# -*- coding: utf-8 -*-
"""344-2 실시간 바탕 짝 — 첫 계획선 · 관 자리 투영 · 구조물 좌표 따라감 · 노선 바뀜 때 계획고 옮김.

거울(파이썬 = 서버 정본 · TS = 브라우저 즉시 · 같은 값):
  ① 첫 계획선 base_pvi — `design_ground_following_profile` ↔ `logic/B05_Profile_Grade_Ground.ts`
     (1순위만 · 못 서는 땅이면 TS 는 null = 「서버로 다시 셈」).
  ② 관 자리 투영 — `common_util_drainage_pipes.project_pipe_points` ↔
     `common_util_route_follow.ts` `projectPipePoints`.
  ③ 구조물 따라감 — `common_util_route_follow.follow_structures` ↔ `followStructures`(20 m 상수 같음).
  ④ 계획고 옮김 — `B05_Profile_Engine_Grade_Carry` ↔ `logic/B05_Profile_Grade_Carry.ts`.
서버 쪽: 저장 때 좌표 채움(자리가 그대로면 옛 좌표 지킴) · 노선 [확인] 때 구조물 정본이 따라감.
"""

from __future__ import annotations

import json
import math
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))

import B05_Profile.B05_Profile_Structures_Router as structures_router  # noqa: E402
from B05_Profile.B05_Profile_Engine_Grade import resolve_grade_options  # noqa: E402
from B05_Profile.B05_Profile_Engine_Grade_Carry import (  # noqa: E402
    carry_profile_edits,
    changed_span,
)
from B05_Profile.B05_Profile_Engine_Grade_Profile import (  # noqa: E402
    design_ground_following_profile,
)
from common_util.common_util_drainage_pipes import PipePoint, project_pipe_points  # noqa: E402
from common_util.common_util_route_follow import (  # noqa: E402
    fill_structure_coordinates,
    follow_structures,
)
from common_util.common_util_route_geometry import RouteVertex  # noqa: E402
from config.config_system import STRUCTURE_ROUTE_DRIFT_MAX_M  # noqa: E402

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


# ── 입력 만들기 ───────────────────────────────────────────────────────────────


def _longitudinal(total: float, *, wave: float, holes: tuple[int, ...] = ()) -> dict:
    samples = []
    for index in range(int(total) + 1):
        s = float(min(index, total))
        z = 100.0 + 0.06 * s + 4.0 * math.sin(s / wave) + 1.5 * math.cos(s / 7.3)
        samples.append({"chainage_m": s, "elevation_m": z, "valid": index not in holes})
    if samples[-1]["chainage_m"] < total:
        samples.append({"chainage_m": total, "elevation_m": 100.0 + 0.06 * total, "valid": True})
    stations = [float(s) for s in range(0, int(total) + 1, 20)] + [47.3, 133.0, total]
    return {"samples": samples, "stations": [{"chainage_m": s} for s in sorted(set(stations))]}


def _ground_case(total: float, wave: float, stored: dict | None = None, paved=False) -> dict:
    longitudinal = _longitudinal(total, wave=wave, holes=(3, 4, 90))
    options = resolve_grade_options("trunk", terrain_type="normal", paved=paved, stored=stored)
    alignment, _ = design_ground_following_profile(longitudinal, options)
    return {
        "py": alignment["base_pvi"],
        "ts_input": {
            "samples": longitudinal["samples"],
            "stations": [row["chainage_m"] for row in longitudinal["stations"]],
            "policy": alignment["policy"],
            "startOffsetM": options.start_elevation_offset_m,
            "endOffsetM": options.end_elevation_offset_m,
        },
    }


GROUND_CASES = [
    _ground_case(200.0, 11.0),
    _ground_case(279.8, 23.0, {"start_elevation_offset_m": 0.4, "end_elevation_offset_m": -0.3}),
    _ground_case(160.4, 5.0, paved=True),
]
GROUND_FAIL = {
    "samples": [{"chainage_m": 0.0, "elevation_m": 100.0}, {"chainage_m": 50.0, "valid": False}],
    "stations": [0.0, 50.0],
    "policy": GROUND_CASES[0]["ts_input"]["policy"],
}

