#!/usr/bin/env python

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.
#

import os
import getopt
import sys
import socket
from cmd         import Cmd
from shlex       import split
from threading   import Lock
from time        import strftime, gmtime
from qpid.disp   import Display
from qpid.peer   import Closed
from qmf.console import Session, Console, SchemaClass, ObjectId

class Mcli(Cmd):
  """ Management Command Interpreter """

  def __init__(self, dataObject, dispObject):
    Cmd.__init__(self)
    self.dataObject = dataObject
    self.dispObject = dispObject
    self.dataObject.setCli(self)
    self.prompt = "qpid: "
    
  def emptyline(self):
    pass

  def setPromptMessage(self, p):
    if p == None:
      self.prompt = "qpid: "
    else:
      self.prompt = "qpid[%s]: " % p

  def do_help(self, data):
    print "Management Tool for QPID"
    print
    print "Commands:"
    print "    agents                          - Print a list of the known Agents"
    print "    list                            - Print summary of existing objects by class"
    print "    list <className>                - Print list of objects of the specified class"
    print "    list <className> active         - Print list of non-deleted objects of the specified class"
#   print "    show <className>                - Print contents of all objects of specified class"
#   print "    show <className> active         - Print contents of all non-deleted objects of specified class"
    print "    show <ID>                       - Print contents of an object (infer className)"
#   print "    show <className> <list-of-IDs>  - Print contents of one or more objects"
#   print "        list is space-separated, ranges may be specified (i.e. 1004-1010)"
    print "    call <ID> <methodName> [<args>] - Invoke a method on an object"
    print "    schema                          - Print summary of object classes seen on the target"
    print "    schema <className>              - Print details of an object class"
    print "    set time-format short           - Select short timestamp format (default)"
    print "    set time-format long            - Select long timestamp format"
    print "    quit or ^D                      - Exit the program"
    print

  def complete_set(self, text, line, begidx, endidx):
    """ Command completion for the 'set' command """
    tokens = split(line)
    if len(tokens) < 2:
      return ["time-format "]
    elif tokens[1] == "time-format":
      if len(tokens) == 2:
        return ["long", "short"]
      elif len(tokens) == 3:
        if "long".find(text) == 0:
          return ["long"]
        elif "short".find(text) == 0:
          return ["short"]
    elif "time-format".find(text) == 0:
      return ["time-format "]
    return []

  def do_set(self, data):
    tokens = split(data)
    try:
      if tokens[0] == "time-format":
        self.dispObject.do_setTimeFormat(tokens[1])
    except:
      pass

  def complete_schema(self, text, line, begidx, endidx):
    tokens = split(line)
    if len(tokens) > 2:
      return []
    return self.dataObject.classCompletions(text)

  def do_schema(self, data):
    try:
      self.dataObject.do_schema(data)
    except Exception, e:
      print "Exception in do_schema: %r" % e

  def do_agents(self, data):
    try:
      self.dataObject.do_agents(data)
    except Exception, e:
      print "Exception in do_agents: %r" % e

  def do_id(self, data):
    try:
      self.dataObject.do_id(data)
    except Exception, e:
      print "Exception in do_id: %r" % e

  def complete_list(self, text, line, begidx, endidx):
    tokens = split(line)
    if len(tokens) > 2:
      return []
    return self.dataObject.classCompletions(text)

  def do_list(self, data):
    try:
      self.dataObject.do_list(data)
    except Exception, e:
      print "Exception in do_list: %r" % e

  def do_show(self, data):
    try:
      self.dataObject.do_show(data)
    except Exception, e:
      print "Exception in do_show: %r" % e

  def do_call(self, data):
    try:
      self.dataObject.do_call(data)
    except Exception, e:
      print "Exception in do_call: %r", e

  def do_EOF(self, data):
    print "quit"
    try:
      self.dataObject.do_exit()
    except:
      pass
    return True

  def do_quit(self, data):
    try:
      self.dataObject.do_exit()
    except:
      pass
    return True

  def postcmd(self, stop, line):
    return stop

  def postloop(self):
    print "Exiting..."
    self.dataObject.close()

