"""REPORT del portafoglio di strategie attivo (estensibile).

Costruisce il portafoglio dagli sleeve attivi (src/portfolio/sleeves.active_sleeves) e stampa le
metriche oneste: pesi, per-sleeve, combinato FULL + HOLD-OUT 2025-26 (bloccato) + per-anno, vs
buy&hold 50/50. Per ora c'e' solo TP01; aggiungere sleeve = una riga in sleeves.py.

    uv run python scripts/portfolio/run_portfolio.py
"""
from __future__ import annotations
import sys
from pathlib import Path
PROJECT_ROOT = Path(__file__).resolve().parents[2]
sys.path.insert(0, str(PROJECT_ROOT))
import numpy as np
import pandas as pd

from src.data.downloader import load_data
from src.strategies.trend_portfolio import resample_1d, simple_returns
from src.portfolio.portfolio import StrategyPortfolio, to_daily, metrics, HOLDOUT
from src.portfolio.sleeves import active_sleeves

CAPITAL = 2000.0


def buy_hold_daily() -> pd.Series:
    s = {}
    for a in ("BTC", "ETH"):
        df = resample_1d(load_data(a, "1h"))
        s[a] = pd.Series(simple_returns(df["close"].values.astype(float)), index=pd.to_datetime(df["datetime"]))
    J = pd.concat(s, axis=1, join="inner").fillna(0.0)
    return to_daily(pd.Series(0.5 * J["BTC"].values + 0.5 * J["ETH"].values, index=J.index))


def fmt(m, cap=CAPITAL):
    yrs = m["n"] / 365.25
    eur_day = (cap * m["ret"]) / (yrs * 365.25) if yrs > 0 else 0.0
    return (f"Sh {m['sharpe']:>5.2f} | ret {m['ret']*100:>+8.1f}% CAGR {m['cagr']*100:>+6.1f}% | "
            f"DD {m['maxdd']*100:>5.1f}% | ~€/g(2k) {eur_day:>+5.2f} | n {m['n']}")


def main():
    pf = StrategyPortfolio(active_sleeves(), capital=CAPITAL)
    bt = pf.backtest()
    print("=" * 96)
    print(f"  PORTAFOGLIO DI STRATEGIE — {len(pf.sleeves)} sleeve | capitale {CAPITAL:,.0f} | hold-out {HOLDOUT.date()}+ bloccato")
    print("=" * 96)

    print("\n  PESI:", "  ".join(f"{k} {v*100:.0f}%" for k, v in bt["weights"].items()))

    print("\n  PER-SLEEVE (standalone):")
    for name, d in bt["per_sleeve"].items():
        print(f"    {name:<16s} [{d['weight']*100:>3.0f}%]  FULL {fmt(d['full'])}")
        print(f"    {'':<16s}        HOLD {fmt(d['holdout'])}")

    print("\n  PORTAFOGLIO COMBINATO:")
    print(f"    FULL      {fmt(bt['full'])}")
    print(f"    HOLD-OUT  {fmt(bt['holdout'])}")

    bh = buy_hold_daily()
    print("\n  BENCHMARK buy&hold 50/50 (1d):")
    print(f"    FULL      {fmt(metrics(bh))}")
    print(f"    HOLD-OUT  {fmt(metrics(bh[bh.index >= HOLDOUT]))}")

    print("\n  PER ANNO (portafoglio combinato):")
    for y, d in bt["yearly"].items():
        print(f"    {y}: ret {d['ret']*100:>+7.1f}%  DD {d['dd']*100:>5.1f}%")

    print("\n  POSIZIONI CORRENTI (ultima barra chiusa):")
    for name, pos in pf.current_positions().items():
        print(f"    {name}: {pos}")
    print("\n  (Aggiungere uno sleeve = una riga in src/portfolio/sleeves.active_sleeves, dopo validazione.)")


if __name__ == "__main__":
    main()