from __future__ import annotations

import asyncio
import json
from datetime import datetime, timezone

import websockets

from .bitstamp import BitstampClient
from .repo import get_account, get_account_secrets
from .storage import get_connection

WS_URL = "wss://ws.bitstamp.net"
WS_RECONNECT_SECONDS = 5
WS_HEARTBEAT_SECONDS = 15


async def private_ws_main(stop_event: asyncio.Event) -> None:
    while not stop_event.is_set():
        try:
            await _run_once(stop_event)
        except asyncio.CancelledError:
            raise
        except Exception:
            await asyncio.sleep(WS_RECONNECT_SECONDS)


async def _run_once(stop_event: asyncio.Event) -> None:
    accounts = [a for a in __import__("exec_mcp.repo", fromlist=["list_accounts"]).list_accounts(enabled_only=True) if a["venue"] == "bitstamp"]
    if not accounts:
        await asyncio.sleep(WS_RECONNECT_SECONDS)
        return

    async with websockets.connect(WS_URL, ping_interval=None) as ws:
        for account in accounts:
            token_info = _get_token(account["id"])
            await ws.send(json.dumps({"event": "bts:subscribe", "data": {"channel": f"private-my_orders_{account['venue_account_ref']}-{token_info['user_id']}", "auth": token_info["token"]}}))

        while not stop_event.is_set():
            try:
                message = await asyncio.wait_for(ws.recv(), timeout=WS_HEARTBEAT_SECONDS)
            except asyncio.TimeoutError:
                await ws.send(json.dumps({"event": "bts:heartbeat"}))
                continue
            _handle_message(json.loads(message))


def _get_token(account_id: str) -> dict:
    account = get_account(account_id)
    secrets = get_account_secrets(account_id)
    client = BitstampClient(account["venue_account_ref"], secrets["api_key"], secrets["api_secret"])
    return client.websocket_token()


def _handle_message(payload: dict) -> None:
    event = payload.get("event")
    if not event:
        return
    data = payload.get("data") or {}
    order_id = data.get("id") or data.get("order_id")
    if not order_id:
        return
    captured_at = datetime.now(timezone.utc).isoformat()
    with get_connection() as conn:
        conn.execute(
            "UPDATE order_records SET status = ?, payload_json = ?, updated_at = ? WHERE bitstamp_order_id = ?",
            (str(event), json.dumps(payload), captured_at, str(order_id)),
        )
        conn.commit()