"""host.py goal-resume 断点丢失守卫：state 里没有任务时拒绝不炸。

2026-10-29 长任务实弹：断点续跑在 state 里找不到任务时抛
KeyError traceback，worker 把无结论异常退出判成 interrupted，
自动恢复再排队、再 KeyError，12 秒一轮空转到 50 次上限。
守卫后：打印拒绝行、正常返回，state 文件不动、线程不恢复。
"""

import io
import json
import os
import sys
import tempfile
import unittest
from contextlib import redirect_stdout
from pathlib import Path
from unittest import mock

REPO_ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(REPO_ROOT))

import host


class FakeServer(object):
    def __init__(self):
        self.resumed = []

    def initialize(self):
        pass

    def close(self):
        pass

    def resume_thread(self, thread_id):
        self.resumed.append(thread_id)


class GoalResumeMissingTest(unittest.TestCase):
    def test_missing_task_refuses_without_traceback(self):
        with tempfile.TemporaryDirectory() as tmp:
            state_path = os.path.join(tmp, "host-state.json")
            cfg_path = os.path.join(tmp, "host-config.json")
            with open(state_path, "w", encoding="utf-8") as f:
                json.dump({"tasks": {"g": {"name": "g",
                                            "thread_id": "x",
                                            "status": "goal-running"}},
                           "automations": []}, f)
            with open(cfg_path, "w", encoding="utf-8") as f:
                json.dump({}, f)
            fake = FakeServer()
            argv = ["host.py", "--state", state_path,
                    "--config", cfg_path,
                    "goal-resume", "--task", "missing-task"]
            out = io.StringIO()
            with mock.patch.object(sys, "argv", argv):
                with mock.patch.object(host, "Server",
                                       lambda **kw: fake):
                    with redirect_stdout(out):
                        host.main()
            self.assertIn("goal-resume 拒绝", out.getvalue())
            self.assertIn("missing-task", out.getvalue())
            self.assertEqual(fake.resumed, [])
            with open(state_path, encoding="utf-8") as f:
                saved = json.load(f)
            self.assertEqual(list(saved["tasks"].keys()), ["g"])