"""
Production trading node (v2) — integrates all Phase 1-4 modules.

Replaces live/node.py with modular architecture:
  - Data: HyperliquidDataProvider + HyperliquidCollector
  - Analytics: AnalyticsPipeline (book → OBI, VPIN, microprice, signals)
  - Risk: Treasury (positions, PnL, circuit breakers)
  - Filter: ToxicityFilter (pre-trade VPIN gating)
  - Maker: HlMakerPool (A-S quoting per coin)
  - Monitors: CrossVenueMonitor, FundingBasisMonitor, LiquidationRiskOverlay
  - Dashboard: writes metrics to JSON for dashboard server

Usage:
    python -m live.node_v2 --testnet --coins BTC,ETH --mode paper
"""

from __future__ import annotations

import asyncio
import json
import logging
import os
import sys
import time
from pathlib import Path
from typing import Optional

sys.path.insert(0, str(Path(__file__).resolve().parent.parent))

from live.treasury import Treasury
from live.filters.toxicity import ToxicityFilter
from live.makers.hl_btc_eth import HlMakerPool
from live.integrator import AnalyticsPipeline
from live.monitors.cross_venue import CrossVenueMonitor
from live.monitors.funding_basis import FundingBasisMonitor
from live.monitors.liq_risk import LiquidationRiskOverlay

logger = logging.getLogger("ftdt-node-v2")

TESTNET_API = "https://api.hyperliquid-testnet.xyz/info"
MAINNET_API = "https://api.hyperliquid.xyz/info"

DEFAULT_COINS = ["BTC", "ETH"]


class ProductionNode:
    """Production trading node integrating analytics, risk, maker, and monitors.

    Lifecycle per tick:
      1. Fetch order books and mark prices from HL REST
      2. Feed book/trade data into AnalyticsPipeline
      3. Check Treasury circuit breakers
      4. Check ToxicityFilter
      5. Generate quotes via HlMakerPool
      6. Place orders (paper or live)
      7. Process fills, update Treasury
      8. Write dashboard metrics
      9. Check monitors (liq risk, funding, cross-venue)
    """

    def __init__(
        self,
        coins: list[str] | None = None,
        testnet: bool = True,
        mode: str = "paper",        # "paper" or "live"
        api_url: str | None = None,
        private_key: str | None = None,
        max_position_per_coin: float = 0.003,
        base_quote_size: float = 0.0002,
        initial_equity: float = 10000.0,
        tick_interval_sec: float = 2.0,
        metrics_file: str = "/tmp/ftdt-metrics-v2.json",
    ):
        self._coins = coins or DEFAULT_COINS
        self._testnet = testnet
        self._mode = mode
        self._api_url = api_url or (TESTNET_API if testnet else MAINNET_API)
        self._pk = private_key
        self._tick_interval = tick_interval_sec
        self._metrics_file = metrics_file

        # Core modules
        self._treasury = Treasury(
            initial_equity=initial_equity,
            max_position_per_asset=max_position_per_coin,
        )

        self._pipelines = {
            coin: AnalyticsPipeline()
            for coin in coins
        }

        # Maker pool
        self._maker_pool = HlMakerPool(
            treasury=self._treasury,
            maker_config={
                "base_size": base_quote_size,
                "max_spread_bps": 15.0,
                "vpin_threshold": 0.3,
                "vpin_alarm": 0.5,
            },
        )
        for coin in coins:
            self._maker_pool.add_maker(coin.upper(), max_inventory=max_position_per_coin)

        # Monitors
        self._cross_venue = CrossVenueMonitor()
        self._funding_monitor = FundingBasisMonitor()

        # State
        self._running = False
        self._tick = 0
        self._equity_history: list[dict] = []

    async def start(self):
        logger.info("Node v2 starting — %d coins, mode=%s, testnet=%s",
                     len(self._coins), self._mode, self._testnet)
        self._running = True
        self._equity_history.append({"t": time.time(), "v": self._treasury.equity})

    async def stop(self):
        self._running = False
        logger.info("Node v2 stopped — PnL: $%.2f (%.2f%%), %d trades",
                    self._treasury.total_pnl(), self._treasury.pnl_pct(),
                    self._treasury._daily_trades)

    async def run(self):
        """Main event loop."""
        await self.start()
        try:
            while self._running:
                try:
                    await self._tick_cycle()
                except Exception as e:
                    logger.error("Tick error: %s", e, exc_info=True)
                    self._treasury.record_api_error()
                await asyncio.sleep(self._tick_interval)
        finally:
            await self.stop()

    async def _tick_cycle(self):
        self._tick += 1

        # 1. Fetch data
        prices = await self._fetch_mark_prices()
        books = {}
        for coin in self._coins:
            book = await self._fetch_orderbook(coin)
            if book:
                books[coin] = book
                prices[coin] = book.get("mid", prices.get(coin, 0))

