#!/usr/bin/env ruby

$LOAD_PATH.unshift("#{__dir__}/../lib")

require 'logger'
require 'optparse'
require 'unitf/tag'

logger = Logger.new($stdout)

actions = []
files = []
opt = {
  recursive: false,
  force: false
}

targets = OptionParser.new do |opts|
  opts.on('-r', '--recursive', 'Auto Cover') do
    opt[:recursive] = true
  end

  opts.on('--dump', 'Dump Tags') do
    opt[:dump] = true
  end

  opts.on('-d', '--debug', 'Debug') do
    UnitF::Tag.logger.level = Logger::DEBUG
  end

  opts.on('-j', '--json', 'JSON Output') do
    opt[:format] = :json
  end

  opts.on('-l', '--line', 'Single Line Output') do
    opt[:format] = :line
  end

  opts.on('--auto_cover', 'Auto Cover') do
    actions << :auto_cover
  end

  opts.on('--delete_cover', 'Delete Cover') do
    actions << :delete_cover
  end

  opts.on('--auto_tag', 'Auto Tag') do
    actions << :auto_tag
  end

  opts.on('-f', '--force', 'Force') do
    opt[:force] = true
  end

  opts.on('--artist ARTIST', 'Artist') do |arg|
    actions << :artist
    opt[:artist] = arg
  end

  opts.on('--album ALBUM', 'Album') do |arg|
    actions << :album
    opt[:album] = arg
  end

  opts.on('--title TITLE', 'Song Title') do |arg|
    actions << :title
    opt[:title] = arg
  end

  opts.on('--genre GENRE', 'Genre') do |arg|
    actions << :genre
    opt[:genre] = arg
  end
end.parse!

files = UnitF::Tag::FileSet.new(targets)

if files.size.zero?
  logger.error('Cannot find any files to operate on')
end

if actions.size.zero?
  UnitF::Tag.list(files, format: opt[:format])
  exit 0
end

files.each do |file|
  logger.info("Processing file: #{file}")
  file.open do |o|
    actions.each do |action|
      case action
      when :delete_cover
        logger.info('Delete cover')
        o.delete_cover!
      when :auto_cover
        unless o.cover?
          logger.info("Auto Cover #{file.cover_path}")
          begin
            o.auto_cover!
          rescue => e
            logger.error("Failed to auto-cover file #{e}")
          end
        end
      when :auto_tag
        logger.info('Auto Tag')
        o.auto_tag!
      when :artist
        logger.info("Setting artist to #{opt[:artist]}")
        o.tag.artist = opt[:artist]
      when :album
        logger.info("Setting album to #{opt[:album]}")
        o.tag.album = opt[:album]
      when :title
        logger.info("Setting title to #{opt[:title]}")
        o.tag.title = opt[:title]
      when :genre
        logger.info("Setting genre to #{opt[:genre]}")
        o.tag.genre = opt[:genre]
      when :track
        logger.info("Setting track to #{opt[:track]}")
        o.tag.genre = opt[:track]
      end
    end
    o.save || logger.error("Unable to save changes to #{file}")
  end
end