#!/usr/bin/env ruby

require "rbnotes"

include Rbnotes

class App
  def initialize
    @gopts = {}
  end

  def options
    @gopts
  end

  def parse_global_options(args)
    while args.size > 0
      arg = args.shift
      case arg
      when "-c", "--conf"
        file = args.shift
        raise ArgumentError, args.unshift(arg) if file.nil?
        file = File.expand_path(file)
        raise ArgumentError, "no such file: %s" % file unless FileTest.exist?(file)
        @gopts[:conf_file] = file
      when "-v", "--version"
        args.clear
        args.unshift("version")
        break
      when "-h", "--help"
        args.clear
        args.unshift("help")
        break
      else
        args.unshift(arg)
        break
      end
    end
  end

  def run(args)
    cmd = args.shift
    Commands.load(cmd).execute(args, Rbnotes.conf(@gopts[:conf_file]))
  end
end

app = App.new
begin
  app.parse_global_options(ARGV)
  app.run(ARGV)
rescue Errno::EPIPE => _
  # Fix issue #61: When the pipeline which rbnotes connects is
  # discarded by the other program, the execption was raised.  It does
  # not end abnormally for rbnotes.  So, just ignores the exception.
  exit 0
rescue NoArgumentError => _
  # Fix issue #80: Typically, this error raises when a command tries
  # to read the standard input for its arguments and gets nil.  It
  # means user wants to cancel to execute.  So, just ignore the error
  # and exit.
  exit 0
rescue MissingArgumentError, MissingTimestampError,
       NoEditorError, ProgramAbortError,
       Textrepo::InvalidTimestampStringError,
       InvalidTimestampPatternError,
       InvalidTimestampPatternAsDateError,
       NoConfFileError,
       NoTemplateFileError,
       ArgumentError,
       Errno::EACCES => e
  puts e.message
  exit 1
end