#!/usr/bin/python
#
# Python bindings for Ingen
# Copyright (C) 2005 Leonard Ritter
# Copyright (C) 2006 Dave Robillard

# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

import os,sys,thread,time

from OSC import OSCMessage, decodeOSC

from twisted.internet.protocol import DatagramProtocol
from twisted.internet import reactor

INGEN_CALL_TIMEOUT = 5
INGEN_CALL_POLLTIME = 0.1

class TreeElement:
	def __init__(self,environment,parent,name):
		self.environment = environment
		self.parent = parent
		self.name = name
		self.metadata = {}
		
	def __del__(self):
		print "'%s': gone" % self.name
		
	def removeChild(self, child):
		pass

	def remove(self):
		self.parent.removeChild(self.name)
		self.parent = None
		del self
		
	def getParent(self):
		return self.parent
		
	def getName(self):
		return self.name

	def getPath(self):
		if self.parent:
			return self.parent.getPath() + "/" + self.name
		else:
			return self.name
			
	def getDepth(self):
		if self.parent:
			return self.parent.getDepth() + 1
		else:
			return 0
			
	def setMetaData(self,key,value):
		if (not self.metadata.has_key(value)) or (self.metadata[key] != value):
			print "||| '%s': '%s' = '%s'" % (self.getPath(), key, value)
			self.metadata[key] = value

class Port(TreeElement):
	def __init__(self,environment,parent,name):
		TreeElement.__init__(self,environment,parent,name)
		self.porttype = ""
		self.direction = ""
		self.hint = ""
		self.defaultvalue = 0.0
		self.minvalue = 0.0
		self.maxvalue = 0.0
		self.value = 0.0
		self.connections = {}
		print "*** '%s': new port" % self.getPath()
		
	def remove(self):
		for connection in self.getConnections():
			connection.remove()
		TreeElement.remove(self)
		
	def getConnections(self):
		return self.connections
		
	def addConnection(self,target,connection):
		self.connections[target] = connection
		
	def removeConnection(self,target):
		del self.connections[target]

	def setPortType(self,porttype):
		if self.porttype != porttype:
			print "*** '%s': changing porttype from '%s' to '%s'" % (self.getPath(), self.porttype, porttype)
			self.porttype = porttype
		
	def setDirection(self,direction):
		if self.direction != direction:
			print "*** '%s': changing direction from '%s' to '%s'" % (self.getPath(), self.direction, direction)
			self.direction = direction
		
	def setHint(self,hint):
		if self.hint != hint:
			print "*** '%s': changing hint from '%s' to '%s'" % (self.getPath(), self.hint, hint)
			self.hint = hint
		
	def setDefaultValue(self,defaultvalue):
		if self.defaultvalue != defaultvalue:
			print "*** '%s': changing defaultvalue from '%.3f' to '%.3f'" % (self.getPath(), self.defaultvalue, defaultvalue)
			self.defaultvalue = defaultvalue
		
	def setMinValue(self,minvalue):
		if self.minvalue != minvalue:
			print "*** '%s': changing minvalue from '%.3f' to '%.3f'" % (self.getPath(), self.minvalue, minvalue)
			self.minvalue = minvalue
		
	def setMaxValue(self,maxvalue):
		if self.maxvalue != maxvalue:
			print "*** '%s': changing maxvalue from '%.3f' to '%.3f'" % (self.getPath(), self.maxvalue, maxvalue)
			self.maxvalue = maxvalue
			
	def setValue(self,value):
		if self.value != value:
			print "*** '%s': changing value from '%.3f' to '%.3f'" % (self.getPath(), self.value, value)
			self.value = value

class Node(TreeElement):
	def __init__(self,environment,parent,name):
		TreeElement.__init__(self,environment,parent,name)
		self.ports = {}
		self.polyphonic = 0
		self.plugintype = ""
		self.libname = ""
		self.pluginlabel = ""
		print "+++ '%s': new node" % self.getPath()
		
	def remove(self):		
		for port in self.getPorts():
			port.remove()
		TreeElement.remove(self)		
		
