#!/usr/bin/env python3
"""
branch_scanner.py — 分支自成长数据采集器（全静默）

核心功能（三件事，全部后台静默执行）：
1. 每轮扫描42只股票，评估当前情景下各分支的适用性
2. 适用分支 → trigger_count + 1，记录 last_triggered
3. 保存当前状态到 scanner_state.json 供下次对比

无输出 → 静默运行。触发数据积累在 decisions.json。
操作信号由 stale_push_wlin / price_monitor / 开盘收盘简报 另路输出。

数据流向（自成长）：每15分钟branch_scanner积累trigger_count →
  每日prune_branches评估低效分支 → decisions.json修剪 → 分支越来越有效
"""

import json, sys, re
from datetime import datetime
from urllib.request import Request, urlopen

DECISIONS_PATH = "/home/hmo/web-dashboard/data/decisions.json"
SCANNER_STATE = "/home/hmo/web-dashboard/data/scanner_state.json"


def get_price(code):
    mkt = "sh" if code.startswith("6") or code.startswith("5") else "sz"
    url = f"http://qt.gtimg.cn/q={mkt}{code}"
    req = Request(url, headers={"User-Agent": "Mozilla/5.0"})
    try:
        resp = urlopen(req, timeout=5).read().decode("gbk")
        parts = resp.split("~")
        if len(parts) > 3:
            return float(parts[3])
    except Exception:
        return None


def get_scenario():
    try:
        sys.path.insert(0, "/home/hmo/MoFin")
        from strategy_tree import detect_scenario
        return detect_scenario()
    except Exception:
        return {"id": "unknown", "label": "未知", "confidence": 0}


def check_condition(branch, scenario_id, price):
    cond = branch.get("condition", {})
    required_scenario = cond.get("scenario", "")
    if required_scenario and required_scenario != scenario_id:
        return False
    price_cond = cond.get("price", "")
    if price_cond and price:
        ops = re.findall(r"([<>=!]+)\s*([\d.]+)", price_cond)
        for op, val_str in ops:
            val = float(val_str)
            if op == "<" and not (price < val): return False
            if op == ">" and not (price > val): return False
            if op == "<=" and not (price <= val): return False
            if op == ">=" and not (price >= val): return False
    price_lower = cond.get("price_lower", "")
    if price_lower and price:
        ops = re.findall(r"([<>=!]+)\s*([\d.]+)", price_lower)
        for op, val_str in ops:
            val = float(val_str)
            if op == "<" and not (price < val): return False
            if op == ">" and not (price > val): return False
            if op == "<=" and not (price <= val): return False
            if op == ">=" and not (price >= val): return False
    return True


def main():
    now = datetime.now()
    if now.hour < 9 or now.hour > 16:
        return 0

    scenario = get_scenario()
    sid = scenario.get("id", "unknown")

    with open(DECISIONS_PATH) as f:
        data = json.load(f)
    decisions = data.get("decisions", [])

    for entry in decisions:
        code = entry.get("code", "")
        tree = entry.get("strategy_tree", {})
        branches = tree.get("branches", [])
        if not branches:
            continue
        price = get_price(code)
        if not price:
            continue
        for br in sorted(branches, key=lambda b: b.get("priority", 999)):
            if check_condition(br, sid, price):
                br["trigger_count"] = br.get("trigger_count", 0) + 1
                br["last_triggered"] = now.strftime("%Y-%m-%d")
                break

    with open(DECISIONS_PATH, "w") as f:
        json.dump(data, f, indent=2, ensure_ascii=False)

    # 更新状态快照
    state = {"scenario": sid, "updated_at": now.isoformat(), "branches": {}}
    for e in decisions:
        code = e.get("code", "")
        tree = e.get("strategy_tree", {})
        for br in sorted(tree.get("branches", []), key=lambda b: b.get("priority", 999)):
            if check_condition(br, sid, get_price(code)):
                state["branches"][code] = br.get("id", "")
                break
    try:
        with open(SCANNER_STATE, "w") as f:
            json.dump(state, f, indent=2)
    except Exception:
        pass

    return 0


if __name__ == "__main__":
    sys.exit(main())