import os
import json
import socket
import sys
import time
import traceback
import xmlrpclib
from core.models import Slice, Sliver, ServiceClass, Reservation, Tag, Network, User, Node, Image, Deployment, Site, NetworkTemplate, NetworkSlice

from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt

slice_name_map = {}

def ps_id_to_pl_id(x):
    # Since we don't want the PlanetStack object IDs to conflict with existing
    # PlanetLab object IDs in the CMI, just add 100000 to the PlanetStack object
    # IDs.
    return 100000 + x

def pl_id_to_ps_id(x):
    return x - 100000

def pl_slice_id(slice):
    if slice.name.startswith("princeton_vcoblitz"):
        # 70 is the slice id of princeton_vcoblitz on vicci
        return 70
    else:
        return ps_id_to_pl_id(slice.id)

def ps_slicename_to_pl_slicename(x):
    return slice_name_map.get(x,x)

def filter_fields(src, fields):
    dest = {}
    for (key,value) in src.items():
        if (not fields) or (key in fields):
            dest[key] = value
    return dest

def GetSlices(filter={}):
    ps_slices = Slice.objects.filter(**filter)
    slices = []
    for ps_slice in ps_slices:
        node_ids=[]
        for ps_sliver in ps_slice.slivers.all():
            node_ids.append(ps_id_to_pl_id(ps_sliver.node.id))

        slice = {"instantiation": "plc-instantiated",
                 "description": "planetstack slice",
                 "slice_id": pl_slice_id(ps_slice),
                 "node_ids": node_ids,
                 "url": "planetstack",
                 "max_nodes": 1000,
                 "peer_slice_id": None,
                 "slice_tag_ids": [],
                 "peer_id": None,
                 "site_id": ps_id_to_pl_id(ps_slice.site_id),
                 "name": ps_slicename_to_pl_slicename(ps_slice.name)}

                 # creator_person_id, person_ids, expires, created

        slices.append(slice)
    return slices

def GetNodes(node_ids=None, fields=None):
    if node_ids:
        ps_nodes = Node.objects.filter(id__in=[pl_id_to_ps_id(nid) for nid in node_ids])
    else:
        ps_nodes = Node.objects.all()
    nodes = []
    for ps_node in ps_nodes:
        slice_ids=[]
        for ps_sliver in ps_node.slivers.all():
            slice_ids.append(pl_slice_id(ps_sliver.slice))

        node = {"node_id": ps_id_to_pl_id(ps_node.id),
                "site_id": ps_id_to_pl_id(ps_node.site_id),
                "node_type": "regular",
                "peer_node_id": None,
                "hostname": ps_node.name,
                "conf_file_ids": [],
                "slice_ids": slice_ids,
                "model": "planetstack",
                "peer_id": None,
                "node_tag_ids": []}

                # last_updated, key, boot_state, pcu_ids, node_type, session, last_boot,
                # interface_ids, slice_ids_whitelist, run_level, ssh_rsa_key, last_pcu_reboot,
                # nodegroup_ids, verified, last_contact, boot_nonce, version,
                # last_pcu_configuration, last_download, date_created, ports

        nodes.append(node)

    nodes = [filter_fields(node, fields) for node in nodes]

    return nodes

def GetTags(slicename,node_id):
    return {}

def GetSites():
    ps_sites = Site.objects.all()
    sites = []
    for ps_site in ps_sites:
        slice_ids=[]
        for ps_slice in ps_site.slices.all():
            slice_ids.append(pl_slice_id(ps_slice))

        node_ids=[]
        for ps_node in ps_site.nodes.all():
            node_ids.append(ps_id_to_pl_id(ps_node.id))


        site = {"site_id": ps_id_to_pl_id(ps_site.id),
                "node_ids": node_ids,
                "pcu_ids": [],
                "max_slices": 100,
                "max_slivers": 1000,
                "is_public": False,
                "peer_site_id": None,
                "abbrebiated_name": ps_site.abbreviated_name,
                "address_ids": [],
                "name": ps_site.name,
                "url": None,
                "site_tag_ids": [],
                "enabled": True,
                "longitude": float(ps_site.location.longitude),
                "latitude": float(ps_site.location.latitude),
                "slice_ids": slice_ids,
                "login_base": ps_site.login_base,
                "peer_id": None}

