import requests
import time
import datetime
import threading
import sys
import math
import json
import random
import logging
from typing import Optional, Dict, Any

try:
    import winsound
    HAS_WINSOUND = True
except ImportError:
    HAS_WINSOUND = False

from flask import Flask, request, jsonify

# db_signals helpers you already have
from db_signals import (
    fetch_authenticity_token_and_commit_oid,
    update_user_json_file,
    get_user_json_file,  # we will call this directly
)

# ================ Configuration ================
API_URL = "https://research.titanfx.com/api/live-rate?group=forex"
API_HEADERS = {
    "referer": "https://research.titanfx.com/instruments/gbpusd",
    "sec-ch-ua": "\"Not)A;Brand\";v=\"8\", \"Chromium\";v=\"138\", \"Google Chrome\";v=\"138\"",
    "sec-ch-ua-mobile": "?0",
    "sec-ch-ua-platform": "\"Windows\"",
    "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36",
    "cookie" : "_gcl_au=1.1.1796701952.1753040046; _ga=GA1.1.1464196604.1753040048; _fbp=fb.1.1753040052093.29660603653281274; _hjSessionUser_4985643=eyJpZCI6ImM4ZTg0OTk3LTU5ZDEtNTgyNy1iZWM4LTU5NzY3NWM1MjRkMyIsImNyZWF0ZWQiOjE3NTMwNDAwNTIxMjEsImV4aXN0aW5nIjp0cnVlfQ==; _ga_7LY18X3L6E=GS2.1.s1753275944$o4$g1$t1753276250$j58$l0$h0; _ga_SQJ616MYN2=GS2.1.s1753275944$o4$g1$t1753276250$j58$l0$h0; cto_bundle=Bakc1F9RUThHYzllMGNLQWR2aVlCYVl6SVpkWmNsJTJCdFdTbTAwdGp6RXN1NXZHNExiVEF3ZjN1aHBKZHFYZWZMdW9XJTJCUnlSVUR0MSUyQlFMRVpTQTRZZ3BIRm1HRzlkV2pneDVWZWRON0pwbk54bnA5QmcyRThTemhuZ09Tenc4dWFWJTJGQnAlMkZXYTdla3pHNnpKTmZaNmtVREh3dTRMN1N5Vk9WaWV4bGpXdFlNdk9MME5OOUJVeVF2WGMlMkJxbFNQaWpBNmY2c0g0MUd4YVc2SWNsQVE4ZWZaRW84d2JnJTNEJTNE"
}

SYMBOL_DEFAULT = "XAUUSD"

# Polling and retry behavior
REQUEST_TIMEOUT_SECONDS = 4
MAX_RETRIES = 5
RETRY_BACKOFF_SECONDS = 1.2

# Tick cadence
MIN_TICK_SLEEP_SEC = 0.35
MAX_TICK_SLEEP_SEC = 0.6
PRINT_EVERY_N_TICKS = 12

# External systems
ANALYSIS_BASE = "https://dooratre-xauusd-pro.hf.space"
ANALYSIS_STOP_URL = f"{ANALYSIS_BASE}/stop_analysis"
ANALYSIS_NOW_URL = f"{ANALYSIS_BASE}/analysis_now"
OTHER_ALERT_CLEAR_URL = "https://dooratre-alert.hf.space/cancel"

# User message API
MESSAGE_API_URL = "https://aoamrnuwara.pythonanywhere.com/api/send-message"
MESSAGE_API_KEY = "Seakp0683asppoit"

# Flask app
app = Flask(__name__)

# Logger
logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
logger = logging.getLogger("signal-alert-pro")

# ================ Active State ================
ACTIVE_MONITOR = {
    "thread": None,
    "cancel_token": None,
    "id": None,
    "symbol": SYMBOL_DEFAULT,
    "side": None,
    "entry": None,
    "tp": None,
    "sl": None,
    "timestamps": None  # preserved for /ts_points
}
ACTIVE_LOCK = threading.Lock()

# New: single activator governance
ACTIVE_ACTIVATOR = {
    "thread": None,
    "cancel_token": None,
    "id": None
}
ACTIVATOR_LOCK = threading.Lock()