        # 2. Feed analytics pipeline
        for coin in self._coins:
            book = books.get(coin, {})
            pipeline = self._pipelines[coin]
            if book.get("bids") and book.get("asks"):
                bids = {float(px): float(sz) for px, sz in book.get("bids", [])}
                asks = {float(px): float(sz) for px, sz in book.get("asks", [])}
                pipeline.update_book(bids, asks)

        # 3. Check circuit breakers
        if self._treasury.is_halted():
            if self._tick % 30 == 0:
                logger.warning("Circuit breaker halted: %s", self._treasury.halt_reason)
            self._write_metrics()
            return

        # 4. Update makers with prices
        mid_prices = {coin: self._pipelines[coin].mid for coin in self._coins}
        self._maker_pool.observe_all(mid_prices)

        # 5. Update book info on makers
        for coin in self._coins:
            maker = self._maker_pool.get(coin)
            book = books.get(coin, {})
            if maker and book:
                bids = dict(book.get("bids", []) or [])
                asks = dict(book.get("asks", []) or [])
                bb = max(bids) if bids else 0
                ba = min(asks) if asks else 0
                maker.update_book(bb, ba)

        # 6. Generate quotes
        quotes = self._maker_pool.quote_all()

        # 7. Simulate fills (paper mode — mark-based)
        if self._mode == "paper":
            for coin in self._coins:
                q = quotes.get(coin)
                if q:
                    pipeline = self._pipelines[coin]
                    self._simulate_paper_fills(coin, q, pipeline)

        # 8. Update funding monitor
        for coin in self._coins:
            funding = await self._fetch_funding(coin)
            if funding is not None:
                self._funding_monitor.update_funding(coin, funding)

        # 9. Update cross-venue
        for coin in self._coins:
            self._cross_venue.update("hl", coin, mid_prices.get(coin, 0), time.time())

        # 10. Check liquidation risk
        liq_overlay = LiquidationRiskOverlay(self._treasury)
        for coin, status in liq_overlay.check_all().items():
            if status["level"] in ("danger", "critical"):
                logger.warning("Liquidation risk [%s]: %s — distance %.1f%%",
                               coin, status["level"], status["distance_pct"])

        # 11. Write metrics
        self._write_metrics()

        # 12. Log summary
        if self._tick % 30 == 0:
            self._log_status()

    # ── Data fetching ─────────────────────────────────────────

    async def _fetch_mark_prices(self) -> dict[str, float]:
        import requests
        try:
            resp = requests.post(self._api_url, json={"type": "metaAndAssetCtxs"}, timeout=10)
            data = resp.json()
            if isinstance(data, list) and len(data) >= 2:
                universe = data[0].get("universe", [])
                ctxs = data[1]
                prices = {}
                for i, u in enumerate(universe):
                    name = u.get("name", "")
                    if name in self._coins and i < len(ctxs):
                        prices[name] = float(ctxs[i].get("markPx", 0))
                return prices
        except Exception as e:
            logger.debug("Mark price fetch error: %s", e)
        return {}

    async def _fetch_orderbook(self, coin: str) -> dict | None:
        import requests
        try:
            resp = requests.post(self._api_url, json={"type": "l2Book", "coin": coin}, timeout=5)
            data = resp.json()
            levels = data.get("levels", [])
            if levels and len(levels) >= 2:
                bids = [(float(l["px"]), float(l["sz"])) for l in levels[0] if float(l["sz"]) > 0]
                asks = [(float(l["px"]), float(l["sz"])) for l in levels[1] if float(l["sz"]) > 0]
                bb = bids[0][0] if bids else 0
                ba = asks[0][0] if asks else 0
                return {"bids": bids, "asks": asks, "mid": (bb + ba) / 2 if bb and ba else 0}
        except Exception as e:
            logger.debug("Orderbook fetch error for %s: %s", coin, e)
        return None

