#!/usr/bin/env ruby -w

require 'fileutils'

def usage
  puts "Usage: #{$0} <draft-path-or-filename>"
  puts
  puts "Examples:"
  puts "  #{$0} public/drafts/reverse-engineering-photo-urls.md"
  puts
  puts "Available drafts:"
  drafts = Dir.glob('public/drafts/*.md').map { |f| File.basename(f) }
  if drafts.empty?
    puts "  (no drafts found)"
  else
    drafts.each { |d| puts "  #{d}" }
  end
end

if ARGV.empty?
  usage
  abort
end

input_path = ARGV.first

# Handle both full paths and just filenames
if input_path.include?('/')
  draft_path = input_path
  draft_file = File.basename(input_path)
  if input_path.start_with?('posts/')
    abort "Error: '#{input_path}' is already published in posts/ directory"
  end
else
  draft_file = input_path
  draft_path = "public/drafts/#{draft_file}"
end

abort "Error: File not found: #{draft_path}" unless File.exist?(draft_path)

# Update display date timestamp to current time
def ordinal_date(time)
  day = time.day
  suffix = case day
           when 1, 21, 31 then 'st'
           when 2, 22 then 'nd'
           when 3, 23 then 'rd'
           else 'th'
           end
  time.strftime("#{day}#{suffix} %B, %Y")
end
now = Time.now
iso_timestamp = now.strftime('%Y-%m-%dT%H:%M:%S%:z')
human_date = ordinal_date(now)
content = File.read(draft_path)
content.sub!(/^Date:.*$/, "Date: #{human_date}")
content.sub!(/^Timestamp:.*$/, "Timestamp: #{iso_timestamp}")

# Use current year/month for directory, pad with strftime
year_month = now.strftime('%Y-%m')
year, month = year_month.split('-')

target_dir = "posts/#{year}/#{month}"
FileUtils.mkdir_p(target_dir)
target_path = "#{target_dir}/#{draft_file}"

File.write(target_path, content)
FileUtils.rm_f(draft_path)

puts "Published draft: #{draft_path} → #{target_path}"