	def removeChild(self, child):
		del self.ports[child]

	def getPorts(self):
		return self.ports.values()
		
	def setPluginLabel(self,pluginlabel):
		if pluginlabel != self.pluginlabel:
			print "+++ '%s': changing pluginlabel from '%s' to '%s'" % (self.getPath(), self.pluginlabel, pluginlabel)
			self.pluginlabel = pluginlabel			

	def setLibName(self,libname):
		if libname != self.libname:
			print "+++ '%s': changing libname from '%s' to '%s'" % (self.getPath(), self.libname, libname)
			self.libname = libname			
		
	def setPluginType(self,plugintype):
		if plugintype != self.plugintype:
			print "+++ '%s': changing plugintype from '%s' to '%s'" % (self.getPath(), self.plugintype, plugintype)
			self.plugintype = plugintype
		
	def setPolyphonic(self,polyphonic):
		if polyphonic != self.polyphonic:
			print "+++ '%s': changing polyphony from %i to %i" % (self.getPath(), self.polyphonic, polyphonic)
			self.polyphonic = polyphonic

	def hasPort(self,name):
		return self.ports.has_key(name)
		
	def getPort(self,name,mustexist=False):
		if not self.hasPort(name):
			if mustexist:
				return None
			self.ports[name] = self.environment.getPortClass()(self.environment,self,name)
		return self.ports[name]

class Patch(Node):
	def __init__(self,environment,parent,name):
		Node.__init__(self,environment,parent,name)
		self.nodes = {}
		self.patches = {}
		self.poly = 0
		self.enabled = False
		print "### '%s': new patch" % self.getPath()
		
	def remove(self):		
		for patch in self.getPatches():
			patch.remove()
		for node in self.getNodes():
			node.remove()
		Node.remove(self)		
		
	def removeChild(self, child):
		if self.hasNode(child):
			del self.nodes[child]
		elif self.hasPatch(child):
			del self.patches[child]
		else:
			Node.removeChild(self,child)
		
	def getPatches(self):
		return self.patches.values()
		
	def getNodes(self):
		return self.nodes.values()
		
	def getEnabled(self):
		return self.enabled
		
	def setEnabled(self,enabled):
		if enabled != self.enabled:
			print "### '%s': changing enabled from %s to %s" % (self.getPath(), str(self.enabled), str(enabled))
			enabled = self.enabled
		
	def getPoly(self):
		return self.poly
		
	def setPoly(self,poly):
		if poly != self.poly:
			print "### '%s': changing polyphony from %i to %i" % (self.getPath(), self.poly, poly)
			self.poly = poly
		
	def hasNode(self,name):
		return self.nodes.has_key(name)	

	def getNode(self,name,mustexist=False):
		if not self.hasNode(name):
			if mustexist:
				return None
			self.nodes[name] = self.environment.getNodeClass()(self.environment,self,name)
		return self.nodes[name]

	def hasPatch(self,name):
		return self.patches.has_key(name)
	
	def getPatch(self,name,mustexist=False):
		if not self.hasPatch(name):
			if mustexist:
				return None
			self.patches[name] = self.environment.getPatchClass()(self.environment,self,name)
		return self.patches[name]

class Connection:
	def __init__(self,environment,srcport,dstport):
		self.environment = environment
		self.srcport = srcport
		self.dstport = dstport
		self.srcport.addConnection(self.dstport,self)
		self.dstport.addConnection(self.srcport,self)
		print ">>> '%s'->'%s': new connection" % (self.srcport.getPath(),self.dstport.getPath())
		
	def __del__(self):
		print "connection gone"
		
	def remove(self):
		self.srcport.removeConnection(self.dstport)
		self.dstport.removeConnection(self.srcport)
		del self
		
	def getSrcPort(self):
		return self.srcport
		
	def getDstPort(self):
		return self.dstport
		
	def getPortPair(self):
		return self.srcport, self.dstport

class Environment:
	def __init__(self):
		self.omPatch = self.getPatchClass()(self,None,"")
		self.enabled = False
		self.connections = {}		
		
