import ReactMarkdown from 'react-markdown';
import remarkGfm from 'remark-gfm';
import { cn } from "@/lib/utils";
import { Message } from "@/hooks/use-chat";
import { Bot, User } from "lucide-react";
import { markdownRenderers } from "./markdown-renderers";
import { MessageActions } from "./message-actions";

export function ChatMessage({ message }: { message: Message }) {
  const isUser = message.role === 'user';

  return (
    <div className={cn(
      "group flex w-full gap-4 p-6 relative",
      isUser ? "bg-background" : "bg-muted/30"
    )}>
      <div className="flex-shrink-0 mt-1">
        <div className={cn(
          "w-8 h-8 rounded-sm flex items-center justify-center",
          isUser ? "bg-primary text-primary-foreground" : "bg-secondary text-secondary-foreground"
        )}>
          {isUser ? <User className="w-5 h-5" /> : <Bot className="w-5 h-5" />}
        </div>
      </div>
      <div className="flex-1 overflow-hidden min-w-0">
        <div className="prose dark:prose-invert max-w-none break-words">
          <ReactMarkdown 
            remarkPlugins={[remarkGfm]}
            components={markdownRenderers}
          >
            {(() => {
              let content = message.content || '';
              // Remove metadata tags
              content = content.replace(/<metadata>[\s\S]*?<\/metadata>/gi, '').trim();
              
              // Also remove common prefixes if they appear at the end
              const prefixes = [
                'Bloco oculto de metadados:',
                'Metadata:',
                'Metadados:',
                'Hidden metadata block:',
                'JSON metadata:',
                '---'
              ];
              
              for (const prefix of prefixes) {
                const regex = new RegExp(`${prefix}\\s*$`, 'i');
                if (regex.test(content)) {
                  content = content.replace(regex, '').trim();
                }
              }
              
              return content || message.content;
            })()}
          </ReactMarkdown>
        </div>
      </div>
      
      {/* Actions Toolbar - Absolute positioned or flex end */}
      {!isUser && (
        <div className="absolute top-4 right-4">
          <MessageActions content={message.content} role={message.role} />
        </div>
      )}
    </div>
  );
}