'use client';

import React, { useMemo, CSSProperties } from 'react';
import { renderEmailContent } from '@/lib/utils/email-utils';
import { EmailContent } from '@/types/email';

interface EmailContentDisplayProps {
  content: EmailContent | any;
  className?: string;
  showQuotedText?: boolean;
  type?: 'html' | 'text' | 'auto';
  debug?: boolean;
}

/**
 * Unified component for displaying email content in a consistent way
 * This handles both HTML and plain text content with proper styling
 */
const EmailContentDisplay: React.FC<EmailContentDisplayProps> = ({
  content,
  className = '',
  showQuotedText = true,
  type = 'auto',
  debug = false
}) => {
  // Normalize the content to our standard format if needed
  const normalizedContent = useMemo(() => {
    try {
      // Handle different input types
      if (!content) {
        return {
          html: undefined,
          text: 'No content available',
          isHtml: false,
          direction: 'ltr'
        } as EmailContent;
      }
      
      // If content is already in our EmailContent format
      if (content && 
          typeof content === 'object' && 
          'text' in content && 
          'isHtml' in content) {
        return content as EmailContent;
      }
      
      // Special case for email message with content property
      if (content && typeof content === 'object' && content.content && 
          typeof content.content === 'object' && 
          'text' in content.content && 
          'isHtml' in content.content) {
        return content.content as EmailContent;
      }
      
      // Special case for simple string content
      if (typeof content === 'string') {
        return {
          text: content,
          isHtml: content.trim().startsWith('<'),
          direction: 'ltr'
        } as EmailContent;
      }
      
      // For HTML/text properties
      if (content && typeof content === 'object') {
        if (content.html || content.text) {
          return {
            html: content.html,
            text: content.text || '',
            isHtml: !!content.html,
            direction: 'ltr'
          } as EmailContent;
        }
      }
      
      // Fallback
      console.warn('EmailContentDisplay: Unable to properly normalize content format');
      return {
        text: 'Content format not supported',
        isHtml: false,
        direction: 'ltr'
      } as EmailContent;
    } catch (error) {
      console.error('Error normalizing content in EmailContentDisplay:', error);
      return {
        html: undefined,
        text: `Error processing email content: ${error instanceof Error ? error.message : 'Unknown error'}`,
        isHtml: false,
        direction: 'ltr'
      } as EmailContent;
    }
  }, [content]);
  
  // Render the normalized content
  const htmlContent = useMemo(() => {
    if (!normalizedContent) return '';
    
    try {
      // Override content type if specified
      let contentToRender: EmailContent = { ...normalizedContent };
      
      if (type === 'html' && !contentToRender.isHtml) {
        // Force HTML rendering for text content
        contentToRender = {
          ...contentToRender,
          isHtml: true,
          html: `<p>${contentToRender.text.replace(/\n/g, '<br>')}</p>`
        };
      } else if (type === 'text' && contentToRender.isHtml) {
        // Force text rendering
        contentToRender = {
          ...contentToRender,
          isHtml: false
        };
      }
      
      return renderEmailContent(contentToRender);
    } catch (error) {
      console.error('Error rendering content in EmailContentDisplay:', error);
      return `<div class="error-message p-4 text-red-500">Error rendering email content: ${error instanceof Error ? error.message : 'Unknown error'}</div>`;
    }
  }, [normalizedContent, type]);
  
  // Apply quoted text styling if needed
  const containerStyle: CSSProperties = showQuotedText 
    ? {} 
    : { maxHeight: '400px', overflowY: 'auto' };
  
  return (
    <div 
      className={`email-content-display ${className} ${showQuotedText ? 'quoted-text' : ''}`}
      style={containerStyle}
    >
      <div 
        className="email-content-inner"
        dangerouslySetInnerHTML={{ __html: htmlContent }} 
      />
      
      {/* Debug output if enabled */}
      {debug && (
        <div className="content-debug mt-4 p-2 text-xs bg-gray-100 border rounded">
          <p><strong>Content Type:</strong> {typeof content}</p>
          {typeof content === 'object' && (
            <p><strong>Keys:</strong> {Object.keys(content).join(', ')}</p>
          )}
          <p><strong>Normalized:</strong> {normalizedContent?.isHtml ? 'HTML' : 'Text'}</p>
          <p><strong>Direction:</strong> {normalizedContent?.direction}</p>
          <p><strong>Has HTML:</strong> {!!normalizedContent?.html}</p>
          <p><strong>Text Length:</strong> {normalizedContent?.text?.length || 0}</p>
        </div>
      )}
      
      <style jsx>{`
        .email-content-display {
          width: 100%;
        }
        
        .email-content-display.quoted-text {
          opacity: 0.85;
          font-size: 0.95em;
        }
        
        .email-content-inner :global(img) {
          max-width: 100%;
          height: auto;
        }
        
        .email-content-inner :global(table) {
          max-width: 100%;
          border-collapse: collapse;
          margin-bottom: 1rem;
        }
        
        .email-content-inner :global(td),
        .email-content-inner :global(th) {
          padding: 0.5rem;
          border: 1px solid #ddd;
        }
        
        .content-debug {
          font-family: monospace;
          color: #666;
        }
      `}</style>
    </div>
  );
};

export default EmailContentDisplay;