import 'package:clipboard/clipboard.dart';
import 'package:comunic/models/conversation.dart';
import 'package:comunic/models/conversation_message.dart';
import 'package:comunic/models/user.dart';
import 'package:comunic/ui/widgets/account_image_widget.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 Conversation conversation;
  final ConversationMessage message;
  final User userInfo;
  final bool isLastMessage;
  final bool isFirstMessage;
  final OnRequestMessageStats onRequestMessageStats;
  final OnRequestMessageUpdate onRequestMessageUpdate;
  final OnRequestMessageDelete onRequestMessageDelete;

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

  Color get backgroundColor => message.isOwner
      ? conversation.color ?? Colors.blueAccent
      : darkTheme()
          ? Colors.white12
          : Colors.black12;

  /// Build account image
  Widget _buildAccountImage(BuildContext context) {
    return Container(
      margin: EdgeInsets.all(10.0),
      child: PopupMenuButton<_MenuChoices>(
        child: AccountImageWidget(
          user: userInfo,
          width: 35.0,
        ),
        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),
        onSelected: _menuOptionSelected,
      ),
    );
  }

  /// Build widget image
  Widget _buildMessageFile(BuildContext context) => ConversationFileWidget(
        messageID: message.id,
        file: message.file,
        defaultBackgroundColor: backgroundColor,
      );

  /// Build message date
  Widget _buildMessageDate() {
    return isLastMessage
        ? Container(
            margin: EdgeInsets.only(top: 5.0),
            child: Text(
              dateTimeToString(message.date),
              style: TextStyle(
                  color: darkTheme() ? Colors.white : Colors.black54,
                  fontSize: 12.0),
              textAlign: TextAlign.center,
            ),
          )
        : Container();
  }

  /// Build a message of the current user
  Widget _buildRightMessage(BuildContext context) {
    return Container(
      margin: EdgeInsets.only(bottom: isLastMessage ? 20.0 : 2.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.end,
        children: <Widget>[
          Column(
            children: <Widget>[
              Row(
                children: <Widget>[
                  Column(
                    children: <Widget>[
                      // Text image
                      Container(
                        child:
                            message.hasFile ? _buildMessageFile(context) : null,
                      ),

                      // Text message
                      Container(
                        child: message.hasMessage
                            ? Container(
                                width: 200.0,
                                alignment: Alignment.centerRight,
                                child: Container(
                                  child: TextWidget(
                                    content: message.message,
                                    textAlign: TextAlign.justify,
                                    style: TextStyle(color: Colors.white),
                                    linksColor: Colors.indigo,
                                  ),
                                  padding: EdgeInsets.fromLTRB(
                                      15.0, 10.0, 15.0, 10.0),
                                  decoration: BoxDecoration(
                                    color: backgroundColor,
                                    borderRadius: BorderRadius.circular(8.0),
                                  ),
                                ),
                              )
                            : null,
                      ),
                    ],
                  ),

                  // Account image
                  _buildAccountImage(context)
                ],
              ),

              // Date
              Container(
                child: _buildMessageDate(),
                margin: EdgeInsets.only(right: 45.0),
              )
            ],
          ),
        ],
      ),
    );
    // Text
  }

  /// Build a message of a peer user
  Widget _buildLeftMessage(BuildContext context) {
    return Container(
      margin: EdgeInsets.only(bottom: isLastMessage ? 20.0 : 5.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          //User name
          Container(
            margin: EdgeInsets.only(left: 55.0),
            child: isFirstMessage
                ? Text(
                    userInfo.fullName,
                    textAlign: TextAlign.left,
                    style: TextStyle(fontSize: 12.0),
                  )
                : null,
          ),

          Row(
            children: <Widget>[
              // Account image
              _buildAccountImage(context),

              Column(
                children: <Widget>[
                  // Text image
                  Container(
                    child: message.hasFile ? _buildMessageFile(context) : null,
                  ),

                  // Text message
                  Container(
                    child: message.hasMessage
                        ? Container(
                            width: 200.0,
                            alignment: Alignment.centerLeft,
                            child: Container(
                              child: TextWidget(
                                content: message.message,
                                textAlign: TextAlign.justify,
                                style: TextStyle(
                                    color: darkTheme()
                                        ? Colors.white
                                        : Colors.black),
                              ),
                              padding:
                                  EdgeInsets.fromLTRB(15.0, 10.0, 15.0, 10.0),
                              decoration: BoxDecoration(
                                color: backgroundColor,
                                borderRadius: BorderRadius.circular(8.0),
                              ),
                            ),
                          )
                        : null,
                  ),
                ],
              ),
            ],
          ),

          // Date
          Container(
            margin: EdgeInsets.only(left: 50.0),
            child: Align(
              alignment: Alignment.topLeft,
              child: _buildMessageDate(),
            ),
          )
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return message.isOwner
        ? _buildRightMessage(context)
        : _buildLeftMessage(context);
  }

  /// Process menu choice
  void _menuOptionSelected(_MenuChoices value) {
    switch (value) {
      case _MenuChoices.COPY_MESSAGE:
        FlutterClipboard.copy(message.message.content);
        break;

      case _MenuChoices.COPY_URL:
        FlutterClipboard.copy(message.file.url);
        break;

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

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

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