# Latch to prevent duplicate activations
ACTIVATION_LATCH = threading.Event()

# ================ db_signals reader helper ================
def read_user_json_file(authenticity_token: str, commit_oid: str):
    res = get_user_json_file(authenticity_token, commit_oid)
    if not res.get("success"):
        raise RuntimeError(f"Failed to read user json file: {res}")
    content = res.get("content", "")
    if not content:
        return []
    try:
        return json.loads(content)
    except Exception:
        logger.warning("[GITHUB] JSON parse failed; treating as empty []")
        return []

# ================ Utilities ================
def safe_float_join(whole, decimal):
    try:
        return float(f"{whole}.{decimal}")
    except Exception:
        try:
            return float(f"{whole}.{int(decimal)}")
        except Exception:
            return None

def ts(dt=None):
    return (dt or datetime.datetime.now()).strftime('%H:%M:%S')

def random_sleep_tick():
    time.sleep(random.uniform(MIN_TICK_SLEEP_SEC, MAX_TICK_SLEEP_SEC))

def now_utc():
    return datetime.datetime.now(datetime.timezone.utc)

def fetch_scenario_with_retries(max_attempts=5, delay_sec=3):
    for attempt in range(1, max_attempts + 1):
        scen = fetch_current_scenario_struct()
        if scen and "scenario" in scen:
            return scen
        if attempt < max_attempts:
            time.sleep(delay_sec)
    return None

def format_zone_times(dt_utc: datetime.datetime) -> Dict[str, Any]:
    def last_sunday(year, month):
        d = datetime.datetime(year, month, 31, tzinfo=datetime.timezone.utc)
        while d.weekday() != 6:
            d -= datetime.timedelta(days=1)
        return d

    def nth_weekday_of_month(year, month, weekday, n):
        d = datetime.datetime(year, month, 1, tzinfo=datetime.timezone.utc)
        while d.weekday() != weekday:
            d += datetime.timedelta(days=1)
        d += datetime.timedelta(days=7*(n-1))
        return d

    y = dt_utc.year

    last_sun_march = last_sunday(y, 3).replace(hour=1, minute=0, second=0, microsecond=0)
    last_sun_oct = last_sunday(y, 10).replace(hour=1, minute=0, second=0, microsecond=0)
    london_is_bst = last_sun_march <= dt_utc < last_sun_oct
    london_offset = datetime.timedelta(hours=1 if london_is_bst else 0)
    london_sfx = "BST" if london_is_bst else "GMT"
    london_time = (dt_utc + london_offset).replace(tzinfo=None)

    second_sun_march = nth_weekday_of_month(y, 3, 6, 2).replace(hour=7)
    first_sun_nov = nth_weekday_of_month(y, 11, 6, 1).replace(hour=6)
    ny_is_edt = second_sun_march <= dt_utc < first_sun_nov
    ny_offset = datetime.timedelta(hours=-4 if ny_is_edt else -5)
    ny_sfx = "EDT" if ny_is_edt else "EST"
    ny_time = (dt_utc + ny_offset).replace(tzinfo=None)

    tokyo_time = (dt_utc + datetime.timedelta(hours=9)).replace(tzinfo=None)

    first_sun_oct = nth_weekday_of_month(y, 10, 6, 1).replace(hour=16)
    first_sun_apr = nth_weekday_of_month(y, 4, 6, 1).replace(hour=16)
    syd_is_aedt = (dt_utc >= first_sun_oct) or (dt_utc < first_sun_apr)
    sydney_offset = datetime.timedelta(hours=11 if syd_is_aedt else 10)
    sydney_sfx = "AEDT" if syd_is_aedt else "AEST"
    sydney_time = (dt_utc + sydney_offset).replace(tzinfo=None)

    return {
        "zones": {
            "Greenwich": f"{dt_utc.replace(tzinfo=None).strftime('%Y-%m-%d %H:%M:%S')} UTC",
            "London": f"{london_time.strftime('%Y-%m-%d %H:%M:%S')} {london_sfx}",
            "New York": f"{ny_time.strftime('%Y-%m-%d %H:%M:%S')} {ny_sfx}",
            "Tokyo": f"{tokyo_time.strftime('%Y-%m-%d %H:%M:%S')} JST",
            "Sydney": f"{sydney_time.strftime('%Y-%m-%d %H:%M:%S')} {sydney_sfx}",
        },
        "iso_utc": dt_utc.isoformat()
    }