	def getConnectionClass(self):
		return Connection
		
	def getPatchClass(self):
		return Patch
		
	def getNodeClass(self):
		return Node
		
	def getPortClass(self):
		return Port
		
	def getConnection(self,srcportpath,dstportpath,mustexist=False):
		srcport = self.getPort(srcportpath,True)
		if not srcport:
			return None
		dstport = self.getPort(dstportpath,True)
		if not dstport:
			return None
		if not self.connections.has_key((srcport,dstport)):
			if mustexist:
				return None
			self.connections[(srcport,dstport)] = self.getConnectionClass()(self,srcport,dstport)
		return self.connections[(srcport,dstport)]
		
	def getConnections(self):
		return self.connections.values()
		
	def getPatch(self,path,mustexist=False):
		elements = path.split("/")
		currentPatch = None
		for element in elements:
			if element.empty():
				currentPatch = self.omPatch
			else:
				currentPatch = currentPatch.getPatch(element,mustexist)
				if not currentPatch:
					break
		return currentPatch

	def getNode(self,path,mustexist=False):
		elements = path.split("/")
		basepath = "/".join(elements[:-1])
		nodename = elements[-1]		
		patch = self.getPatch(basepath,True)
		if patch:
			return patch.getNode(nodename,mustexist)
		return None

	def getPort(self,path,mustexist=False):		
		elements = path.split("/")
		basepath = "/".join(elements[:-1])
		portname = elements[-1]
		node = self.getNode(basepath,True)
		if node:
			return node.getPort(portname,mustexist)
		patch = self.getPatch(basepath,True)
		if patch:
			return patch.getPort(portname,mustexist)
		return None
		
	def getObject(self,path):
		patch = self.getPatch(path,True)
		if patch:
			return patch
		node = self.getNode(path,True)
		if node:
			return node
		return self.getPort(path,True)		

	def printPatch(self,patch=None):
		if not patch:
			patch = self.omPatch
		print patch.getDepth()*'   ' + "### " + patch.getPath()		
		for node in patch.getNodes():
			print node.getDepth()*'   ' + "+++ " + node.getPath()
			for port in node.getPorts():
				print port.getDepth()*'   ' + "*** " + port.getPath()
		for port in patch.getPorts():
			print port.getDepth()*'   ' + "*** " + port.getPath()
		for subpatch in patch.getPatches():
			self.printPatch(subpatch)
			
	def printConnections(self):
		for connection in self.getConnections():
			print ">>> %s -> %s" % (connection.getSrcPort().getPath(), connection.getDstPort().getPath())

	#~ /ingen/engine_enabled - Notification engine's DSP has been enabled.
	def __ingen__engine_enabled(self):
		self.enabled = True
	
	#~ /ingen/engine_disabled - Notification engine's DSP has been disabled.
	def __ingen__engine_disabled(self):
		self.enabled = False
		
	#~ /ingen/new_node - Notification of a new node's creation.
	#~ * path (string) - Path of the new node
	#~ * polyphonic (integer-boolean) - Node is polyphonic (1 for yes, 0 for no)
	#~ * type (string) - Type of plugin (LADSPA, DSSI, Internal, Patch)
	#~ * lib-name (string) - Name of library if a plugin (ie cmt.so)
	#~ * plug-label (string) - Label of plugin in library (ie adsr_env)

	#~ * New nodes are sent as a blob. The first message in the blob will be this one (/ingen/new_node), followed by a series of /om/new_port commands, followed by /om/new_node_end.
	def __ingen__new_node(self,path,polyphonic,plugintype,libname,pluginlabel):
		node = self.getNode(path)
		node.setPolyphonic(polyphonic)
		node.setPluginType(plugintype)
		node.setLibName(libname)
		node.setPluginLabel(pluginlabel)
		
	def __ingen__new_node_end(self):
		pass
		
	#~ /ingen/node_removal - Notification of a node's destruction.
	#~ * path (string) - Path of node (which no longer exists)
	def __ingen__node_removal(self,path):
		node = self.getNode(path)
		node.remove()

	#~ /ingen/new_port - Notification of a node's destruction.

