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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import ipaddress

from calls import EjabberdApiCalls

# rfc6052: IPv6 Addressing of IPv4/IPv6 Translators
nat64 = ipaddress.ip_network("64:ff9b::/96")


class EjabberdMetrics(EjabberdApiCalls):
    """
    class to fetch metrics per xmlrpc
    """
    def __init__(self, url, login=None, api="rpc", muc_host: str = 'conference'):
        # init ejabberd api
        super().__init__(url, login, api)

        # variables
        self.muc_host = muc_host

    def _client(self, resource):
        clientmap = {
            "Conv6ations": ["Conversations with IPv6", "Conv6ations for Sum7"],
            "Conversations": [],
            "Pix-Art Messenger": [],
            "Gajim": ["gajim"],
            "Psi+": [],
            "jitsi": [],
            "Dino": ["dino"],
            "poezio": [],
            "profanity": [],
            "Xabber": ["xabber", "xabber-android"],
            "ChatSecure": ["chatsecure"],
            "Monal": []
        }

        for client, names in clientmap.items():
            for c in names:
                if c in resource:
                    return client
            if client in resource:
                return client
        return "other"

    @staticmethod
    def _ipversion(ip):
        addr = ipaddress.ip_address(ip)
        if addr.version == 6:
            if addr.ipv4_mapped:
                return 4
            if addr in nat64:
                return 4
        return addr.version

    def update(self):
        # nodes
        self._nodes = self.fetch_nodes()

        # vhosts
        self._vhosts = self.fetch_vhosts()

        # registered
        if not hasattr(self, "_registered"):
            self._registered = {}
        self._registered[None] = self.fetch_registered_count()

        # muc
        if not hasattr(self, "_muc"):
            self._muc = {}
        self._muc[None] = self.fetch_muc_count(muc_host=self.muc_host)

        # registered + muc
        for vhost in self._vhosts:
            self._registered[vhost] = self.fetch_registered_count(vhost)
            self._muc[vhost] = self.fetch_muc_count(vhost, muc_host=self.muc_host)

        # online user
        self._onlineuser = self.fetch_onlineuser()

        # s2s
        self._s2s_in = self.fetch_s2s_in()
        self._s2s_out = self.fetch_s2s_out()

        # misc
        self._uptime = self.fetch_uptime()
        self._processes = self.fetch_processes()

    def get_online_by(self, by="node", parse=None, vhost=None, node=None):
        parser = parse or (lambda a: a)
        if not hasattr(self, "_onlineuser"):
            self._onlineuser = self.fetch_onlineuser()
        data = {}

        for conn in self._onlineuser:
            if vhost is not None and vhost not in conn["jid"]:
                continue
            if node is not None and node != conn["node"]:
                continue
            if by not in conn:
                continue
            value = parser(conn[by])
            if value not in data:
                data[value] = 1
            else:
                data[value] += 1
        return data

    def get_online_by_node(self, vhost=None):
        return self.get_online_by("node", vhost=vhost)

    def get_online_by_vhost(self, node=None):
        return self.get_online_by("jid", parse=lambda jid: jid[jid.find("@")+1:jid.find("/")], node=node)

    def get_online_by_status(self, vhost=None, node=None):
        return self.get_online_by("status", vhost=vhost, node=node)

    def get_online_by_connection(self, vhost=None, node=None):
        return self.get_online_by("connection", vhost=vhost, node=node)

    def get_online_by_client(self, vhost=None, node=None):
        return self.get_online_by("resource", parse=self._client, vhost=vhost, node=node)

    def get_online_by_ipversion(self, vhost=None, node=None):
        return self.get_online_by("ip", parse=self._ipversion, vhost=vhost, node=node)

    def get_online_client_by(self, by="ip", parse=None, vhost=None, node=None):
        parser = parse or self._ipversion
        if not hasattr(self, "_onlineuser"):
            self._onlineuser = self.fetch_onlineuser()
        data = {}