#======================================================================================================
# QmfData
#======================================================================================================
class QmfData(Console):
  """
  """
  def __init__(self, disp, url):
    self.disp = disp
    self.url = url
    self.session = Session(self, manageConnections=True)
    self.broker = self.session.addBroker(self.url)
    self.lock = Lock()
    self.connected = None
    self.closing = None
    self.first_connect = True
    self.cli = None
    self.idRegistry = IdRegistry()
    self.objects = {}

  #=======================
  # Methods to support CLI
  #=======================
  def setCli(self, cli):
    self.cli = cli

  def close(self):
    try:
      self.closing = True
      if self.session and self.broker:
        self.session.delBroker(self.broker)
    except:
      pass   # we're shutting down - ignore any errors

  def classCompletions(self, text):
    pass

  def do_schema(self, data):
    if data == "":
      self.schemaSummary()
    else:
      self.schemaTable(data)

  def do_agents(self, data):
    agents = self.session.getAgents()
    rows = []
    for agent in agents:
      version = 1
      if agent.isV2:
        version = 2
      rows.append(("%d.%s" % (agent.getBrokerBank(), agent.getAgentBank()), agent.label, agent.epoch, version)) 
    self.disp.table("QMF Agents:", ("Agent Name", "Label", "Epoch", "QMF Version"), rows)

  def do_id(self, data):
    tokens = data.split()
    for token in tokens:
      if not token.isdigit():
        print "Value %s is non-numeric" % token
        return
    title = "Translation of Display IDs:"
    heads = ('DisplayID', 'Epoch', 'Agent', 'ObjectName')
    if len(tokens) == 0:
      tokens = self.idRegistry.getDisplayIds()
    rows = []
    for token in tokens:
      rows.append(self.idRegistry.getIdInfo(int(token)))
    self.disp.table(title, heads, rows)

  def do_list(self, data):
    tokens = data.split()
    if len(tokens) == 0:
      self.listClasses()
    else:
      self.listObjects(tokens)

  def do_show(self, data):
    tokens = data.split()
    if len(tokens) == 0:
      print "Missing Class or ID"
      return
    keys = self.classKeysByToken(tokens[0])
    if keys:
      self.showObjectsByKey(keys)
    elif tokens[0].isdigit():
      self.showObjectById(int(tokens[0]))

  def do_call(self, data):
    tokens = data.split()
    if len(tokens) < 2:
      print "Not enough arguments supplied"
      return
    displayId = long(tokens[0])
    methodName = tokens[1]
    args = tokens[2:]

    obj = None
    try:
      self.lock.acquire()
      if displayId not in self.objects:
        print "Unknown ID"
        return
      obj = self.objects[displayId]
    finally:
      self.lock.release()

    object_id = obj.getObjectId();
    if not object_id.isV2 and obj.getAgent().isV2:
        object_key = ",".join([str(v) for p, v in obj.getProperties() if p.name != "vhostRef" and p.index == 1])
        class_key = obj.getClassKey();
        object_name = class_key.getPackageName() + ":" + class_key.getClassName() + ":" + object_key
        object_id = ObjectId.create(object_id.agentName, object_name)

    self.session._sendMethodRequest(self.broker, obj.getClassKey(), object_id, methodName, args)


  def do_exit(self):
    pass

  #====================
  # Sub-Command Methods
  #====================
  def schemaSummary(self, package_filter=None):
    rows = []
    packages = self.session.getPackages()
    for package in packages:
      if package_filter and package_filter != package:
        continue
      keys = self.session.getClasses(package)
      for key in keys:
        kind = "object"
        schema = self.session.getSchema(key)
        if schema.kind == SchemaClass.CLASS_KIND_EVENT:
          kind = "event"
        if schema.kind == SchemaClass.CLASS_KIND_TABLE:
          #
          # Don't display event schemata.  This will be a future feature.
          #
          rows.append((package, key.getClassName(), kind))
    self.disp.table("QMF Classes:", ("Package", "Name", "Kind"), rows)

