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def calculate_flowgraph_complexity(flowgraph):
""" Determines the complexity of a flowgraph """
dbal = 0
for block in flowgraph.blocks:
# Skip options block
if block.key == 'options':
continue
# Don't worry about optional sinks?
sink_list = [c for c in block.sinks if not c.get_optional()]
source_list = [c for c in block.sources if not c.get_optional()]
sinks = float(len(sink_list))
sources = float(len(source_list))
base = max(min(sinks, sources), 1)
# Port ratio multiplier
if min(sinks, sources) > 0:
multi = sinks / sources
multi = (1 / multi) if multi > 1 else multi
else:
multi = 1
# Connection ratio multiplier
sink_multi = max(float(sum(len(c.get_connections()) for c in sink_list) / max(sinks, 1.0)), 1.0)
source_multi = max(float(sum(len(c.get_connections()) for c in source_list) / max(sources, 1.0)), 1.0)
dbal += base * multi * sink_multi * source_multi
blocks = float(len(flowgraph.blocks))
connections = float(len(flowgraph.connections))
elements = blocks + connections
disabled_connections = sum(not c.enabled for c in flowgraph.connections)
variables = elements - blocks - connections
enabled = float(len(flowgraph.get_enabled_blocks()))
# Disabled multiplier
if enabled > 0:
disabled_multi = 1 / (max(1 - ((blocks - enabled) / max(blocks, 1)), 0.05))
else:
disabled_multi = 1
# Connection multiplier (How many connections )
if (connections - disabled_connections) > 0:
conn_multi = 1 / (max(1 - (disabled_connections / max(connections, 1)), 0.05))
else:
conn_multi = 1
final = round(max((dbal - 1) * disabled_multi * conn_multi * connections, 0.0) / 1000000, 6)
return final
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