#!/usr/bin/env python3
"""门锚投影：机械验收子串必须对写手可见。"""

from __future__ import annotations

import importlib.util
import unittest
from pathlib import Path


def _load_production_entry():
    path = (
        Path(__file__).resolve().parents[3]
        / ".agent" / "skills" / "write-next-chapter" / "scripts" / "produce_next_chapter.py"
    )
    spec = importlib.util.spec_from_file_location("produce_next_chapter", path)
    mod = importlib.util.module_from_spec(spec)
    assert spec.loader is not None
    # 只测纯函数：直接 exec 会拉全依赖；改为复制最小导入路径
    # 实际加载模块（依赖 muse_db 等，本仓 .venv 可用）
    spec.loader.exec_module(mod)
    return mod


class GateConstraintProjectionTests(unittest.TestCase):
    @classmethod
    def setUpClass(cls) -> None:
        cls.entry = _load_production_entry()

    def test_ch3_upgrade_anchors_surfaced(self) -> None:
        lines = self.entry.format_mechanical_gate_constraints(self.entry.GATE_ANCHORS[3])
        blob = "\n".join(lines)
        self.assertIn("event-3-upgrade", blob)
        self.assertIn("升级", blob)
        self.assertIn("变强", blob)
        self.assertIn("机械门验收", blob)

    def test_missing_event_group_still_lists_characters(self) -> None:
        lines = self.entry.format_mechanical_gate_constraints(
            {
                "requiredEvents": [],
                "requiredCharacters": ["林深"],
                "foreshadowingActions": [],
                "chapterEndHook": {
                    "requirementId": "hook-x",
                    "anchors": ["深渊"],
                    "maxDistanceFromEnd": 100,
                },
            }
        )
        blob = "\n".join(lines)
        self.assertIn("林深", blob)
        self.assertIn("深渊", blob)


if __name__ == "__main__":
    unittest.main()