import { createStyles } from 'antd-style';
import { ChatMessage } from './ChatMessage';
import { WelcomeScreen } from './WelcomeScreen';
import { ChatInput } from './ChatInput';
import type { Message } from '../types';

const useStyles = createStyles(({ css }) => ({
  container: css`
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
  `,
  messagesWrapper: css`
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 24px;

    &::-webkit-scrollbar {
      width: 8px;
    }

    &::-webkit-scrollbar-track {
      background: transparent;
    }

    &::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.08);
      border-radius: 4px;
    }

    &::-webkit-scrollbar-thumb:hover {
      background: rgba(255, 255, 255, 0.15);
    }
  `,
  messages: css`
    max-width: 52rem;
    margin: 0 auto;
    width: 100%;
  `,
  inputArea: css`
    padding: 24px;
    background: rgba(17, 17, 17, 0.7);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 -16px 48px rgba(0, 0, 0, 0.6);
  `,
  inputContainer: css`
    max-width: 52rem;
    margin: 0 auto;
  `,
  disclaimer: css`
    text-align: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.45);
    margin-top: 16px;
  `,
}));

interface ChatContainerProps {
  messages: Message[];
  isTyping: boolean;
  onSendMessage: (content: string) => void;
}

export const ChatContainer: React.FC<ChatContainerProps> = ({
  messages,
  isTyping,
  onSendMessage,
}) => {
  const { styles } = useStyles();

  const handleSend = (content: string) => {
    if (content.trim()) {
      onSendMessage(content);
    }
  };

  return (
    <div className={styles.container}>
      <div className={styles.messagesWrapper}>
        <div className={styles.messages}>
          {messages.length === 0 ? (
            <WelcomeScreen />
          ) : (
            <>
              {messages.map((message) => (
                <ChatMessage key={message.id} message={message} />
              ))}
              {isTyping && (
                <ChatMessage
                  message={{
                    id: 'typing',
                    role: 'assistant',
                    content: '...',
                    timestamp: new Date(),
                  }}
                  isTyping
                />
              )}
            </>
          )}
        </div>
      </div>

      <div className={styles.inputArea}>
        <div className={styles.inputContainer}>
          <ChatInput
            placeholder="Envía un mensaje..."
            onSend={handleSend}
          />
          <div className={styles.disclaimer}>
            Nexus puede cometer errores. Considera verificar información importante.
          </div>
        </div>
      </div>
    </div>
  );
};