import 'package:flutter/material.dart';
import 'dart:io';
import 'package:emoji_picker_flutter/emoji_picker_flutter.dart';
import '../models/message.dart';
import 'package:flutter/foundation.dart' as foundation;
import '../../../core/theme/app_colors.dart';
import 'reply_bar.dart';

class MessageInputWidget extends StatelessWidget {
  final TextEditingController messageController;
  final FocusNode focusNode;
  final bool isUploading;
  final File? selectedImage;
  final bool showEmojiKeyboard;
  final bool isReplying;
  final Message? replyToMessage;
  final VoidCallback onSend;
  final VoidCallback onImageOptions;
  final VoidCallback onEmojiToggle;
  final VoidCallback onClearImage;
  final VoidCallback onCancelReply;
  final Color themeColor;

  const MessageInputWidget({
    Key? key,
    required this.messageController,
    required this.focusNode,
    required this.isUploading,
    required this.selectedImage,
    required this.showEmojiKeyboard,
    required this.isReplying,
    required this.replyToMessage,
    required this.onSend,
    required this.onImageOptions,
    required this.onEmojiToggle,
    required this.onClearImage,
    required this.onCancelReply,
    required this.themeColor,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    // Wrap everything in a Column to contain emoji keyboard
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        // Selected image preview
        if (selectedImage != null) _buildImagePreview(),
        
        // Reply bar
        if (isReplying) _buildReplyBar(),
        
        // Input bar
        Container(
          padding: const EdgeInsets.symmetric(horizontal: 8.0, vertical: 6.0),
          decoration: BoxDecoration(
            color: Colors.white,
            boxShadow: [
              BoxShadow(
                color: Colors.black.withOpacity(0.05),
                blurRadius: 3,
                offset: Offset(0, -1),
              ),
            ],
          ),
          child: SafeArea(
            top: false,
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.end,
              children: [
                // Emoji button
                IconButton(
                  icon: Icon(
                    showEmojiKeyboard ? Icons.keyboard : Icons.emoji_emotions_outlined,
                    color: themeColor,
                  ),
                  onPressed: onEmojiToggle,
                  padding: EdgeInsets.zero,
                  constraints: BoxConstraints(
                    minWidth: 36,
                    minHeight: 36,
                  ),
                ),
                
                // Text field
                Expanded(
                  child: ConstrainedBox(
                    constraints: BoxConstraints(
                      maxHeight: 120.0, // Limit max height
                    ),
                    child: TextField(
                      controller: messageController,
                      focusNode: focusNode,
                      minLines: 1,
                      maxLines: 5, // Allow multiple lines but not too many
                      textCapitalization: TextCapitalization.sentences,
                      decoration: InputDecoration(
                        hintText: 'Ketik pesan...',
                        border: InputBorder.none,
                        contentPadding: EdgeInsets.symmetric(horizontal: 8.0, vertical: 10.0),
                      ),
                    ),
                  ),
                ),
                
                // Attachment button
                IconButton(
                  icon: Icon(
                    Icons.attach_file,
                    color: themeColor,
                  ),
                  onPressed: onImageOptions,
                  padding: EdgeInsets.zero,
                  constraints: BoxConstraints(
                    minWidth: 36,
                    minHeight: 36,
                  ),
                ),
                
                // Send button
                _buildSendButton(),
              ],
            ),
          ),
        ),
        
        // Emoji keyboard - Wrap in AnimatedContainer for smooth transitions
        AnimatedContainer(
          duration: Duration(milliseconds: 200),
          height: showEmojiKeyboard ? _getEmojiKeyboardHeight(context) : 0,
          child: showEmojiKeyboard ? _buildEmojiPicker(context) : SizedBox(),
        ),
      ],
    );
  }
  
  Widget _buildImagePreview() {
    return Container(
      width: double.infinity,
      padding: EdgeInsets.all(8.0),
      color: Colors.grey[200],
      child: Stack(
        alignment: Alignment.center,
        children: [
          // Image preview with fixed height
          Container(
            height: 150,
            width: double.infinity,
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(8),
              color: Colors.black,
            ),
            child: ClipRRect(
              borderRadius: BorderRadius.circular(8),
              child: Image.file(
                selectedImage!,
                fit: BoxFit.cover,
              ),
            ),
          ),
          
          // Loading indicator
          if (isUploading)
            Container(
              height: 150,
              width: double.infinity,
              color: Colors.black54,
              child: Center(
                child: CircularProgressIndicator(
                  valueColor: AlwaysStoppedAnimation<Color>(Colors.white),
                ),
              ),
            ),
          
          // Close button
          Positioned(
            top: 0,
            right: 0,
            child: Material(
              color: Colors.transparent,
              child: InkWell(
                borderRadius: BorderRadius.circular(20),
                onTap: onClearImage,
                child: Container(
                  padding: EdgeInsets.all(4),
                  decoration: BoxDecoration(
                    color: Colors.black54,
                    shape: BoxShape.circle,
                  ),
                  child: Icon(
                    Icons.close,
                    color: Colors.white,
                    size: 20,
                  ),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }
  
  Widget _buildReplyBar() {
    if (replyToMessage == null) return SizedBox.shrink();
    
    return ReplyBar(
      message: replyToMessage!,
      onCancel: onCancelReply,
    );
  }
  
  Widget _buildSendButton() {
    final bool canSend = messageController.text.trim().isNotEmpty || selectedImage != null;
    
    return GestureDetector(
      onTap: canSend ? onSend : null,
      child: Container(
        width: 36,
        height: 36,
        margin: EdgeInsets.only(left: 4, right: 4),
        decoration: BoxDecoration(
          color: canSend ? themeColor : Colors.grey,
          shape: BoxShape.circle,
        ),
        child: Icon(
          Icons.send,
          color: Colors.white,
          size: 18,
        ),
      ),
    );
  }
  
  Widget _buildEmojiPicker(BuildContext context) {
    return EmojiPicker(
      onEmojiSelected: (category, emoji) {
        messageController.text = messageController.text + emoji.emoji;
      },
      textEditingController: messageController,
      config: Config(
        checkPlatformCompatibility: true,
      ),
    );
  }
  
  // Calculate emoji keyboard height based on screen size and keyboard visibility
  double _getEmojiKeyboardHeight(BuildContext context) {
    final screenHeight = MediaQuery.of(context).size.height;
    final keyboardVisible = MediaQuery.of(context).viewInsets.bottom > 0;
    
    // Calculate safe height for emoji picker
    final double baseHeight = keyboardVisible 
        ? screenHeight * 0.25  // 25% when keyboard visible
        : screenHeight * 0.35; // 35% when keyboard hidden
    
    // Ensure we don't exceed available space
    final availableHeight = screenHeight - 
                          MediaQuery.of(context).viewInsets.bottom - 
                          kToolbarHeight - 100;
    
    return baseHeight.clamp(100.0, availableHeight);
  }
}