def send_message_to_users(message: str, max_retries=5, retry_delay=10):
    headers = {
        "Content-Type": "application/json",
        "X-API-Key": MESSAGE_API_KEY
    }
    payload = {"message": message}
    for attempt in range(1, max_retries + 1):
        try:
            response = requests.post(MESSAGE_API_URL, headers=headers, data=json.dumps(payload), timeout=8)
            if response.status_code == 200:
                logger.info(f"Message sent to users successfully on attempt {attempt}")
                return {"success": True, "response": response.json() if response.content else {}}
            else:
                logger.warning(f"Attempt {attempt}: Users API status {response.status_code}, body: {response.text[:200]}")
        except requests.exceptions.RequestException as e:
            logger.warning(f"Attempt {attempt}: Users API request failed: {e}")
        if attempt < max_retries:
            time.sleep(retry_delay)
        else:
            logger.error("Max retries reached. Failed to send user message.")
    return {"success": False, "error": "Failed after retries"}

def play_alert_sound():
    def _beep():
        if HAS_WINSOUND:
            try:
                for _ in range(3):
                    winsound.Beep(1000, 350)
                    time.sleep(0.15)
            except Exception:
                for _ in range(3):
                    sys.stdout.write('\a'); sys.stdout.flush()
                    time.sleep(0.2)
        else:
            for _ in range(3):
                sys.stdout.write('\a'); sys.stdout.flush()
                time.sleep(0.2)
    threading.Thread(target=_beep, daemon=True).start()

# ================ Prices ================
def get_current_price(symbol=SYMBOL_DEFAULT):
    try:
        r = requests.get(API_URL, headers=API_HEADERS, timeout=REQUEST_TIMEOUT_SECONDS)
        r.raise_for_status()
        data = r.json()
        if symbol not in data:
            logger.warning(f"[DATA] Symbol {symbol} not found in feed.")
            return None
        row = data[symbol]
        if not isinstance(row, list) or len(row) < 4:
            logger.warning(f"[DATA] Unexpected data format for {symbol}.")
            return None
        bid = safe_float_join(row[0], row[1])
        ask = safe_float_join(row[2], row[3])
        if bid is None or ask is None or math.isnan(bid) or math.isnan(ask):
            logger.warning(f"[DATA] Invalid price values for {symbol}.")
            return None
        return {"bid": bid, "ask": ask}
    except requests.RequestException as e:
        logger.warning(f"[NETWORK] {e}")
        return None
    except Exception as e:
        logger.warning(f"[ERROR] Unexpected: {e}")
        return None

def mid_price(bid: float, ask: float) -> float:
    return (bid + ask) / 2.0

# ================ External orchestration ================
def call_stop_analysis_and_clear_others(session_id="default"):
    # Stop analysis with proper POST + JSON payload
    try:
        headers = {"Content-Type": "application/json", "Accept": "application/json"}
        payload = {"session_id": str(session_id)}
        resp = requests.post(ANALYSIS_STOP_URL, headers=headers, json=payload, timeout=8)
        try:
            body = resp.json()
        except Exception:
            body = {"raw_text": resp.text[:300]}
        if resp.status_code != 200 or not body.get("success", False):
            logger.warning(f"[ANALYSIS] stop_analysis returned {resp.status_code}: {body}")
        else:
            logger.info(f"[ANALYSIS] stop_analysis OK: {body.get('message','')}")
    except Exception as e:
        logger.warning(f"[ANALYSIS] stop_analysis request failed: {e}")

    # Clear other alerts (kept as GET unless your endpoint needs POST)
    try:
        resp2 = requests.get(OTHER_ALERT_CLEAR_URL, timeout=5)
        if resp2.status_code != 200:
            logger.warning(f"[ALERT] clear returned {resp2.status_code}: {resp2.text[:200]}")
        else:
            logger.info("[ALERT] clear OK")
    except Exception as e:
        logger.warning(f"[ALERT] clear failed: {e}")

def call_analysis_now(text: str):
    try:
        headers = {"Content-Type": "application/json"}
        payload = {"message": text}
        requests.post(ANALYSIS_NOW_URL, headers=headers, json=payload, timeout=8)
    except Exception as e:
        logger.warning(f"[ANALYSIS] analysis_now failed: {e}")

