#!/usr/bin/env ruby
# frozen_string_literal: true

$LOAD_PATH.unshift(File.expand_path("../lib", __dir__))

require "mdcat"
require "tty-markdown"

BANNER = %{
          _         _
 _ __  __| |__ __ _| |_
| '  \/ _` / _/ _` |  _|
|_|_|_\__,_\__\__,_|\__|
version (#{Mdcat::VERSION})
}

def help
  puts %(
#{BANNER}

USAGE
mdcat <file>

COMMANDS
  mdcat -h, help               show this help message

EXAMPLES
  `mdcat README.md`            for printing to stdout
  `mdcat README.md | less`     for paging long documents
  )
end

# commands
if ARGV[0] == "-h" || ARGV[0] == "help"
  help and exit(0)
end

# validations
file_path = ARGV[0]
help and exit(1) if file_path.nil?

file = File.expand_path(file_path)
unless File.exist?(file)
  help
  puts "File not found: #{file}"
  exit 1
end

# proessing file and output
puts TTY::Markdown.parse_file(file)