fs = require 'fs'
path = require 'path'
_ = require 'underscore'

{ defaults } = require '../settings'
argv = {}

@read = ->
  global.settings = {}
  read_argv()
  merge settings, defaults
  set_root_folder()
  merge_user_settings()
  merge settings, argv

###
# Command line
###

read_argv = ->
  
  usage = '''

  Usage: frank [docs] [options] 

  Docs: [docs.root\\[docs.type]]

    shortcut to set root & type properties in settings.docs 

    --docs.root              docs root folder [.]
    --docs.type              extension of doc files [*.txt]

  Options: 

    these become settings properties
    
    -h, --help               output usage information
    -r, --report <name>      select report output [console]
    -o, --only <pattern>     only run docs matching <pattern>
  '''

  argv = require('optimist')
    .alias('h', 'help')
    .alias('r', 'report')
    .alias('o', 'only')
    .argv

  if argv.help?
    console.log usage
    process.exit()

###
# Root Folder
###

set_root_folder = ->
  return unless argv._.length
  settings.docs.root = argv._[0]
  ext = path.extname settings.docs.root
  if ext.length
    settings.docs.root = path.dirname settings.docs.root
    settings.docs.type = ext
  settings.code.root = settings.docs.root

###
# User settings
###

merge_user_settings = ->
  return unless has_user_settings()
  merge settings, user_settings()

user_settings_file = -> path.resolve settings.docs.root, 'settings.coffee'
has_user_settings = -> fs.existsSync user_settings_file()
user_settings = -> require(user_settings_file()).settings

merge = (one, another) ->
  for property, value of another
    if is_object(value) and is_object(one[property])
      merge one[property], value
    else
      one[property] = value

is_object = (o) -> toString.call(o) is '[object Object]'