# ================ GitHub writers =================
def write_active_scenario_to_github(pair: str, side: str, entry: str, sl: str, tp: str, dt_utc: datetime.datetime, preserve_timestamps: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
    """
    Writes signals.json as a single-element array [ { active_trade } ].
    If preserve_timestamps provided, keep it; else compute fresh timestamps.
    """
    timestamps = preserve_timestamps if preserve_timestamps else format_zone_times(dt_utc)
    active_obj = {
        "pair": pair,
        "type": side,
        "entry": str(entry),
        "stop_loss": str(sl),
        "take_profit": str(tp),
        "timestamps": timestamps
    }
    payload_array = [active_obj]
    new_content = json.dumps(payload_array, ensure_ascii=False)

    try:
        authenticity_token, commit_oid = fetch_authenticity_token_and_commit_oid()
        if not authenticity_token or not commit_oid:
            msg = "Failed to get authenticity_token/commit_oid."
            logger.error(f"[GITHUB] {msg}")
            return {"success": False, "message": msg}
        result = update_user_json_file(authenticity_token, commit_oid, new_content)
        if result.get("success"):
            logger.info("[GITHUB] signals updated with active scenario (array).")
            return {"success": True}
        else:
            logger.error(f"[GITHUB] Update failed: {result}")
            return {"success": False, "message": result.get("message", "Unknown error")}
    except Exception as e:
        logger.error(f"[GITHUB] Exception: {e}")
        return {"success": False, "message": str(e)}

def clear_github_signals_to_empty_list() -> Dict[str, Any]:
    """
    Clears the db_signals file to [] after SL/TP hit.
    """
    try:
        authenticity_token, commit_oid = fetch_authenticity_token_and_commit_oid()
        if not authenticity_token or not commit_oid:
            return {"success": False, "message": "Failed to get auth/commit"}
        result = update_user_json_file(authenticity_token, commit_oid, "[]")
        if result.get("success"):
            logger.info("[GITHUB] signals cleared to []")
            return {"success": True}
        return {"success": False, "message": str(result)}
    except Exception as e:
        logger.error(f"[GITHUB] clear exception: {e}")
        return {"success": False, "message": str(e)}

# ================ Scenario fetcher ================
def fetch_current_scenario_struct() -> Optional[Dict[str, Any]]:
    """
    Reads the pre-activation scenario JSON when signals.json is an array:
    [ { "scenario": { "Buy": {"at": "...", "SL": "...", "TP": "..."},
                      "Sell": {"at": "...", "SL": "...", "TP": "..."},
                      "timestamps": {...} } } ]
    Returns {"scenario": {...}} or None.
    """
    try:
        authenticity_token, commit_oid = fetch_authenticity_token_and_commit_oid()
        if not authenticity_token or not commit_oid:
            logger.error("[GITHUB] Missing auth tokens to read scenario")
            return None

        content = read_user_json_file(authenticity_token, commit_oid)

        # Handle [] formats
        if isinstance(content, list):
            if not content:
                return None
            first = content[0]
            if isinstance(first, dict) and "scenario" in first:
                return first  # {"scenario": {...}}
            else:
                return None

        # Fallback for older dict format
        if isinstance(content, dict) and "scenario" in content:
            return content

        return None
    except Exception as e:
        logger.warning(f"[SCENARIO] fetch failed: {e}")
        return None

# ================ Activation helpers ================
class CancelToken:
    def __init__(self):
        self._cancel = False
        self._lock = threading.Lock()
    def cancel(self):
        with self._lock:
            self._cancel = True
    def is_cancelled(self):
        with self._lock:
            return self._cancel

def init_price_snapshot(symbol) -> Optional[Dict[str, float]]:
    retries, snap = 0, None
    while retries < MAX_RETRIES and snap is None:
        snap = get_current_price(symbol)
        if snap is None:
            retries += 1
            if retries < MAX_RETRIES:
                time.sleep(RETRY_BACKOFF_SECONDS * retries)
            else:
                return None
    return snap

def detect_cross(prev_price: float, curr_price: float, level: float, direction: Optional[str]) -> bool:
    if direction == "up":
        return prev_price < level <= curr_price
    elif direction == "down":
        return prev_price > level >= curr_price
    else:
        return (prev_price < level <= curr_price) or (prev_price > level >= curr_price)

