import 'package:clipboard/clipboard.dart';
import 'package:comunic/models/conversation_message.dart';
import 'package:comunic/models/user.dart';
import 'package:comunic/ui/widgets/conversation_file_tile.dart';
import 'package:comunic/ui/widgets/text_widget.dart';
import 'package:comunic/utils/date_utils.dart';
import 'package:comunic/utils/intl_utils.dart';
import 'package:comunic/utils/ui_utils.dart';
import 'package:flutter/material.dart';

/// Conversation message tile
///
/// @author Pierre HUBERT

enum _MenuChoices {
  COPY_URL,
  COPY_MESSAGE,
  DELETE,
  REQUEST_UPDATE_CONTENT,
  GET_STATS,
}

typedef OnRequestMessageStats = void Function(ConversationMessage);
typedef OnRequestMessageUpdate = void Function(ConversationMessage);
typedef OnRequestMessageDelete = void Function(ConversationMessage);

class ConversationMessageTile extends StatelessWidget {
  final ConversationMessage message;
  final User user;
  final OnRequestMessageStats onRequestMessageStats;
  final OnRequestMessageUpdate onRequestMessageUpdate;
  final OnRequestMessageDelete onRequestMessageDelete;

  const ConversationMessageTile({
    Key key,
    @required this.message,
    @required this.user,
    @required this.onRequestMessageStats,
    @required this.onRequestMessageUpdate,
    @required this.onRequestMessageDelete,
  })  : assert(message != null),
        assert(user != null),
        assert(onRequestMessageStats != null),
        assert(onRequestMessageUpdate != null),
        assert(onRequestMessageDelete != null),
        super(key: key);

  @override
  Widget build(BuildContext context) => Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          RichText(
            text: TextSpan(
                text:
                    "${user.fullName} - ${formatDisplayDate(message.date, date: false)}",
                style: TextStyle(color: Colors.white, fontSize: 11),
                children: [
                  WidgetSpan(
                    child: PopupMenuButton<_MenuChoices>(
                      child: Icon(
                        Icons.more_vert,
                        color: Colors.white,
                        size: 14,
                      ),
                      onSelected: (v) => _menuOptionSelected(context, v),
                      itemBuilder: (c) => <PopupMenuItem<_MenuChoices>>[
                        PopupMenuItem(
                          enabled: (message.message?.content ?? "") != "",
                          value: _MenuChoices.COPY_MESSAGE,
                          child: Text(tr("Copy message")),
                        ),

                        PopupMenuItem(
                          enabled: message.file != null,
                          value: _MenuChoices.COPY_URL,
                          child: Text(tr("Copy URL")),
                        ),

                        PopupMenuItem(
                          value: _MenuChoices.GET_STATS,
                          child: Text(tr("Statistics")),
                        ),

                        // Update message content
                        PopupMenuItem(
                          enabled: message.isOwner &&
                              message.message != null &&
                              message.message.content.isNotEmpty,
                          value: _MenuChoices.REQUEST_UPDATE_CONTENT,
                          child: Text(tr("Update")),
                        ),

                        // Delete the message
                        PopupMenuItem(
                          enabled: message.isOwner,
                          value: _MenuChoices.DELETE,
                          child: Text(tr("Delete")),
                        ),
                      ]..removeWhere((element) => !element.enabled),
                    ),
                  )
                ]),
          ),
          _buildMessageContent(),
        ],
      );

  Widget _buildMessageContent() {
    if (!message.hasFile)
      return TextWidget(
        content: message.message,
        textAlign: TextAlign.justify,
        style: TextStyle(color: Colors.white),
      );

    return ConversationFileWidget(messageID: message.id, file: message.file);
  }

  /// Process menu choice
  void _menuOptionSelected(BuildContext context, _MenuChoices value) {
    switch (value) {
      case _MenuChoices.COPY_MESSAGE:
        FlutterClipboard.copy(message.message.content);
        snack(context, tr("'${message.message.content}' copied to clipboard!"));
        break;

      case _MenuChoices.COPY_URL:
        FlutterClipboard.copy(message.file.url);
        snack(context, tr("'${message.file.url}' copied to clipboard!"));
        break;

      case _MenuChoices.GET_STATS:
        onRequestMessageStats(message);
        break;

      case _MenuChoices.REQUEST_UPDATE_CONTENT:
        onRequestMessageUpdate(message);
        break;

      case _MenuChoices.DELETE:
        onRequestMessageDelete(message);
        break;
    }
  }
}