"""Builder 个人总结再生入口：finish 按钮与对话指令统一走"显式请求即重生成"。

agent 侧只在总结缺失或 stale 时才生成（避免自动覆盖用户手工文本）；用户的显式
请求必须先把现有总结标记为 stale，让既有闸门放行。对话路径无法直接写简历
（add_message 不合并 resume_content），所以走"生成候选 → ChoiceChips 确认 →
组件事件写入"的既有 Builder 模式。
"""

from __future__ import annotations

import re
from typing import Any

from ..fsm import FSMError, Transition, assistant_turn, component
from ..models import ComposerMode, Stage
from ..resume_document import mark_profile_summary_stale, set_generated_profile_summary
from .constants import u
from .state import _set_stream_phases, ensure_builder_state

SUMMARY_APPLY_MODULE = "builder_summary_apply"
_REGEN_VERB = re.compile(r"(重新|再次|再来|重写|更新|刷新|换|再).{0,6}总结")
_ASK_GENERATE = re.compile(r"(?:帮我|请|我要|我想|给我).{0,6}生成.{0,4}总结|^生成.{0,4}总结")


def requests_summary_regen(content: str) -> bool:
    """"重新生成个人总结"类指令；提供总结原文或陈述事实的消息不算。"""
    normalized = re.sub(r"[\s,，。；;！!？?]", "", content.casefold())
    if "总结" not in normalized or "总结是" in normalized:
        return False
    return bool(_REGEN_VERB.search(normalized) or _ASK_GENERATE.search(normalized))


def finish_transition(profile: dict[str, Any], resume_content: dict[str, Any]) -> Transition:
    """"完成并生成个人总结"：已有总结也强制重生成（先标记 stale 放行闸门）。"""
    _set_stream_phases(profile, "saving")
    return Transition(
        Stage.BUILDER_CONVERSATION,
        profile,
        assistant_turn(
            u("好的，已根据当前简历预览信息生成个人总结，内容仍可在右侧预览中编辑。"),
            [],
            mode=ComposerMode.CHAT,
        ),
        resume_content=mark_profile_summary_stale(resume_content),
        generate_profile_summary=True,
    )


def summary_regen_turn(agent: Any, profile: dict[str, Any], resume_content: dict[str, Any]) -> Transition:
    """对话"重新生成个人总结"：立即生成候选文本，确认后经组件事件写入简历。"""
    try:
        proposal = agent.profile_summary_generator.generate(resume_content)
    except Exception:
        return Transition(
            Stage.BUILDER_CONVERSATION,
            profile,
            assistant_turn(u("个人总结生成失败，请稍后重试。"), [], mode=ComposerMode.CHAT),
        )
    ensure_builder_state(profile)["pending_summary_proposal"] = proposal
    card = component(
        "ChoiceChips",
        module=SUMMARY_APPLY_MODULE,
        options=[
            {"value": "apply", "label": u("写入简历")},
            {"value": "dismiss", "label": u("暂不写入")},
        ],
    )
    return Transition(
        Stage.BUILDER_CONVERSATION,
        profile,
        assistant_turn(u("好的，已根据当前简历内容重新生成个人总结：\n") + proposal, [card], mode=ComposerMode.CHAT),
    )


def apply_summary_proposal(
    profile: dict[str, Any], action: str, payload: dict[str, Any], resume_content: dict[str, Any]
) -> Transition:
    """确认卡事件：apply 写入候选总结（随组件事件合并进简历），否则丢弃。"""
    if action != "select":
        raise FSMError("invalid_builder_choice", "Choose whether to apply the summary", status_code=422)
    proposal = str(ensure_builder_state(profile).pop("pending_summary_proposal", "") or "").strip()
    if str(payload.get("value") or "") != "apply" or not proposal:
        return Transition(
            Stage.BUILDER_CONVERSATION,
            profile,
            assistant_turn(u("好的，保留当前个人总结。"), [], mode=ComposerMode.CHAT),
        )
    content = set_generated_profile_summary(mark_profile_summary_stale(resume_content), proposal, replace_stale=True)
    return Transition(
        Stage.BUILDER_CONVERSATION,
        profile,
        assistant_turn(u("已写入新的个人总结，仍可在右侧预览中编辑。"), [], mode=ComposerMode.CHAT),
        lifecycle="confirmed",
        resume_content=content,
    )