import json
import random
import re


def to_chinese_text(text):
    """处理文本，安全地转换 unicode 转义。"""
    if not isinstance(text, str):
        return text
    if "\\u" not in text:
        return text
    try:
        return json.loads(f'"{text}"')
    except Exception:
        return text


def is_transfer_msg(client, data: dict) -> bool:
    msg = to_chinese_text(data.get("msg", ""))
    return "转交给" in msg or "转接给" in msg


def pick_transfer_greeting() -> str:
    choices = [
        "在的亲，发图我看下",
        "在呢亲，有需求直接说",
        "我在的，您把要求发我",
        "在的哈，你说我这边看着处理",
        "在呢，图和需求发来我看看",
    ]
    return random.choice(choices)


def is_shop_card(client, data: dict) -> bool:
    msg = to_chinese_text(data.get("msg", ""))
    return msg.startswith("[进店卡片]") or "我想咨询你们店的这个商品" in msg


def extract_customer_text_from_shop_card_msg(client, msg: str) -> str:
    text = to_chinese_text(msg or "").strip()
    if not text:
        return ""
    parts = [p.strip() for p in text.split("#*#") if p and p.strip()]
    kept = []
    for part in parts:
        if part.startswith("[进店卡片]") or "我想咨询你们店的这个商品" in part:
            continue
        kept.append(part)
    if kept:
        return " ".join(kept).strip()
    stripped = re.sub(r"\[进店卡片\][^\n\r]*", "", text).strip()
    stripped = stripped.replace("我想咨询你们店的这个商品", "").strip("，。,#* ")
    return stripped


def has_chat_history(customer_id: str, acc_id: str = "") -> bool:
    if not customer_id:
        return False
    try:
        from db.chat_log_db import get_recent_conversation

        msgs = get_recent_conversation(customer_id, acc_id=acc_id, limit=1)
        return len(msgs) > 0
    except Exception:
        return False


def should_ignore(client, data: dict) -> bool:
    msg = to_chinese_text(data.get("msg", ""))

    ignore_patterns = [
        "已转接",
        "接入会话",
        "结束会话",
        "会话已",
        "[系统消息]",
        "[系统通知]",
    ]
    for pattern in ignore_patterns:
        if pattern in msg:
            return True

    acc_id = data.get("acc_id", "")
    from_id = data.get("from_id", "")
    if acc_id and from_id and acc_id == from_id:
        return True

    return False


def get_msg_type_name(msg_type):
    types = {
        0: "文本",
        1: "图片",
        2: "视频",
        3: "文件",
    }
    return types.get(msg_type, f"未知({msg_type})")