"""
Modelverse operations used by the UI
"""

import sys
sys.path.append("..")
import wrappers.modelverse as mv
import commons


def get_available_types():
    """ Returns a list of all types of nodes in all example models """
    types = []
    for m in commons.all_example_models():
        nodes = mv.all_instances(m, "Node")
        for node in nodes:
            typ = commons.get_node_type(m, node)
            types.append(typ)
    return list(set(types))

def is_edge_supported(from_type, to_type):
    """
    True if an association between from_type and to_type exists in any example model
    False otherwise
    """
    for m in commons.all_example_models():
        nodes_from = commons.all_nodes_with_type(m, from_type)
        nodes_to = commons.all_nodes_with_type(m, to_type)
        for nf in nodes_from:
            for nt in nodes_to:
                assocs = commons.get_associations_between(m, nf, nt)
                if assocs:
                    # somewhere in an example model, there is such an association
                    return True
    return False

def add_node(model, node_type):
    """ Adds new node to model "model" with type attribute "node_type" """
    node_id = mv.instantiate(model, "Node")
    mv.attr_assign(model, node_id, "typeID", node_type)
    print("Added node with id {} and type {} to model {}".format(node_id, node_type, model))
    return node_id

def add_edge(model, from_id, to_id, directed=False):
    """ Adds an edge to model "model" between the nodes "from_id" and "to_id" """
    edge_id = mv.instantiate(model, "Edge", (from_id, to_id))
    mv.attr_assign(model, edge_id, "directed", directed)
    print("Added edge between {} and {} to model".format(from_id, to_id))
    return edge_id