        for conn in self._onlineuser:
            client = "other"
            if "resource" in conn:
                client = self._client(conn["resource"])
            if client not in data:
                data[client] = {}
            if vhost is not None and vhost not in conn["jid"]:
                continue
            if node is not None and node != conn["node"]:
                continue
            if by not in conn:
                continue
            value = parser(conn[by])
            if value not in data[client]:
                data[client][value] = 1
            else:
                data[client][value] += 1
        return data

    def get_online_client_by_ipversion(self, vhost=None, node=None):
        return self.get_online_client_by("ip", parse=self._ipversion, vhost=vhost, node=node)

    def get_registered(self, vhost=None):
        if not hasattr(self, "_registered"):
            self._registered = {}
        if vhost not in self._registered:
            self._registered[vhost] = self.fetch_registered_count(vhost)
        return self._registered[vhost]

    def get_muc(self, vhost=None):
        if not hasattr(self, "_muc"):
            self._muc = {}
        if vhost not in self._muc:
            self._muc[vhost] = self.fetch_muc_count(vhost, muc_host=self.muc_host)
        return self._muc[vhost]

    def get_vhosts(self):
        if not hasattr(self, "_vhosts"):
            self._vhosts = self.fetch_vhosts()
        return self._vhosts

    def get_s2s_in(self):
        if not hasattr(self, "_s2s_in"):
            self._s2s_in = self.fetch_s2s_in()
        return self._s2s_in

    def get_s2s_out(self):
        if not hasattr(self, "_s2s_out"):
            self._s2s_out = self.fetch_s2s_out()
        return self._s2s_out

    def get_uptime(self):
        if not hasattr(self, "_uptime"):
            self._uptime = self.fetch_uptime()
        return self._uptime

    def get_processes(self):
        if not hasattr(self, '_processes'):
            self._processes = self.fetch_processes()
        return self._processes

    def get_vhost_metrics(self, vhost): 
        data = {
            "registered": self.get_registered(vhost),
            "muc": self.get_muc(vhost),
            "online_by_status": self.get_online_by_status(vhost),
            "online_by_client": self.get_online_by_client(vhost),
            "online_by_ipversion": self.get_online_by_ipversion(vhost),
            "online_by_connection": self.get_online_by_connection(vhost),
            "online_by_node": self.get_online_by_node(vhost)
        }

        return data

    def get_nodes(self):
        if not hasattr(self, "_nodes"):
            self._nodes = self.fetch_nodes()
        return self._nodes

    def get_node_metrics(self, node): 
        data = {
            "online_by_status": self.get_online_by_status(node=node),
            "online_by_client": self.get_online_by_client(node=node),
            "online_by_ipversion": self.get_online_by_ipversion(node=node),
            "online_by_connection": self.get_online_by_connection(node=node),
            "online_by_vhost": self.get_online_by_vhost(node=node)
        }

        return data

    def get_all(self):
        data = {
            "registered": self.get_registered(),
            "muc": self.get_muc(),
            "s2s_in": self.get_s2s_in(),
            "s2s_out":  self.get_s2s_out(),
            "uptime": self.get_uptime(),
            "processes": self.get_processes(),
            "online_by_status": self.get_online_by_status(),
            "online_by_client": self.get_online_by_client(),
            "online_by_ipversion": self.get_online_by_ipversion(),
            "online_by_connection": self.get_online_by_connection(),
            "online_by_node": self.get_online_by_node(),
            "online_by_vhost": self.get_online_by_vhost()
        }

        vhosts = {}
        for host in self.get_vhosts():
            vhosts[host] = self.get_vhost_metrics(host)
        data["vhosts"] = vhosts
        
        nodes = {}
        for node in self.get_nodes():
            nodes[node] = self.get_node_metrics(node)

        data["online_client_by_ipversion"] = self.get_online_client_by_ipversion()
        data["nodes"] = nodes

        return data


if __name__ == "__main__":
    import json
    from config import Config

    # load config
    config = Config()

    # credentials and parameters
    url = config.get('url', default='http://localhost:5280/api')
    login = config.get('login', default=None)
    api = config.get('api', default='rest')

    # init handler
    metrics = EjabberdMetrics(url, login, api)

    data = metrics.get_all()
    print(json.dumps(data, indent=True))