OLD_ROUTE = [(0.0, 0.0), (40.0, 5.0), (80.0, 0.0), (120.0, 10.0), (160.0, 5.0), (200.0, 0.0)]
L_OLD = round(sum(math.dist(a, b) for a, b in zip(OLD_ROUTE, OLD_ROUTE[1:])), 3)


def _carry_case(new_route: list[tuple[float, float]]) -> dict:
    total = sum(math.dist(a, b) for a, b in zip(new_route, new_route[1:]))
    longitudinal = _longitudinal(total, wave=13.0)
    options = resolve_grade_options("trunk", terrain_type="normal")
    alignment, _ = design_ground_following_profile(longitudinal, options)
    base_pvi = [
        {"chainage_m": s, "elevation_m": 200.0 + s / 10.0}
        for s in (0.0, 20.0, 40.0, 60.0, 90.5, 120.0, 150.0, 180.0, L_OLD)
    ]
    edits = {
        "station_offsets": {"20.000": 0.5, "90.500": -0.3, "180.000": 0.2, f"{L_OLD:.3f}": 0.1},
        "curve_radii": {"40.000": 300.0, "150.000": 250.0},
    }
    return {
        "old_xy": [{"x": x, "y": y} for x, y in OLD_ROUTE],
        "new_xy": [{"x": x, "y": y} for x, y in new_route],
        "base_pvi": base_pvi,
        "edits": edits,
        "ground_pvi": alignment["base_pvi"],
    }


CARRY_CASES = [
    # 가운데 노드(80, 0) 옮김 — 앞(0 ~ 40) 그대로 · 뒤(120 ~) 밂
    _carry_case(
        [(0.0, 0.0), (40.0, 5.0), (85.0, -12.0), (120.0, 10.0), (160.0, 5.0), (200.0, 0.0)]
    ),
    # 끝 노드 옮김(꼬리 없음)
    _carry_case([(0.0, 0.0), (40.0, 5.0), (80.0, 0.0), (120.0, 10.0), (160.0, 5.0), (215.0, 9.0)]),
    # 앞 노드 옮김(앞머리 없음) · 점 하나 더함
    _carry_case(
        [
            (-6.0, 4.0),
            (20.0, 6.0),
            (40.0, 5.0),
            (80.0, 0.0),
            (120.0, 10.0),
            (160.0, 5.0),
            (200.0, 0.0),
        ]
    ),
    # 같음
    _carry_case(OLD_ROUTE),
]

NEW_LINE = [(0.0, 0.0), (50.0, 0.0), (50.0, 50.0), (120.0, 60.0)]
PIPES = [
    {"chainage_m": 10.0, "x": 12.3, "y": 1.1, "start_m": 8.0, "end_m": 14.0},
    {"chainage_m": 70.0, "x": 48.0, "y": 25.0},
    {"chainage_m": 5.0},  # 좌표 없음 — 누가거리 그대로
    {"chainage_m": 90.0, "x": 55.0, "y": -5.0, "start_m": 88.0},  # 모서리 둘 사이
    {"chainage_m": 150.0, "x": 119.5, "y": 61.0, "end_m": 152.0},  # 끝 밖
]
STRUCTURES = [
    {"chainage_m": 20.0, "x": 30.0, "y": 2.0},
    {
        "chainage_m": 3.0,
        "start_m": 0.0,
        "end_m": 12.0,
        "x": 1.0,
        "y": 0.5,
    },  # 앞으로 밀면 0 에서 자름
    {"chainage_m": 100.0, "x": 80.0, "y": 90.0},  # 노선에서 멀어짐(>20 m)
    {"chainage_m": 40.0},  # 좌표 없음
]


@pytest.fixture(scope="module")
def ts(tmp_path_factory) -> dict:
    source = tmp_path_factory.mktemp("s344") / "in.json"
    source.write_text(
        json.dumps(
            {
                "ground": [case["ts_input"] for case in GROUND_CASES] + [GROUND_FAIL],
                "carry": CARRY_CASES,
                "pipes": [{"points": PIPES, "line": [{"x": x, "y": y} for x, y in NEW_LINE]}],
                "structures": [
                    {"items": STRUCTURES, "line": [{"x": x, "y": y} for x, y in NEW_LINE]}
                ],
            }
        ),
        encoding="utf-8",
    )
    proc = subprocess.run(  # noqa: S603 — 고정 실행 파일
        ["node", str(HERE / "helper_344_2_route_pairs.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 _close(a: float, b: float, tol: float = 1e-6) -> bool:
    return abs(float(a) - float(b)) <= tol


# ── ① 첫 계획선 ──────────────────────────────────────────────────────────────


@pytest.mark.parametrize("index", range(len(GROUND_CASES)))
def test_첫_계획선_거울(ts, index):
    py, got = GROUND_CASES[index]["py"], ts["ground"][index]
    assert len(got) == len(py)
    for a, b in zip(py, got):
        assert _close(a["chainage_m"], b["chainage_m"]) and _close(
            a["elevation_m"], b["elevation_m"]
        )


def test_첫_계획선은_측점에서_지반고(ts):
    case = GROUND_CASES[0]
    assert len(case["py"]) >= 13  # 모든 측점이 꼭짓점(호 보정으로 꼭짓점 표고는 지반에서 뜸)


def test_못_서는_땅은_서버로(ts):
    assert ts["ground"][-1] is None
    longitudinal = {"samples": GROUND_FAIL["samples"], "stations": []}
    with pytest.raises(ValueError):
        design_ground_following_profile(longitudinal, resolve_grade_options("trunk"))