def price_crossing_to_activate(side: str, entry: float, prev: float, curr: float) -> bool:
    if side == "Buy":
        return prev < entry <= curr
    else:
        return prev > entry >= curr

def wait_until_activation_dual(buy_entry: Optional[float],
                               sell_entry: Optional[float],
                               symbol: str,
                               cancel_token: "CancelToken",
                               max_minutes: int = 240) -> Optional[Dict[str, float]]:
    if buy_entry is None and sell_entry is None:
        return None
    snap = init_price_snapshot(symbol)
    if snap is None:
        logger.error("[ACTIVATOR] Initial price fetch failed.")
        return None
    prev = mid_price(snap["bid"], snap["ask"])
    t_end = datetime.datetime.now() + datetime.timedelta(minutes=max_minutes)
    tick = 0
    if buy_entry is not None and abs(prev - buy_entry) < 1e-9:
        return {"side": "Buy", "price": prev}
    if sell_entry is not None and abs(prev - sell_entry) < 1e-9:
        return {"side": "Sell", "price": prev}
    while datetime.datetime.now() < t_end and not cancel_token.is_cancelled():
        q = get_current_price(symbol)
        if q is None:
            time.sleep(0.5)
            continue
        curr = mid_price(q["bid"], q["ask"])
        # Sell first then Buy (stable tie-break)
        if sell_entry is not None and price_crossing_to_activate("Sell", sell_entry, prev, curr):
            return {"side": "Sell", "price": curr}
        if buy_entry is not None and price_crossing_to_activate("Buy", buy_entry, prev, curr):
            return {"side": "Buy", "price": curr}
        tick += 1
        if tick % PRINT_EVERY_N_TICKS == 0:
            logger.info(f"[{ts()}] Waiting activation Buy@{buy_entry} Sell@{sell_entry}, now {curr:.3f}")
        prev = curr
        random_sleep_tick()
    return None

# ================ SL/TP monitor ================
def start_sl_tp_monitor(side: str, entry: float, sl: float, tp: float, symbol: str = SYMBOL_DEFAULT):
    cancel_token = CancelToken()
    monitor_id = f"{int(time.time()*1000)}-{random.randint(1000,9999)}"

    def _runner():
        try:
            snap = init_price_snapshot(symbol)
            if snap is None:
                logger.error("[MONITOR] Unable to retrieve initial price snapshot.")
                return
            bid0, ask0 = snap["bid"], snap["ask"]
            price0 = mid_price(bid0, ask0)
            prev_price = price0
            hi_bid = bid0
            lo_ask = ask0

            if side == "Buy":
                tp_dir = "up" if tp >= entry else None
                sl_dir = "down" if sl <= entry else None
            else:
                tp_dir = "down" if tp <= entry else None
                sl_dir = "up" if sl >= entry else None

            tick = 0
            while not cancel_token.is_cancelled():
                q = get_current_price(symbol)
                if q is None:
                    time.sleep(0.6)
                    continue
                bid, ask = q["bid"], q["ask"]
                price_now = mid_price(bid, ask)
                hi_bid = max(hi_bid, bid)
                lo_ask = min(lo_ask, ask)

                hit = None
                if detect_cross(prev_price, price_now, sl, sl_dir):
                    hit = ("SL", sl)
                if hit is None and detect_cross(prev_price, price_now, tp, tp_dir):
                    hit = ("TP", tp)

                if hit:
                    play_alert_sound()
                    hit_type, hit_price = hit
                    # 1) Notify user immediately
                    msg = f"{side.upper()} SIGNAL {hit_type} hit at {hit_price}\nEntry: {entry}\nTP: {tp}\nSL: {sl}\nPair: {symbol}"
                    send_message_to_users(msg)

                    # 2) Clear db_signals to []
                    try:
                        clear_github_signals_to_empty_list()
                    except Exception as e:
                        logger.warning(f"[GITHUB] clearing after hit failed: {e}")