  def schemaTable(self, text):
    packages = self.session.getPackages()
    if text in packages:
      self.schemaSummary(package_filter=text)
    for package in packages:
      keys = self.session.getClasses(package)
      for key in keys:
        if text == key.getClassName() or text == package + ":" + key.getClassName():
          schema = self.session.getSchema(key)
          if schema.kind == SchemaClass.CLASS_KIND_TABLE:
            self.schemaObject(schema)
          else:
            self.schemaEvent(schema)

  def schemaObject(self, schema):
    rows = []
    title = "Object Class: %s" % schema.__repr__()
    heads = ("Element", "Type", "Access", "Unit", "Notes", "Description")
    for prop in schema.getProperties():
      notes = ""
      if prop.index    : notes += "index "
      if prop.optional : notes += "optional "
      row = (prop.name, self.typeName(prop.type), self.accessName(prop.access),
             self.notNone(prop.unit), notes, self.notNone(prop.desc))
      rows.append(row)
    for stat in schema.getStatistics():
      row = (stat.name, self.typeName(stat.type), "", self.notNone(prop.unit), "", self.notNone(prop.desc))
      rows.append(row)
    self.disp.table(title, heads, rows)

    for method in schema.methods:
      rows = []
      heads = ("Argument", "Type", "Direction", "Unit", "Description")
      title = "  Method: %s" % method.name
      for arg in method.arguments:
        row = (arg.name, self.typeName(arg.type), arg.dir, self.notNone(arg.unit), self.notNone(arg.desc))
        rows.append(row)
      print
      self.disp.table(title, heads, rows)

  def schemaEvent(self, schema):
    rows = []
    title = "Event Class: %s" % schema.__repr__()
    heads = ("Element", "Type", "Unit", "Description")
    for arg in schema.arguments:
      row = (arg.name, self.typeName(arg.type), self.notNone(arg.unit), self.notNone(arg.desc))
      rows.append(row)
    self.disp.table(title, heads, rows)

  def listClasses(self):
    title = "Summary of Objects by Type:"
    heads = ("Package", "Class", "Active", "Deleted")
    rows = []
    totals = {}
    try:
      self.lock.acquire()
      for dispId in self.objects:
        obj = self.objects[dispId]
        key = obj.getClassKey()
        index = (key.getPackageName(), key.getClassName())
        if index in totals:
          stats = totals[index]
        else:
          stats = (0, 0)
        if obj.isDeleted():
          stats = (stats[0], stats[1] + 1)
        else:
          stats = (stats[0] + 1, stats[1])
        totals[index] = stats
    finally:
      self.lock.release()

    for index in totals:
      stats = totals[index]
      rows.append((index[0], index[1], stats[0], stats[1]))
    self.disp.table(title, heads, rows)

  def listObjects(self, tokens):
    ckeys = self.classKeysByToken(tokens[0])
    show_deleted = True
    if len(tokens) > 1 and tokens[1] == 'active':
      show_deleted = None
    heads = ("ID", "Created", "Destroyed", "Index")
    rows = []
    try:
      self.lock.acquire()
      for dispId in self.objects:
        obj = self.objects[dispId]
        if obj.getClassKey() in ckeys:
          utime, ctime, dtime = obj.getTimestamps()
          dtimestr = self.disp.timestamp(dtime)
          if dtime == 0:
            dtimestr = "-"
          if dtime == 0 or (dtime > 0 and show_deleted):
            row = (dispId, self.disp.timestamp(ctime), dtimestr, self.objectIndex(obj))
            rows.append(row)
    finally:
      self.lock.release()
    self.disp.table("Object Summary:", heads, rows)

  def showObjectsByKey(self, key):
    pass

  def showObjectById(self, dispId):
    heads = ("Attribute", str(dispId))
    rows = []
    try:
      self.lock.acquire()
      if dispId in self.objects:
        obj = self.objects[dispId]
        caption = "Object of type: %r" % obj.getClassKey()
        for prop in obj.getProperties():
          row = (prop[0].name, self.valueByType(prop[0].type, prop[1]))
          rows.append(row)
        for stat in obj.getStatistics():
          row = (stat[0].name, self.valueByType(stat[0].type, stat[1]))
          rows.append(row)
      else:
        print "No object found with ID %d" % dispId
    finally:
      self.lock.release()
    self.disp.table(caption, heads, rows)

