import re
from typing import Any


def msg_is_price_inquiry(msg: str) -> bool:
    if not msg:
        return False
    patterns = ("多少钱", "多少一张", "一张多少钱", "画图多少", "报价", "给个价", "几块", "多少钱")
    return any(p in msg for p in patterns)


def detect_order_status(msg: str) -> str:
    if not msg:
        return ""
    s = msg
    if "买家已付款" in s or "已付款" in s:
        return "paid"
    if "[系统订单信息]" in s:
        if "等待买家付款" in s or "未付款" in s:
            return "waiting"
        return "order"
    return ""


def msg_requests_external_contact(msg: str) -> bool:
    if not msg:
        return False
    lower = msg.lower()
    kws = ("加qq", "qq号", "vx", "微信", "加v", "联系方式", "私聊", "加一下", "加个", "手机号", "电话", "加群", "q q", "v 信")
    return any(k in lower for k in kws)


def extract_size_pairs_m(msg: str) -> list[tuple[float, float]]:
    """提取消息中的米制尺寸对，如 15*6.4米 / 15米*6.4 / 15x6.4m。"""
    if not msg:
        return []
    s = (msg or "").lower().replace("×", "*").replace("x", "*")
    pairs = []
    patterns = [
        r"(\d+(?:\.\d+)?)\s*\*\s*(\d+(?:\.\d+)?)\s*(?:米|m)\b",
        r"(\d+(?:\.\d+)?)\s*(?:米|m)\s*\*\s*(\d+(?:\.\d+)?)\b",
    ]
    for p in patterns:
        for m in re.findall(p, s):
            try:
                a = float(m[0])
                b = float(m[1])
                if a > 0 and b > 0:
                    pairs.append((a, b))
            except Exception:
                continue
    return pairs


def oversize_reply_if_needed(msg: str) -> str:
    """
    检测超大尺寸需求并返回拒绝话术；未命中返回空字符串。
    规则：最长边 > 阈值 或 面积 > 阈值。
    """
    try:
        from config.config import MAX_SERVICE_SIZE_LONGEST_METERS, MAX_SERVICE_SIZE_AREA_SQM

        longest_limit = float(MAX_SERVICE_SIZE_LONGEST_METERS)
        area_limit = float(MAX_SERVICE_SIZE_AREA_SQM)
    except Exception:
        longest_limit = 10.0
        area_limit = 20.0

    pairs = extract_size_pairs_m(msg)
    for w, h in pairs:
        longest = max(w, h)
        area = w * h
        if longest > longest_limit or area > area_limit:
            return (
                f"{w:g}米*{h:g}米这个尺寸太大了，我们这边做不了。"
                "如果要做可以拆成几段小尺寸，我再给你按段评估。"
            )
    return ""


def build_auto_quote_signature(state: Any) -> str:
    from core.websocket_auto_quote_flow import build_auto_quote_signature as _build

    return _build(state)