fs = require 'fs'
path = require 'path'
stdio = require 'stdio'

conf = {}
mediatorConf = {}

if process.env.NODE_ENV isnt 'test'
  ops = stdio.getopt
    conf:
      key: 'c'
      args: 1
      description: 'The backend configuration to use. See config/default.json for an example.'
    mediatorConf:
      key: 'm'
      args: 1
      description: 'The mediator configuration to use. See config/mediator.json for an example.'


confFile = null


# Update the conf map with updated values
# Keys that contain dashes will be split and nested in the map,
# e.g. if the updated config is { "server-host": "localhost" }
# then the conf map will end up as {"server":{ "host": "localhost"}}
#
# TODO the split should be on period, not dash. but mongo doesn't like these
# https://github.com/jembi/openhim-core-js/issues/566
updateConf = (config) ->
  for param of config
    _spl = param.split '-'
    _confI = conf

    for key, i in _spl
      if i is _spl.length-1
        _confI[key] = config[param]
      else
        if not _confI[key] then _confI[key] = {}
        _confI = _confI[key]


load = () ->
  # conf
  if ops?.conf?
    confFile = ops.conf
  else if process.env.NODE_ENV is 'development'
    confFile = path.resolve "#{global.appRoot}/config", 'development.json'
  else if process.env.NODE_ENV is 'test'
    confFile = path.resolve "#{global.appRoot}/config", 'test.json'
  else
    confFile = path.resolve "#{global.appRoot}/config", 'default.json'

  conf = JSON.parse fs.readFileSync confFile

  # mediator conf
  if ops?.mediatorConf?
    mediatorConfFile = ops.mediatorConf
  else
    mediatorConfFile = path.resolve "#{global.appRoot}/config", 'mediator.json'

  mediatorConf = JSON.parse fs.readFileSync mediatorConfFile
  if mediatorConf.config?
    updateConf mediatorConf.config


exports.getConf = -> conf
exports.getConfName = -> confFile
exports.getMediatorConf = -> mediatorConf
exports.load = load
exports.updateConf = updateConf