#!/usr/bin/python
from sfa.util.xrn import *
from sfa.util.plxrn import *
#from sfa.rspecs.sfa_rspec import SfaRSpec
#from sfa.rspecs.pg_rspec  import PGRSpec
#from sfa.rspecs.rspec_version import RSpecVersion
from sfa.rspecs.rspec import RSpec
from sfa.rspecs.version_manager import VersionManager

class Aggregate:

    api = None
    sites = {}
    nodes = {}
    interfaces = {}
    links = {}
    node_tags = {}
    pl_initscripts = {} 
    prepared=False
    #panos new user options variable
    user_options = {}

    def __init__(self, api, user_options={}):
        self.api = api
        self.user_options = user_options

    def prepare_sites(self, force=False):
        if not self.sites or force:  
            for site in self.api.plshell.GetSites(self.api.plauth):
                self.sites[site['site_id']] = site
    
    def prepare_nodes(self, force=False):
        if not self.nodes or force:
            for node in self.api.plshell.GetNodes(self.api.plauth, {'peer_id': None}):
                self.nodes[node['node_id']] = node

    def prepare_interfaces(self, force=False):
        if not self.interfaces or force:
            for interface in self.api.plshell.GetInterfaces(self.api.plauth):
                self.interfaces[interface['interface_id']] = interface

    def prepare_links(self, force=False):
        if not self.links or force:
            pass

    def prepare_node_tags(self, force=False):
        if not self.node_tags or force:
            for node_tag in self.api.plshell.GetNodeTags(self.api.plauth):
                self.node_tags[node_tag['node_tag_id']] = node_tag

    def prepare_pl_initscripts(self, force=False):
        if not self.pl_initscripts or force:
            for initscript in self.api.plshell.GetInitScripts(self.api.plauth, {'enabled': True}):
                self.pl_initscripts[initscript['initscript_id']] = initscript

    def prepare(self, force=False):
        if not self.prepared or force:
            self.prepare_sites(force)
            self.prepare_nodes(force)
            self.prepare_interfaces(force)
            self.prepare_links(force)
            self.prepare_node_tags(force)
            self.prepare_pl_initscripts()
            # add site/interface info to nodes
            for node_id in self.nodes:
                node = self.nodes[node_id]
                site = self.sites[node['site_id']]
                interfaces = [self.interfaces[interface_id] for interface_id in node['interface_ids']]
                tags = [self.node_tags[tag_id] for tag_id in node['node_tag_ids']]
                node['network'] = self.api.hrn
                node['network_urn'] = hrn_to_urn(self.api.hrn, 'authority+am')
                node['urn'] = hostname_to_urn(self.api.hrn, site['login_base'], node['hostname'])
                node['site_urn'] = hrn_to_urn(PlXrn.site_hrn(self.api.hrn, site['login_base']), 'authority+sa') 
                node['site'] = site
                node['interfaces'] = interfaces
                node['tags'] = tags

        self.prepared = True  

    def get_rspec(self, slice_xrn=None, version = None):
        self.prepare()
        version_manager = VersionManager()
        version = version_manager.get_version(version)
        if not slice_xrn:
            rspec_version = version_manager._get_version(version.type, version.version, 'ad')
        else:
            rspec_version = version_manager._get_version(version.type, version.version, 'manifest')
               
        rspec = RSpec(version=rspec_version, user_options=self.user_options)
        # get slice details if specified
        slice = None
        if slice_xrn:
            slice_hrn, _ = urn_to_hrn(slice_xrn)
            slice_name = hrn_to_pl_slicename(slice_hrn)
            slices = self.api.plshell.GetSlices(self.api.plauth, slice_name)
            if slices:
                slice = slices[0]            

        # filter out nodes with a whitelist:
        valid_nodes = [] 
        for node in self.nodes.values():
            # only doing this becuase protogeni rspec needs
            # to advertise available initscripts 
            node['pl_initscripts'] = self.pl_initscripts

            if slice and node['node_id'] in slice['node_ids']:
                valid_nodes.append(node)
            elif slice and slice['slice_id'] in node['slice_ids_whitelist']:
                valid_nodes.append(node)
            elif not slice and not node['slice_ids_whitelist']:
                valid_nodes.append(node)
    
        rspec.version.add_nodes(valid_nodes)
        rspec.version.add_interfaces(self.interfaces.values()) 
        rspec.version.add_links(self.links.values())

        # add slivers
        if slice_xrn and slice:
            slivers = []
            tags = self.api.plshell.GetSliceTags(self.api.plauth, slice['slice_tag_ids'])

            # add default tags
            for tag in tags:
                # if tag isn't bound to a node then it applies to all slivers
                # and belongs in the <sliver_defaults> tag
                if not tag['node_id']:
                    rspec.version.add_default_sliver_attribute(tag['tagname'], tag['value'], self.api.hrn)

            for node_id in slice['node_ids']:
                try:
                    sliver = {}
                    sliver['hostname'] = self.nodes[node_id]['hostname']
                    sliver['node_id'] = node_id
                    sliver['slice_id'] = slice['slice_id']    
                    sliver['tags'] = []
                    slivers.append(sliver)

                    # add tags for this node only
                    for tag in tags:
                        if tag['node_id'] and (tag['node_id'] == node_id):
                            sliver['tags'].append(tag)
                except:
                    self.api.logger.log_exc('unable to add sliver %s to node %s' % (slice['name'], node_id))
            rspec.version.add_slivers(slivers, sliver_urn=slice_xrn)

        return rspec.toxml()