"""273-2 B06 횡단도 바로 반영 — 초안 자리 횡단 미리 뜨기(요구 168).

- 미리 뜨기(`sample_structure_sections`)는 파일을 안 쓰고, [저장] 때 정본 쓰기
  (`generate_irregular_sections`)와 같은 횡단을 낸다(같은 길 · 화면이 본 값 = 저장 값).
- 기본 설계(`compute_default_designs`)는 파일 대신 받은 횡단으로도 셈.
- 화면 쪽: 옛 자리 숨김 · 새 자리 얹음 · 이름 · 관 그림 · 늦게 끝난 옛 맞춤이 새 것을 안 덮음
  (`helper_273_2_preview_stations.cjs`).
"""

from __future__ import annotations

import json
import subprocess
from pathlib import Path

import numpy as np
import pytest

import B05_Profile.B05_Profile_Engine_Sections as sections
from B06_Section.B06_Section_Router_Design import compute_default_designs
from common_util.common_util_drainage_pipes import route_signature
from common_util.common_util_route_geometry import RouteVertex

HERE = Path(__file__).resolve().parent
ROOT = HERE.parents[1]
LINE = [[0.0, 0.0, 100.0], [350.0, 0.0, 100.0]]
ROUTE = "B05_Profile/route/route.geojson"


class _Slope:
    """옆으로 기운 지표 — 왼쪽이 높음(상단측 = left)."""

    def sample_xy(self, xy):
        points = np.asarray(xy, dtype=np.float64).reshape(-1, 2)
        return 100.0 + 0.2 * points[:, 1], np.ones(len(points), dtype=bool)


def _write(root: Path, rel: str, data) -> None:
    path = root / rel
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(json.dumps(data, ensure_ascii=False), encoding="utf-8")


def _project(root: Path) -> None:
    _write(root, ROUTE, {"geometry": {"type": "LineString", "coordinates": LINE}})
    vertices = [RouteVertex(x=p[0], y=p[1], z=p[2], chainage_m=0.0) for p in LINE]
    _write(
        root,
        "B04_PreProcess/drainage/edits/pipe_points.json",
        {"route_signature": route_signature(vertices), "points": []},
    )


def _files(root: Path) -> list[str]:
    return sorted(str(p.relative_to(root)) for p in root.rglob("*") if p.is_file())


def test_미리_뜨기는_안_쓰고_저장과_같은_횡단(tmp_path: Path, monkeypatch) -> None:
    _project(tmp_path)
    monkeypatch.setattr(sections, "build_surface_sampler", lambda *_a, **_k: _Slope())
    before = _files(tmp_path)
    stations, crosses = sections.sample_structure_sections(
        tmp_path, ROUTE, "csf", "tin", False, extra_stations=((130.0, ""),)
    )
    assert _files(tmp_path) == before  # 파일 · 폴더 하나도 안 생김
    assert [c["chainage_m"] for c in crosses] == [130.0] and len(stations) == 1
    sections.generate_irregular_sections(
        tmp_path, ROUTE, "csf", "tin", False, extra_stations=((130.0, "파형강관 D800"),)
    )
    written = json.loads(
        (tmp_path / "B06_Section/cross_sections/cross_00130m.json").read_text(encoding="utf-8")
    )
    assert written["samples"] == crosses[0]["samples"]
    assert written["frame"] == crosses[0]["frame"]


def test_기본_설계는_받은_횡단으로도_셈(tmp_path: Path) -> None:
    rel = "B06_Section/longitudinal/longitudinal.json"
    plan = [{"chainage_m": c, "elevation_m": 851.0} for c in (0.0, 1000.0)]
    _write(tmp_path, rel, {"stations": [], "design_profiles": [{"samples": plan}]})
    offsets = np.arange(-20.0, 20.5, 0.5)
    cross = {
        "chainage_m": 610.0,
        "uphill_side": "right",
        "samples": [
            {"offset_m": float(o), "elevation_m": 852.0 - 0.1 * float(o), "valid": True}
            for o in offsets
        ],
    }
    designs = compute_default_designs(tmp_path, rel, [610.0], crosses={610.0: cross})
    assert [chainage for chainage, _ in designs] == [610.0]
    design = designs[0][1]
    assert design["status"] == "provisional" and design.get("section_mode")
    # 파일에도 없고 받은 횡단에도 없는 자리는 건너뜀
    assert compute_default_designs(tmp_path, rel, [611.0], crosses={610.0: cross}) == []


@pytest.fixture(scope="module")
def ts() -> dict:
    if not (ROOT / "config" / "node_modules" / "typescript").is_dir():
        pytest.skip("프론트엔드 의존성 미설치")
    proc = subprocess.run(  # noqa: S603 — 고정 실행 파일
        ["node", str(HERE / "helper_273_2_preview_stations.cjs")],
        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 test_화면_옛_자리_숨기고_새_자리_얹음(ts) -> None:
    assert ts["moved"]["chainages"] == [0, 20, 40, 95, 100]  # 옛 95.38 숨김 · 새 95 미리 뜬 것
    assert ts["moved"]["asked"] == [[95]]
    card = ts["moved"]["preview"]
    assert card["preview"] is True and card["structure"] == "파형강관 D800"
    assert card["culvert"] is True  # 관 그림(세트)도 얹힘


def test_한_번_뜬_자리는_다시_안_물음(ts) -> None:
    assert ts["again"]["asked"] == []
    assert ts["again"]["chainages"] == [0, 20, 40, 95, 100]


def test_초안이_없으면_서버_목록_그대로(ts) -> None:
    assert ts["cleared"]["chainages"] == [0, 20, 40, 95.38, 100]


def test_늦게_끝난_옛_맞춤이_새_것을_안_덮음(ts) -> None:
    assert ts["race"]["chainages"] == [0, 20, 40, 100, 120]