import 'package:diameter/components/dialogs.dart';
import 'package:diameter/config.dart';
import 'package:diameter/models/log_entry.dart';
import 'package:diameter/models/log_meal.dart';
import 'package:diameter/screens/log/log_meal_detail.dart';
import 'package:flutter/material.dart';
import 'package:diameter/components/progress_indicator.dart';

class LogMealListScreen extends StatefulWidget {
  final LogEntry? logEntry;

  const LogMealListScreen({Key? key, this.logEntry}) : super(key: key);

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

class _LogMealListScreenState extends State<LogMealListScreen> {
  void refresh({String? message}) {
    if (widget.logEntry != null) {
      setState(() {
        widget.logEntry!.meals = LogMeal.fetchAllForLogEntry(widget.logEntry!);
      });
    }
    setState(() {
      if (message != null) {
        var snackBar = SnackBar(
          content: Text(message),
          duration: const Duration(seconds: 2),
        );
        ScaffoldMessenger.of(context)
          ..removeCurrentSnackBar()
          ..showSnackBar(snackBar);
      }
    });
  }

  void handleEditAction(LogMeal meal) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => LogMealDetailScreen(
          logEntry: widget.logEntry!,
          logMeal: meal,
        ),
      ),
    ).then((message) => refresh(message: message));
  }

  void onDelete(LogMeal meal) {
    meal.delete().then((_) => refresh(message: 'Meal deleted'));
  }

  void handleDeleteAction(LogMeal meal) async {
    if (showConfirmationDialogOnDelete) {
      Dialogs.showConfirmationDialog(
        context: context,
        onConfirm: () => onDelete(meal),
        message: 'Are you sure you want to delete this Meal?',
      );
    } else {
      onDelete(meal);
    }
  }

  @override
  void initState() {
    super.initState();
    refresh();
  }

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      padding: const EdgeInsets.only(top: 10.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          FutureBuilder<List<LogMeal>>(
            future: widget.logEntry!.meals,
            builder: (context, snapshot) {
              return ViewWithProgressIndicator(
                snapshot: snapshot,
                child: snapshot.data == null || snapshot.data!.isEmpty
                    ? const Padding(
                        padding: EdgeInsets.all(10.0),
                        child: Text('No Meals for this Log Entry'),
                      )
                    : ListBody(
                        children: [
                          DataTable(
                            columnSpacing: 10.0,
                            showCheckboxColumn: false,
                            rows: snapshot.data != null
                                ? snapshot.data!.map((meal) {
                                    return DataRow(
                                      cells: meal.asDataTableCells(
                                        [
                                          IconButton(
                                              icon: const Icon(Icons.edit),
                                              iconSize: 16.0,
                                              onPressed: () =>
                                                  handleEditAction(meal)),
                                          IconButton(
                                              icon: const Icon(Icons.delete),
                                              iconSize: 16.0,
                                              onPressed: () =>
                                                  handleDeleteAction(meal)),
                                        ],
                                      ),
                                    );
                                  }).toList()
                                : [],
                            columns: LogMeal.asDataTableColumns(),
                          ),
                        ],
                      ),
              );
            },
          ),
        ],
      ),
    );
  }
}