#!/usr/bin/awk -f

# Primary email processor using AWK
# Lightweight, portable text processing for cleaning up email content

{
    # Remove URL defense wrappers step by step
    gsub(/https:\/\/urldefense\.com\/v3\/__/, "")
    gsub(/__[^[:space:]]*/, "")
    
    # Extract and shorten URLs to domains
    # This processes all URLs in the line
    while (match($0, /https?:\/\/[^\/[:space:]]+/)) {
        url = substr($0, RSTART, RLENGTH)
        # Extract domain (remove protocol)
        domain = url
        gsub(/^https?:\/\//, "", domain)
        # Replace this URL with [domain]
        sub(url, "[" domain "]", $0)
    }
    
    # Remove any remaining URL paths after domain extraction
    gsub(/\][^[:space:]]*/, "]")
    
    # Remove mailto links
    gsub(/mailto:[^[:space:]]*/, "")
    
    # Clean up email headers - make them bold
    if (/^From:/) { gsub(/^From:[[:space:]]*/, "**From:** ") }
    if (/^To:/) { gsub(/^To:[[:space:]]*/, "**To:** ") }
    if (/^Subject:/) { gsub(/^Subject:[[:space:]]*/, "**Subject:** ") }
    if (/^Date:/) { gsub(/^Date:[[:space:]]*/, "**Date:** ") }
    
    # Skip empty lines
    if (/^[[:space:]]*$/) next
    
    print
}