"""383-1 R = 일반측점 기본 제약 — 새 초기 노선 맞춤 + [측점 스냅] 켬 · 추천 후보 맞춤 · [적용] 켬.

    ./venv/Scripts/python.exe -m pytest resources/tester/test_383_1_route_station_default.py -q

새 사본(예상노선만) → 초기 노선 곡선 MC 가 일반측점 위(≈ 0 밖) · 곡선표 `station_snap` 켬 ·
추천 「예상노선 추적」(켬) 노드 = 초기 노선 노드 · 측점 밖 곡선 = 「못 지킨 구간」(station) ·
옛 사본(초기 노선 이미 있음)은 파일 · 깃발 그대로(말없이 측점 안 바뀜) · 추천 [적용] 은 스냅 켬.
첫 셈(검증_sub1 · 14 % · R12 · 묶음 + 영선) 74.6 s → 42.6 s(10-17 실측 · 같은 기계).
"""

import json
import shutil
from pathlib import Path

import pytest
from shapely.geometry import LineString, Point

from B05_Profile.B05_Profile_Engine_RouteInitial import generate_initial_route
from B05_Profile.B05_Profile_Engine_RouteInitial_Station import MC_TOL_M, STATION_M
from B05_Profile.B05_Profile_Engine_Sections import load_station_snap
from B05_Profile.B05_Profile_Router_Replan import (
    _curves_path,
    _ensure_planned_initial,
    _nodes_path,
    _write_planned_polyline,
)
from common_util.common_util_route_geometry import (
    expected_route_csv_path,
    planned_route_initial_path,
    read_planned_route_csv,
)

ROOT = Path(__file__).resolve().parents[2]
PROJECT = ROOT / "storage/1/3/7e420ed6-f940-4d12-a1a5-39cdcf70a391"  # 검증_sub1
RADIUS = 12.0


def _copy_expected(tmp_path: Path) -> Path:
    source = expected_route_csv_path(PROJECT)
    if not source.is_file():
        pytest.skip("검증_sub1 storage 없음")
    target = expected_route_csv_path(tmp_path)
    target.parent.mkdir(parents=True, exist_ok=True)
    shutil.copyfile(source, target)
    return tmp_path


def _off_station(path: Path) -> tuple[int, int]:
    """(측점 밖 곡선 수, 곡선 수) — 저장 파일에서 다시 잼(MC = BC · EC 누가거리 가운데)."""
    line = LineString([(v.x, v.y) for v in read_planned_route_csv(path).vertices])
    curves = json.loads(_curves_path(path).read_text(encoding="utf-8"))["curves"]
    taken, off = set(), 0
    for curve in curves:
        mc = (line.project(Point(curve["start"])) + line.project(Point(curve["end"]))) / 2
        n = round(mc / STATION_M)
        if n >= 1 and abs(mc - n * STATION_M) <= MC_TOL_M and n not in taken:
            taken.add(n)
        else:
            off += 1
    return off, len(curves)


def test_new_copy_initial_on_stations_and_flag_on(tmp_path: Path) -> None:
    root = _copy_expected(tmp_path)
    assert _ensure_planned_initial(root, RADIUS) is not None
    initial = planned_route_initial_path(root)
    off, total = _off_station(initial)
    print(f"새 초기 노선 곡선 {total} · 측점 밖 {off}")
    assert total and off <= 1
    assert load_station_snap(root) is True


def test_follow_nodes_equal_initial(tmp_path: Path) -> None:
    """추천 「예상노선 추적」(측점 맞춤 켬) = 새 초기 노선 · 측점 밖 곡선 수 = station 목록 수."""
    surface = PROJECT / "B05_Profile/route/cost_surface_classification_dtm_smooth.npz"
    if not surface.is_file():
        pytest.skip("검증_sub1 storage 없음")
    import test_351_2_curve_stations as t351

    root = _copy_expected(tmp_path)
    _ensure_planned_initial(root, RADIUS)
    terrain, streams = t351._project_terrain()
    expected = [(v.x, v.y) for v in read_planned_route_csv(expected_route_csv_path(root)).vertices]
    result = generate_initial_route(
        expected,
        terrain,
        streams,
        mode="follow",
        weights=None,
        max_grade=0.14,
        min_radius_m=RADIUS,
        with_profile=False,
    )
    saved = [
        (v.x, v.y)
        for v in read_planned_route_csv(_nodes_path(planned_route_initial_path(root))).vertices
    ]
    nodes = [(node["x"], node["y"]) for node in result["nodes"]]
    assert len(nodes) == len(saved)
    assert all(abs(a[0] - b[0]) <= 1e-3 and abs(a[1] - b[1]) <= 1e-3 for a, b in zip(nodes, saved))
    misses = [v for v in result["metrics"]["violations"] if v["kind"] == "station"]
    assert len(misses) == result["metrics"]["over_limit"]["station"] == result["off_station_curves"]
    assert result["unsnapped"] is not None  # 「측점 맞춤」 끔 = 맞추기 전 선


def test_old_copy_flag_and_line_unchanged(tmp_path: Path) -> None:
    """옛 사본 — 초기 노선(깃발 칸 없음)이 이미 있으면 다시 안 씀 · 스냅 끔 그대로."""
    root = _copy_expected(tmp_path)
    initial = planned_route_initial_path(root)
    points = [(v.x, v.y) for v in read_planned_route_csv(expected_route_csv_path(root)).vertices]
    _write_planned_polyline(initial, points, RADIUS)  # 옛 규칙(맞춤 없음 · 칸 없음)
    before = {p: p.read_bytes() for p in (initial, _curves_path(initial), _nodes_path(initial))}
    assert _ensure_planned_initial(root, RADIUS) is None
    assert {p: p.read_bytes() for p in before} == before
    assert load_station_snap(root) is False


def test_apply_saves_station_snap_on() -> None:
    text = (ROOT / "B05_Profile/B05_Profile_UI_RouteEdit_Apply.ts").read_text(encoding="utf-8")
    assert "routeDraftOf(nodes, { ...settings, stationSnap: true, stationSnapStep: null })" in text