import 'dart:convert';
import 'package:flutter/material.dart';
import '../services/theme_service.dart';
import '../models/message.dart';

class MessageBubble extends StatelessWidget {
  final Message message;
  final bool showAuthor;
  final void Function(Message)? onReply;

  const MessageBubble({
    super.key,
    required this.message,
    this.showAuthor = true,
    this.onReply,
  });

  @override
  Widget build(BuildContext context) {
    final text = message.content != null
        ? utf8.decode(message.content!)
        : '';

    return Padding(
      padding: const EdgeInsets.only(top: 2, bottom: 2),
      child: InkWell(
        onLongPress: () => _showContextMenu(context),
        borderRadius: BorderRadius.circular(4),
        child: Padding(
          padding: EdgeInsets.only(left: showAuthor ? 0 : 48),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              if (showAuthor) ...[
                const SizedBox(height: 12),
                Row(
                  children: [
                    Container(
                      width: 32,
                      height: 32,
                      decoration: BoxDecoration(
                        color: ThemeService.primary.withOpacity(0.8),
                        borderRadius: BorderRadius.circular(16),
                      ),
                      child: Center(
                        child: Text(
                          (message.authorUsername ?? '?')[0].toUpperCase(),
                          style: const TextStyle(
                            color: Colors.white,
                            fontWeight: FontWeight.w700,
                            fontSize: 14,
                          ),
                        ),
                      ),
                    ),
                    const SizedBox(width: 8),
                    Text(
                      message.authorUsername ?? 'Unknown',
                      style: const TextStyle(
                        color: ThemeService.textPrimary,
                        fontSize: 14,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                    const SizedBox(width: 8),
                    Text(
                      _formatTime(message.createdAt),
                      style: const TextStyle(
                        color: ThemeService.textMuted,
                        fontSize: 11,
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 4),
              ],
              Padding(
                padding: const EdgeInsets.only(left: 40),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    if (message.replyTo != null)
                      Container(
                        padding: const EdgeInsets.all(6),
                        margin: const EdgeInsets.only(bottom: 4),
                        decoration: BoxDecoration(
                          color: ThemeService.surfaceTertiary,
                          borderRadius: BorderRadius.circular(4),
                          border: Border(
                            left: BorderSide(
                              color: ThemeService.primary.withOpacity(0.5),
                              width: 3,
                            ),
                          ),
                        ),
                        child: Text(
                          'Replying to a message',
                          style: const TextStyle(
                            color: ThemeService.textMuted,
                            fontSize: 12,
                          ),
                        ),
                      ),
                    Row(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Expanded(
                          child: message.messageType == 'voice'
                              ? _buildVoiceMessage()
                              : message.messageType == 'image'
                                  ? _buildImageMessage(text)
                                  : Text(
                                      text,
                                      style: const TextStyle(
                                        color: ThemeService.textPrimary,
                                        fontSize: 15,
                                        height: 1.4,
                                      ),
                                    ),
                        ),
                      ],
                    ),
                    if (message.editedAt != null)
                      Text(
                        '(edited)',
                        style: const TextStyle(
                          color: ThemeService.textMuted,
                          fontSize: 11,
                        ),
                      ),
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildVoiceMessage() {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
      decoration: BoxDecoration(
        color: ThemeService.surfaceTertiary,
        borderRadius: BorderRadius.circular(8),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          const Icon(Icons.play_arrow, color: ThemeService.primary, size: 24),
          const SizedBox(width: 8),
          Container(
            width: 120,
            height: 4,
            decoration: BoxDecoration(
              color: ThemeService.textMuted.withOpacity(0.3),
              borderRadius: BorderRadius.circular(2),
            ),
          ),
          const SizedBox(width: 8),
          const Text(
            '0:12',
            style: TextStyle(
              color: ThemeService.textMuted,
              fontSize: 12,
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildImageMessage(String url) {
    return ClipRRect(
      borderRadius: BorderRadius.circular(8),
      child: Image.network(
        url,
        width: 300,
        fit: BoxFit.cover,
        errorBuilder: (_, __, ___) => Container(
          height: 100,
          color: ThemeService.surfaceTertiary,
          child: const Center(
            child: Icon(Icons.broken_image, color: ThemeService.textMuted),
          ),
        ),
        loadingBuilder: (_, child, progress) {
          if (progress == null) return child;
          return Container(
            width: 300,
            height: 200,
            color: ThemeService.surfaceTertiary,
            child: Center(
              child: CircularProgressIndicator(
                value: progress.expectedTotalBytes != null
                    ? progress.cumulativeBytesLoaded /
                        progress.expectedTotalBytes!
                    : null,
                strokeWidth: 2,
              ),
            ),
          );
        },
      ),
    );
  }

  void _showContextMenu(BuildContext context) {
    showModalBottomSheet(
      context: context,
      backgroundColor: ThemeService.surfaceSecondary,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(12)),
      ),
      builder: (ctx) => SafeArea(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            ListTile(
              leading: const Icon(Icons.reply, color: ThemeService.textSecondary),
              title: const Text('Reply',
                  style: TextStyle(color: ThemeService.textPrimary)),
              onTap: () {
                Navigator.pop(ctx);
                onReply?.call(message);
              },
            ),
            ListTile(
              leading: const Icon(Icons.copy, color: ThemeService.textSecondary),
              title: const Text('Copy',
                  style: TextStyle(color: ThemeService.textPrimary)),
              onTap: () {
                Navigator.pop(ctx);
              },
            ),
            ListTile(
              leading: const Icon(Icons.push_pin, color: ThemeService.textSecondary),
              title: const Text('Pin',
                  style: TextStyle(color: ThemeService.textPrimary)),
              onTap: () => Navigator.pop(ctx),
            ),
            ListTile(
              leading:
                  const Icon(Icons.delete, color: ThemeService.danger),
              title: const Text('Delete',
                  style: TextStyle(color: ThemeService.danger)),
              onTap: () => Navigator.pop(ctx),
            ),
          ],
        ),
      ),
    );
  }

  String _formatTime(DateTime dt) {
    final now = DateTime.now();
    final diff = now.difference(dt);

    if (diff.inDays == 0) {
      return '${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}';
    } else if (diff.inDays == 1) {
      return 'Yesterday';
    } else {
      return '${dt.day}/${dt.month}/${dt.year}';
    }
  }
}