cdb_ui/lib/pages/transaction.dart

import 'package:cdb_ui/api.dart';
import 'package:cdb_ui/pages/consume.dart';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:qr_bar_code/qr/qr.dart';

class TransactionPage extends StatelessWidget {
  final Transaction transaction;
  final Function? refresh;

  const TransactionPage(this.transaction, {this.refresh, super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(transaction.item),
        actions: [
          IconButton(
              onPressed: () async {
                final locations = await API().getLocations();
                List<String> locationList = locations.keys.toList();
                String? selectedLocationID;

                await showDialog<int>(
                  context: context,
                  builder: (BuildContext context) {
                    return AlertDialog(
                      title: const Text('Select Location'),
                      content: Row(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          DropdownButton<String>(
                            value: selectedLocationID,
                            onChanged: (value) {
                              selectedLocationID = value!;
                            },
                            items: locationList
                                .map<DropdownMenuItem<String>>((locationID) {
                              return DropdownMenuItem<String>(
                                value: locationID,
                                child: Text(locations[locationID]!.name),
                              );
                            }).toList(),
                          ),
                          IconButton(
                              onPressed: () {
                                // todo : implement
                              },
                              icon: const Icon(Icons.qr_code))
                        ],
                      ),
                      actions: [
                        ElevatedButton(
                          onPressed: () async {
                            await API().moveTransaction(
                                transaction.uuid, selectedLocationID!);
                            Navigator.pop<int>(context);
                          },
                          child: const Text('Done'),
                        ),
                      ],
                    );
                  },
                );
              },
              icon: const Icon(Icons.move_up))
        ],
      ),
      body: Column(
        children: [
          Text("UUID: ${transaction.uuid}"),
          QRCode(
            data: transaction.uuid,
            size: 22,
            semanticsLabel: "Transaction UUID",
          ),

          // todo : human names
          Text("${transaction.item} - ${transaction.variant}"),

          Text("Added: ${tsFormat(transaction.timestamp)}"),

          if (transaction.expired) const Text("Transaction is Expired!"),

          IconText(Icons.money, transaction.price.format(),
              color: Colors.green),

          if (transaction.origin != null)
            IconText(Icons.store, transaction.origin!, color: Colors.blue),

          if (transaction.location != null)
            IconText(Icons.location_city, transaction.location!.name),

          if (transaction.note != null) Text(transaction.note!),

          if (transaction.consumed != null) ...[
            const Divider(),
            Text("Consumed on: ${tsFormat(transaction.consumed!.timestamp)}"),
            IconText(Icons.store, transaction.consumed!.destination,
                color: Colors.blue),
            IconText(Icons.money, transaction.consumed!.price.format(),
                color: Colors.green),
          ]

          // todo : chart with price history
        ],
      ),
      floatingActionButton: FloatingActionButton(
          onPressed: () {
            Navigator.of(context).pushReplacement(MaterialPageRoute(
              builder: (context) {
                return ConsumePage(transaction, refresh ?? () {});
              },
            ));
          },
          child: const Icon(Icons.receipt_long)),
    );
  }
}

class TransactionCard extends StatelessWidget {
  final Transaction t;
  final Function refresh;
  final Function(Transaction)? onTap;
  final Function(Transaction)? onLongPress;

  const TransactionCard(this.t, this.refresh,
      {this.onTap, this.onLongPress, super.key});

  @override
  Widget build(BuildContext context) {
    return InkWell(
      onTap: () {
        if (onTap != null) {
          onTap!(t);
          return;
        }

        Navigator.of(context).push(MaterialPageRoute(
          builder: (context) {
            return ConsumePage(t, refresh);
          },
        ));
      },
      onLongPress: () {
        if (onLongPress != null) {
          onLongPress!(t);
          return;
        }

        Navigator.of(context).push(MaterialPageRoute(
          builder: (context) {
            return TransactionPage(t);
          },
        ));
      },
      child: Card(
        color: t.expired ? Colors.red[100] : Colors.black,
        margin: const EdgeInsets.symmetric(vertical: 8, horizontal: 16),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(10),
        ),
        elevation: 4,
        child: Padding(
          padding: const EdgeInsets.all(12),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Row(
                    children: [
                      Text(
                        t.item,
                        style: const TextStyle(fontSize: 16),
                      ),
                      const SizedBox(
                        width: 4,
                      ),
                      Text(
                        t.variant,
                        style: TextStyle(fontSize: 14, color: Colors.grey[400]),
                      ),
                    ],
                  ),
                  Text(
                    tsFormat(t.timestamp),
                    style: TextStyle(fontSize: 14, color: Colors.grey[700]),
                  ),
                ],
              ),
              if ((t.note ?? "").isNotEmpty) ...[
                const SizedBox(
                  height: 4,
                ),
                Text(t.note!)
              ],
              const SizedBox(
                height: 10,
              ),
              IconText(Icons.money,
                  "${t.price.value.toStringAsFixed(2)} ${t.price.currency}",
                  color: Colors.green),
              if (t.origin != null) ...[
                const SizedBox(height: 8),
                IconText(Icons.store, t.origin!, color: Colors.blue)
              ],
              if (t.location != null) ...[
                const SizedBox(
                  height: 8,
                ),
                IconText(Icons.location_city, t.location!.name)
              ]
            ],
          ),
        ),
      ),
    );
  }
}

String tsFormat(int ts) {
  DateTime dateTime = DateTime.fromMillisecondsSinceEpoch(ts * 1000);
  return DateFormat('yyyy-MM-dd HH:mm:ss').format(dateTime);
}

class IconText extends StatelessWidget {
  final IconData icon;
  final String text;
  final Color? color;

  const IconText(this.icon, this.text, {super.key, this.color});

  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Icon(icon, size: 18, color: color),
        const SizedBox(width: 6),
        Text(
          text,
          style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
        ),
      ],
    );
  }
}