#!/usr/bin/env python3
"""DOLPHIN VIOLET launcher — Stage V1: observe-only runtime (DARK until keys).

VIOLET is the staged rebuild of PINK-on-DITAv2 (charter:
violet-subsecond-rebuild-plan). V1 scope, all enforced here:

- OWN namespaces everywhere: ClickHouse ``dolphin_violet``, Hazelcast
  ``DOLPHIN_STATE_VIOLET``/``DOLPHIN_PNL_VIOLET``, Zinc prefix ``violet``,
  trader id ``DOLPHIN-VIOLET-001``. Namespace isolation is a stage gate.
- OBSERVE-ONLY: the venue adapter is wrapped in ``ObserveOnlyVenue`` (order
  placement raises) AND the policy step loop is never invoked. The account
  stream folds fills/balances into the kernel and journals them; nothing is
  ever submitted.
- DARK by default: without ``BINGX_VIOLET_API_KEY``/``BINGX_VIOLET_SECRET_KEY``
  the service idles with a periodic WARNING. The scan-vs-venue divergence
  monitor (public data only) runs even while dark
  (``DOLPHIN_VIOLET_DARK_DIVERGENCE=1`` default).
- DDL discipline: this launcher NEVER creates ClickHouse objects. If the
  ``dolphin_violet`` tables are missing it logs CRITICAL naming the apply
  command (prod/clickhouse/violet/apply_violet_ddl.py) and idles dark.

Code-reuse decision (V1): import-and-parameterize from
``prod.launch_dolphin_pink`` — its import is side-effect-free (sys.path +
dotenv only; ``_apply_pink_env`` is never invoked at import). A shared
launcher-core extraction is deliberately deferred to V2, when VIOLET starts
trading and the loops converge (V2 work item per the approved plan).
"""

from __future__ import annotations

import asyncio
import logging
import os
import sys
import urllib.parse
import urllib.request
import uuid
from pathlib import Path

sys.path.insert(0, "/mnt/dolphinng5_predict")
sys.path.insert(0, "/mnt/dolphinng5_predict/nautilus_dolphin")

# Side-effect-free helpers shared with the PINK launcher (verified: importing
# the module mutates no environment).
from prod.launch_dolphin_pink import (  # noqa: E402
    _build_data_feed,
    _env_bool,
    _resolve_bingx_allow_mainnet,
    _resolve_bingx_environment,
    _resolve_bingx_exchange_leverage_cap,
    _resolve_bingx_recv_window_ms,
)
from prod.clean_arch.violet.shadow_live_factors import (  # noqa: E402
    build_shadow_live_source,
    shadow_decision_step,
)

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s %(levelname)s violet %(name)s: %(message)s",
)
LOGGER = logging.getLogger("launch_dolphin_violet")

VIOLET_DEFAULTS = {
    "strategy_name": "violet",
    "state_map": "DOLPHIN_STATE_VIOLET",
    "pnl_map": "DOLPHIN_PNL_VIOLET",
    "trader_id": "DOLPHIN-VIOLET-001",
    "journal_strategy": "violet",
    "journal_db": "dolphin_violet",
}

# Tables that must exist BEFORE this service may emit a single row.
REQUIRED_TABLES = (
    "account_events", "status_snapshots", "trade_events", "trade_exit_legs",
    "trade_reconstruction", "position_state", "policy_events",
    "anomaly_events", "v7_decision_events", "violet_feed_divergence",
)

DDL_APPLY_CMD = (
    "python3 /mnt/dolphinng5_predict/prod/clickhouse/violet/apply_violet_ddl.py"
)