	#~ * path (string) - Path of new port
	#~ * type (string) - Type of port (CONTROL or AUDIO)
	#~ * direction (string) - Direction of data flow (INPUT or OUTPUT)
	#~ * hint (string) - Hint (INTEGER, LOGARITHMIC, TOGGLE, or NONE)
	#~ * default-value (float) - Default (initial) value
	#~ * min-value (float) - Suggested minimum value
	#~ * min-value (float) - Suggested maximum value

	#~ * Note that in the event of loading a patch, this message could be followed immediately by a control change, meaning the default-value is not actually the current value of the port (ahem, Lachlan).
	#~ * The minimum and maximum values are suggestions only, they are not enforced in any way, and going outside them is perfectly fine. Also note that the port ranges in ingenuity are not these ones! Those ranges are set as metadata.
	def __ingen__new_port(self,path,porttype,direction,hint,defaultvalue,minvalue,maxvalue):
		port = self.getPort(path)
		port.setPortType(porttype)
		port.setDirection(direction)
		port.setHint(hint)
		port.setDefaultValue(defaultvalue)
		port.setMinValue(minvalue)
		port.setMaxValue(maxvalue)

	#~ /ingen/port_removal - Notification of a port's destruction.
	#~ * path (string) - Path of port (which no longer exists)
	def __ingen__port_removal(self,path):
		port = self.getPort(path)
		port.remove()

	#~ /ingen/patch_destruction - Notification of a patch's destruction.
	#~ * path (string) - Path of patch (which no longer exists)
	def __ingen__patch_destruction(self,path):
		patch = self.getPatch(path)
		patch.remove()

	#~ /ingen/patch_enabled - Notification a patch's DSP processing has been enabled.
	#~ * path (string) - Path of enabled patch
	def __ingen__patch_enabled(self,path):
		patch = self.getPatch(path)
		patch.setEnabled(True)

	#~ /ingen/patch_disabled - Notification a patch's DSP processing has been disabled.
	#~ * path (string) - Path of disabled patch
	def __ingen__patch_disabled(self,path):
		patch = self.getPatch(path)
		patch.setEnabled(False)

	#~ /ingen/new_connection - Notification a new connection has been made.
	#~ * src-path (string) - Path of the source port
	#~ * dst-path (string) - Path of the destination port
	def __ingen__new_connection(self,srcpath,dstpath):
		self.getConnection(srcpath,dstpath)

	#~ /ingen/disconnection - Notification a connection has been unmade.
	#~ * src-path (string) - Path of the source port
	#~ * dst-path (string) - Path of the destination port
	def __ingen__disconnection(self,srcpath,dstpath):
		connection = self.getConnection(srcpath,dstpath)
		portpair = connection.getPortPair()
		connection.remove()
		del self.connections[portpair]

	#~ /ingen/metadata/update - Notification of a piece of metadata.
	#~ * path (string) - Path of the object associated with metadata (can be a node, patch, or port)
	#~ * key (string)
	#~ * value (string)
	def __ingen__metadata__update(self,path,key,value):
		object = self.getObject(path)
		object.setMetaData(key,value)

	#~ /ingen/control_change - Notification the value of a port has changed
	#~ * path (string) - Path of port
	#~ * value (float) - New value of port
	#~ * This will only send updates for values set by clients of course - not values changing because of connections to other ports!
	def __ingen__control_change(self,path,value):
		port = self.getPort(path)
		port.setValue(value)

	#~ /ingen/new_patch - Notification of a new patch
	#~ * path (string) - Path of new patch
	#~ * poly (int) - Polyphony of new patch (not a boolean like new_node)
	def __ingen__new_patch(self,path,poly):				
		patch = self.getPatch(path)
		patch.setPoly(poly)

class SocketError:
	pass

class Call:
	pass

class ClientProxy:
	def __init__(self, om, name, is_async = False):
		self.name = name
		self.om = om
		self.is_async = is_async
		
	def __call__(self, *args):
		if (self.is_async):
			self.om.sendMsg(self.name, *args)
			return True
		
