modelverse/integration/code/fsa_semantics.alc

include "primitives.alh"
include "modelling.alh"
include "object_operations.alh"
include "library.alh"
include "conformance_scd.alh"
include "io.alh"
include "metamodels.alh"
include "compilation_manager.alh"

Element function retype_to_runtime(design_model : Element):
	Element runtime_model
	Element all_states
	Element all_links
	String mm_type_name
	String element_name
	String attr_name
	String attr_value
	String attribute
	String src
	String dst
	String time
	Element all_attributes

	runtime_model = instantiate_model(import_node("models/FiniteStateAutomata_Runtime"))

	all_blocks = allInstances(design_model, "State")
	while (list_len(all_states) > 0):
		element_name = set_pop(all_states)
		mm_type_name = reverseKeyLookup(design_model["metamodel"]["model"], dict_read_node(design_model["type_mapping"], design_model["model"][element_name]))
		element_name = instantiate_node(runtime_model, mm_type_name, element_name)
		instantiate_attribute(runtime_model, element_name, "name", read_attribute(design_model, element_name, "name"))

	// Don't merge this together with the block conversion, as the destination block might not exist yet!
	all_links = allInstances(design_model, "Transition")
	while (read_nr_out(all_links) > 0):
		element_name = set_pop(all_links)
		src = reverseKeyLookup(design_model["model"], read_edge_src(design_model["model"][element_name]))
		dst = reverseKeyLookup(design_model["model"], read_edge_dst(design_model["model"][element_name]))
		instantiate_link(runtime_model, "Transition", element_name, src, dst)
		instantiate_attribute(runtime_model, element_name, "event", read_attribute(design_model, element_name, "event"))

		if (element_neq(read_attribute(design_model, element_name, "raise"), read_root())):
			// There is a raise attribute
			instantiate_attribute(runtime_model, element_name, "raise", read_attribute(design_model, element_name, "raise"))

	return runtime_model!

Element function sanitize(new_runtime_model : Element, old_runtime_model : Element):
	Element all_blocks
	Element all_links
	String element_name
	String attr_name
	String attr_value
	String attribute
	String time
	Element all_attributes
	Float current_time

	all_blocks = allInstances(new_runtime_model, "Block")
	while (list_len(all_blocks) > 0):
		element_name = set_pop(all_blocks)
		if (dict_in(old_runtime_model["model"], element_name)):
			if (is_nominal_instance(new_runtime_model, element_name, "ICBlock")):
				instantiate_attribute(new_runtime_model, element_name, "last_in", read_attribute(old_runtime_model, element_name, "last_in"))
			if (is_nominal_instance(new_runtime_model, element_name, "IntegratorBlock")):
				instantiate_attribute(new_runtime_model, element_name, "last_out", read_attribute(old_runtime_model, element_name, "last_out"))
			instantiate_attribute(new_runtime_model, element_name, "signal", read_attribute(old_runtime_model, element_name, "signal"))
		else:
			instantiate_attribute(new_runtime_model, element_name, "signal", 0.0)

	if (dict_in(old_runtime_model["model"], "time")):
		current_time = read_attribute(old_runtime_model, "time", "current_time")
	else:
		current_time = 0

	time = instantiate_node(new_runtime_model, "Time", "time")
	instantiate_attribute(new_runtime_model, time, "start_time", current_time)
	instantiate_attribute(new_runtime_model, time, "current_time", current_time)

	return new_runtime_model!

Void function dict_overwrite(d : Element, key : Element, value : Element):
	if (dict_in(d, key)):
		dict_delete(d, key)
	if (dict_in_node(d, key)):
		dict_delete_node(d, key)
	dict_add(d, key, value)

	return !

Integer function min(a : Integer, b : Integer):
	if (a < b):
		return a!
	else:
		return b!

Element function list_pop(list : Element):
	Integer top
	Element t
	top = list_len(list) - 1
	t = list_read(list, top)
	list_delete(list, top)
	return t!

String function readType(model : Element, name : String):
	return reverseKeyLookup(model["metamodel"]["model"], dict_read_node(model["type_mapping"], model["model"][name]))!

Integer function list_index_of(lst : Element, elem : Element):
	Integer i
	i = 0
	while (i < read_nr_out(lst)):
		if (value_eq(list_read(lst, i), elem)):
			return i!
		else:
			i = i + 1
	return -1!