_KERNEL_STATE_PATH_VIOLET = Path("/tmp/.violet_kernel_state.json")


def _apply_violet_env() -> None:
    """HARD-set (not setdefault) every namespace knob before any import that
    reads them. DITA_V2_PREFIX drives Zinc region names (violet_intent/
    _state/_control — disjoint from pink by construction)."""
    os.environ["DITA_V2_PREFIX"] = "violet"
    os.environ["DOLPHIN_STRATEGY_NAME"] = VIOLET_DEFAULTS["strategy_name"]
    os.environ["DOLPHIN_STATE_MAP"] = VIOLET_DEFAULTS["state_map"]
    os.environ["DOLPHIN_PNL_MAP"] = VIOLET_DEFAULTS["pnl_map"]
    os.environ["DOLPHIN_JOURNAL_STRATEGY"] = VIOLET_DEFAULTS["journal_strategy"]
    os.environ["DOLPHIN_JOURNAL_DB"] = VIOLET_DEFAULTS["journal_db"]
    os.environ["DOLPHIN_TRADER_ID"] = VIOLET_DEFAULTS["trader_id"]
    os.environ["DOLPHIN_BINGX_ENV"] = os.environ.get("DOLPHIN_BINGX_ENV", "VST")
    os.environ["DOLPHIN_BINGX_ALLOW_MAINNET"] = "0"   # V1 is VST-only, hard
    # Repoint the kernel snapshot file: pink_direct's module constant is a
    # fixed path (/tmp/.pink_kernel_state.json) — without this, VIOLET would
    # restore PINK's kernel state and overwrite it on fills.
    # Deferred to V2 (approved plan): parameterize the path in pink_direct.
    import prod.clean_arch.runtime.pink_direct as _pd

    _pd._KERNEL_STATE_PATH = _KERNEL_STATE_PATH_VIOLET


def _violet_keys_present() -> bool:
    return bool(
        (os.environ.get("BINGX_VIOLET_API_KEY") or "").strip()
        and (os.environ.get("BINGX_VIOLET_SECRET_KEY") or "").strip()
    )


def build_bingx_exec_client_config():
    """VIOLET's exchange config — its OWN credentials, violet journaling."""
    from prod.clean_arch.adapters.bingx_direct import (
        BingxExecClientConfig,
        BingxInstrumentProviderConfig,
    )

    return BingxExecClientConfig(
        api_key=os.environ.get("BINGX_VIOLET_API_KEY"),
        secret_key=os.environ.get("BINGX_VIOLET_SECRET_KEY"),
        environment=_resolve_bingx_environment(),
        allow_mainnet=False,                       # V1 hard guarantee
        recv_window_ms=_resolve_bingx_recv_window_ms(),
        default_leverage=int(os.environ.get("DOLPHIN_BINGX_DEFAULT_LEVERAGE", "1")),
        exchange_leverage_cap=_resolve_bingx_exchange_leverage_cap(),
        prefer_websocket=False,
        sizing_mode=os.environ.get("DOLPHIN_BINGX_SIZING_MODE", "testnet"),
        journal_strategy=VIOLET_DEFAULTS["journal_strategy"],
        journal_db=VIOLET_DEFAULTS["journal_db"],
        instrument_provider=BingxInstrumentProviderConfig(load_all=True),
    )


def _preflight_clickhouse() -> list[str]:
    """SELECT-probe every required dolphin_violet table. NEVER creates."""
    missing: list[str] = []
    ch_url = os.environ.get("CH_URL", "http://localhost:8123")
    user = os.environ.get("CH_USER", "dolphin")
    password = os.environ.get("CH_PASS", "dolphin_ch_2026")
    for table in REQUIRED_TABLES:
        q = urllib.parse.quote_plus(
            f"SELECT 0 FROM dolphin_violet.{table} LIMIT 0"
        )
        req = urllib.request.Request(f"{ch_url}/?query={q}", method="POST")
        req.add_header("X-ClickHouse-User", user)
        req.add_header("X-ClickHouse-Key", password)
        try:
            urllib.request.urlopen(req, timeout=5).read()
        except Exception:
            missing.append(table)
    return missing


