import 'dart:ui';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:stream_chat/stream_chat.dart';
import 'package:stream_chat_flutter/src/reaction_picker.dart';
import 'package:stream_chat_flutter/src/stream_channel.dart';
import 'package:stream_chat_flutter/src/stream_icons.dart';

import 'message_input.dart';
import 'message_widget.dart';
import 'stream_chat.dart';
import 'stream_chat_theme.dart';

class MessageActionsModal extends StatelessWidget {
  final Widget Function(BuildContext, Message) editMessageInputBuilder;
  final void Function(Message) onThreadTap;
  final Message message;
  final MessageTheme messageTheme;
  final bool showReactions;
  final bool showDeleteMessage;
  final bool showCopyMessage;
  final bool showEditMessage;
  final bool showReply;
  final bool reverse;
  final ShapeBorder messageShape;

  const MessageActionsModal({
    Key key,
    @required this.message,
    @required this.messageTheme,
    this.showReactions = true,
    this.showDeleteMessage = true,
    this.showEditMessage = true,
    this.onThreadTap,
    this.showCopyMessage = true,
    this.showReply = true,
    this.editMessageInputBuilder,
    this.messageShape,
    this.reverse = false,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        Positioned.fill(
          child: GestureDetector(
            behavior: HitTestBehavior.translucent,
            onTap: () {
              Navigator.pop(context);
            },
            child: BackdropFilter(
              filter: ImageFilter.blur(
                sigmaX: 10,
                sigmaY: 10,
              ),
              child: Container(
                color: Colors.transparent,
              ),
            ),
          ),
        ),
        Padding(
          padding: const EdgeInsets.symmetric(vertical: 8.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              if (showReactions &&
                  (message.status == MessageSendingStatus.SENT ||
                      message.status == null))
                Center(
                  child: ReactionPicker(
                    message: message,
                    messageTheme: messageTheme,
                  ),
                ),
              IgnorePointer(
                child: MessageWidget(
                  key: Key('MessageWidget'),
                  reverse: reverse,
                  message: message.copyWith(
                    text: message.text.length > 200
                        ? '${message.text.substring(0, 200)}...'
                        : message.text,
                    attachments: message.attachments.length > 1
                        ? [message.attachments[0]]
                        : message.attachments,
                  ),
                  messageTheme: messageTheme,
                  showReactions: false,
                  showUsername: false,
                  showReplyIndicator: false,
                  showTimestamp: false,
                  showSendingIndicator: DisplayWidget.gone,
                  shape: messageShape,
                ),
              ),
              SizedBox(
                height: 8,
              ),
              Flexible(
                child: Padding(
                  padding: const EdgeInsets.symmetric(
                    horizontal: 48.0,
                  ),
                  child: Material(
                    clipBehavior: Clip.hardEdge,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(16),
                    ),
                    child: SingleChildScrollView(
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.stretch,
                        children: ListTile.divideTiles(
                          context: context,
                          tiles: [
                            if (showReply &&
                                (message.status == MessageSendingStatus.SENT ||
                                    message.status == null) &&
                                message.parentId == null)
                              _buildReplyButton(context),
                            if (showEditMessage) _buildEditMessage(context),
                            if (showDeleteMessage) _buildDeleteButton(context),
                            if (showCopyMessage) _buildCopyButton(context),
                          ],
                        ).toList(),
                      ),
                    ),
                  ),
                ),
              )
            ],
          ),
        ),
      ],
    );
  }

  Widget _buildDeleteButton(BuildContext context) {
    return ListTile(
      title: Text(
        'Delete message',
        style:
            Theme.of(context).textTheme.headline6.copyWith(color: Colors.red),
      ),
      leading: Icon(
        StreamIcons.delete,
        color: Colors.red,
      ),
      onTap: () {
        Navigator.pop(context);
        StreamChat.of(context).client.deleteMessage(
              message,
              StreamChannel.of(context).channel.cid,
            );
      },
    );
  }

  Widget _buildCopyButton(BuildContext context) {
    return ListTile(
      title: Text(
        'Copy message',
        style: Theme.of(context).textTheme.headline6,
      ),
      leading: Icon(
        StreamIcons.copy,
        color: StreamChatTheme.of(context).primaryIconTheme.color,
      ),
      onTap: () async {
        await Clipboard.setData(ClipboardData(text: message.text));
        Navigator.pop(context);
      },
    );
  }

  Widget _buildEditMessage(BuildContext context) {
    return ListTile(
      title: Text(
        'Edit message',
        style: Theme.of(context).textTheme.headline6,
      ),
      leading: Icon(
        StreamIcons.edit,
        color: StreamChatTheme.of(context).primaryIconTheme.color,
      ),
      onTap: () async {
        Navigator.pop(context);
        _showEditBottomSheet(context);
      },
    );
  }

  void _showEditBottomSheet(BuildContext context) {
    final channel = StreamChannel.of(context).channel;
    showModalBottomSheet(
      context: context,
      elevation: 2,
      clipBehavior: Clip.hardEdge,
      isScrollControlled: true,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.only(
          topLeft: Radius.circular(32),
          topRight: Radius.circular(32),
        ),
      ),
      builder: (context) {
        return StreamChannel(
          channel: channel,
          child: Flex(
            direction: Axis.vertical,
            mainAxisAlignment: MainAxisAlignment.end,
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Padding(
                padding: const EdgeInsets.only(
                  top: 16.0,
                  left: 16.0,
                  right: 16.0,
                ),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: <Widget>[
                    Text(
                      'Edit message',
                      style: Theme.of(context).textTheme.headline6,
                    ),
                    Container(
                      height: 30,
                      padding: const EdgeInsets.all(2.0),
                      child: AspectRatio(
                        aspectRatio: 1,
                        child: RawMaterialButton(
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(4),
                          ),
                          elevation: 0,
                          highlightElevation: 0,
                          focusElevation: 0,
                          disabledElevation: 0,
                          hoverElevation: 0,
                          onPressed: () {
                            Navigator.of(context).pop();
                          },
                          fillColor:
                              Theme.of(context).brightness == Brightness.dark
                                  ? Colors.white.withOpacity(.1)
                                  : Colors.black.withOpacity(.1),
                          padding: EdgeInsets.all(4),
                          child: Icon(
                            Icons.close,
                            size: 15,
                            color: StreamChatTheme.of(context)
                                .primaryIconTheme
                                .color,
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
              Padding(
                padding: EdgeInsets.only(
                  bottom: MediaQuery.of(context).viewInsets.bottom,
                ),
                child: editMessageInputBuilder != null
                    ? editMessageInputBuilder(context, message)
                    : MessageInput(
                        editMessage: message,
                        onMessageSent: (_) {
                          FocusScope.of(context).unfocus();
                          Navigator.pop(context);
                        },
                      ),
              ),
            ],
          ),
        );
      },
    );
  }

  Widget _buildReplyButton(BuildContext context) {
    return ListTile(
      title: Text(
        'Thread reply',
        style: Theme.of(context).textTheme.headline6,
      ),
      leading: Icon(
        StreamIcons.sorting_up,
        color: StreamChatTheme.of(context).primaryIconTheme.color,
      ),
      onTap: () {
        Navigator.pop(context);
        if (onThreadTap != null) {
          onThreadTap(message);
        }
      },
    );
  }
}