Void function do_transition(model : Element, start_time : Float, event : String):
	// Read out current state
	String cstate_link
	String cstate
	cstate_link = set_pop(allInstances(model, "CurrentStateLink"))
	cstate = readAssociationDestination(model, cstate_link)

	// Read out all outgoing transitions
	Element all_transitions
	all_transitions = allOutgoingAssociationInstances(model, cstate, "Transition")

	while (read_nr_out(all_transitions) > 0):
		if (value_eq(read_attribute(model, cstate, "event"), event)):
			// Found a match
			model_delete_element(model, cstate_link)
			// TODO
			// Set destination of state
			// Raise "raise" attribute of transition
			return !

	return!

Void function execute_fsa(design_model : Element):
	String verify_result
	Element runtime_model
	Element old_runtime_model
	String cmd
	Boolean running
	String conforming
	Float simulation_time
	Float start_time

	start_time = time()
	simulation_time = 0.0
	old_runtime_model = instantiate_model(import_node("models/FiniteStateAutomata_Runtime"))
	runtime_model = retype_to_runtime(design_model)
	runtime_model = sanitize(runtime_model, old_runtime_model)

	conforming = conformance_scd(design_model)
	if (conforming == "OK"):
		output("CONFORMANCE_OK")
	else:
		output("CONFORMANCE_FAIL")

	while (True):
		cmd = input()

		// Process input
		if (cmd == "pause"):
			// Pausing merely stops a running simulation
			simulation_time = time() - start_time

			output("PAUSED")
			while (cmd != "simulate"):
				cmd = input()

			start_time = time() - simulation_time
			output("CONTINUE")
		
		elif (cmd == "event"):
			String evt
			evt = input()

			do_transition(runtime_model, start_time, evt)
			
		elif (cmd == "read_available_attributes"):
			// Returns a list of all available attributes
			Element attr_list
			Element attrs
			Element attr
			attr_list = getAttributeList(design_model, input())
			attrs = dict_keys(attr_list)
			while (0 < read_nr_out(attrs)):
				attr = set_pop(attrs)
				output("AVAILABLE_ATTR_VALUE " + cast_v2s(attr))
				output("AVAILABLE_ATTR_TYPE " + cast_v2s(dict_read(attr_list, attr)))
			output("AVAILABLE_ATTR_END")

		elif (cmd == "read_attribute"):
			// Returns the value of an attribute
			output("ATTR_VALUE " + cast_v2s(read_attribute(design_model, input(), input())))

		elif (bool_or(bool_or(cmd == "set_attribute", cmd == "instantiate_node"), bool_or(cmd == "delete_element", cmd == "instantiate_association"))):
			// Modify the structure
			if (cmd == "set_attribute"):
				// Setting an attribute
				String element_name
				String attribute_name
				element_name = input()
				attribute_name = input()

				// Delete it if it exists already
				if (bool_not(element_eq(read_attribute(design_model, element_name, attribute_name), read_root()))):
					unset_attribute(design_model, element_name, attribute_name)

				// And finally set it
				instantiate_attribute(design_model, element_name, attribute_name, input())

			elif (cmd == "instantiate_node"):
				// Instantiate a node
				instantiate_node(design_model, input(), input())

			elif (cmd == "instantiate_association"):
				// Instantiate an association
				instantiate_link(design_model, input(), input(), input(), input())

			elif (cmd == "delete_element"):
				// Delete the provided element
				model_delete_element(design_model, input())

			// After changes, we check whether or not the design model conforms
			if (conforming == "OK"):
				// Was correct, so store just to make sure
				simulation_time = time() - start_time
			conforming = conformance_scd(design_model)
			if (conforming == "OK"):
				// Conforming, so do the retyping and sanitization step
				runtime_model = retype_to_runtime(design_model)
				runtime_model = sanitize(runtime_model, old_runtime_model)
				schedule_init = create_schedule(runtime_model)
				schedule_run = read_root()
				old_runtime_model = runtime_model
				start_time = time() - simulation_time
				output("CONFORMANCE_OK")
			else:
				// Not conforming, so stop simulation and block for input (preferably a modify to make everything consistent again)
				output("CONFORMANCE_FAIL " + conforming)
		else:
			log("Did not understand command: " + cmd)

Float function v2f(i : Element):
	return cast_s2f(cast_v2s(i))!