"""
意图：普通文字询价（空运 / 海运闭环）。

本文件职责：入站文字 → 流程编排；回复只写入 outbox。
禁止：在本文件抽字段语义（交给 extract）；禁止直连 TMS；禁止回调线程外的额外阻塞。
"""

from __future__ import annotations

import logging
from typing import Any, Optional

from agent.channel.queue import get_message_store
from agent.channel.wecom.models import InboundMessage
from agent.config import get_settings
from agent.llm.extract_text import detect_transport_mode
from agent.policy.air_text_flow import get_air_text_flow
from agent.policy.land_text_flow import get_land_text_flow
from agent.policy.sea_text_flow import get_sea_text_flow

logger = logging.getLogger(__name__)


def _front_bookmark(sess) -> bool:
    """补问/核对手稿优先于已出票旧书签。空的 need_mode 不算（那是丢会话后的误伤）。"""
    if sess is None:
        return False
    phase = (sess.phase or "").strip()
    line = (sess.business_line or "").upper()
    if phase == "need_mode" and not line:
        return False
    return phase in {"clarify", "need_mode", "need_land_options", "wait_confirm"}


def _pick_text_flow(*, sender_id: str, text: str, injected_mode: str = ""):
    """
    按当前书签或本句运输方式选空运/海运/陆运流程。

    陆运核对卡上的确定优先于旧海运书签，避免「确定」被海运/空运吃掉。
    图片识图在 Worker 写下的补问书签，HTTP 必须从 Redis 读到，否则「托盘」会变成再问运输方式。
    """
    from agent.schema.land_options import looks_like_confirm

    land = get_land_text_flow()
    if looks_like_confirm(text):
        restored = land.restore_confirm_session(sender_id)
        if restored:
            return land
        retry = land.restore_tms_retry_session(sender_id)
        if retry:
            return land
    sea = get_sea_text_flow()
    air = get_air_text_flow()
    sea_sess = sea.session_of(sender_id)
    land_sess = land.session_of(sender_id)
    air_sess = air.session_of(sender_id)
    for sess, flow in ((land_sess, land), (air_sess, air), (sea_sess, sea)):
        if _front_bookmark(sess):
            return flow
    if sea_sess and (sea_sess.business_line or "").upper() == "SEA":
        return sea
    if land_sess and (land_sess.business_line or "").upper() == "LAND":
        return land
    mode = (injected_mode or detect_transport_mode(text) or "").upper()
    if mode == "SEA":
        return sea
    if mode == "LAND":
        return land
    return air


def is_pending_land_confirm(message: InboundMessage) -> bool:
    """
    陆运核对卡已出、本句是确定查价。

    测服实测「确定」两字会被 DeepSeek A 判成闲聊，必须在分发层拦住，
    不能回首次问候、不能跳过建单。
    """
    if not message.has_sender():
        return False
    from agent.schema.land_options import looks_like_confirm

    if not looks_like_confirm(message.content or ""):
        return False
    sess = get_land_text_flow().restore_confirm_session(message.sender_id)
    ok = bool(
        sess
        and (sess.business_line or "").upper() == "LAND"
        and sess.phase == "wait_confirm"
    )
    if not ok:
        logger.info(
            "land.confirm miss sender=%s phase=%s line=%s",
            message.sender_id,
            getattr(sess, "phase", "-"),
            getattr(sess, "business_line", "-"),
        )
    return ok


def is_pending_land_tms_retry(message: InboundMessage) -> bool:
    """
    陆运工单已建、上次查价失败，本句是确定重查。

    不能回首次问候、不能再开一张新工单。
    """
    if not message.has_sender():
        return False
    from agent.schema.land_options import looks_like_confirm

    if not looks_like_confirm(message.content or ""):
        return False
    sess = get_land_text_flow().restore_tms_retry_session(message.sender_id)
    return bool(
        sess
        and (sess.business_line or "").upper() == "LAND"
        and sess.phase == "tms_tech"
        and (sess.work_order_no or "").strip()
    )


def is_land_confirm_action(message: InboundMessage) -> bool:
    """核对卡确定建单，或查价失败后确定重查。"""
    return is_pending_land_confirm(message) or is_pending_land_tms_retry(message)


def handle_text_inquiry(
    message: InboundMessage,
    *,
    injected_facts: Optional[dict[str, Any]] = None,
    injected_mode: str = "",
    b_result: Optional[dict[str, Any]] = None,
    chat_fn=None,
    flow=None,
    store=None,
) -> str:
    """
    处理一条私聊文字询价。

    须已有 sender_id。副作用：outbox 多条回复；主账经 flow.ledger。
    返回：流程阶段名。
    """
    if not message.has_sender():
        logger.warning("text_inquiry 拒绝：无 sender_id")
        return "reject_no_sender"
    from agent.handlers.image_inquiry import note_private_text

    note_private_text(message.sender_id, message.content or "")
    settings = get_settings()
    msg_store = store or get_message_store()
    engine = flow or _pick_text_flow(
        sender_id=message.sender_id,
        text=message.content or "",
        injected_mode=injected_mode,
    )
    replies: list[str] = []

    def reply(text: str, extra: dict | None = None) -> str:
        # 销售询价正文不加 [test]；[test] 只给运维告警
        body = text
        replies.append(body)
        ok, info = msg_store.enqueue_outbound(
            touser=message.sender_id,
            content=body,
            dedupe_key=f"inq:{message.message_id}:{len(replies)}",
            payload=dict(extra or {}),
        )
        logger.info("text_inquiry 出站 ok=%s info=%s phase_reply=%s", ok, info, body[:80])
        return info if ok else ""

    phase = engine.on_text(
        sender_id=message.sender_id,
        text=message.content or "",
        reply=reply,
        injected_facts=injected_facts,
        injected_mode=injected_mode,
        b_result=b_result,
        allow_b=bool(settings.llm_allow_network and settings.llm_data_usage_confirmed),
        chat_fn=chat_fn,
        inbound_raw=message.raw,
    )
    logger.info("text_inquiry phase=%s sender=%s", phase, message.sender_id)
    return phase


def handle_text_other(message: InboundMessage, *, store=None) -> str:
    """
    闲聊/其它：若有待点按钮则当按钮；否则回首次单聊话术。
    """
    from agent.policy import inquiry_copy as copy

    if not message.has_sender():
        return "reject_no_sender"
    msg_store = store or get_message_store()
    engine = _pick_text_flow(
        sender_id=message.sender_id, text=message.content or ""
    )
    sess = engine.session_for_action(
        message.sender_id, message.raw, text=message.content or ""
    )
    if sess and sess.phase == "wait_lost_reason":
        return handle_text_inquiry(message, store=msg_store)
    btn = engine.match_button(message.content or "", sess)
    if btn:
        return handle_text_inquiry(message, store=msg_store)
    if is_land_confirm_action(message):
        logger.info("text_other 陆运确定/重查，改走询价流程 sender=%s", message.sender_id)
        return handle_text_inquiry(message, store=msg_store)

    from agent.schema.land_options import looks_like_confirm

    if looks_like_confirm(message.content or ""):
        body = copy.LAND_CONFIRM_EXPIRED
        msg_store.enqueue_outbound(
            touser=message.sender_id,
            content=body,
            dedupe_key=f"land-confirm-expired:{message.message_id}",
        )
        return "land_confirm_expired"

    body = copy.FIRST_CHAT
    msg_store.enqueue_outbound(
        touser=message.sender_id,
        content=body,
        dedupe_key=f"other:{message.message_id}",
    )
    return "text_other"