"""Schiffsverkehr-Collector: AISStream.io WebSocket (global, Echtzeit)."""
import asyncio
import json
import logging
import os
import time

import websockets
from fastapi import APIRouter
from milship_db import get_country_from_mmsi, classify_military_ship

logger = logging.getLogger("globe.ships")
router = APIRouter()

_AISSTREAM_KEY = os.getenv("AISSTREAM_KEY", "1a56b078db829727abd4d617937bae51c6f9973e")
_AISSTREAM_URL = "wss://stream.aisstream.io/v0/stream"

# {mmsi: {mmsi, lat, lon, sog, cog, heading, name, ts}}
_store: dict[int, dict] = {}
_connected = False
_task = None


async def _listener():
    """Dauerhafter WebSocket-Client fuer AISStream."""
    global _connected
    while True:
        try:
            logger.info("AISStream: Verbinde...")
            async with websockets.connect(
                _AISSTREAM_URL, ping_interval=30, ping_timeout=10, close_timeout=5
            ) as ws:
                sub = {
                    "APIKey": _AISSTREAM_KEY,
                    "BoundingBoxes": [[[-90, -180], [90, 180]]],
                    "FilterMessageTypes": ["PositionReport"],
                }
                await ws.send(json.dumps(sub))
                _connected = True
                logger.info("AISStream: Verbunden")

                async for raw in ws:
                    try:
                        text = raw.decode("utf-8") if isinstance(raw, bytes) else raw
                        msg = json.loads(text)
                        meta = msg.get("MetaData", {})
                        mmsi = meta.get("MMSI")
                        if not mmsi:
                            continue
                        pos = msg.get("Message", {}).get("PositionReport", {})
                        lat = meta.get("latitude") or pos.get("Latitude")
                        lon = meta.get("longitude") or pos.get("Longitude")
                        if not lat or not lon or not (-90 <= lat <= 90 and -180 <= lon <= 180):
                            continue
                        ship_type = meta.get("ShipType", 0)
                        # Vorherige Position fuer Dark-Ship-Erkennung merken
                        prev = _store.get(mmsi)
                        prev_positions = (prev.get("track", []) if prev else [])[-10:]
                        prev_positions.append({"lat": round(lat, 5), "lon": round(lon, 5), "ts": time.time()})

                        _store[mmsi] = {
                            "mmsi": mmsi,
                            "lat": round(lat, 5),
                            "lon": round(lon, 5),
                            "sog": round(pos.get("Sog", 0), 1),
                            "cog": round(pos.get("Cog", 0), 1),
                            "heading": pos.get("TrueHeading", 0),
                            "name": (meta.get("ShipName") or "").strip(),
                            "ship_type": ship_type,
                            "ts": time.time(),
                            "track": prev_positions,
                        }
                        # Stale-Cleanup alle 1000 Updates
                        if len(_store) % 1000 == 0:
                            cutoff = time.time() - 900
                            stale = [k for k, v in _store.items() if v["ts"] < cutoff]
                            for k in stale:
                                del _store[k]
                            if len(_store) % 5000 == 0:
                                logger.info(f"AISStream: {len(_store)} Schiffe")
                    except Exception:
                        continue
        except Exception as e:
            _connected = False
            logger.warning(f"AISStream Fehler: {e}. Reconnect in 10s...")
            await asyncio.sleep(10)


def start_ais_collector():
    global _task
    if _task is None or _task.done():
        _task = asyncio.create_task(_listener())
        logger.info("AIS collector gestartet")


def _classify_ship(ship_type):
    """AIS Ship Type zu Kategorie."""
    if not ship_type:
        return "unknown"
    t = int(ship_type)
    if 20 <= t <= 29: return "wing_in_ground"
    if 30 <= t <= 39: return "fishing" if t == 30 else "towing" if t in (31,32) else "military" if t == 35 else "sailing" if t == 36 else "other"
    if 40 <= t <= 49: return "hsc"
    if 50 <= t <= 59: return "pilot" if t == 50 else "sar" if t == 51 else "tug" if t == 52 else "port" if t == 53 else "medical" if t == 58 else "other"
    if 60 <= t <= 69: return "passenger"
    if 70 <= t <= 79: return "cargo"
    if 80 <= t <= 89: return "tanker"
    return "other"

def _detect_dark_ships():
    """Schiffe die laenger als 10 Minuten kein Update hatten aber vorher aktiv waren."""
    now = time.time()
    dark = []
    for mmsi, s in _store.items():
        age = now - s["ts"]
        track = s.get("track", [])
        # Aktiv gewesen (>3 Positionen) aber seit >10min kein Update und SOG war > 1
        if age > 600 and len(track) >= 3 and s.get("sog", 0) > 0.5:
            dark.append({
                "mmsi": mmsi, "name": s.get("name", ""),
                "last_lat": s["lat"], "last_lon": s["lon"],
                "last_sog": s["sog"], "last_cog": s["cog"],
                "silent_minutes": round(age / 60, 1),
                "ship_type": _classify_ship(s.get("ship_type")),
            })
    return dark

@router.get("/ships")
async def get_ships():
    ships_out = []
    for s in _store.values():
        ship = dict(s)
        ship["category"] = _classify_ship(s.get("ship_type"))
        # Track auf letzte 5 Positionen kuerzen fuer API
        ship["track"] = ship.get("track", [])[-5:]
        ships_out.append(ship)
    return {"ships": ships_out, "total": len(ships_out), "connected": _connected}

@router.get("/ships/military")
async def get_military_ships():
    """Alle Militaerschiffe mit Klassifizierung und Bildern."""
    mil_ships = []
    for s in _store.values():
        if s.get("ship_type") == 35 or (isinstance(s.get("ship_type"), int) and 30 <= s["ship_type"] <= 39):
            info = classify_military_ship(s.get("mmsi"), s.get("name",""))
            mil_ships.append({
                "mmsi": s["mmsi"],
                "name": s.get("name", ""),
                "lat": s["lat"], "lon": s["lon"],
                "sog": s["sog"], "cog": s["cog"],
                "country": info["country"],
                "ship_class": info["class"],
                "ship_type_detail": info["type"],
                "image": info["image"],
            })
    return {"ships": mil_ships, "total": len(mil_ships)}

@router.get("/ships/dark")
async def get_dark_ships():
    dark = _detect_dark_ships()
    return {"dark_ships": dark, "total": len(dark)}