import pickle
import logging
from systemd.journal import JournalHandler

from data import HostData

# Logging
log = logging.getLogger(__name__)
log.addHandler(JournalHandler())


# Isengard commands

def cmdping(owners, nick, text, store):
    """
    Ping command.
    """

    return "pong !"

def cmdhelp(owners, nick, text, store):
    """
    Ping command.
    """
    
    global commandtable
    
    msg = "je suis Isengard, le bot de supervision de ce salon.\n"
    msg += "\n"
    msg += "Voici la liste de mes commandes disponibles : \n"
    
    for cmd in commandtable:
        msg += "- " + cmd + "\n"
    
    return msg

def cmdmainteneur(owners, nick, text, store):
    """
    Change maintainer for an host
    """
    
    if not nick in owners:
        return "désolé mais vous n'êtes pas autorisé à utiliser cette commande."
        
    try:
        splittedtext = text.split(" ")
        
        # print maintainer
        if len(splittedtext) ==  2:
            host = splittedtext[1]
            
            return "le responsable de cette machine est " \
                    + store.knownHosts[host]["maintainer"]
        
        if len(splittedtext) ==  3:
            host = splittedtext[1]
            maintainer = splittedtext[2]
            
            if not host in store.knownHosts:
                store.knownHosts[host] = HostData(host)

            store.knownHosts[host].maintainer = maintainer
            return "le responsable est à présent " + maintainer
    
    except KeyError as e:
        log.error(repr(e))
        return "machine inconnue (tout le monde est son mainteneur)"
        
    except Exception as e:
        log.error(repr(e))
        return "erreur à l'exécution"

    return "Syntaxe invalide"

def cmdsave(owners, nick, text, store):
    """
    Save
    """
    
    if not nick in owners:
        return "désolé mais vous n'êtes pas autorisé à utiliser cette commande."
        
    try:
        with open('current_buffer', 'wb') as current_buffer_file:
            pickle.dump(store.knownHosts, current_buffer_file)
        return "OK"

    except Exception as e:
        log.error(repr(e))
        return "erreur à l'exécution"

def cmdload(owners, nick, text, store):
    """
    Save
    """
    
    if not nick in owners:
        return "désolé mais vous n'êtes pas autorisé à utiliser cette commande."
        
    try:
        with open('current_buffer', 'rb') as current_buffer_file:
            store.knownHosts = pickle.load(current_buffer_file)
        return "OK"

    except Exception as e:
        log.error(repr(e))
        return "erreur à l'exécution"

def cmdhist(owners, nick, text, store):
    """
    Check history for a maintainer
    """
    
    if not nick in store.knownMaintainers or len(store.knownMaintainers[nick]) == 0:
        return "pas d'historique disponible pour vous."

    msg = "voici les cinq derniers évènements pour chaque hôte notifié:\n"
    for host in store.knownMaintainers[nick]:
        msg += "\nHôte %s:" % host
        
        count = 0
        for serviceline in store.knownMaintainers[nick][host]:
            msg += "- %s" % serviceline + "\n"
            count += 1
            if count >= 5:
                break
        
    del store.knownMaintainers[nick]
    store.knownMaintainers[nick] = {}
    return msg

# Commands

commandtable = {
"help" : cmdhelp,
"hist" : cmdhist,
"load" : cmdload,
"mainteneur" : cmdmainteneur,
"ping" : cmdping,
"save" : cmdsave,
}