from __future__ import annotations

from web_core.constants import TREND_BEAR, TREND_BULL


def build_live_decision_guide(
    trend_now: str,
    previous_trend: str,
    latest_classification: str,
) -> dict[str, str]:
    if trend_now == TREND_BULL:
        bias = "Long Bias"
        action = "Prefer pullback longs and avoid fresh shorts while the bullish trend remains active."
        invalidation = "Bullish bias is invalidated only after 2 consecutive real bearish bars confirm a reversal."
    elif trend_now == TREND_BEAR:
        bias = "Short Bias"
        action = "Prefer short setups on pops and avoid fresh longs while the bearish trend remains active."
        invalidation = "Bearish bias is invalidated only after 2 consecutive real bullish bars confirm a reversal."
    else:
        bias = "Stand Aside / Neutral"
        action = "Wait for 2 consecutive real bars in one direction before taking directional exposure."
        invalidation = "No active trend yet; avoid forcing trades in noisy ranges."

    if trend_now in {TREND_BULL, TREND_BEAR} and trend_now != previous_trend:
        confirmation = "Fresh Confirmation"
        confirmation_detail = "Latest closed bar confirmed a new active trend."
    else:
        confirmation = "No New Confirmation"
        confirmation_detail = "Latest closed bar did not confirm a new trend reversal."

    classification_hint = {
        "real_bull": "Latest bar closed above the previous range.",
        "real_bear": "Latest bar closed below the previous range.",
        "fake": "Latest bar stayed inside the previous range (noise).",
        "unclassified": "Latest bar is unclassified.",
    }.get(latest_classification, "Latest bar classification unavailable.")

    return {
        "bias": bias,
        "action": action,
        "invalidation": invalidation,
        "confirmation": confirmation,
        "confirmation_detail": confirmation_detail,
        "classification_hint": classification_hint,
    }