                # last_updated, ext_consortium_id, person_ids, date_created

        sites.append(site)

    return sites

def GetInterfaces(slicename, node_ids):
    interfaces = []
    ps_slices = Slice.objects.filter(name=slicename)
    for ps_slice in ps_slices:
        for ps_sliver in ps_slice.slivers.all():
            node_id = ps_id_to_pl_id(ps_sliver.node_id)
            if node_id in node_ids:
                ps_node = ps_sliver.node
                interface = {"node_id": node_id,
                             "ip": socket.gethostbyname(ps_node.name),
                             "broadcast": None,
                             "mac": "11:22:33:44:55:66",
                             "bwlimit": None,
                             "network": None,
                             "is_primary": True,
                             "dns1": None,
                             "hostname": None,
                             "netmask": None,
                             "interface_tag_ids": [],
                             "interface_id": node_id,     # assume each node has only one interface
                             "gateway": None,
                             "dns2": None,
                             "type": "ipv4",
                             "method": "dhcp"}
                interfaces.append(interface)
    return interfaces

def find_multi_slicename(orig_slicename):
    """
         Because we sometimes have issues deleting a slice in planetstack and
         creating a new one, allow us to use a prefix match, that way someone
         can put a version number of the end of the slicename
    """
    global slice_name_map
    slices = Slice.objects.filter()
    for slice in slices:
        if slice.name.startswith(orig_slicename):
            slice_name_map[slice.name] = orig_slicename
            return slice.name

    return orig_slicename


def GetConfiguration(name):
    slicename = name["name"]
    if "node_id" in name:
        node_id = name["node_id"]
    else:
        node_id = 0

    slicename = find_multi_slicename(slicename)

    node_sliver_tags = GetTags(slicename, node_id)

    slices = GetSlices({"name": slicename})
    perhost = {}
    allinterfaces = {}
    hostipmap = {}
    nodes = []
    if len(slices)==1:
        slice = slices[0]
        node_ids = slice['node_ids']
        nodes = GetNodes(node_ids, ['hostname', 'node_id', 'site_id'])
        nodemap = {}
        for node in nodes:
            nodemap[node['node_id']]=node['hostname']

        interfaces = GetInterfaces(slicename, node_ids)
        hostipmap = {}
        for interface in interfaces:
            if nodemap[interface['node_id']] not in allinterfaces:
                allinterfaces[nodemap[interface['node_id']]] = []
            interface['interface_tags'] = []
            allinterfaces[nodemap[interface['node_id']]].append(interface)
            if interface['is_primary']:
                hostipmap[nodemap[interface['node_id']]] = interface['ip']

        for nid in node_ids:
            sliver_tags = GetTags(slicename,nid)
            perhost[nodemap[nid]] = sliver_tags

    slivers = GetSlices()
    if node_id != 0:
        slivers = [slice for slice in slivers if (node_id in slice.node_ids)]

    sites = GetSites()
    for site in sites:
        site["site_tags"] = []

    timestamp = int(time.time())
    return {'version': 3,
            'timestamp': timestamp,
            'configuration': node_sliver_tags,
            'allconfigurations':perhost,
            'hostipmap':hostipmap,
            'slivers': slivers,
            'interfaces': allinterfaces,
            'sites': sites,
            'nodes': nodes}

def DoGetConfiguration():
    find_multi_slicename("princeton_vcoblitz")
    slices = GetSlices()
    nodes = GetNodes()
    configs={}
    for slicename in ["princeton_vcoblitz"]:
        configs[slicename] = GetConfiguration({"name": slicename})

    result = {"configs": configs,
              "slices": slices,
              "nodes": nodes}

    return result

@csrf_exempt
def LegacyXMLRPC(request):
    if request.method == "POST":
        try:
            (args, method) = xmlrpclib.loads(request.body)
            result = None
            if (method == "GetConfiguration"):
                result = DoGetConfiguration()
            return HttpResponse(xmlrpclib.dumps((result,), methodresponse=True, allow_none=1))
        except:
            traceback.print_exc()
            return HttpResponseServerError()
    else:
        return HttpResponse("Not Implemented")

if __name__ == '__main__':
    find_multi_slicename("princeton_vcoblitz")  # set up the mapping for princeton_vcoblitz2 -> princeton_vcoblitz

    slices = GetSlices()
    nodes = GetNodes()

    if ("-d" in sys.argv):
        config = GetConfiguration({"name": "princeton_vcoblitz"})
        print config
        print slices
        print nodes
    else:
        configs={}
        for slicename in ["princeton_vcoblitz"]:
            configs[slicename] = GetConfiguration({"name": slicename})

        file("planetstack_config","w").write(json.dumps(configs))
        file("planetstack_slices","w").write(json.dumps(slices))
        file("planetstack_nodes","w").write(json.dumps(nodes))