import pytest

from idea76_gameeconomy_studio_verifiable.dsl import LocalEconomy, SharedSignal, PlanDelta
from idea76_gameeconomy_studio_verifiable.core import EconomyEngine


def test_inflation_cap_and_delta_application():
    le = LocalEconomy(
        name="ShardA",
        currencies=["GEM"],
        items=["Sword"],
        budgets={"inflation_cap": 0.05},
    )
    engine = EconomyEngine([le])
    delta = PlanDelta(round_id=1, changes={"currency:GEM": 100})
    signals = [SharedSignal("ShardA", "liquidity", 0.8, 1)]

    ir = engine.simulate_round(signals, delta)

    assert "ShardA" in ir
    shard = ir["ShardA"]
    assert shard["currencies"]["GEM"] >= 0
    # Ensure that the delta applied increased the GEM amount by approximately the delta (subject to cap)
    assert shard["currencies"]["GEM"] <= 1000 + 100  # cap logic in MVP is loose; keep bounds reasonable