# Copyright (c) 2025-2026 马建军. All rights reserved.
# 专有软件 — 未经授权禁止复制、传播、转售。
# 详见 LICENSE.zh-CN.txt 与 docs/软件购买与使用协议.md

"""Local HTTP client for the isolated CTP worker process."""
from __future__ import annotations

import json
import os
import time
import urllib.error
import urllib.request
from typing import Any, Optional


DEFAULT_BASE_URL = "http://127.0.0.1:6601"
DEFAULT_TIMEOUT_SEC = 2.5
STATUS_TIMEOUT_SEC = 5.0
MUTATION_TIMEOUT_SEC = 8.0


class CtpWorkerUnavailable(RuntimeError):
    """Raised when the local CTP worker cannot be reached."""


def ctp_role() -> str:
    return (os.getenv("QIHUO_CTP_ROLE", "client") or "client").strip().lower()


def is_worker_role() -> bool:
    return ctp_role() == "worker"


def worker_base_url() -> str:
    return (os.getenv("QIHUO_CTP_WORKER_URL", DEFAULT_BASE_URL) or DEFAULT_BASE_URL).rstrip("/")


def worker_token() -> str:
    token = (os.getenv("QIHUO_CTP_WORKER_TOKEN", "") or "").strip()
    if token:
        return token
    # Localhost-only default keeps old deployments working; PM2 sets a shared token.
    return "qihuo-local-ctp"


def _request(
    method: str,
    path: str,
    payload: Optional[dict[str, Any]] = None,
    *,
    timeout: float = DEFAULT_TIMEOUT_SEC,
) -> dict[str, Any]:
    url = f"{worker_base_url()}{path}"
    body = None
    headers = {
        "Accept": "application/json",
        "X-Qihuo-CTP-Token": worker_token(),
    }
    if payload is not None:
        body = json.dumps(payload, ensure_ascii=False).encode("utf-8")
        headers["Content-Type"] = "application/json"
    req = urllib.request.Request(url, data=body, headers=headers, method=method.upper())
    try:
        with urllib.request.urlopen(req, timeout=timeout) as resp:
            raw = resp.read().decode("utf-8", errors="replace")
    except (urllib.error.URLError, TimeoutError, OSError) as exc:
        raise CtpWorkerUnavailable(f"CTP worker unavailable: {exc}") from exc
    if not raw:
        return {}
    try:
        data = json.loads(raw)
    except json.JSONDecodeError as exc:
        raise CtpWorkerUnavailable(f"CTP worker returned invalid JSON: {raw[:120]}") from exc
    if not isinstance(data, dict):
        raise CtpWorkerUnavailable("CTP worker returned non-object JSON")
    if data.get("ok") is False:
        raise RuntimeError(str(data.get("error") or "CTP worker request failed"))
    return data


def get(path: str, *, timeout: float = DEFAULT_TIMEOUT_SEC) -> dict[str, Any]:
    return _request("GET", path, timeout=timeout)


def post(
    path: str,
    payload: Optional[dict[str, Any]] = None,
    *,
    timeout: float = DEFAULT_TIMEOUT_SEC,
) -> dict[str, Any]:
    return _request("POST", path, payload or {}, timeout=timeout)


def health() -> dict[str, Any]:
    try:
        return get("/health", timeout=1.0)
    except Exception as exc:
        return {
            "ok": False,
            "worker_online": False,
            "error": str(exc),
            "ts": time.time(),
        }


def status(mode: str) -> dict[str, Any]:
    try:
        data = get(f"/ctp/status?mode={mode}", timeout=STATUS_TIMEOUT_SEC)
        return dict(data.get("status") or {})
    except Exception as exc:
        return {
            "connected": False,
            "connecting": False,
            "worker_online": False,
            "last_error": f"CTP worker 离线或重启中：{exc}",
        }


def connect(mode: str, *, force: bool = False) -> dict[str, Any]:
    data = post(
        "/ctp/connect",
        {"mode": mode, "force": bool(force)},
        timeout=MUTATION_TIMEOUT_SEC,
    )
    return dict(data.get("status") or data)


def start_connect(mode: str, *, force: bool = False, scheduled: bool = False) -> dict[str, Any]:
    return post(
        "/ctp/start_connect",
        {"mode": mode, "force": bool(force), "scheduled": bool(scheduled)},
        timeout=MUTATION_TIMEOUT_SEC,
    )


def disconnect(*, set_disabled_hint: bool = False) -> None:
    post(
        "/ctp/disconnect",
        {"set_disabled_hint": bool(set_disabled_hint)},
        timeout=MUTATION_TIMEOUT_SEC,
    )


def account(mode: str) -> dict[str, Any]:
    data = get(f"/ctp/account?mode={mode}")
    return dict(data.get("account") or {})


def positions(
    mode: str,
    *,
    refresh_if_empty: bool = True,
    refresh_margin: bool = False,
) -> list[dict[str, Any]]:
    data = post(
        "/ctp/positions",
        {
            "mode": mode,
            "refresh_if_empty": bool(refresh_if_empty),
            "refresh_margin": bool(refresh_margin),
        },
    )
    return list(data.get("positions") or [])


def trades(mode: str, *, refresh: bool = False) -> list[dict[str, Any]]:
    data = post("/ctp/trades", {"mode": mode, "refresh": bool(refresh)})
    return list(data.get("trades") or [])


def active_orders(mode: str) -> list[dict[str, Any]]:
    data = get(f"/ctp/active_orders?mode={mode}")
    return list(data.get("orders") or [])


def tick_price(mode: str, symbol: str) -> Optional[float]:
    data = post("/ctp/tick_price", {"mode": mode, "symbol": symbol})
    value = data.get("price")
    return float(value) if value not in (None, "") else None


def tick_detail(mode: str, symbol: str) -> dict[str, Any]:
    data = post("/ctp/tick_detail", {"mode": mode, "symbol": symbol})
    return dict(data.get("detail") or {})


def estimate_margin_one_lot(
    mode: str,
    symbol: str,
    price: float,
    *,
    direction: str = "long",
) -> Optional[float]:
    data = post(
        "/ctp/estimate_margin_one_lot",
        {"mode": mode, "symbol": symbol, "price": price, "direction": direction},
    )
    value = data.get("margin")
    return float(value) if value not in (None, "") else None


def contract_spec(mode: str, symbol: str) -> Optional[dict[str, Any]]:
    data = post("/ctp/contract_spec", {"mode": mode, "symbol": symbol})
    spec = data.get("spec")
    return dict(spec) if isinstance(spec, dict) else None


def send_order(payload: dict[str, Any]) -> dict[str, Any]:
    return post("/ctp/order", payload, timeout=MUTATION_TIMEOUT_SEC)


def cancel_order(mode: str, vt_orderid: str) -> bool:
    data = post(
        "/ctp/cancel",
        {"mode": mode, "vt_orderid": vt_orderid},
        timeout=MUTATION_TIMEOUT_SEC,
    )
    return bool(data.get("cancelled"))


def bridge_action(action: str, payload: Optional[dict[str, Any]] = None) -> dict[str, Any]:
    return post(
        f"/ctp/bridge/{action}",
        payload or {},
        timeout=MUTATION_TIMEOUT_SEC,
    )