import ifcopenshell
import blenderbim.tool as tool
# create model variable
model = tool.Ifc.get()
# create a cost schedule and cost item
c_schedule = ifcopenshell.api.run("cost.add_cost_schedule",model,name = 'BoQ',predefined_type = 'PRICEDBILLOFQUANTITIES')
item = ifcopenshell.api.run("cost.add_cost_item", model, cost_schedule = c_schedule)
# add crew resource
crew = ifcopenshell.api.run("resource.add_resource", model, ifc_class = "IfcCrewResource",name = 'concrete_crew',predefined_type = 'SITE')
# add concrete resource and relate it to the cost item
concrete = ifcopenshell.api.run("resource.add_resource", model,ifc_class = "IfcConstructionMaterialResource", parent_resource = crew, name = 'concrete', predefined_type = 'CONCRETE')
ifcopenshell.api.run("control.assign_control", model,relating_control = item, related_object = concrete)
# assign value of 42 to concrete
value = ifcopenshell.api.run("cost.add_cost_value", model, parent = concrete)
ifcopenshell.api.run("cost.edit_cost_value", model, cost_value = value, attributes = {"AppliedValue": 42.0})
# assign quantity volume of 200 to concrete 
quantity1 = ifcopenshell.api.run("resource.add_resource_quantity", model, resource = concrete, ifc_class = "IfcQuantityVolume")
ifcopenshell.api.run("resource.edit_resource_quantity", model, physical_quantity = quantity1, attributes = {"Name":  'm3 of C25/30 ',"VolumeValue": 200.0})
# add equipment resource
equipment = ifcopenshell.api.run("resource.add_resource", model, ifc_class = "IfcConstructionEquipmentResource", parent_resource = crew, name = 'concrete_pump', predefined_type = 'PUMPING')
ifcopenshell.api.run("control.assign_control", model, relating_control = item, related_object = equipment)
# add fixed value to equipment resource
value = ifcopenshell.api.run("cost.add_cost_value", model, parent = equipment)
ifcopenshell.api.run("cost.edit_cost_value", model, cost_value = value, attributes = {"AppliedValue": 50000.0})
# assign quantity 1 to equipment 
quantity2 = ifcopenshell.api.run("resource.add_resource_quantity", model, resource = equipment, ifc_class = "IfcQuantityCount")
ifcopenshell.api.run("resource.edit_resource_quantity", model, physical_quantity = quantity2, attributes = {"Name": '1 day hire',"CountValue": 1.0})
# calculate the value of the cost_item item1
ifcopenshell.api.run("cost.calculate_cost_item_resource_value", model, cost_item = item)