# -*- coding: utf-8 -*-
"""
研判闸客户端 · 二级关口 (设计 §7)
==================================
「PMS 备齐硬数字与账本流水作为 context → 请求决策系统研判 (其 process_intraday_audit
  新增 PMS 请求类 direction, 复用既有仲裁哲学: 代码算数、AI 裁定性、越界收口)
  → 结构化答复 通过/驳回+理由。**研判服务不可用 → 自动降级 propose_only
  (人工确认替位) + ERROR 告警**。命令驱动动作不过研判闸 (不用 AI 审用户)。」

当前状态: 决策系统侧的 PMS 请求 direction 尚未开发 (bionic 仓库的配套改造)。
因此本模块默认 `PMS_JUDGE_API_BASE` 为空 = 未接通, 一律返回 UNAVAILABLE, 调用方按设计
降级为「人工确认替位」。接通后只需在页面把 base 填上, 无需改代码。

返回结构固定: {"verdict": PASS|REJECT|UNAVAILABLE, "reason", "degraded", "raw"}
"""
from __future__ import annotations

import logging

from app.services import param_store

logger = logging.getLogger("pms.judge")

PASS, REJECT, UNAVAILABLE = "PASS", "REJECT", "UNAVAILABLE"


def enabled() -> bool:
    return param_store.get_bool("PMS_JUDGE_ENABLED", True)


def base_url() -> str:
    return (param_store.get("PMS_JUDGE_API_BASE", "") or "").strip().rstrip("/")


def available() -> bool:
    return bool(enabled() and base_url())


def judged_actions() -> set:
    return set(param_store.get_list("PMS_JUDGE_ACTIONS", ["FILL", "ADD", "DCA", "SWITCH"]))


def status() -> dict:
    if not enabled():
        return {"available": False, "reason": "研判闸已关闭 (PMS_JUDGE_ENABLED=False), "
                                              "自主提议一律走人工确认"}
    if not base_url():
        return {"available": False, "reason": "决策系统 PMS 研判接口未配置 "
                                              "(PMS_JUDGE_API_BASE 为空) —— 待 bionic 侧配套改造"
                                              "完成后填入, 当前自动降级为人工确认"}
    return {"available": True, "base": base_url(), "actions": sorted(judged_actions())}


def request(candidate: dict, context: dict = None, *, timeout: int = None) -> dict:
    """请求一次研判。任何异常/超时/未接通都返回 UNAVAILABLE (绝不把提议当成通过)。"""
    action = str(candidate.get("action") or "").upper()
    if action not in judged_actions():
        return {"verdict": PASS, "reason": f"{action} 不在研判范围, 规则闸通过即可",
                "degraded": False, "raw": None}
    if not available():
        st = status()
        logger.error("[研判闸] 不可用, 降级人工确认: %s", st["reason"])
        return {"verdict": UNAVAILABLE, "reason": st["reason"], "degraded": True, "raw": None}

    payload = {
        "direction": "PMS_JUDGE", "action": action, "ts_code": candidate.get("ts_code"),
        "qty": candidate.get("qty"), "reason": candidate.get("reason"),
        "hard_numbers": candidate.get("hard_numbers") or {},
        "context": context or {},
        # 设计要求: 补仓类研判必须回答「下跌是杀逻辑还是杀情绪」
        "must_answer": (["下跌是杀逻辑还是杀情绪"] if action == "DCA" else []),
    }
    to = int(timeout or param_store.get_int("PMS_JUDGE_TIMEOUT", 90))
    url = base_url() + (param_store.get("PMS_JUDGE_PATH", "/api/intraday/pms_judge") or "")
    try:
        import requests
        r = requests.post(url, json=payload, timeout=to)
        r.raise_for_status()
        data = r.json() or {}
    except Exception as e:
        logger.error("[研判闸] 请求失败, 降级人工确认: %s: %s", type(e).__name__, e)
        return {"verdict": UNAVAILABLE, "reason": f"研判请求失败: {type(e).__name__}: {e}",
                "degraded": True, "raw": None}

    verdict = str(data.get("verdict") or data.get("decision") or "").upper()
    if verdict in ("PASS", "APPROVE", "APPROVED", "ALLOW", "通过"):
        v = PASS
    elif verdict in ("REJECT", "DENY", "DENIED", "BLOCK", "驳回"):
        v = REJECT
    else:
        logger.error("[研判闸] 答复无法识别 (%s), 按不可用降级", verdict or data)
        return {"verdict": UNAVAILABLE, "reason": f"研判答复无法识别: {verdict or data}",
                "degraded": True, "raw": data}
    return {"verdict": v, "reason": data.get("reason") or data.get("rationale") or "",
            "degraded": False, "raw": data}