  def classKeysByToken(self, token):
    """
    Given a token, return a list of matching class keys (if found):
    token formats:  <class-name>
                    <package-name>:<class-name>
    """
    pname = None
    cname = None
    parts = token.split(':')
    if len(parts) == 1:
      cname = parts[0]
    elif len(parts) == 2:
      pname = parts[0]
      cname = parts[1]
    else:
      raise ValueError("Invalid Class Name: %s" % token)

    keys = []
    packages = self.session.getPackages()
    for p in packages:
      if pname == None or pname == p:
        classes = self.session.getClasses(p)
        for key in classes:
          if key.getClassName() == cname:
            keys.append(key)
    return keys

  def typeName (self, typecode):
    """ Convert type-codes to printable strings """
    if   typecode == 1:  return "uint8"
    elif typecode == 2:  return "uint16"
    elif typecode == 3:  return "uint32"
    elif typecode == 4:  return "uint64"
    elif typecode == 5:  return "bool"
    elif typecode == 6:  return "short-string"
    elif typecode == 7:  return "long-string"
    elif typecode == 8:  return "abs-time"
    elif typecode == 9:  return "delta-time"
    elif typecode == 10: return "reference"
    elif typecode == 11: return "boolean"
    elif typecode == 12: return "float"
    elif typecode == 13: return "double"
    elif typecode == 14: return "uuid"
    elif typecode == 15: return "field-table"
    elif typecode == 16: return "int8"
    elif typecode == 17: return "int16"
    elif typecode == 18: return "int32"
    elif typecode == 19: return "int64"
    elif typecode == 20: return "object"
    elif typecode == 21: return "list"
    elif typecode == 22: return "array"      
    else:
      raise ValueError ("Invalid type code: %s" % str(typecode))

  def valueByType(self, typecode, val):
    if   typecode == 1:  return "%d" % val
    elif typecode == 2:  return "%d" % val
    elif typecode == 3:  return "%d" % val
    elif typecode == 4:  return "%d" % val
    elif typecode == 6:  return val
    elif typecode == 7:  return val
    elif typecode == 8:  return strftime("%c", gmtime(val / 1000000000))
    elif typecode == 9:
      if val < 0: val = 0
      sec = val / 1000000000
      min = sec / 60
      hour = min / 60
      day = hour / 24
      result = ""
      if day > 0:
        result = "%dd " % day
      if hour > 0 or result != "":
        result += "%dh " % (hour % 24)
      if min > 0 or result != "":
        result += "%dm " % (min % 60)
      result += "%ds" % (sec % 60)
      return result

    elif typecode == 10: return str(self.idRegistry.displayId(val))
    elif typecode == 11:
      if val:
        return "True"
      else:
        return "False"

    elif typecode == 12: return "%f" % val
    elif typecode == 13: return "%f" % val
    elif typecode == 14: return "%r" % val
    elif typecode == 15: return "%r" % val
    elif typecode == 16: return "%d" % val
    elif typecode == 17: return "%d" % val
    elif typecode == 18: return "%d" % val
    elif typecode == 19: return "%d" % val
    elif typecode == 20: return "%r" % val
    elif typecode == 21: return "%r" % val
    elif typecode == 22: return "%r" % val
    else:
      raise ValueError ("Invalid type code: %s" % str(typecode))

  def accessName (self, code):
    """ Convert element access codes to printable strings """
    if   code == '1': return "ReadCreate"
    elif code == '2': return "ReadWrite"
    elif code == '3': return "ReadOnly"
    else:
      raise ValueError ("Invalid access code: %s" % str(code))

  def notNone (self, text):
    if text == None:
      return ""
    else:
      return text

  def objectIndex(self, obj):
    if obj._objectId.isV2:
      return obj._objectId.getObject()
    result = ""
    first = True
    props = obj.getProperties()
    for prop in props:
      if prop[0].index:
        if not first:
          result += "."
        result += self.valueByType(prop[0].type, prop[1])
        first = None
    return result


