"""Hazelcast Warm-Up from ClickHouse.

Reconstructs critical HZ map state from ClickHouse after an HZ restart.
Called on startup by MHS or as a standalone script.

HZ is RAM-only volatile — every restart wipes all state. This module
reads the last-known values from CH (the persistent audit trail) and
pre-populates HZ maps so services don't start from zero.

Maps reconstructed:
  DOLPHIN_FEATURES["exf_latest"]           — from dolphin.exf_data
  DOLPHIN_FEATURES["acb_boost"]            — from dolphin.acb_state
  DOLPHIN_FEATURES["mc_forewarner_latest"] — from dolphin.posture_events (mc_status)
  DOLPHIN_SAFETY["latest"]                 — from dolphin.posture_events
  DOLPHIN_HEARTBEAT["nautilus_flow_heartbeat"] — synthetic (marks warm-up)
  DOLPHIN_LIFECYCLE["state"]               — lifecycle sentinel

Usage:
    from hz_warmup import hz_warmup
    hz_warmup(hz_client)  # call once after HZ client connects
"""
import json
import logging
import time
import urllib.request
from datetime import datetime, timezone

log = logging.getLogger("hz_warmup")

CH_URL  = "http://localhost:8123"
CH_USER = "dolphin"
CH_PASS = "dolphin_ch_2026"
CH_DB   = "dolphin"


def _ch_query(sql: str) -> list[dict]:
    """Run a CH query, return list of row dicts. Returns [] on failure."""
    url = f"{CH_URL}/?database={CH_DB}&query={urllib.parse.quote(sql + ' FORMAT JSONEachRow')}"
    req = urllib.request.Request(url)
    req.add_header("X-ClickHouse-User", CH_USER)
    req.add_header("X-ClickHouse-Key", CH_PASS)
    try:
        with urllib.request.urlopen(req, timeout=5) as resp:
            body = resp.read().decode()
        return [json.loads(line) for line in body.strip().split("\n") if line.strip()]
    except Exception as e:
        log.warning("CH query failed: %s", e)
        return []


def _write_lifecycle(hz_client, state: str):
    """Write lifecycle sentinel to DOLPHIN_LIFECYCLE."""
    m = hz_client.get_map("DOLPHIN_LIFECYCLE").blocking()
    m.put("state", json.dumps({
        "state": state,
        "ts": datetime.now(timezone.utc).isoformat(),
        "pid": __import__("os").getpid(),
    }))
    log.info("LIFECYCLE: %s", state)


def read_lifecycle_state(hz_client) -> str:
    """Read current lifecycle state. Returns 'UNKNOWN' if not set."""
    try:
        m = hz_client.get_map("DOLPHIN_LIFECYCLE").blocking()
        raw = m.get("state")
        if raw:
            return json.loads(raw).get("state", "UNKNOWN")
    except Exception:
        pass
    return "UNKNOWN"


import urllib.parse


def hz_warmup(hz_client) -> dict:
    """Reconstruct HZ state from ClickHouse. Returns summary of what was restored."""
    summary = {}

    _write_lifecycle(hz_client, "STARTING")

    features = hz_client.get_map("DOLPHIN_FEATURES").blocking()

    # 1. ExF latest
    rows = _ch_query("SELECT * FROM exf_data ORDER BY ts DESC LIMIT 1")
    if rows:
        r = rows[0]
        exf_payload = {
            "funding_rate_btc": r.get("funding_rate", 0),
            "funding_rate_eth": r.get("funding_rate", 0),
            "dvol": r.get("dvol", 0),
            "fear_greed": r.get("fear_greed", 0),
            "taker_buy_sell_ratio": r.get("taker_ratio", 0),
            "_ok_count": 5,
            "_acb_ready": True,
            "_ts": r.get("ts", ""),
            "_source": "ch_warmup",
        }
        features.put("exf_latest", json.dumps(exf_payload))
        summary["exf_latest"] = True
        log.info("Restored exf_latest from CH (ts=%s)", r.get("ts"))

    # 2. ACB boost
    rows = _ch_query("SELECT * FROM acb_state ORDER BY ts DESC LIMIT 1")
    if rows:
        r = rows[0]
        acb_payload = {
            "boost": r.get("boost", 1.0),
            "beta": r.get("beta", 0.8),
            "signals": r.get("signals", 0),
            "_ts": r.get("ts", ""),
            "_source": "ch_warmup",
        }
        features.put("acb_boost", json.dumps(acb_payload))
        summary["acb_boost"] = True
        log.info("Restored acb_boost from CH (boost=%.2f)", r.get("boost", 0))

    # 3. Posture (DOLPHIN_SAFETY)
    rows = _ch_query("SELECT * FROM posture_events ORDER BY ts DESC LIMIT 1")
    if rows:
        r = rows[0]
        safety_payload = {
            "posture": r.get("posture", "APEX"),
            "Rm": r.get("rm", 0.97),
            "timestamp": r.get("ts", ""),
            "breakdown": {},
            "_source": "ch_warmup",
        }
        safety_map = hz_client.get_map("DOLPHIN_SAFETY").blocking()
        safety_map.put("latest", json.dumps(safety_payload))
        summary["posture"] = r.get("posture")
        log.info("Restored posture from CH: %s (Rm=%.3f)", r.get("posture"), r.get("rm", 0))

    # 4. Heartbeat (synthetic — marks that warm-up populated state)
    hb_map = hz_client.get_map("DOLPHIN_HEARTBEAT").blocking()
    hb_payload = {
        "ts": time.time(),
        "iso": datetime.now(timezone.utc).isoformat(),
        "phase": "warmup",
        "flow": "hz_warmup",
    }
    hb_map.put("nautilus_flow_heartbeat", json.dumps(hb_payload))
    summary["heartbeat"] = True

    # 5. MC-Forewarner (if available)
    rows = _ch_query("""
        SELECT ts, posture, rm,
               JSONExtractString(trigger, 'Cat2') as cat2
        FROM posture_events
        ORDER BY ts DESC LIMIT 1
    """)
    # MC status isn't directly in CH — use a safe default
    mc_payload = {
        "status": "GREEN",
        "catastrophic_prob": 0.05,
        "envelope_score": 0.95,
        "timestamp": datetime.now(timezone.utc).isoformat(),
        "_source": "ch_warmup_default",
    }
    features.put("mc_forewarner_latest", json.dumps(mc_payload))
    summary["mc_forewarner"] = True

    _write_lifecycle(hz_client, "READY")

    log.info("HZ warm-up complete: %s", summary)
    return summary


if __name__ == "__main__":
    """Standalone warm-up — run after HZ container starts."""
    import hazelcast
    logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(name)s: %(message)s")
    client = hazelcast.HazelcastClient(cluster_name="dolphin", cluster_members=["localhost:5701"])
    result = hz_warmup(client)
    print(json.dumps(result, indent=2))
    client.shutdown()