#!/usr/bin/env ruby
# encoding: UTF-8

# (c) Copyright 2014 Hewlett-Packard Development Company, L.P.
#
#    Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.

require 'rubygems'
require 'fog'
require 'require_relative'

require_relative 'yaml_parse.rb'
include YamlParse

#
# Connection module
#

class ForjConnection

   attr_accessor :oCompute
   attr_accessor :oNetwork

   def initialize(oConfig)

     sAccountName = oConfig.get('account_name')
     @provider='HP' # TODO: Support multiple provider. (Generic Provider object required)
     sAccountName = oConfig.get('provider') if not sAccountName
     sAccountName = 'hpcloud' if not sAccountName

     @credentials = get_credentials(sAccountName)
     oSSLError=SSLErrorMgt.new

     # Trying to get Compute object

     Logging.debug("compute: Connecting to '%s' - Project '%s'" % [@provider, @credentials['tenant_id']])
     begin
        @oCompute=Fog::Compute.new({
          :provider        => @provider,
          :hp_access_key   => @credentials['access_key'],
          :hp_secret_key   => @credentials['secret_key'],
          :hp_auth_uri     => @credentials['auth_uri'],
          :hp_tenant_id    => @credentials['tenant_id'],
          :hp_avl_zone     => @credentials['availability_zone'],
          :version         => 'v2'
        })
     rescue => e
       if not oSSLError.ErrorDetected(e.message,e.backtrace)
          retry
       end
       Logging.fatal(1, 'Unable to connect.')
     end

     # Trying to get Network object
     Logging.debug("HP network: Connecting to '%s' - Project '%s'" % [@provider, @credentials['tenant_id']])
     begin
       @oNetwork=Fog::HP::Network.new({
          :hp_access_key   => @credentials['access_key'],
          :hp_secret_key   => @credentials['secret_key'],
          :hp_auth_uri     => @credentials['auth_uri'],
          :hp_tenant_id    => @credentials['tenant_id'],
          :hp_avl_zone     => @credentials['availability_zone']
       })
     rescue => e
       if not oSSLError.ErrorDetected(e.message,e.backtrace)
          retry
       end
       Logging.fatal(1, 'Unable to connect.')
     end

   end

end

def get_credentials(sAccountName)
  # TODO: Should support forj credentials. not hpcloud credentials.

  raise 'Internal Error: Missing sAccountName' if not sAccountName

  creds = File.expand_path('~/.hpcloud/accounts/%s' % [sAccountName])
  if not File.exists?(creds)
     Logging.fatal(1, "'%s' was not configured. Did you executed 'forj setup %s'? Please do it and retry." % [sAccountName, sAccountName])
  end
  template = YAML.load_file(creds)
  credentials = Hash.new

  begin
    credentials['access_key'] = template[:credentials][:account_id]
    credentials['secret_key'] = template[:credentials][:secret_key]
    credentials['auth_uri'] = template[:credentials][:auth_uri]
    credentials['tenant_id'] = template[:credentials][:tenant_id]
    credentials['availability_zone'] = template[:regions][:compute]
  rescue => e
    Logging.error("%s\n%s" % [e.message, e.backtrace.join("\n")])
    puts 'your credentials are not configured, delete the file %s and run forj setup again' % [creds]
  end
  credentials
end