# Copyright (c) 2025-2026 马建军. All rights reserved.
# 专有软件 — 未经授权禁止复制、传播、转售。
# 严禁用于：带单/代客理财、向他人推荐期货品种或买卖建议、融资配资等业务。
# 详见 LICENSE.zh-CN.txt 与 docs/软件购买与使用协议.md

"""斐波计算（自 crypto_monitor 复制，期货共用）。"""

def calc_fib_plan(direction, upper, lower, ratio):
    try:
        h = float(upper)
        l = float(lower)
        r = float(ratio)
    except (TypeError, ValueError):
        return None
    if h <= l or r <= 0 or r >= 1:
        return None
    span = h - l
    direction = (direction or "long").strip().lower()
    if direction == "short":
        entry = l + r * span
        return entry, h, l
    entry = h - r * span
    return entry, l, h