A food program and a dataset receive nothing from a home

# Scenario 084: A food program and a dataset receive nothing from a home
# Two recipient roles have empty allow-lists: program (a food bank or a school) and dataset. Derive both over the example household and see twelve withheld facets and zero constraints, which is the intended result.
# Run a hub first: python hub/cookwala_hub.py --recipes examples
import json, os
from cookwala.client import CookwalaClient, CookwalaProblem

def load(path):
    with open(path, encoding="utf-8") as f:
        return json.load(f)

def pick(obj, path):
    for part in path.replace("]", "").replace("[", ".").split("."):
        obj = obj[int(part)] if part.isdigit() else (len(obj) if part == "length" else obj.get(part))
    return obj

c = CookwalaClient(os.environ.get("COOKWALA_HUB", "http://localhost:7878"))


# Step 1: A program plans menus from its own Distribution documents and the recipes' allergen lists; it receives nothing from households.
program = c.derive_constraints(pick(load("examples/household/context.json"), "facets"), "program")
assert pick(program, "constraints.length") == 0, pick(program, "constraints.length")
print("ok", "constraints.length", "=", 0)
assert pick(program, "disclosed.length") == 0, pick(program, "disclosed.length")
print("ok", "disclosed.length", "=", 0)
assert pick(program, "withheld.length") == 12, pick(program, "withheld.length")
print("ok", "withheld.length", "=", 12)

# Step 2: A dataset receives nothing either: there is no research export of household facets, derived or raw.
dataset = c.derive_constraints(pick(load("examples/household/context.json"), "facets"), "dataset")
assert pick(dataset, "constraints.length") == 0, pick(dataset, "constraints.length")
print("ok", "constraints.length", "=", 0)
assert pick(dataset, "disclosed.length") == 0, pick(dataset, "disclosed.length")
print("ok", "disclosed.length", "=", 0)
assert pick(dataset, "withheld.length") == 12, pick(dataset, "withheld.length")
print("ok", "withheld.length", "=", 12)

# Step 3: Every withheld entry carries the reason, so an auditor can tell an empty allow-list from a missing consent.
assert pick(program, "withheld[0].reason") == "not_allowed_for_role", pick(program, "withheld[0].reason")
print("ok", "withheld[0].reason", "=", "not_allowed_for_role")
assert pick(program, "withheld[10].facet") == "cw.facet.self.firmware", pick(program, "withheld[10].facet")
print("ok", "withheld[10].facet", "=", "cw.facet.self.firmware")
assert pick(program, "withheld[10].reason") == "no_consent", pick(program, "withheld[10].reason")
print("ok", "withheld[10].reason", "=", "no_consent")
assert pick(dataset, "withheld[0].reason") == "not_allowed_for_role", pick(dataset, "withheld[0].reason")
print("ok", "withheld[0].reason", "=", "not_allowed_for_role")

print("scenario complete")