# ── ② 관 자리 투영 ────────────────────────────────────────────────────────────


def _vertices(line):
    out, walked = [], 0.0
    for index, (x, y) in enumerate(line):
        if index:
            walked += math.dist(line[index - 1], (x, y))
        out.append(RouteVertex(x=x, y=y, z=0.0, chainage_m=walked))
    return out


def test_관_자리_투영_거울(ts):
    points = [
        PipePoint(
            chainage_m=p["chainage_m"],
            x=p.get("x"),
            y=p.get("y"),
            start_m=p.get("start_m"),
            end_m=p.get("end_m"),
        )
        for p in PIPES
    ]
    py = project_pipe_points(points, _vertices(NEW_LINE))
    got = ts["pipes"][0]
    assert [p.chainage_m for p in py] == [g["chainage_m"] for g in got]
    for p, g in zip(py, got):
        assert p.start_m == g.get("start_m") and p.end_m == g.get("end_m")
        assert (p.x, p.y) == (g.get("x"), g.get("y"))
    # (55, -5) 은 두 선분에서 같은 거리 — 앞 선분 끝(50) · 끝 밖은 연장 안 정수(170)
    assert [g["chainage_m"] for g in got] == [5.0, 12.0, 50.0, 75.0, 170.0]


# ── ③ 구조물 따라감 ───────────────────────────────────────────────────────────


def test_구조물_따라감_거울(ts):
    items = [SimpleNamespace(**{"start_m": None, "end_m": None, **s}) for s in STRUCTURES]
    for item in items:
        item.x, item.y = getattr(item, "x", None), getattr(item, "y", None)
    py = follow_structures(items, NEW_LINE)
    got = ts["structures"][0]
    for item, (drift, far), entry in zip(items, py, got):
        moved = entry["item"]
        assert item.chainage_m == moved["chainage_m"]
        assert item.start_m == moved.get("start_m") and item.end_m == moved.get("end_m")
        assert (drift is None) == (entry["drift_m"] is None)
        if drift is not None:
            assert _close(drift, entry["drift_m"], 1e-9)
        assert far == entry["far"]
    assert [entry["far"] for entry in got] == [False, False, True, False]
    assert got[1]["item"]["start_m"] == 0.0  # 앞으로 밀려도 0 에서 자름
    assert got[3]["item"]["chainage_m"] == 40.0  # 좌표 없는 옛 자료 그대로


def test_멀어짐_거리_상수_한_벌(ts):
    assert ts["driftMax"] == STRUCTURE_ROUTE_DRIFT_MAX_M == 20.0


def test_저장_때_좌표_채움_자리가_그대로면_옛_좌표():
    line = [(0.0, 0.0), (100.0, 0.0)]
    kept = SimpleNamespace(structure_id="a", chainage_m=30.0, start_m=None, end_m=None, x=31, y=9)
    moved = SimpleNamespace(structure_id="b", chainage_m=50.0, start_m=None, end_m=None, x=1, y=1)
    fresh = SimpleNamespace(
        structure_id=None, chainage_m=70.0, start_m=None, end_m=None, x=None, y=None
    )
    previous = {
        "a": SimpleNamespace(chainage_m=30.0, start_m=None, end_m=None, x=31, y=9),
        "b": SimpleNamespace(chainage_m=40.0, start_m=None, end_m=None, x=1, y=1),
    }
    fill_structure_coordinates([kept, moved, fresh], line, previous=previous)
    assert (kept.x, kept.y) == (31, 9)  # 따라간 땅 자리(노선 밖) 그대로
    assert (moved.x, moved.y) == (50.0, 0.0)  # 사용자가 옮김 → 노선 위 새 자리
    assert (fresh.x, fresh.y) == (70.0, 0.0)


def test_읽을_때는_없는_것만():
    line = [(0.0, 0.0), (100.0, 0.0)]
    old = SimpleNamespace(chainage_m=30.0, x=None, y=None)
    has = SimpleNamespace(chainage_m=60.0, x=5.0, y=5.0)
    assert fill_structure_coordinates([old, has], line, only_missing=True) == 1
    assert (old.x, old.y) == (30.0, 0.0) and (has.x, has.y) == (5.0, 5.0)


