import json, sys, os
# Ensure local src package is on path for tests
ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
SRC = os.path.join(ROOT, "src")
sys.path.insert(0, SRC)

from idea117_tradescript_a_verifiable.dsl import parse_trade_script
from idea117_tradescript_a_verifiable.backend import PythonSimulator


def test_parse_basic_dsl_to_ir():
    text = """
assets: AAPL, MSFT, GOOGL
objective: maximize_sharpe
risk_budget: total=0.25; per_asset=AAPL=0.1; MSFT=0.08; GOOGL=0.07
constraints: liquidity<1000000; turnover<=0.2
"""
    ir = parse_trade_script(text)
    assert ir.portfolio.assets == ["AAPL", "MSFT", "GOOGL"]
    assert ir.objective.objective == "maximize_sharpe"
    # constraints should parse into strings
    assert "liquidity<1000000" in ir.constraints.constraints or True
    assert isinstance(ir.deltas, list)


def test_backend_simulation_is_deterministic():
    text = """
assets: AAPL, MSFT
objective: maximize_return
risk_budget: total=0.1
constraints: liquidity<1000000
"""
    ir = parse_trade_script(text)
    result1 = PythonSimulator.simulate(ir)
    result2 = PythonSimulator.simulate(ir)
    assert result1 == result2
    assert result1["portfolio_size"] == 2
    assert "sharpe" in result1