# -*- coding: utf-8 -*-
"""380-3 노선이 바뀌어 좌표로 따라간 사토장 · 토취장(site) = 새 노선 일반 측점 중 가장 가까운 곳.

요구 241-8 「기존에 있던 측점들을 기준으로」 — 따라간 뒤에도 기존 측점에 섬(CAD 글 ±0.51 m).
그 밖 꼴은 종전대로 정수 m. 짝 = 파이썬 `follow_structures` · `snap_existing_station` ·
`general_stations` ↔ TS `followStructures(…, intervalM)` · `snapExistingStation` · `gridStations`
(`helper_380_3_site_follow.cjs`).
"""

from __future__ import annotations

import json
import subprocess
import sys
from pathlib import Path
from types import SimpleNamespace

import pytest

HERE = Path(__file__).resolve().parent
ROOT = HERE.parents[1]
if str(ROOT) not in sys.path:
    sys.path.insert(0, str(ROOT))

from common_util.common_util_route_follow import follow_structures  # noqa: E402
from common_util.common_util_structure_station import (  # noqa: E402
    general_stations,
    snap_existing_station,
)
from config.config_system_design import SECTION_STATION_INTERVAL_M  # noqa: E402

# 새 노선 = 길이 130.0 m(50 + 50 + 30) — 일반 측점 0 · 20 · … · 120 · 130
LINE = [(0.0, 0.0), (50.0, 0.0), (50.0, 50.0), (80.0, 50.0)]
ITEMS = [
    {"placement": "site", "chainage_m": 33.0, "x": 33.0, "y": 1.0},  # 투영 33 → 40
    {"placement": "site", "chainage_m": 75.0, "x": 51.0, "y": 25.0},  # 투영 75 → 80(가까운 쪽)
    {"placement": "site", "chainage_m": 10.0, "x": 10.0, "y": -2.0},  # 가운데 10 → 앞 측점 0
    {"placement": "site", "chainage_m": 127.0, "x": 78.0, "y": 50.0},  # 투영 128 → 끝 130
    {"placement": "point", "chainage_m": 33.0, "x": 33.0, "y": 1.0},  # site 아님 = 정수 m 33
    {"placement": "site", "chainage_m": 40.0},  # 좌표 없음 — 그대로
]
WANT = [40.0, 80.0, 0.0, 130.0, 33.0, 40.0]
GRIDS = [(130.0, 20.0), (120.0, 20.0), (0.0, 20.0), (5.5, 2.0)]
SNAPS = [(25.0, [0.0, 20.0, 40.0]), (30.0, [0.0, 20.0, 40.0]), (7.0, [0.0, 10.0])]

pytestmark = pytest.mark.skipif(
    not (ROOT / "config" / "node_modules" / "typescript").is_dir(),
    reason="프론트엔드 의존성 미설치",
)


@pytest.fixture(scope="module")
def ts(tmp_path_factory) -> dict:
    source = tmp_path_factory.mktemp("s3803") / "in.json"
    source.write_text(
        json.dumps(
            {
                "grids": GRIDS,
                "snaps": SNAPS,
                "items": ITEMS,
                "line": [{"x": x, "y": y} for x, y in LINE],
                "interval": SECTION_STATION_INTERVAL_M,
            }
        ),
        encoding="utf-8",
    )
    proc = subprocess.run(  # noqa: S603 — 고정 실행 파일
        ["node", str(HERE / "helper_380_3_site_follow.cjs"), str(source)],
        capture_output=True,
        text=True,
        encoding="utf-8",
        cwd=str(ROOT),
        check=False,
    )
    assert proc.returncode == 0, proc.stderr
    return json.loads(proc.stdout)


def _python_follow() -> list[float]:
    items = [
        SimpleNamespace(**{"x": None, "y": None, "start_m": None, "end_m": None, **item})
        for item in ITEMS
    ]
    follow_structures(items, LINE)
    return [item.chainage_m for item in items]


def test_따라간_site_는_새_노선_일반_측점() -> None:
    assert SECTION_STATION_INTERVAL_M == 20.0
    assert _python_follow() == WANT


def test_거울_파이썬_TS(ts) -> None:
    assert ts["follow"] == _python_follow()
    assert ts["grid"] == [general_stations(total, interval) for total, interval in GRIDS]
    assert ts["snap"] == [snap_existing_station(value, stations) for value, stations in SNAPS]
    assert ts["snap"] == [20.0, 20.0, 10.0]  # 가운데면 앞 측점


def test_간격_안_주면_종전_정수_m(ts) -> None:
    assert ts["plain"] == [33.0, 75.0, 10.0, 128.0, 33.0, 40.0]