"""사토장 — 횡단 단면 셈 지움 · 남은 사토 값 정리 (PLAN 380-1 · 요구 241-8).

⚠ 잠그는 것
  ① 사토장이 놓여도 [저장]·[확정] 서버 재계산(`enforce_design_lines` → `_enforce_stored_designs`)이
    사토 단면을 세우지 않는다 — 횡단도에 그림 없음 · 상세 CAD 글만.
  ② 옛 저장분에 남은 `spoil_fill_*` 값(노선 성토를 뺀 꼴)은 [저장] 한 번에 지워지고
    노선 성토(`fill_area_m2`)가 사토장 없는 값으로 돌아온다.
"""

from __future__ import annotations

import json
import sys
from pathlib import Path

import pytest

PROJECT_ROOT = Path(__file__).resolve().parents[2]
if str(PROJECT_ROOT) not in sys.path:
    sys.path.insert(0, str(PROJECT_ROOT))

from B06_Section.B06_Section_Engine_Design import compute_cross_design  # noqa: E402
from B06_Section.B06_Section_Router_Design import enforce_design_lines  # noqa: E402
from B06_Section.B06_Section_Server_Calc_Prebuild import _enforce_stored_designs  # noqa: E402


def _samples() -> list[dict]:
    """우측(-offset)이 높고 좌측(+offset)이 낮은 지반 — 좌가 성토 쪽."""
    return [
        {"offset_m": round(offset, 3), "elevation_m": round(100.0 - 0.5 * offset, 4), "valid": True}
        for offset in [x * 0.5 for x in range(-30, 31)]
    ]


def _plain() -> dict:
    return compute_cross_design(
        _samples(), 99.8, ground_type="soil", section_mode="right_cut", ditch_side="right"
    )


_LONGITUDINAL = {
    "design_profiles": [
        {"samples": [{"chainage_m": float(c), "elevation_m": 99.8} for c in range(0, 201, 20)]}
    ]
}


def _write_site(root: Path) -> None:
    (root / "B05_Profile" / "route").mkdir(parents=True, exist_ok=True)
    (root / "B05_Profile" / "route" / "structures.json").write_text(
        json.dumps(
            {
                "revision": 1,
                "structures": [
                    {
                        "structure_id": "sp-1",
                        "type_id": "spoil_bank",
                        "placement": "site",
                        "chainage_m": 120.0,
                        "options": {"capacity_m3": 400.0, "side": "좌"},
                    }
                ],
            },
            ensure_ascii=False,
        ),
        encoding="utf-8",
    )


def _leftover() -> dict:
    """옛 저장분 꼴 — 사토장 몫 1 ㎡ 를 노선 성토에서 뺀 채 `spoil_fill_*` 가 남음."""
    design = _plain()
    return {
        **design,
        "fill_area_m2": round(design["fill_area_m2"] - 1.0, 4),
        "spoil_fill_area_m2": 7.0,
        "spoil_fill_side": "left",
        "spoil_fill_width_m": 3.0,
        "spoil_fill_line": [{"offset_m": 3.0, "elevation_m": 99.0}],
        "spoil_fill_replaced_fill_m2": 1.0,
        "spoil_fill_capacity_m3": 400.0,
        "spoil_fill_structure_id": "sp-1",
    }


def test_설계_결과에_사토_칸_없음() -> None:
    assert not [key for key in _plain() if key.startswith("spoil_fill")]


def test_사토장이_놓여도_저장_재계산이_사토_단면을_안_세움(tmp_path: Path) -> None:
    _write_site(tmp_path)
    sections = [
        {"chainage_m": c, "samples": _samples(), "design": _plain()} for c in (100.0, 120.0, 140.0)
    ]
    enforce_design_lines(_LONGITUDINAL, sections, tmp_path)
    _enforce_stored_designs(_LONGITUDINAL, sections, tmp_path, None)
    for section in sections:
        assert not [key for key in section["design"] if key.startswith("spoil_fill")]


def test_옛_사토_값은_저장_한_번에_지워지고_성토_돌아옴(tmp_path: Path) -> None:
    _write_site(tmp_path)
    plain_fill = _plain()["fill_area_m2"]
    assert plain_fill > 1.0  # 성토가 실제로 서는 지반이라야 「돌아옴」이 뜻을 가짐
    sections = [{"chainage_m": 120.0, "samples": _samples(), "design": _leftover()}]
    assert enforce_design_lines(_LONGITUDINAL, sections, tmp_path) == 1
    design = sections[0]["design"]
    assert not [key for key in design if key.startswith("spoil_fill")]
    assert design["fill_area_m2"] == pytest.approx(plain_fill, abs=1e-6)