class Issue

# File lib/gem-gratitude.rb, line 9
def self.list
  # Initializes a Markdown parser
  @markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML, autolink: true, hard_wrap: true, fenced_code_blocks: true)

  # Load Gemfile
  gemfile_path="#{Dir.pwd}/Gemfile"

  if !File.exist?(gemfile_path)
    puts "Couldn't find a Gemfile in this directory"
    exit
  end

  # List of all gems
  @gem_list = []

  # Characters to remove to get the pure gem name
  replacements = [ '\'', '"', ',' ]

  # Parse the gem names from the Gemfile
  puts 'Reading Gemfile...'
  File.open(gemfile_path).read.each_line do |line|
    parts = line.split
    if parts[0] == "gem" && parts[0].start_with?("gem")
      gem_name = parts[1]
      replacements.each {|r| gem_name.gsub!(r, '')}
      next if parts[2] =~ /github/
      begin
        gem_spec = Gem::Specification.find_by_name(gem_name)
        @gem_list << {name: gem_name, homepage: gem_spec.homepage} if gem_spec.homepage
      rescue Gem::LoadError
        puts "Could not find gem '#{gem_name}'"
        next
      end
    end
  end

  # Not every gem_spec.homepage is a GitHub repo; try and find a GitHub link
  # Maybe via the GitHub Search API
  @gem_list.each do
    # if !(g[:homepage] =~ /https:\/\/github.com\//)
  end

  # Open HTML output file for writing
  tmp_html = '/tmp/giveback.html'
  file = File.open(tmp_html, 'w')

  # Find all open issues via the GitHub API
  puts 'Querying GitHub API for open issues...'
  @html_content = ''
  @issue_count = 0
  @gem_list.each do |g|
    github_url = g[:homepage].split('/')
    response = HTTParty.get(
      "https://api.github.com/repos/#{github_url[-2]}/#{github_url[-1]}/issues?state=open",
      basic_auth: {username: 'd9eaac28045e8cc35c3f520c7e639caf22b1496e', password: 'x-oauth-basic'},
      headers: { 'User-Agent' => "gem-gratitude" }
    )
    json = JSON.parse(response.body)
    if response.code == 200
      puts "#{g[:name]}: #{g[:homepage]} - #{json.count} open issues"
      json.each do |issue|
        @issue_count += 1

        @labels = '';
        issue['labels'].each do |label|
          @labels << "<span class='label' style='background-color:#{label['color']}'>#{label['name']}</span>"
        end

        @html_content <<
          "<h3>[#{g[:name]}] #{issue['title']}</h3>"\
          "<div><a class='github_link' href=\"#{issue['html_url']}\">View on GitHub: #{issue['title']}</a>"\
          "<div>#{@labels}</div>"\
          "#{@markdown.render(issue['body'].to_s)}</div>"
      end
    end
  end

  # Write to ERB template
  puts 'Generating HTML...'
  erb = ERB.new(File.read(File.expand_path(File.dirname(__FILE__)) + '/../template.erb'))
  file.write erb.result(binding)

  # Open up the resulting HTML file all cross-platform-like
  `xdg-open #{tmp_html} &` if OS.linux?
  `open #{tmp_html}` if OS.mac?
end