"""make_blind — export the CERTIFIED BTC/ETH 1d feed as ANONYMIZED, OVERLAID curves.

The blind-signal fleet (~50 "signal expert" agents) must NOT know the series are
BTC/ETH crypto — otherwise they pattern-match the 2020 covid crash / 2022 bear /
2024 halving from memory instead of finding a real, transferable timing edge.

So we strip every tell:
  * relabel  BTC->"A", ETH->"B"  (no ticker anywhere)
  * REBASE each series to 100 at its first bar (multiply all OHLC by 100/open[0]) ->
    constant rescale, returns/backtest UNCHANGED, but the price LEVEL no longer says
    "this is $60k bitcoin". Both curves now start at 100 = literally "curve sovrapposte".
  * synthetic DAILY calendar starting 2001-01-01 (so 1 bar = 1 day for annualization,
    but no 2020/2022 era to recognize).
  * normalize volume to its own median (=1) -> shape kept, scale anonymized.

Split: first SPLIT_FRAC of bars = TRAIN (handed to the agents), the rest = TEST
(held out; only the orchestrator ever evaluates on it -> a true out-of-sample PnL/DD).

Outputs (data/blind/, gitignored-friendly):
  blind_A_train.parquet  blind_B_train.parquet   <- agent-visible
  blind_A_full.parquet   blind_B_full.parquet    <- orchestrator-only (full series, for
                                                     OOS eval with proper warmup)
  blind_meta.json        <- split index, lengths (NO mapping to BTC/ETH in plain sight)
  overlay.png            <- the two overlaid anonymized curves (for the human)
"""
from __future__ import annotations

import json
import sys
from pathlib import Path

import numpy as np
import pandas as pd

sys.path.insert(0, "/opt/docker/PythagorasGoal/scripts/research/alt")
import altlib as al  # noqa: E402

OUT = Path("/opt/docker/PythagorasGoal/data/blind")
SPLIT_FRAC = 0.70
SYNTH_START = "2001-01-01"
# mapping kept OUT of the agent-visible meta; only here in source for our own audit.
_REAL = {"A": "BTC", "B": "ETH"}


def _anonymize(df: pd.DataFrame, n_bars: int) -> pd.DataFrame:
    df = df.reset_index(drop=True).copy()
    base = float(df["open"].iloc[0])
    scale = 100.0 / base
    out = pd.DataFrame()
    synth = pd.date_range(SYNTH_START, periods=len(df), freq="1D", tz="UTC")
    out["timestamp"] = (synth.view("int64") // 1_000_000).astype("int64")
    for col in ("open", "high", "low", "close"):
        out[col] = df[col].values.astype(float) * scale
    vmed = float(np.nanmedian(df["volume"].values)) or 1.0
    out["volume"] = df["volume"].values.astype(float) / vmed
    out["datetime"] = synth
    return out


def main() -> None:
    OUT.mkdir(parents=True, exist_ok=True)
    meta = {"split_frac": SPLIT_FRAC, "series": {}}
    curves = {}
    for label, asset in _REAL.items():
        raw = al.get(asset, "1d")
        anon = _anonymize(raw, len(raw))
        n = len(anon)
        cut = int(n * SPLIT_FRAC)
        anon.to_parquet(OUT / f"blind_{label}_full.parquet", index=False)
        anon.iloc[:cut].reset_index(drop=True).to_parquet(
            OUT / f"blind_{label}_train.parquet", index=False)
        meta["series"][label] = {"n_bars": n, "train_bars": cut, "test_bars": n - cut}
        curves[label] = anon["close"].values
        print(f"  Series {label}: {n} bars  train={cut}  test={n-cut}  "
              f"(rebased start=100, level now {anon['close'].iloc[-1]:.0f})")

    (OUT / "blind_meta.json").write_text(json.dumps(meta, indent=2))

    # overlay chart for the human (agents work on the numbers, not the png)
    try:
        import matplotlib
        matplotlib.use("Agg")
        import matplotlib.pyplot as plt
        fig, ax = plt.subplots(figsize=(12, 5))
        for label, c in curves.items():
            ax.plot(np.arange(len(c)), c, label=f"Series {label}", lw=0.8)
        ax.axvline(int(min(len(c) for c in curves.values()) * SPLIT_FRAC),
                   ls="--", color="k", alpha=0.4, label="train/test cut")
        ax.set_yscale("log")
        ax.set_title("Anonymized overlaid curves (rebased to 100) — train | held-out test")
        ax.legend()
        fig.tight_layout()
        fig.savefig(OUT / "overlay.png", dpi=110)
        print(f"  overlay.png written")
    except Exception as e:
        print(f"  (chart skipped: {e})")

    print(f"\n  wrote -> {OUT}")


if __name__ == "__main__":
    main()