    async def _fetch_funding(self, coin: str) -> float | None:
        import requests
        try:
            resp = requests.post(self._api_url, json={"type": "metaAndAssetCtxs"}, timeout=5)
            data = resp.json()
            if isinstance(data, list) and len(data) >= 2:
                universe = data[0].get("universe", [])
                ctxs = data[1]
                for i, u in enumerate(universe):
                    if u.get("name", "") == coin and i < len(ctxs):
                        return float(ctxs[i].get("funding", "0"))
        except Exception:
            pass
        return None

    # ── Paper trading ────────────────────────────────────────

    def _simulate_paper_fills(self, coin: str, quote, pipeline: AnalyticsPipeline):
        """Naive paper fill: if our bid > mid or ask < mid after some random threshold,
        simulate a fill. In production this comes from exchange WebSocket."""
        import random
        mid = pipeline.mid
        if mid <= 0:
            return

        if random.random() < 0.05:
            side = "bid" if random.random() < 0.5 else "ask"
            size = getattr(quote, f"{side}_size", 0.001)
            px = getattr(quote, side, mid)
            fee = size * px * 0.0002

            can = self._treasury.can_open(coin, side, size, px)
            if can["allowed"]:
                self._treasury.record_fill(coin, side, size, px, fee, pnl=0)
                maker = self._maker_pool.get(coin)
                if maker:
                    maker.record_fill(side, size, px, fee)

    # ── Dashboard ────────────────────────────────────────────

    def _write_metrics(self):
        equity = self._treasury.equity
        t = time.time()
        self._equity_history.append({"t": t, "v": equity})
        if len(self._equity_history) > 600:
            self._equity_history = self._equity_history[-600:]

        try:
            data = {
                "timestamp": t,
                "treasury": self._treasury.summary(),
                "analytics": {c: p.emit() for c, p in self._pipelines.items()},
                "maker": self._maker_pool.summary(),
                "funding": self._funding_monitor.summary(),
                "cross_venue": self._cross_venue.summary("BTC"),
                "equity_history": self._equity_history,
            }
            with open(self._metrics_file, "w") as f:
                json.dump(data, f, default=str)
        except IOError:
            pass

    def _log_status(self):
        treasury = self._treasury.summary()
        logger.info(
            "Tick %d | Equity: $%.0f | PnL: %.2f%% | Trades: %d | Positions: %s",
            self._tick, treasury["equity"], treasury["pnl_pct"],
            treasury["daily_trades"], treasury["positions"],
        )


# ── CLI ─────────────────────────────────────────────────────

async def _main():
    import argparse
    p = argparse.ArgumentParser(description="FTDT Quant Lab — Production Node v2")
    p.add_argument("--coins", default="BTC,ETH", help="Comma-separated coin list")
    p.add_argument("--testnet", action="store_true", default=True)
    p.add_argument("--mainnet", dest="testnet", action="store_false")
    p.add_argument("--mode", default="paper", choices=["paper", "live"])
    p.add_argument("--max-position", type=float, default=0.003)
    p.add_argument("--base-size", type=float, default=0.0002)
    p.add_argument("--equity", type=float, default=10000.0)
    p.add_argument("--tick-interval", type=float, default=2.0)
    p.add_argument("--metrics-file", default="/tmp/ftdt-metrics-v2.json")
    p.add_argument("--private-key", default=None)
    args = p.parse_args()

    logging.basicConfig(
        level=logging.INFO,
        format="%(asctime)s [%(name)s] %(message)s",
        datefmt="%H:%M:%S",
    )

    coins = [c.strip().upper() for c in args.coins.split(",")]

    node = ProductionNode(
        coins=coins,
        testnet=args.testnet,
        mode=args.mode,
        private_key=args.private_key,
        max_position_per_coin=args.max_position,
        base_quote_size=args.base_size,
        initial_equity=args.equity,
        tick_interval_sec=args.tick_interval,
        metrics_file=args.metrics_file,
    )

    try:
        await node.run()
    except KeyboardInterrupt:
        logger.info("Shutting down...")


if __name__ == "__main__":
    asyncio.run(_main())