                    # 3) Stop analysis and other alert system again
                    call_stop_analysis_and_clear_others()

                    # 4) Notify analysis of the result
                    analysis_msg = f"{symbol} {side} trade {hit_type} reached at {hit_price} (entry {entry}, TP {tp}, SL {sl})."
                    call_analysis_now(analysis_msg)

                    logger.info(f"[MONITOR-END] {side} {hit_type} hit.")
                    return

                tick += 1
                if tick % PRINT_EVERY_N_TICKS == 0:
                    logger.info(f"[{ts()}] {symbol} {side} Mid {price_now:.3f} | Bid {bid:.3f}(hi {hi_bid:.3f}) | Ask {ask:.3f}(lo {lo_ask:.3f}) | TP {tp} / SL {sl}")
                prev_price = price_now
                random_sleep_tick()
        except Exception as e:
            logger.error(f"[MONITOR-THREAD] Error: {e}")
        finally:
            with ACTIVE_LOCK:
                if ACTIVE_MONITOR.get("id") == monitor_id:
                    ACTIVE_MONITOR["thread"] = None
                    ACTIVE_MONITOR["cancel_token"] = None

    t = threading.Thread(target=_runner, daemon=True)
    with ACTIVE_LOCK:
        # Cancel any running monitor before starting a new one
        if ACTIVE_MONITOR["cancel_token"]:
            ACTIVE_MONITOR["cancel_token"].cancel()
        ACTIVE_MONITOR["thread"] = t
        ACTIVE_MONITOR["cancel_token"] = cancel_token
        ACTIVE_MONITOR["id"] = monitor_id
        ACTIVE_MONITOR["symbol"] = symbol
        ACTIVE_MONITOR["side"] = side
        ACTIVE_MONITOR["entry"] = entry
        ACTIVE_MONITOR["tp"] = tp
        ACTIVE_MONITOR["sl"] = sl
        # timestamps remains as is (set by activator)
    t.start()

# ================ API Endpoints ================
@app.route("/track", methods=["POST"])
def track_signal():
    """
    Accepts: {"Buy": number?, "Sell": number?}
    Behavior:
      - Stop analysis and clear other alert (immediately).
      - Cancel any existing activation/monitor (newest wins).
      - Start watcher for activation of Buy/Sell. On first hit (latched):
          * Play sound
          * Use cached SL/TP from scenario read at start
          * Write active array [ {...} ] with timestamps for the start moment
          * Send user "BUY NOW/SELL NOW..." message (once)
          * Start SL/TP monitor
          * Notify analysis via analysis_now
      - Respond 200 immediately after accepting.
    """
    try:
        data = request.get_json(force=True)
    except Exception:
        return jsonify({"status": "error", "message": "Invalid JSON"}), 400

    buy_at = data.get("Buy")
    sell_at = data.get("Sell")

    if buy_at is None and sell_at is None:
        return jsonify({"status": "error", "message": "Provide Buy or Sell or both"}), 400

    if buy_at is not None:
        try:
            buy_at = float(buy_at)
        except Exception:
            return jsonify({"status": "error", "message": "Buy must be numeric"}), 400

    if sell_at is not None:
        try:
            sell_at = float(sell_at)
        except Exception:
            return jsonify({"status": "error", "message": "Sell must be numeric"}), 400

    # 1) Stop external analysis and other alert now
    call_stop_analysis_and_clear_others()

    # 2) Cancel any current SL/TP monitor operation and reset active monitor state
    with ACTIVE_LOCK:
        if ACTIVE_MONITOR["cancel_token"]:
            ACTIVE_MONITOR["cancel_token"].cancel()
        ACTIVE_MONITOR["thread"] = None
        ACTIVE_MONITOR["cancel_token"] = None
        ACTIVE_MONITOR["id"] = None
        ACTIVE_MONITOR["symbol"] = SYMBOL_DEFAULT
        ACTIVE_MONITOR["side"] = None
        ACTIVE_MONITOR["entry"] = None
        ACTIVE_MONITOR["tp"] = None
        ACTIVE_MONITOR["sl"] = None
        ACTIVE_MONITOR["timestamps"] = None

