#!/usr/bin/env ruby
require 'gm/notepad'

require 'optparse'
config = Gm::Notepad::Configuration::CLI_CONFIG_DEFAULTS.clone

command_name = File.basename(__FILE__)

OptionParser.new do |options|
  # This banner is the first line of your help documentation.
  options.set_banner "Usage: #{command_name} [options] [files]\n" \
    "Note taking tool with random table expansion.\n\n" \
    "Examples:\n" \
    "\t$ #{command_name}\n" \
    "\t$ #{command_name} filename \n" \
    "\t$ echo '{name}' | #{command_name}\n\n" \
    "Options:\n"

  options.on_head("-l", "--list_tables", "List tables loaded and exit (Default: #{config[:list_tables].inspect})") do |list_tables|
    config[:list_tables] = list_tables
  end

  options.on("-r", "--report_config", "Dump the configuration data (Default: #{config[:report_config].inspect})") do |report_config|
    config[:report_config] = report_config
  end

  options.on("-pPATH", "--path=PATH", String, "Path(s) for {table_name}.<config.table_extension> files (Default: #{config[:paths].inspect})") do |path|
    config[:paths] << path
  end

  options.on("-fDIR", "--filesystem_directory=DIR", String, "Path to dump tables (Default: #{config[:filesystem_directory].inspect})") do |filesystem_directory|
    # Should we guard that this exists?
    config[:filesystem_directory] = filesystem_directory
  end

  options.on("-xEXT", "--table_extension=EXT", String, "Extension to use for selecting tables (Default: #{config[:table_extension].inspect})") do |table_extension|
    config[:table_extension] = table_extension
  end

  options.on("-dDELIM", "--delimiter=DELIM", String, "Default column delimiter for tables (Default: #{config[:column_delimiter].inspect})") do |column_delimiter|
    map = { "t" => "\t" }
    config[:column_delimiter] = map.fetch(column_delimiter) { column_delimiter }
  end

  options.separator("")
  options.separator("Output options:")
  options.on("-t", "--timestamp", "Append a timestamp to the note (Default: #{config[:with_timestamp].inspect})") do |timestamp|
    config[:with_timestamp] = timestamp
  end

  options.on("--defer_output", "Defer output until system close (Default: #{config[:defer_output].inspect})") do |defer_output|
    config[:defer_output] = defer_output
  end

  options.separator("")
  options.separator("Color options:")

  options.on("-i", "--skip-interactive-color", "Disable color rendering for interactive buffer (Default: #{!config[:interactive_color].inspect})") do |interactive_color|
    config[:interactive_color] = !interactive_color
  end

  options.on("-o", "--with-output-color", "Enable color rendering for output buffer (Default: #{!config[:output_color].inspect})") do |output_color|
    config[:output_color] = output_color
  end

  options.separator("")

  options.on_tail("-h", "--help", "You're looking at it!") do
    $stderr.puts options
    exit 1
  end
end.parse!

if config[:list_tables]
  notepad = Gm::Notepad.new(config.merge(report_config: true))
  notepad.process(input: "+")
  exit(1)
end

begin
  @notepad = Gm::Notepad.new(**config)
  if config.fetch(:skip_readlines)
    input_getter = -> { print "#{config.fetch(:shell_prompt)}  "; ARGF.gets }
  else
    require 'gm/notepad/readline'
    input_getter = Gm::Notepad::Readline.input_getter(**config)
  end
  while input = input_getter.call
  # # Keep reading lines of input as long as they're coming.
    input.each_line do |input|
      begin
        @notepad.process(input: input)
      rescue Errno::EPIPE
        @notepad.close!

        # sysexits(3) specifies that exit code 74 represent an IO error,
        # which is the likely situation
        exit(74)
      end
    end
  end
rescue => e
  $stderr.puts e
ensure
  @notepad.close!
end