		result = self.om.sendMsgBlocking(self.name, *args)
		if not result:
			return None
		if result[0] == "/ingen/response/ok":
			return True
		print "ERROR: %s" % result[1][1]
		return False
		
	def __getattr__(self, name):
		if (name[:2] == "__") and (name[-2:] == "__"): # special function
			raise AttributeError, name
		if name in self.__dict__:
			raise AttributeError, name
		if name == 'async':
			return ClientProxy(self.om, self.name, True)
		else:
			return ClientProxy(self.om, self.name + '/' + name)

class Client(DatagramProtocol, ClientProxy):
	def __init__(self):
		ClientProxy.__init__(self, self, "/ingen")
	
	def startProtocol(self):		
		self.transport.connect("127.0.0.1", 16180)
		host = self.transport.getHost()
		self.host = host.host
		self.port = host.port
		self.environment = None
		self.handlers = {}
		self.calls = {}
		#print "opened port at %s" % (str((self.host,self.port)))
		self.nextPacketNumber = 1
		
	def setEnvironment(self, environment):
		self.handlers = {}
		self.environment = environment
		for name in dir(self.environment):			
			element = getattr(self.environment,name)
			if (type(element).__name__ == 'instancemethod') and (element.__name__[:6] == "__ingen__"):
				handlername = element.__name__.replace("__","/")
				print "registering handler for '%s'" % handlername				
				self.handlers[handlername] = element
		
	def getEnvironment(self):
		return self.environment

	def connectionRefused(self):
		print "Noone listening, aborting."
		os._exit(-1)

	def messageReceived(self, (msg, args)):
		if msg == "/ingen/error":
			print "ERROR: %r" % args
			return
		if msg == "/ingen/response/ok":
			omcall = self.calls[args[0]]
			omcall.result = (msg,args)
			omcall.done = True
			return
 		if msg == "/ingen/response/error":
 			omcall = self.calls[args[0]]
 			omcall.result = (msg,args)
 			omcall.done = True
 			return
		if msg == "#bundle":
			for arg in args:
				self.messageReceived(arg)
			return
		if self.handlers.has_key(msg):
			try:
				self.handlers[msg](*args)
			except:
				a,b,c = sys.exc_info()
				sys.excepthook(a,b,c)
				print "with '%s'" % repr((msg,args))
			return
		print "no handler for '%s'" % repr((msg,args))

	def datagramReceived(self, data, (host, port)):
		self.messageReceived(decodeOSC(data))

	def getPacketNumber(self):
		packetNumber = self.nextPacketNumber
		self.nextPacketNumber = (self.nextPacketNumber + 1)
		return packetNumber
		
	def sendMsg(self,msg,*args):
		packetNumber = self.getPacketNumber()
		print "Sending %r (#%i)..." % (msg,packetNumber)
		omcall = Call()
		omcall.result = None
		omcall.done = False
		self.calls[packetNumber] = omcall
		message = OSCMessage()
		message.setAddress(msg)
		message.append(packetNumber)
		for arg in args:
			message.append(arg)
		self.transport.write(message.getBinary())
		time.sleep(0.01)
		return True

	def sendMsgBlocking(self,msg,*args):
		packetNumber = self.getPacketNumber()
		print "Sending %r (#%i)..." % (msg,packetNumber)
		omcall = Call()
		omcall.result = None
		omcall.done = False
		self.calls[packetNumber] = omcall
		message = OSCMessage()
		message.setAddress(msg)
		message.append(packetNumber)
		for arg in args:
			message.append(arg)
		self.transport.write(message.getBinary())
		now = time.time()
		while not omcall.done:
			time.sleep(INGEN_CALL_POLLTIME)			
			distance = time.time() - now
			if distance > INGEN_CALL_TIMEOUT:
				print "timeout"
				break			
		del self.calls[packetNumber]
		return omcall.result

 	def getAddressAsString(self):
 		return "osc.udp://%s:%d" % (self.host, self.port)
 
		

def startClient(func):
	om = Client()
	reactor.listenUDP(0, om)
	thread.start_new_thread(func,(om,))
	reactor.run()