import 'package:cached_network_image/cached_network_image.dart';
import 'package:comunic/models/conversation_message.dart';
import 'package:comunic/models/user.dart';
import 'package:comunic/utils/account_utils.dart';
import 'package:comunic/utils/date_utils.dart';
import 'package:flutter/material.dart';

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

class ConversationMessageTile extends StatelessWidget {
  final ConversationMessage message;
  final User userInfo;
  final bool isLastMessage;
  final bool isFirstMessage;

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

  /// Build account image
  Widget _buildAccountImage() {
    return Container(
      margin: EdgeInsets.all(10.0),
      child: Material(
        child: CachedNetworkImage(
          imageUrl: userInfo.accountImageURL,
          width: 35.0,
          height: 35.0,
          fit: BoxFit.cover,
        ),
        borderRadius: BorderRadius.all(
          Radius.circular(18.0),
        ),
        clipBehavior: Clip.hardEdge,
      ),
    );
  }

  /// Build widget image
  Widget _buildMessageImage() {
    return Container(
      margin: EdgeInsets.only(bottom: 2),
      child: Material(
        child: CachedNetworkImage(
          imageUrl: message.imageURL,
          width: 200.0,
          height: 200.0,
          fit: BoxFit.cover,
          placeholder: (c, s) => Container(
                width: 200,
                height: 200,
                color: Colors.lightBlueAccent,
                child: Center(
                  child: CircularProgressIndicator(),
                ),
              ),
          errorWidget: (c, s, o) => Container(
                width: 200,
                height: 200,
                color: Colors.red,
                child: Center(
                  child: Icon(Icons.error, color: Colors.white,)
                ),
              ),
        ),
        borderRadius: BorderRadius.all(Radius.circular(8.0)),
        clipBehavior: Clip.hardEdge,
      ),
    );
  }

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

  /// Build a message of the current user
  Widget _buildRightMessage() {
    return Container(
      margin: EdgeInsets.only(bottom: isLastMessage ? 20.0 : 10.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.end,
        children: <Widget>[
          Column(
            children: <Widget>[
              Row(
                children: <Widget>[
                  Column(
                    children: <Widget>[
                      // Text image
                      Container(
                        child: message.hasImage ? _buildMessageImage() : null,
                      ),

                      // Text message
                      Container(
                        child: message.hasMessage
                            ? Container(
                                child: Text(
                                  message.message,
                                  textAlign: TextAlign.justify,
                                  style: TextStyle(color: Colors.white),
                                ),
                                padding:
                                    EdgeInsets.fromLTRB(15.0, 10.0, 15.0, 10.0),
                                width: 200.0,
                                decoration: BoxDecoration(
                                  color: Colors.blueAccent,
                                  borderRadius: BorderRadius.circular(8.0),
                                ),
                              )
                            : null,
                      ),
                    ],
                  ),

                  // Account image
                  _buildAccountImage()
                ],
              ),

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

  /// Build a message of a peer user
  Widget _buildLeftMessage() {
    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(),

              Column(
                children: <Widget>[
                  // Text image
                  Container(
                    child: message.hasImage ? _buildMessageImage() : null,
                  ),

                  // Text message
                  Container(
                    child: message.hasMessage
                        ? Container(
                            child: Text(
                              message.message,
                              textAlign: TextAlign.justify,
                            ),
                            padding:
                                EdgeInsets.fromLTRB(15.0, 10.0, 15.0, 10.0),
                            width: 200.0,
                            decoration: BoxDecoration(
                              color: Colors.black12,
                              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 userID() == message.userID
        ? _buildRightMessage()
        : _buildLeftMessage();
  }
}