from __future__ import annotations

from typing import Dict

from .dsl import PlanDelta


class ExecutionEngine:
    """Minimal execution adapter: pretend to route orders across venues."""

    def __init__(self):
        pass

    def execute(self, plan: PlanDelta) -> Dict[str, float]:
        # Naive: compute an execution cost proxy from plan
        cost = max(0.0, plan.total_cost)
        # pretend PnL impact as a function of plan hedges and a deterministic factor
        pnl = -cost * 0.5
        return {"status": "ok", "cost": cost, "pnl": pnl}