadding,
                horizontal: textFieldHorizontalPadding),
            child: TextField(
              onSubmitted: (val) => _onSubmitAction(),
              controller: massController,
              decoration: const InputDecoration(
                label: Text("Menge"),
              ),
            ),
          ),
          Padding(
            padding: const EdgeInsets.symmetric(
                vertical: textFieldVerticalPadding,
                horizontal: textFieldHorizontalPadding),
            child: TextField(
              onSubmitted: (val) => _onSubmitAction(),
              controller: kcalPer100Controller,
              decoration: const InputDecoration(
                label: Text("kcal pro Menge"),
              ),
            ),
          )
        ],
      ),
      actions: [
        IconButton(
            onPressed: () {
              Navigator.of(context).pop();
            },
            icon: const Icon(Icons.cancel)),
        IconButton(
          onPressed: () => _onSubmitAction(),
          icon: const Icon(Icons.check),
        )
      ],
    );
  }

  void _onSubmitAction() {
    int mass;
    int kcalPer100;

    try {
      mass = int.parse(massController.text);
    } catch (e) {
      mass = 0;
    }

    try {
      kcalPer100 = int.parse(kcalPer100Controller.text);
    } catch (e) {
      kcalPer100 = 0;
    }

    var newEntry = FoodEntryState.withID(
      id: widget.entry.id,
      name: nameController.text,
      mass: mass,
      kcalPer100: kcalPer100,
      waitingForNetwork: widget.entry.waitingForNetwork,
      isSelected: false,
    );

    widget.onChange(context, newEntry);

    Navigator.of(context).pop();
  }
}