"""PLAN 322-0 ② — 「기타」 유령 길 막기: 종류 이름을 바꾼 뒤에도 옛 이름 측점을 구조물로 되옮기지 않음.

정의 사본(임시 폴더 · 마스터 안 고침)에서 종류 이름을 바꾸고 앞 판을 `구조물정의_이력/판_N.json` 으로 둠 →
옛 이름 · 새 이름 측점 모두 이관 0건. 옛 꼴 자유 글(기성막이 · 대피로 폭 · 임의 이름)은 종전대로 옮김.
"""

from __future__ import annotations

import json
import shutil
from pathlib import Path

import pytest

from B05_Profile import B05_Profile_Structures_Schema as schema
from B05_Profile.B05_Profile_Structures_Migration import migrate_irregular_stations

MASTER = Path(schema.DEFINITION_PATH)
RENAMED = {
    "cross_drain_exposed": "노출수로",
    "box_culvert": "박스암거",
    "retaining_wall": "옹벽(신)",
}


@pytest.fixture()
def renamed(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> dict:
    old = json.loads(MASTER.read_text(encoding="utf-8"))
    history = tmp_path / schema.HISTORY_DIRNAME
    history.mkdir()
    shutil.copy(MASTER, history / f"판_{old['판']}.json")
    new = {**old, "판": old["판"] + 1}
    new["types"] = [{**t, "name": RENAMED.get(t["type_id"], t["name"])} for t in old["types"]]
    path = tmp_path / "구조물정의.json"
    path.write_text(json.dumps(new, ensure_ascii=False), encoding="utf-8")
    monkeypatch.setattr(schema, "DEFINITION_PATH", str(path))
    return old


def _moved(label: str) -> int:
    plan = migrate_irregular_stations([{"chainage_m": 120.0, "structure": label}])
    return len(plan.structures) + len(plan.pipe_facilities)


def test_old_and_new_names_are_not_migrated(renamed: dict) -> None:
    assert schema.structure_type_map()["box_culvert"].name == "박스암거"  # 사본을 읽음
    for type_id, name in RENAMED.items():
        old_name = next(t["name"] for t in renamed["types"] if t["type_id"] == type_id)
        assert _moved(old_name) == 0, old_name
        assert _moved(name) == 0, name


def test_every_type_name_of_any_version_is_blocked(renamed: dict) -> None:
    names = {t["name"] for t in renamed["types"]} | set(RENAMED.values())
    assert names <= schema.all_type_names()
    assert [name for name in sorted(names) if _moved(name)] == []


def test_legacy_free_text_still_migrates(renamed: dict) -> None:
    assert _moved("기성막이") == 1  # 옛 오기 → 기슭막이(관 지점)
    plan = migrate_irregular_stations([{"chainage_m": 300.0, "structure": "대피로 2.0m"}])
    assert [s.type_id for s in plan.structures] == ["refuge"]
    plan = migrate_irregular_stations([{"chainage_m": 15.0, "structure": "돌망태 보강"}])
    assert [(s.type_id, s.options["name"]) for s in plan.structures] == [("etc", "돌망태 보강")]


def test_master_history_names_are_read() -> None:
    """실제 마스터 이력(판_1 ~)의 이름도 모음 — 이력 파일은 읽기만."""
    history = MASTER.parent / schema.HISTORY_DIRNAME
    names = set()
    for path in history.glob("판_*.json"):
        names |= {t["name"] for t in json.loads(path.read_text(encoding="utf-8"))["types"]}
    assert names <= schema.all_type_names()