def _build_observe_runtime():
    """Bundle + observe guard + violet persistence/HZ. NO policy execution."""
    from prod.ch_writer import ch_put_violet
    from prod.clean_arch.dita.decision import (
        DecisionConfig,
        DecisionEngine,
        IntentEngine,
    )
    from prod.clean_arch.dita_v2.hazelcast_projection import PinkHzStateWriter
    from prod.clean_arch.dita_v2.launcher import build_launcher_bundle
    from prod.clean_arch.persistence.pink_clickhouse import PinkClickHousePersistence
    from prod.clean_arch.runtime.pink_direct import PinkDirectRuntime
    from prod.clean_arch.violet.observe_guard import ObserveOnlyVenue

    bundle = build_launcher_bundle(
        venue_mode="BINGX", max_slots=1, bingx_config=build_bingx_exec_client_config()
    )
    kernel = bundle.kernel
    # HARD observe-only guarantee, independent of policy config.
    kernel.venue = ObserveOnlyVenue(kernel.venue)

    cfg = DecisionConfig(
        vel_div_threshold=-1.0,        # unreachable — V1 never decides anyway
        allow_short=False,
        allow_long=False,
        policy_version="violet_observe_v1",
    )
    persistence = PinkClickHousePersistence(
        kernel.account, sink=ch_put_violet, v7_sink=ch_put_violet
    )
    hz_state_writer = None
    try:
        hz_state_writer = PinkHzStateWriter(
            cluster=os.environ.get("HZ_CLUSTER", "dolphin"),
            host=os.environ.get("HZ_HOST", "localhost:5701"),
            state_map_name=VIOLET_DEFAULTS["state_map"],
            pnl_map_name=VIOLET_DEFAULTS["pnl_map"],
        )
    except Exception:
        pass  # HZ down → still observes; TUI falls back to CH

    return PinkDirectRuntime(
        data_feed=_build_data_feed(),
        kernel=kernel,
        decision_engine=DecisionEngine(cfg),
        intent_engine=IntentEngine(cfg),
        persistence=persistence,
        market_state_runtime=None,
        hz_state_writer=hz_state_writer,
    )


def _build_divergence(sink=None):
    from prod.ch_writer import ch_put_violet
    from prod.clean_arch.violet.clock import (
        PlaneClock,
        SCAN_STALENESS_NS,
        VENUE_STALENESS_NS,
    )
    from prod.clean_arch.violet.divergence import FeedDivergenceMonitor

    return FeedDivergenceMonitor(
        sink=sink or ch_put_violet,
        scan_clock=PlaneClock("scan", SCAN_STALENESS_NS),
        venue_clock=PlaneClock("venue", VENUE_STALENESS_NS),
        session_id=uuid.uuid4().hex,
    )


async def _divergence_driver(divergence, data_feed, poll_s: float, shadow=None) -> None:
    """Shared scan-sampling loop for both DARK and observe modes.

