#!/usr/bin/env ruby

# for dev purposes
require 'bundler/setup' if ENV['HONEY_FORMAT_GEM_DEV']
require 'honey_format'

input_path = ARGV.first

columns = nil
output_path = nil
delimiter = ','

require 'optparse'

OptionParser.new do |parser|
  parser.banner = "Usage: honey_format [file.csv] [options]"
  parser.default_argv = ARGV

  parser.on("--csv=input.csv", String, "CSV file") do |value|
    input_path = value
  end

  parser.on("--columns=id,name", Array, "Select columns.") do |value|
    columns = value
  end

  parser.on("--output=output.csv", String, "CSV output (STDOUT otherwise)") do |value|
    output_path = value
  end

  parser.on("--delimiter=,", String, "CSV delimiter (default: ,)") do |value|
    delimiter = value
  end

  parser.on("-h", "--help", "How to use") do
    puts parser
    exit
  end

  parser.on_tail('--version', 'Show version') do
    puts "HoneyFormat version #{HoneyFormat::VERSION}"
    exit
  end

  # No argument, shows at tail. This will print an options summary.
  parser.on_tail("-h", "--help", "Show this message") do
    puts parser
    exit
  end
end.parse!

csv = HoneyFormat::CSV.new(File.read(input_path), delimiter: delimiter)
csv_string = csv.to_csv(columns: columns.map(&:to_sym))
if output_path
  File.write(output_path, csv_string)
else
  puts csv_string
end