"""PLAN 561-1 — `.cpg` 없는 도엽 dbf = cp949 로 읽음 · 병합 열쇠에 파서 판 번호.

    ./venv/Scripts/python.exe -m pytest resources/tester/test_561_1_sheet_encoding.py -q

`.cpg` 없는 dbf 를 그냥 읽으면 latin-1 → 칸 이름 「등고수치」가 깨져 등고 높이가 빔
(D 프로젝트 4250c7bc 「등고 라인 94단을 격자에 굽어 0셀」).
"""

from __future__ import annotations

import sys
import zipfile
from pathlib import Path

import geopandas as gpd
from shapely.geometry import LineString

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

import B04_PreProcess.B04_PreProcess_Engine_SheetParser as parser  # noqa: E402

BASE = "N3L_F0010000"


def _sheet_zip(tmp_path: Path, with_cpg: bool) -> Path:
    """등고선 두 줄짜리 도엽 zip — dbf 는 cp949 · `.cpg` 는 고름."""
    shp_dir = tmp_path / ("cpg" if with_cpg else "nocpg")
    shp_dir.mkdir()
    gdf = gpd.GeoDataFrame(
        {"등고수치": [100.0, 105.0], "구분": ["주곡선", "주곡선"]},
        geometry=[LineString([(0, 0), (10, 0)]), LineString([(0, 5), (10, 5)])],
        crs="EPSG:5186",
    )
    gdf.to_file(shp_dir / f"{BASE}.shp", encoding="cp949")
    cpg = shp_dir / f"{BASE}.cpg"
    if with_cpg:
        cpg.write_text("CP949", encoding="ascii")
    else:
        cpg.unlink(missing_ok=True)
    zip_path = tmp_path / f"{shp_dir.name}.zip"
    with zipfile.ZipFile(zip_path, "w") as zf:
        for f in shp_dir.iterdir():
            zf.write(f, f.name)
    return zip_path


def _read(zip_path: Path) -> gpd.GeoDataFrame:
    gdf = parser._read_layer_from_zip(zip_path, "N3L", "F0010000", "EPSG:5186")
    assert gdf is not None
    return gdf


def test_no_cpg_reads_cp949(tmp_path):
    gdf = _read(_sheet_zip(tmp_path, with_cpg=False))
    assert "등고수치" in gdf.columns
    assert sorted(gdf["등고수치"].tolist()) == [100.0, 105.0]
    assert set(gdf["구분"]) == {"주곡선"}


def test_with_cpg_unchanged(tmp_path):
    gdf = _read(_sheet_zip(tmp_path, with_cpg=True))
    assert sorted(gdf["등고수치"].tolist()) == [100.0, 105.0]


def test_merge_keys_carry_parser_version():
    assert parser.PARSER_VERSION >= 2
    for rel in (
        "B04_PreProcess/B04_PreProcess_Engine.py",
        "D03_PlanAnalysis/D03_PlanAnalysis_Terrain.py",
    ):
        text = (ROOT / rel).read_text(encoding="utf-8")
        assert '"parser": PARSER_VERSION' in text, rel