import React from 'react';
import { Message } from '../types';
import { User, Bot, Sparkles } from 'lucide-react';

interface MessageListProps {
  messages: Message[];
}

export const MessageList: React.FC<MessageListProps> = ({ messages }) => {
  const formatMessage = (content: string) => {
    // Split by solution tags for better formatting
    const parts = content.split(/(<start_working_out>|<end_working_out>|<SOLUTION>|<\/SOLUTION>)/g);
    
    return parts.map((part, idx) => {
      if (part === '<start_working_out>') {
        return (
          <div key={idx} className="inline-flex items-center gap-2 text-primary-600 dark:text-primary-400 font-semibold mt-3 mb-2">
            <Sparkles size={16} className="flex-shrink-0" />
            <span className="leading-none">Düşünme Süreci</span>
          </div>
        );
      } else if (part === '<end_working_out>') {
        return null;
      } else if (part === '<SOLUTION>') {
        return (
          <div key={idx} className="inline-flex items-center gap-2 text-green-600 dark:text-green-400 font-semibold mt-4 mb-2">
            <svg className="w-4 h-4 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
            </svg>
            <span className="leading-none">Çözüm</span>
          </div>
        );
      } else if (part === '</SOLUTION>') {
        return null;
      } else if (part.trim()) {
        return <div key={idx} className="whitespace-pre-wrap leading-relaxed">{part.trim()}</div>;
      }
      return null;
    });
  };

  if (messages.length === 0) {
    return (
      <div className="flex-1 flex items-center justify-center text-gray-400 dark:text-gray-600 bg-gray-50 dark:bg-gray-900">
        <div className="text-center max-w-md px-4">
          <div className="w-20 h-20 bg-gradient-to-br from-primary-100 to-primary-200 dark:from-primary-900/30 dark:to-primary-800/30 rounded-2xl flex items-center justify-center mx-auto mb-4">
            <Bot size={40} className="text-primary-600 dark:text-primary-400" />
          </div>
          <h3 className="text-xl font-semibold text-gray-700 dark:text-gray-300 mb-2">
            Sohbete Başlayın
          </h3>
          <p className="text-sm text-gray-500 dark:text-gray-400">
            Türkçe AI modeliyle muhakeme sorularınızı sorun ve detaylı açıklamalar alın
          </p>
        </div>
      </div>
    );
  }

  return (
    <div className="flex-1 overflow-y-auto px-4 py-6 space-y-6 bg-white dark:bg-gray-950">
      <div className="max-w-3xl mx-auto space-y-6">
        {messages.map((message, idx) => {
          if (message.role === 'system') return null;

          return (
            <div
              key={idx}
              className="flex gap-4 group"
            >
              {/* Avatar */}
              <div className="flex-shrink-0">
                {message.role === 'assistant' ? (
                  <div className="w-7 h-7 bg-primary-600 rounded-sm flex items-center justify-center">
                    <Bot size={16} className="text-white" />
                  </div>
                ) : (
                  <div className="w-7 h-7 bg-gray-700 dark:bg-gray-600 rounded-sm flex items-center justify-center">
                    <User size={16} className="text-white" />
                  </div>
                )}
              </div>

              {/* Message Content */}
              <div className="flex-1 min-w-0 pt-1">
                {message.image && (
                  <img
                    src={message.image}
                    alt="User upload"
                    className="max-w-sm rounded-lg mb-3 border border-gray-200 dark:border-gray-700"
                  />
                )}
                <div className="text-sm text-gray-800 dark:text-gray-200 leading-relaxed">
                  {message.role === 'assistant' ? (
                    formatMessage(message.content)
                  ) : (
                    <div className="whitespace-pre-wrap">{message.content}</div>
                  )}
                </div>
              </div>
            </div>
          );
        })}
      </div>
    </div>
  );
};