module Epayco

# File lib/epayco.rb, line 39
def self.request(method, url, extra=nil, params={}, headers={}, switch)
  method = method.to_sym

  if !apiKey || !privateKey || !lang
    raise Error.new('100', lang)
  end

  payload = JSON.generate(params) if method == :post || method == :patch
  params = nil unless method == :get

  # Switch secure or api
  if switch
    if method == :post || method == :patch
      enc = encrypt_aes(payload)
      payload = enc.to_json
    end
    url = @api_base_secure + url
  else
    if method == :post || method == :patch
      rb_hash = JSON.parse(payload)
      rb_hash["test"] = test ? "TRUE" : "FALSE"
      rb_hash["ip"] = local_ip
      payload = rb_hash.to_json
    end
    url = @api_base + url
  end

  headers = {
    :params => params,
    :content_type => 'application/json',
    :type => 'sdk'
  }.merge(headers)

  options = {
    :headers => headers,
    :user => apiKey,
    :method => method,
    :url => url,
    :payload => payload
  }

  # Open library rest client
  begin
    response = execute_request(options)
    return {} if response.code == 204 and method == :delete
    JSON.parse(response.body, :symbolize_names => true)
  rescue RestClient::Exception => e
    handle_errors e
  end
end

# File lib/epayco.rb, line 130
def self.encrypt(str, key)
  cipher = OpenSSL::Cipher.new('AES-128-CBC')
  cipher.encrypt
  iv = "0000000000000000"
  cipher.iv = iv
  cipher.key = key
  str = iv + str
  data = cipher.update(str) + cipher.final
  Base64.urlsafe_encode64(data)
end

# File lib/epayco.rb, line 113
def self.encrypt_aes data
  sandbox = Epayco.test ? "TRUE" : "FALSE"
  @tags = JSON.parse(data)
  @seted = {}
  @tags.each {
    |key, value|
    @seted[lang_key(key)] = encrypt(value, Epayco.privateKey)
  }
  @seted["public_key"] = Epayco.apiKey
  @seted["i"] = Base64.encode64("0000000000000000")
  @seted["enpruebas"] = encrypt(sandbox, Epayco.privateKey)
  @seted["lenguaje"] = "ruby"
  @seted["ip"] = encrypt(local_ip, Epayco.privateKey)
  @seted["p"] = ""
  return @seted
end

# File lib/epayco.rb, line 93
def self.execute_request(options)
  RestClient::Request.execute(options)
end

# File lib/epayco.rb, line 98
def self.handle_errors exception
  body = JSON.parse exception.http_body
  raise Error.new(exception.to_s, body['errors'])
end

# File lib/epayco.rb, line 142
def self.lang_key key
  file = File.read(File.dirname(__FILE__) + '/keylang.json')
  data_hash = JSON.parse(file)
  data_hash[key]
end

# File lib/epayco.rb, line 103
def self.local_ip
    orig, Socket.do_not_reverse_lookup = Socket.do_not_reverse_lookup, true
    UDPSocket.open do |s|
      s.connect '64.233.187.99', 1
      s.addr.last
    end
    ensure
      Socket.do_not_reverse_lookup = orig
 end