    # 3) Cancel any existing activator and set up new one
    with ACTIVATOR_LOCK:
        if ACTIVE_ACTIVATOR["cancel_token"]:
            ACTIVE_ACTIVATOR["cancel_token"].cancel()
        ACTIVATION_LATCH.clear()  # new cycle, no activation yet

        activator_cancel = CancelToken()
        activator_id = f"act-{int(time.time()*1000)}-{random.randint(1000,9999)}"

        def _activator():
            try:
                # Read scenario once and cache SL/TP locally to avoid race
                scenario_blob = fetch_scenario_with_retries(max_attempts=5, delay_sec=3)
                if not scenario_blob or "scenario" not in scenario_blob:
                    logger.error("[ACTIVATOR] Missing scenario data before waiting (after retries).")
                    send_message_to_users("ERROR: Missing scenario structure before activation (after retries). Please set scenario and retry.")
                    return

                scen = scenario_blob["scenario"]
                # Extract SL/TP for both sides if present
                buy_sl = buy_tp = sell_sl = sell_tp = None
                if "Buy" in scen:
                    try:
                        buy_sl = float(scen["Buy"].get("SL")) if scen["Buy"].get("SL") is not None else None
                        buy_tp = float(scen["Buy"].get("TP")) if scen["Buy"].get("TP") is not None else None
                    except Exception:
                        logger.error("[ACTIVATOR] Invalid Buy SL/TP in scenario.")
                if "Sell" in scen:
                    try:
                        sell_sl = float(scen["Sell"].get("SL")) if scen["Sell"].get("SL") is not None else None
                        sell_tp = float(scen["Sell"].get("TP")) if scen["Sell"].get("TP") is not None else None
                    except Exception:
                        logger.error("[ACTIVATOR] Invalid Sell SL/TP in scenario.")

                # Optional timestamps from scenario pre-activation are not used here; we create fresh on activate

                act = wait_until_activation_dual(
                    buy_entry=buy_at,
                    sell_entry=sell_at,
                    symbol=SYMBOL_DEFAULT,
                    cancel_token=activator_cancel,
                    max_minutes=240
                )
                if act is None:
                    logger.info("[ACTIVATOR] Cancelled or timed out.")
                    return

                # Latch: only the first activator proceeds
                if ACTIVATION_LATCH.is_set():
                    logger.info("[ACTIVATOR] Activation already handled by another thread. Exiting.")
                    return
                ACTIVATION_LATCH.set()

                chosen_side = act["side"]
                entry_used = act["price"]

                # Choose SL/TP from cached scenario
                if chosen_side == "Buy":
                    sl_f, tp_f = buy_sl, buy_tp
                else:
                    sl_f, tp_f = sell_sl, sell_tp

                if sl_f is None or tp_f is None:
                    # Cannot proceed without points
                    logger.error(f"[ACTIVATOR] Missing SL/TP for {chosen_side}.")
                    send_message_to_users(f"ERROR: Missing scenario SL/TP for {chosen_side} at {entry_used}")
                    return

                play_alert_sound()

                # 3) Write active array with fresh timestamps
                dt_utc = now_utc()
                ts_block = format_zone_times(dt_utc)
                wr = write_active_scenario_to_github(
                    pair=SYMBOL_DEFAULT,
                    side=chosen_side,
                    entry=str(entry_used),
                    sl=str(sl_f),
                    tp=str(tp_f),
                    dt_utc=dt_utc
                )
                if not wr.get("success"):
                    logger.warning(f"[GITHUB] Write failed: {wr}")

                # Save timestamps in memory to preserve on /ts_points updates
                with ACTIVE_LOCK:
                    ACTIVE_MONITOR["timestamps"] = ts_block

                # 4) Notify users (once)
                user_msg = f"{chosen_side.upper()} NOW at {entry_used}\nSL: {sl_f}\nTP: {tp_f}\nPair: {SYMBOL_DEFAULT}"
                send_message_to_users(user_msg)

                # 5) Inform analysis
                call_analysis_now(f"Scenario {chosen_side} activated for {SYMBOL_DEFAULT} at {entry_used}. SL {sl_f}, TP {tp_f}.")

                # 6) Start SL/TP monitor
                start_sl_tp_monitor(side=chosen_side, entry=entry_used, sl=sl_f, tp=tp_f, symbol=SYMBOL_DEFAULT)

            except Exception as e:
                logger.error(f"[ACTIVATOR] Error: {e}")
            finally:
                with ACTIVATOR_LOCK:
                    if ACTIVE_ACTIVATOR["id"] == activator_id:
                        ACTIVE_ACTIVATOR["thread"] = None
                        ACTIVE_ACTIVATOR["cancel_token"] = None
                        ACTIVE_ACTIVATOR["id"] = None

        t = threading.Thread(target=_activator, daemon=True)
        ACTIVE_ACTIVATOR["thread"] = t
        ACTIVE_ACTIVATOR["cancel_token"] = activator_cancel
        ACTIVE_ACTIVATOR["id"] = activator_id
        t.start()

    return jsonify({"status": "accepted", "message": f"Tracking activation for Buy at {buy_at} and/or Sell at {sell_at} started."}), 200

