# usage: tap <command> {options} [args]
#
# examples:
#   tap generate root /path/to/root      # generates a root dir
#   tap run taskname --option input      # runs the 'taskname' task
#
# help:
#   tap help                             # prints this help
#   tap command --help                   # prints help for 'command'

require File.join( File.dirname(__FILE__), "../lib/tap.rb")
require "tap/script"

app = Tap::App.instance
script = Tap::Script.instance

begin
  # configure the app to tap.yml if it exists
  config_file = Tap::Script.config_filepath(Dir.pwd)
  config = Tap::Script.read_config(config_file)
  script.configure_app(config)
rescue(Exception)
  # catch errors and exit gracefully
  # (errors usu from gem loading errors)
  puts "Configuration error: #{$!.message}"
  puts "Check #{config_file} configurations"
  exit(1)
end

# alert the user to the root directory if it's not Dir.pwd
unless app.options.quiet || app.root == File.expand_path(Dir.pwd)
  puts "root: #{app.root}" 
end

#
# run before script
#
begin
  eval(script.config.before.to_s)
rescue
  puts "Error in before script."
  if app.options.debug
    raise 
  else
    puts $!.message
    exit(1)
  end
end

begin
  available_commands = script.config.scripts
  command = ARGV.shift

  case command  
  when "--help", "-h", "help", "?", nil 
    # give some help
    puts Tap::Script.usage(__FILE__)
    puts
    puts "available commands:"

    commands = available_commands.keys
    commands.unshift("help")
    
    print "  "
    puts commands.sort.join("\n  ")
    puts
    puts "version #{Tap::VERSION} -- #{Tap::HOMEPAGE}"
  else
    if available_commands.has_key?(command)
      # run the script, if it exists
      load available_commands[command]
    else
      puts "Unknown command: '#{command}'"
      puts "Type 'tap help' for usage information."
    end
  end
rescue
  if app.options.debug
    raise 
  else
    puts $!.message
    puts "Type 'tap #{command} --help' for usage information."
  end
end

#
# run after script
#
begin
  eval(script.config.after.to_s) 
rescue
  puts "Error in after script."
  if app.options.debug
    raise 
  else
    puts $!.message
    exit(1)
  end
end