  #=====================
  # Methods from Console
  #=====================
  def brokerConnected(self, broker):
    """ Invoked when a connection is established to a broker """
    try:
      self.lock.acquire()
      self.connected = True
    finally:
      self.lock.release()
    if not self.first_connect:
      print "Broker connected:", broker
    self.first_connect = None

  def brokerDisconnected(self, broker):
    """ Invoked when the connection to a broker is lost """
    try:
      self.lock.acquire()
      self.connected = None
    finally:
      self.lock.release()
    if not self.closing:
      print "Broker disconnected:", broker

  def objectProps(self, broker, record):
    """ Invoked when an object is updated. """
    oid = record.getObjectId()
    dispId = self.idRegistry.displayId(oid)
    try:
      self.lock.acquire()
      if dispId in self.objects:
        self.objects[dispId].mergeUpdate(record)
      else:
        self.objects[dispId] = record
    finally:
      self.lock.release()

  def objectStats(self, broker, record):
    """ Invoked when an object is updated. """
    oid = record.getObjectId()
    dispId = self.idRegistry.displayId(oid)
    try:
      self.lock.acquire()
      if dispId in self.objects:
        self.objects[dispId].mergeUpdate(record)
    finally:
      self.lock.release()

  def event(self, broker, event):
    """ Invoked when an event is raised. """
    pass

  def methodResponse(self, broker, seq, response):
    print response


#======================================================================================================
# IdRegistry
#======================================================================================================
class IdRegistry(object):
  """
  """
  def __init__(self):
    self.next_display_id = 101
    self.oid_to_display = {}
    self.display_to_oid = {}
    self.lock = Lock()

  def displayId(self, oid):
    try:
      self.lock.acquire()
      if oid in self.oid_to_display:
        return self.oid_to_display[oid]
      newId = self.next_display_id
      self.next_display_id += 1
      self.oid_to_display[oid] = newId
      self.display_to_oid[newId] = oid
      return newId
    finally:
      self.lock.release()

  def objectId(self, displayId):
    try:
      self.lock.acquire()
      if displayId in self.display_to_oid:
        return self.display_to_oid[displayId]
      return None
    finally:
      self.lock.release()

  def getDisplayIds(self):
    result = []
    for displayId in self.display_to_oid:
      result.append(str(displayId))
    return result

  def getIdInfo(self, displayId):
    """
    Given a display ID, return a tuple of (displayID, bootSequence/Durable, AgentBank/Name, ObjectName)
    """
    oid = self.objectId(displayId)
    if oid == None:
      return (displayId, "?", "unknown", "unknown")
    bootSeq = oid.getSequence()
    if bootSeq == 0:
      bootSeq = '<durable>'
    agent = oid.getAgentBank()
    if agent == '0':
      agent = 'Broker'
    return (displayId, bootSeq, agent, oid.getObject())


def Usage():
  print "Usage:  qpid-tool [[<username>/<password>@]<target-host>[:<tcp-port>]]"
  print

#=========================================================
# Main Program
#=========================================================

# Get host name and port if specified on the command line
cargs = sys.argv[1:]
_host = "localhost"

if len(cargs) > 0:
  _host = cargs[0]

if _host[0] == '-':
  Usage()
  if _host != '-h' and _host != "--help":
    print "qpid-tool: error: no such option:", _host
  sys.exit(1)

disp = Display()

# Attempt to make a connection to the target broker
try:
  data = QmfData(disp, _host)
except Exception, e:
  if str(e).find("Exchange not found") != -1:
    print "Management not enabled on broker:  Use '-m yes' option on broker startup."
  else:
    print "Failed: %s - %s" % (e.__class__.__name__, e)
  sys.exit(1)

# Instantiate the CLI interpreter and launch it.
cli = Mcli(data, disp)
print("Management Tool for QPID")
try:
  cli.cmdloop()
except KeyboardInterrupt:
  print
  print "Exiting..."
except Exception, e:
  print "Failed: %s - %s" % (e.__class__.__name__, e)

# alway attempt to cleanup broker resources
data.close()