"""R605：合法参数批次与实际生效参数回执；只用合成价格。"""
from itertools import product
from hashlib import sha256
import json

PRICES = [10, 11, 9, 12, 13, 10, 14, 15, 11, 16]


def digest(value):
    return sha256(json.dumps(value, sort_keys=True).encode()).hexdigest()


def strategy(prices, *, fast, slow, threshold):
    effective = dict(fast=fast, slow=slow, threshold=threshold)
    signals = []
    for t in range(5, len(prices) - 1):
        quick = sum(prices[t-fast+1:t+1]) / fast
        long = sum(prices[t-slow+1:t+1]) / slow
        signals.append(int(quick > long * (1 + threshold)))
    return {"effective": effective, "signals": signals}


def run():
    proposed, excluded, completed = [], [], []
    for fast, slow, threshold in product([2, 3, 4], [3, 4, 5], [0, 0.01]):
        config = dict(fast=fast, slow=slow, threshold=threshold)
        proposed.append(config)
        if fast >= slow:
            excluded.append({"config": config, "reason": "fast>=slow"})
            continue
        result = strategy(PRICES, **config)
        assert result["effective"] == config
        completed.append({"id": digest(config)[:12], "config": config,
                          "data": digest(PRICES), "code": "R605.py:strategy",
                          "status": "completed", **result})
    assert len(proposed) == len(excluded) + len(completed)
    assert len({row["id"] for row in completed}) == len(completed)
    assert len(completed) == 12 and len(excluded) == 6
    try:
        strategy(PRICES, fast=2, slow=5, threshold=0, treshold=0.01)
    except TypeError:
        pass
    else:
        raise AssertionError("unknown field accepted")
    # 反例：包装器忽略传入值，实际重复运行同一个默认配置。
    broken = [strategy(PRICES, fast=2, slow=5, threshold=0) for _ in completed]
    mismatches = sum(row["config"] != got["effective"]
                     for row, got in zip(completed, broken))
    assert mismatches == 11
    print(f"proposed={len(proposed)} excluded={len(excluded)} completed={len(completed)}")
    for index in [0, -1]:
        row = completed[index]
        print("trace=" + json.dumps({"config": row["config"], "effective": row["effective"],
                                      "signals": row["signals"]}, sort_keys=True))
    print(f"ignored_config_mismatches={mismatches}")
    return completed


if __name__ == "__main__":
    run()