/**
 * Simple MIME decoder for compose message box
 * Handles basic email content without creating nested structures
 */

import { simpleParser } from 'mailparser';

interface ParsedContent {
  html: string | null;
  text: string | null;
}

export async function decodeComposeContent(content: string): Promise<ParsedContent> {
  if (!content.trim()) {
    return { html: null, text: null };
  }

  try {
    const parsed = await simpleParser(content);
    return {
      html: parsed.html || null,
      text: parsed.text || null
    };
  } catch (error) {
    console.error('Error parsing email content:', error);
    return {
      html: content,
      text: content
    };
  }
}

export async function encodeComposeContent(content: string): Promise<string> {
  if (!content.trim()) {
    throw new Error('Email content is empty');
  }

  // Create MIME headers
  const mimeHeaders = {
    'MIME-Version': '1.0',
    'Content-Type': 'text/html; charset="utf-8"',
    'Content-Transfer-Encoding': 'quoted-printable'
  };

  // Combine headers and content
  return Object.entries(mimeHeaders)
    .map(([key, value]) => `${key}: ${value}`)
    .join('\n') + '\n\n' + content;
}