    When ``shadow`` is provided (DOLPHIN_VIOLET_DECISION_SHADOW=1), each scan is
    ALSO fed to the V3 VioletDecisionEngine and any actuated decision is journaled
    to dolphin_violet.violet_decisions. This NEVER executes — muted shadow only.
    """
    # The driver owns this feed instance and is its only connector; an
    # unconnected HazelcastDataFeed has features_map=None and every poll
    # raises 'NoneType' has no attribute 'get' at ERROR level (1 Hz).
    while True:
        ok = False
        try:
            ok = await data_feed.connect()
        except Exception as exc:  # noqa: BLE001 — sampling must never die
            LOGGER.warning("divergence data feed connect error: %s", exc)
        if ok:
            break
        LOGGER.warning("divergence data feed not connected; retrying in 5s")
        await asyncio.sleep(5.0)
    started = False
    symbol = os.environ.get("DOLPHIN_VIOLET_SNAPSHOT_SYMBOL", "BTCUSDT")
    mode = os.environ.get("DOLPHIN_VIOLET_VENUE_MID_MODE", "ws").lower()
    while True:
        try:
            snapshot = await data_feed.get_latest_snapshot(symbol)
            if snapshot is not None:
                payload = getattr(snapshot, "scan_payload", None) or {}
                assets = payload.get("assets") or []
                if not started and assets:
                    await divergence.start(
                        [str(a).upper() for a in assets], mode=mode
                    )
                    started = True
                if started:
                    divergence.on_scan(snapshot)
                if shadow is not None and started:
                    try:
                        sn = int(payload.get("scan_number") or 0)
                        vd = payload.get("vel_div")
                        if vd is not None:
                            now_ns = shadow["mono_ns"]()
                            if shadow_decision_step(
                                shadow,
                                payload,
                                scan_number=sn,
                                now_ns=now_ns,
                                vel_div=float(vd),
                                vol_ok=bool(payload.get("vol_ok", True)),
                            ):
                                shadow["live_decisions"] += 1
                    except Exception as exc:  # noqa: BLE001 — shadow must never die
                        LOGGER.debug("shadow decision failed: %s", exc)
        except Exception as exc:  # noqa: BLE001 — sampling must never die
            LOGGER.debug("divergence scan sample failed: %s", exc)
        await asyncio.sleep(poll_s)


async def _dark_idle_loop(divergence_task: asyncio.Task | None) -> None:
    msg = (
        "VIOLET DARK — BINGX_VIOLET_API_KEY/BINGX_VIOLET_SECRET_KEY not set; "
        "idling (divergence sampling %s)."
        % ("running" if divergence_task is not None else "off")
    )
    LOGGER.warning(msg)
    while True:
        await asyncio.sleep(300)
        LOGGER.warning(msg)


def _violet_table_present(table: str) -> bool:
    """One-table SELECT-probe (additive tables not in REQUIRED_TABLES preflight)."""
    ch_url = os.environ.get("CH_URL", "http://localhost:8123")
    q = urllib.parse.quote_plus(f"SELECT 0 FROM dolphin_violet.{table} LIMIT 0")
    req = urllib.request.Request(f"{ch_url}/?query={q}", method="POST")
    req.add_header("X-ClickHouse-User", os.environ.get("CH_USER", "dolphin"))
    req.add_header("X-ClickHouse-Key", os.environ.get("CH_PASS", "dolphin_ch_2026"))
    try:
        urllib.request.urlopen(req, timeout=5).read()
        return True
    except Exception:
        return False


def _build_shadow():
    """V3 shadow-decision path (DOLPHIN_VIOLET_DECISION_SHADOW=1, default OFF).

    Returns wiring dict or None. NEVER executes — journals muted decisions only.
    Self-disables if violet_decisions is absent so a missing additive DDL can
    NEVER cause a CH-flush doom-loop (the 2026-06-11 spool/disk-fill lesson).
    """
    if not _env_bool("DOLPHIN_VIOLET_DECISION_SHADOW", False):
        return None
    if not _violet_table_present("violet_decisions"):
        LOGGER.warning(
            "VIOLET shadow requested but dolphin_violet.violet_decisions is MISSING "
            "— apply 22_violet_decisions.sql; shadow DISABLED (no doom-loop)."
        )
        return None
    from prod.ch_writer import ch_put_violet
    from prod.clean_arch.violet.clock import mono_ns
    from prod.clean_arch.violet.decision_engine import VioletDecisionEngine
    from prod.clean_arch.violet.shadow_journal import VioletDecisionJournal

