#!/usr/bin/env ruby

require 'json'
require 'rss'
require 'open-uri'
require 'cgi'
require_relative './../../xrforge.rb'

# Check if a filename is provided
if ARGV.length != 1
  puts "Usage: #{$0} <path/to/experience/somefile.xxx>"
  exit 1
end

filename = ARGV[0]
  
# dont run for each file-update
if ! filename.end_with?("datapackage.json")
  exit 0 
end

begin
  # Change the directory
  Dir.chdir( File.dirname(filename) )
  # Read and parse the JSON file
  data     = JSON.parse( File.read( "datapackage.json" ) )

  data['keywords'].any? do |tag|
    if tag.match?(/@.*@.*\./)  # scan for activitypub handle (@foo@mastodon.online e.g.) 
      APHandle = tag
    end
  end

  if ! APHandle # nothing to do
    exit 0
  end

  APHandle = "@vladh@merveilles.town"

  logfile = File.join( File.dirname(filename), ".xrforge/log.txt" )
  XRForge.log("✅ starting Mastodon post2image", logfile)

  parts  = APHandle.split("@")
  server = parts[2].sub(/@/,"")
  rssUrl = "https://#{server}/@#{parts[1]}.rss"
  XRForge.log("✅ checking #{rssUrl}", logfile)

  feed = RSS::Parser.parse(URI.open(rssUrl, 'User-Agent' => 'Ruby-RSS-Client'))

  puts feed.channel.title 
  puts feed.channel.link

  first_item = feed.items.first
  if first_item
    description = CGI.unescapeHTML(first_item.description.to_s).gsub(/<[^>]*>/, '')
    description = description.length > 150 ? description = description[0,200] + " (..)" : description
  else
    XRForge.log("❌ did not find post", logfile)
    exit 0 
  end
  
  puts description

  # look for first image 
  MEDIA_REGEX = /<media:content url=['"]([^'"]+)['"]/
  img = feed.to_s.match(MEDIA_REGEX)
  if img and img[1] and img[1].match(/(png|jpg)/)
    imgurl = img[1]
  end

  text     = "\n\"#{description}\"\n\n~ #{feed.channel.title}\n#{feed.channel.link}"
  textFile = ".xrforge/mastodon-post.txt" 
  File.open(textFile,'w') do |file|
    file.puts text
  end

  cmd = "magick -size 800x800 -background white -pointsize 48 -interline-spacing 10 -fill \\#555 -gravity center -font /usr/local/lib/ruby/3.4.0/rdoc/generator/template/darkfish/fonts/Lato-Regular.ttf caption:@#{textFile} mastodon-post.png"
  puts cmd
  system(cmd)

  XRForge.log(" ", logfile)

rescue OpenURI::HTTPError => e
  # Handle HTTP errors (e.g., 404 not found, 403 forbidden)
  puts "Error fetching feed: #{e.message}"
  exit
rescue => e
  # Handle other parsing or connection errors
  puts "An error occurred: #{e.message}"
rescue Errno::ENOENT
  puts "File #{filename} not found"
rescue JSON::ParserError
  puts "Error parsing JSON from #{filename}"
rescue => e
  puts "An error occurred: #{e.message}"
end