def test_노선_확인_때_구조물_정본이_따라감(tmp_path, monkeypatch):
    route = tmp_path / "route.geojson"
    route.write_text(
        json.dumps({"geometry": {"coordinates": [[0, 0, 0], [100, 0, 0]]}}), encoding="utf-8"
    )
    items = [
        SimpleNamespace(chainage_m=30.0, start_m=None, end_m=None, x=None, y=None),  # 옛 자료
        SimpleNamespace(chainage_m=60.0, start_m=55.0, end_m=65.0, x=60.0, y=0.0),
    ]
    saved: dict = {}
    monkeypatch.setattr(structures_router, "load_structures", lambda root: (4, items))
    monkeypatch.setattr(
        structures_router,
        "save_structures",
        lambda root, values, *, base_revision: saved.update(values=values, revision=base_revision),
    )
    # 새 노선 = 앞쪽 10 m 늘림(같은 땅 자리는 누가거리 +10)
    new_xy = [{"x": -10.0, "y": 0.0}, {"x": 100.0, "y": 0.0}]
    result = structures_router.follow_structures_to_route(tmp_path, "route.geojson", new_xy)
    assert result == {"moved": 2, "far": 0}
    assert saved["revision"] == 4
    assert [(i.chainage_m, i.start_m, i.end_m) for i in items] == [
        (40.0, None, None),
        (70.0, 65.0, 75.0),
    ]
    assert (items[0].x, items[0].y) == (30.0, 0.0)  # 옛 노선으로 채운 땅 자리


# ── ④ 계획고 옮김 ─────────────────────────────────────────────────────────────


def _py_carry(case):
    span = changed_span(
        [(p["x"], p["y"]) for p in case["old_xy"]], [(p["x"], p["y"]) for p in case["new_xy"]]
    )
    result = (
        carry_profile_edits(case["base_pvi"], case["edits"], span, case["ground_pvi"])
        if span
        else None
    )
    return span, result


@pytest.mark.parametrize("index", range(len(CARRY_CASES)))
def test_계획고_옮김_거울(ts, index):
    span, result = _py_carry(CARRY_CASES[index])
    got = ts["carry"][index]
    if span is None:
        assert got["span"] is None and got["result"] is None
        return
    for key, value in span.items():
        assert (
            (value == got["span"][key])
            if isinstance(value, bool)
            else _close(value, got["span"][key], 1e-9)
        )
    base_pvi, edits = result
    ts_result = got["result"]
    assert len(base_pvi) == len(ts_result["basePvi"])
    for a, b in zip(base_pvi, ts_result["basePvi"]):
        assert _close(a["chainage_m"], b["chainage_m"]) and _close(
            a["elevation_m"], b["elevation_m"]
        )
    assert edits == ts_result["edits"]


def test_가운데를_고치면_앞은_그대로_뒤는_밂():
    span, (base_pvi, edits) = _py_carry(CARRY_CASES[0])
    assert span["start_fixed"] and span["end_fixed"]
    delta = span["delta_m"]
    assert span["start_m"] == pytest.approx(math.dist(OLD_ROUTE[0], OLD_ROUTE[1]))
    # 앞 편집 그대로 · 안(90.5) 버림 · 뒤(180 · 207.6) 길이 차만큼
    assert edits["station_offsets"]["20.000"] == 0.5
    assert "90.500" not in edits["station_offsets"]
    assert edits["station_offsets"][f"{180.0 + delta:.3f}"] == 0.2
    assert edits["curve_radii"] == {"40.000": 300.0, f"{150.0 + delta:.3f}": 250.0}
    old = {round(p["chainage_m"], 3): p["elevation_m"] for p in CARRY_CASES[0]["base_pvi"]}
    got = {round(p["chainage_m"], 3): p["elevation_m"] for p in base_pvi}
    assert got[20.0] == old[20.0] and got[round(180.0 + delta, 3)] == old[180.0]
    # 바뀐 구간 안은 새 지반 첫 계획선 꼭짓점
    ground = {round(p["chainage_m"], 3): p["elevation_m"] for p in CARRY_CASES[0]["ground_pvi"]}
    inside = [s for s in got if span["start_m"] + 1e-6 < s < span["new_end_m"] - 1e-6]
    assert inside and all(got[s] == ground[s] for s in inside)
    assert min(got) == 0.0 and max(got) == pytest.approx(L_OLD + delta, abs=1e-3)


def test_끝을_고치면_끝_꼭짓점은_새_지반():
    span, (base_pvi, edits) = _py_carry(CARRY_CASES[1])
    assert not span["end_fixed"]
    assert f"{L_OLD:.3f}" not in edits["station_offsets"]  # 바뀐 끝 편집은 버림
    assert edits["station_offsets"]["90.500"] == -0.3  # 앞(바뀐 구간 앞) 편집 그대로
    ground_end = CARRY_CASES[1]["ground_pvi"][-1]
    assert base_pvi[-1] == {
        "chainage_m": round(ground_end["chainage_m"], 6),
        "elevation_m": ground_end["elevation_m"],
    }