import re


def normalize_handle(handle: str) -> str:
    handle = handle.strip()
    if handle.startswith("bluebubbles:"):
        handle = handle[len("bluebubbles:") :]
    return handle


def extract_handle_from_chat_guid(chat_guid: str) -> str:
    parts = chat_guid.split(";")
    if len(parts) >= 3:
        return parts[2]
    return chat_guid


def is_dm_chat_guid(chat_guid: str) -> bool:
    return ";-;" in chat_guid


def is_group_chat_guid(chat_guid: str) -> bool:
    return ";+;" in chat_guid


def parse_target(raw: str) -> dict:
    if not raw:
        return {"type": "unknown", "value": "", "is_group": False}

    if raw.startswith("chat_guid:"):
        guid = raw[len("chat_guid:") :]
        is_group = is_group_chat_guid(guid)
        return {"type": "chat_guid", "value": guid, "is_group": is_group}

    if raw.startswith("chat_id:"):
        return {"type": "chat_id", "value": raw[len("chat_id:") :], "is_group": True}

    if raw.startswith("chat_identifier:"):
        return {"type": "chat_identifier", "value": raw[len("chat_identifier:") :], "is_group": True}

    if raw.startswith("group:"):
        return {"type": "group", "value": raw[len("group:") :], "is_group": True}

    return {"type": "handle", "value": normalize_handle(raw), "is_group": False}


def resolve_chat_guid_from_data(data: dict) -> str | None:
    for key in ("chatGuid", "chat_guid", "chat_id", "chatIdentifier"):
        if data.get(key):
            return data[key]
    return None


def normalize_phone_lookup_key(value: str) -> str | None:
    digits = re.sub(r"\D", "", value)
    if len(digits) == 11 and digits.startswith("1"):
        digits = digits[1:]
    return digits if len(digits) >= 7 else None