    sess = uuid.uuid4().hex
    capital = float(os.environ.get("DOLPHIN_VIOLET_SHADOW_CAPITAL", "69000"))
    # engine defaults == live BLUE base curve (max_leverage 9.0, vel_div_threshold -0.02).
    # DOLPHIN_VIOLET_ENTRY_VEL_DIV_THRESHOLD relaxes the entry gate VIOLET-ONLY (e.g. to
    # exercise the journal on a low-vol day). NOT BLUE-parity-faithful while relaxed.
    thr = float(os.environ.get("DOLPHIN_VIOLET_ENTRY_VEL_DIV_THRESHOLD", "-0.02"))
    relaxed = abs(thr - (-0.02)) > 1e-9
    engine = VioletDecisionEngine(entry_vel_div_threshold=thr)
    journal = VioletDecisionJournal(sink=ch_put_violet, session_id=sess)
    try:
        live_source = build_shadow_live_source()
    except Exception as exc:
        LOGGER.warning(
            "VIOLET shadow live-factor source unavailable (%s) — shadow DISABLED.",
            exc,
        )
        return None
    LOGGER.warning(
        "VIOLET DECISION SHADOW ON (session=%s ref_capital=%.0f entry_thr=%.4f%s) — "
        "journaling muted decisions to dolphin_violet.violet_decisions; NO orders.",
        sess, capital, thr,
        " RELAXED:not-parity-faithful" if relaxed else "",
    )
    return {
        "engine": engine,
        "journal": journal,
        "capital": capital,
        "mono_ns": mono_ns,
        **live_source,
        "live_decisions": 0,
        "last_live_source": None,
    }


async def run() -> None:
    _apply_violet_env()
    poll_s = float(os.environ.get("DOLPHIN_VIOLET_POLL_INTERVAL_SEC", "1.0"))

    missing = _preflight_clickhouse()
    if missing:
        LOGGER.critical(
            "dolphin_violet tables MISSING: %s — this launcher never creates "
            "tables (DDL-before-code discipline). Run: %s  — idling dark.",
            missing, DDL_APPLY_CMD,
        )
        while True:                      # dark, emitting nothing
            await asyncio.sleep(300)
            LOGGER.critical("still missing dolphin_violet tables: %s", missing)

    divergence_task = None
    if _env_bool("DOLPHIN_VIOLET_DARK_DIVERGENCE", True) or _violet_keys_present():
        divergence = _build_divergence()
        shadow = _build_shadow()
        divergence_task = asyncio.create_task(
            _divergence_driver(divergence, _build_data_feed(), poll_s, shadow=shadow),
            name="violet_divergence_driver",
        )

    if not _violet_keys_present():
        await _dark_idle_loop(divergence_task)
        return

    runtime = _build_observe_runtime()
    LOGGER.info(
        "VIOLET observe-only runtime starting: trader=%s zinc_prefix=violet "
        "hz=%s/%s ch=dolphin_violet",
        VIOLET_DEFAULTS["trader_id"], VIOLET_DEFAULTS["state_map"],
        VIOLET_DEFAULTS["pnl_map"],
    )
    await runtime.connect()
    symbol = os.environ.get("DOLPHIN_VIOLET_SNAPSHOT_SYMBOL", "BTCUSDT")
    account_sync_s = float(os.environ.get("DOLPHIN_VIOLET_ACCOUNT_SYNC_SEC", "60"))
    last_sync = 0.0
    loop = asyncio.get_running_loop()
    while True:
        try:
            snapshot = await runtime.data_feed.get_latest_snapshot(symbol)
            now = loop.time()
            if snapshot is not None and now - last_sync >= account_sync_s:
                await runtime.reconcile_account(snapshot)
                last_sync = now
            # OBSERVE-ONLY: runtime.step() is NEVER called — no decisions,
            # no intents, no orders. The account stream + persistence run
            # as connect()-spawned background tasks.
        except Exception as exc:  # noqa: BLE001 — observe loop must survive
            LOGGER.warning("observe loop iteration failed: %s", exc)
        await asyncio.sleep(poll_s)


def main() -> int:
    try:
        asyncio.run(run())
    except KeyboardInterrupt:
        LOGGER.info("VIOLET shutdown (SIGINT)")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())