class DownloadTV::Configuration

def breaking_changes?(version)
  DownloadTV::VERSION.split('.').zip(version.split('.')).find_index { |x, y| y > x }&.< 2
end

def change_configuration
  if @content[:myepisodes_user]
    print "Enter your MyEpisodes username (#{@content[:myepisodes_user]}) : "
  else
    print 'Enter your MyEpisodes username: '
  end
  @content[:myepisodes_user] = STDIN.gets.chomp
  print 'Save cookie? (y)/n: '
  @content[:cookie] = !(STDIN.gets.chomp.casecmp? 'n')
  if @content[:ignored]
    puts "Enter a comma-separated list of shows to ignore: (#{@content[:ignored]})"
  else
    puts 'Enter a comma-separated list of shows to ignore: '
  end
  @content[:ignored] = STDIN.gets.chomp.split(',').map(&:strip).map(&:downcase)
  STDOUT.flush
  # When modifying existing config, keeps previous values
  # When creating new one, sets defaults
  @content[:auto] ||= true
  @content[:subs] ||= true
  @content[:grabber] ||= 'TorrentAPI'
  @content[:date] ||= Date.today - 1
  @content[:version] = DownloadTV::VERSION
  serialize
end

def initialize(content = {}, force_change = false)
  FileUtils.mkdir_p(File.join(ENV['HOME'], '.config', 'download_tv'))
  @config_path = content[:path] || File.join(ENV['HOME'], '.config', 'download_tv', 'config')
  if File.exist? @config_path
    load_config
    @content.merge!(content) unless content.empty?
    @content[:ignored]&.map!(&:downcase)
    change_configuration if force_change
  else
    @content = content
    change_configuration
  end
end

def load_config
  source = File.read(@config_path)
  @content = JSON.parse(source, symbolize_names: true)
  @content[:date] = Date.parse(@content[:date]) if @content[:date]
  change_configuration if !@content[:version] || breaking_changes?(@content[:version])
rescue JSON::ParserError
  @content = {}
  change_configuration
  retry
end

def print_config
  @content.each { |k, v| puts "#{k}: #{v}" }
end

def serialize
  File.write(@config_path, JSON.generate(@content))
end