from __future__ import annotations

import sys
import time
from datetime import date, datetime, time as dt_time
from pathlib import Path
from zoneinfo import ZoneInfo

sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
from nifty_backend.runtime import (
    CLOSE_REFRESH_READY,
    STALE_CHECK_INTERVAL_SECONDS,
    is_trading_day,
    latest_saved_prediction,
    close_refresh_due,
    refresh_market_close_data,
    refresh_daily_data,
    refresh_first5_prediction,
    refresh_stale_data_once,
    seconds_until_next_ist_run,
)


IST = ZoneInfo("Asia/Kolkata")
FIRST5_READY = dt_time(9, 20)


def latest_prediction_date() -> date | None:
    try:
        raw = latest_saved_prediction().get("input_date")
        return date.fromisoformat(str(raw)) if raw else None
    except Exception:
        return None


def refresh_if_current_session_is_ready() -> None:
    now = datetime.now(IST)
    if not is_trading_day(now.date()) or now.time() < FIRST5_READY:
        return
    if latest_prediction_date() == now.date():
        return
    prediction = refresh_first5_prediction()
    print(f"[scheduler] first5 prediction refreshed: {prediction.to_dict()}")
    info = refresh_daily_data()
    print(f"[scheduler] daily data refreshed: {info}")


def refresh_close_data_if_due() -> None:
    if not close_refresh_due():
        return
    info = refresh_market_close_data()
    print(f"[scheduler] close data refreshed: {info}")


def refresh_stale_data_if_due() -> None:
    info = refresh_stale_data_once()
    if info.get("status") == "refreshed":
        print(f"[scheduler] stale data refreshed: {info}")


def main() -> None:
    print("[scheduler] NIFTY first-five-minute scheduler started.")
    print("[scheduler] Runs the opening prediction after 09:20 IST so the 09:15-09:19 candles are complete.")
    while True:
        try:
            refresh_if_current_session_is_ready()
            refresh_close_data_if_due()
            refresh_stale_data_if_due()
        except Exception as exc:
            print(f"[scheduler] current-session refresh failed: {exc}")
        next_first5 = seconds_until_next_ist_run()
        if next_first5 > STALE_CHECK_INTERVAL_SECONDS:
            time.sleep(STALE_CHECK_INTERVAL_SECONDS)
            continue
        time.sleep(next_first5)
        try:
            prediction = refresh_first5_prediction()
            print(f"[scheduler] first5 prediction refreshed: {prediction.to_dict()}")
        except Exception as exc:
            print(f"[scheduler] first5 refresh failed: {exc}")
        try:
            info = refresh_daily_data()
            print(f"[scheduler] daily data refreshed: {info}")
        except Exception as exc:
            print(f"[scheduler] daily refresh failed: {exc}")
        next_close = seconds_until_next_ist_run(CLOSE_REFRESH_READY)
        if next_close > STALE_CHECK_INTERVAL_SECONDS:
            time.sleep(STALE_CHECK_INTERVAL_SECONDS)
            continue
        time.sleep(next_close)
        try:
            refresh_close_data_if_due()
        except Exception as exc:
            print(f"[scheduler] close refresh failed: {exc}")


if __name__ == "__main__":
    main()