@app.route("/ts_points", methods=["POST"])
def ts_points():
    """
    Accepts: {"TP": "...", "SL": "..."} to update active trade points.
    Behavior:
      - Requires an active trade.
      - Cancel current monitor and restart with the updated levels.
      - DO NOT change the activation timestamps (trade start time).
      - Rewrite GitHub active array with preserved timestamps.
      - Notify users and analysis.
    """
    try:
        data = request.get_json(force=True)
    except Exception:
        return jsonify({"status": "error", "message": "Invalid JSON"}), 400

    tp_new = data.get("TP")
    sl_new = data.get("SL")
    if tp_new is None and sl_new is None:
        return jsonify({"status": "error", "message": "Provide TP or SL"}), 400

    with ACTIVE_LOCK:
        if ACTIVE_MONITOR["id"] is None or ACTIVE_MONITOR["side"] is None:
            return jsonify({"status": "error", "message": "No active trade to update"}), 400

        # Parse and stage updates
        if tp_new is not None:
            try:
                ACTIVE_MONITOR["tp"] = float(tp_new)
            except Exception:
                return jsonify({"status": "error", "message": "Invalid TP"}), 400
        if sl_new is not None:
            try:
                ACTIVE_MONITOR["sl"] = float(sl_new)
            except Exception:
                return jsonify({"status": "error", "message": "Invalid SL"}), 400

        side = ACTIVE_MONITOR["side"]
        entry = ACTIVE_MONITOR["entry"]
        symbol = ACTIVE_MONITOR["symbol"]
        tp = ACTIVE_MONITOR["tp"]
        sl = ACTIVE_MONITOR["sl"]
        preserved_ts = ACTIVE_MONITOR["timestamps"]

        if ACTIVE_MONITOR["cancel_token"]:
            ACTIVE_MONITOR["cancel_token"].cancel()

    # Restart monitor with new TP/SL
    start_sl_tp_monitor(side=side, entry=entry, sl=sl, tp=tp, symbol=symbol)

    # Update GitHub record preserving timestamps
    wr = write_active_scenario_to_github(
        pair=symbol,
        side=side,
        entry=str(entry),
        sl=str(sl),
        tp=str(tp),
        dt_utc=now_utc(),  # ignored when preserve_timestamps provided
        preserve_timestamps=preserved_ts
    )
    if not wr.get("success"):
        logger.warning(f"[GITHUB] Update after TS change failed: {wr}")

    # Notify users and analysis about the update (optional; you can enable if needed)
    try:
        send_message_to_users(f"{side.upper()} TP/SL updated\nEntry: {entry}\nTP: {tp}\nSL: {sl}\nPair: {symbol}")
        call_analysis_now(f"{symbol} {side} TP/SL updated. Entry {entry}, TP {tp}, SL {sl}.")
    except Exception:
        pass

    return jsonify({"status": "ok", "message": "TP/SL updated and tracking restarted"}), 200

@app.route("/", methods=["GET"])
def root():
    return jsonify({
        "service": "Signal Trade Activation & SL/TP Tracking (PRO)",
        "symbol": SYMBOL_DEFAULT,
        "routes": {
            "POST /track": "Payload: { 'Buy': price?, 'Sell': price? }. Starts activation tracking. Newest wins.",
            "POST /ts_points": "Payload: { 'TP': new_tp?, 'SL': new_sl? }. Updates active trade without changing start time."
        },
        "notes": [
            "Only one activator and one monitor run at a time; newest /track cancels previous.",
            "Activation uses a latch so only one activation proceeds even under concurrency.",
            "Scenario SL/TP are cached at activator start; no GitHub reads at activation moment.",
            "On SL/TP hit: notify user, clear db_signals to [], stop analysis & clear other alert, and inform analysis.",
            "On /ts_points: timestamps in GitHub are preserved (trade start time)."
        ]
    }), 200

# ================ Main ================
if __name__ == "__main__":
    app.run(host="0.0.0.0", port=7860, debug=False, threaded=True)