class Rangefinder

# File lib/rangefinder.rb, line 8
def initialize(options)
  options[:filenames] ||= [] # don't blow up if we're called with no files

  @options  = options
  @bigquery = Rangefinder::Bigquery.new(options)

  if options[:filenames].size == 1 and File.directory?(options[:filenames].first)
    options[:filenames] = Dir.glob("#{options[:filenames].first}/**/*")
  end
end

# File lib/rangefinder.rb, line 45
def analyze(files)
  files.map do |filename|
    case File.extname(filename).downcase
    when '.pp'
      kind, name = Rangefinder::Parser::Puppet.new(filename).evaluate!
    when '.rb'
      kind, name = Rangefinder::Parser::Ruby.new(filename).evaluate!
    else
      $logger.info "Unknown file type: #{filename}"
      next
    end

    if kind.nil? or name.nil?
      $logger.info "Skipping #{filename}"
      next
    end

    @bigquery.find(namespace(filename), kind, name)
  end
end

# File lib/rangefinder.rb, line 121
def debug
  require 'pry'
  binding.pry
end

# File lib/rangefinder.rb, line 69
def namespace(path)
  segments = Pathname(File.expand_path(path)).each_filename.to_a
  index    = segments.rindex {|item| ['lib','manifests'].include? item}

  return nil if index.nil?

  modroot  = segments[0...index]
  pathname = File.join([File::SEPARATOR, modroot, 'metadata.json'].flatten)
  metadata = JSON.parse(File.read(pathname)) rescue {}
  metadata['name']
end

# File lib/rangefinder.rb, line 90
def pretty_print(results)
  output  = "[#{results[:name]}] is a _#{results[:kind]}_\n"
  output << "==================================\n"

  if results[:exact].empty? and results[:near].empty?
    output << "with no external impact.\n\n"
  end

  unless results[:puppetfile].empty?
    output << "The enclosing module is declared in #{results[:puppetfile]} indexed public Puppetfiles\n\n"
  end

  unless results[:exact].empty?
    output << "Breaking changes to this file WILL impact these modules:\n"
    results[:exact].each do |row|
      output << "  * #{row[:module]} (#{row[:repo]})\n"
    end
    output << "\n"
  end

  unless results[:near].empty?
    output << "Breaking changes to this file MAY impact these modules:\n"
    results[:near].each do |row|
      output << "  * #{row[:module]} (#{row[:repo]})\n"
    end
    output << "\n"
  end

  output
end

# File lib/rangefinder.rb, line 81
def print_line(results)
  sprintf("%-#{@maxlen}s %-12s %-8s %-7s %-12s\n",
          results[:name],
          results[:kind],
          results[:exact].size,
          results[:near].size,
          results[:puppetfile])
end

# File lib/rangefinder.rb, line 19
def render!
  results = analyze(@options[:filenames]).compact
  @maxlen = (results.map {|res| res[:name].length} + [12]).max # Take into account the 'item name' label

  if @options[:render] == :summarize
    printf("%-#{@maxlen}s %-12s %-8s %-7s %-12s\n", 'Item Name', 'Kind', 'Exact', 'Near', 'Puppetfiles')
    puts '=' * (@maxlen+42)
  end

  results.each do |item|
    case @options[:render]
    when :human
      puts pretty_print(item)
    when :summarize
      puts print_line(item)
    when :json
      puts JSON.pretty_generate(item)
    when :yaml
      require 'yaml'
      puts item.to_yaml
    else
      raise "Invalid render type (#{@options[:render]})."
    end
  end
end