"""B07 횡단도 표 위 CAD 칸 — 횡단배수 미리 넣음(260-4 · 요구 162-21).

⚠ 짝(①) = `B06_Section/B06_Section_UI_Cross_Detail_Cad.ts` `culvertNoteEntities` ·
`stationNoLabel` — 같은 입력 → 같은 엔티티(id 만 다름) · 거울 시험 `test_260_note_cad.py`.
B06 [상세] 모달을 한 번도 안 연 측점(칸 = 없음)에 B07 이 같은 그림을 놓음 · 사용자가 지운 칸
(빈 엔티티)은 덮지 않음 · 옛 글(`structure_note`)이 있으면 옛 글이 먼저
(모달이 처음 열 때 옮기는 차례와 같음).
좌표 = 도면 mm(글 2.0 · 줄 3.0) · 칸 왼쪽 위 = (0, 0) · 아래로 음수.
"""

import json
import math
import re
from pathlib import Path
from typing import Any

from B06_Section.B06_Section_Engine_Culvert import _culvert_set, pipe_points_file
from common_util.common_util_drainage_pipes import PIPE_FACILITY_PIPE, parse_pipe_points

# TS `PIPE_MATCH_M`(`design_selection`) — 관 자리와 측점이 같은 자리로 보는 폭
PIPE_MATCH_M = 0.51
_LAYER_ID = "기본"
_FONT = 2.0
_LINE = 3.0
_COLOR = "#ff7f7f"
_BASIN_FORMS = {"I": "I형", "L": "L형", "U": "ㄷ형"}


def _js_round(value: float) -> int:
    """JS `Math.round` — .5 는 위로."""
    return math.floor(value + 0.5)


def _one(value: Any) -> str:
    ok = isinstance(value, (int, float)) and not isinstance(value, bool) and math.isfinite(value)
    return f"{value:.1f}" if ok else ""


def _metres(value: Any) -> str:
    return f"{_one(value)}m" if _one(value) else ""


def _trim(value: float) -> str:
    rounded = _js_round(value * 100) / 100
    return str(int(rounded)) if rounded == int(rounded) else str(rounded)


def _bond(form: Any) -> str:
    """돌쌓기(찰) · 찰붙임 → 찰 · (메) · 메붙임 → 메 · 그 밖 = 그대로."""
    text = str(form) if form is not None else ""
    return "찰" if "찰" in text else "메" if "메" in text else text


def _side_line(side: Any, title: str) -> str | None:
    if not isinstance(side, dict) or not side.get("structure"):
        return None
    basin = side["structure"] == "집수정"
    form = (
        _BASIN_FORMS.get(side.get("basin_form") or "", "")
        if basin
        else _bond(side.get("revet_form"))
    )
    height = side.get("basin_height_m" if basin else "revet_height_m")
    length = side.get("basin_length_m" if basin else "revet_length_m")
    spec = ",".join(part for part in (form, f"H={_one(height)}") if part)
    return f"관보호공({title}) {side['structure']}({spec}) L={_metres(length)}"


def _area(value: Any) -> float:
    """JS `Number()` 꼴 — 빈 글 = 0 · 못 읽음 = nan."""
    if value is None:
        return math.nan
    if isinstance(value, str) and not value.strip():
        return 0.0
    try:
        return float(value)
    except (TypeError, ValueError):
        return math.nan


def _chute_line(options: dict[str, Any], fallback: str | None) -> str | None:
    picked = sorted(
        int(hit.group(1))
        for key, value in options.items()
        if (hit := re.match(r"^chute_add_(\d+)_structure$", key))
        and str(value if value is not None else "").strip()
    )
    head = f"chute_add_{picked[0]}_" if picked else None
    structure = str(options[f"{head}structure"]).strip() if head else fallback
    if not structure:
        return None
    bond_raw = options.get(f"{head}bond") if head else None
    bond = _bond(bond_raw if bond_raw is not None else "") if head else ""
    area = _area(options.get(f"{head}area")) if head else math.nan
    spec = ",".join(part for part in (structure, bond) if part)
    return f"관유출부보강({spec}) {_trim(area) if area > 0 else ''}m2"


def station_no_label(chainage_m: float, interval_m: float) -> str:
    """측점 이름(대문자 NO · 거리 정수) — TS `stationNoLabel` 짝."""
    safe = interval_m if interval_m > 0 else 1.0
    number = math.floor((chainage_m + 1e-6) / safe)
    rest = chainage_m - number * safe
    if rest >= safe - 0.05:
        number += 1
        rest = 0.0
    return f"NO.{number}" if abs(rest) < 0.05 else f"NO.{number}+{_js_round(rest)}"


def _shape(index: int, kind: str, shape_data: dict[str, Any]) -> dict[str, Any]:
    return {
        "id": f"culvert-note:{index}",
        "type": kind,
        "lineColor": _COLOR,
        "lineWidth": 1,
        "layerId": _LAYER_ID,
        "shapeData": shape_data,
    }


def _text(index: int, label: str, x: float, y: float, align: str = "left") -> dict[str, Any]:
    return _shape(
        index,
        "Text",
        {
            "label": label,
            "basePoint": {"x": x, "y": y},
            "options": {
                "textDirection": {"x": 1, "y": 0},
                "textAlign": align,
                "textColor": _COLOR,
                "fontSize": _FONT,
                "fontFamily": "sans-serif",
            },
        },
    )


def culvert_note_entities(
    chainage_m: float,
    culvert: dict[str, Any] | None,
    design: dict[str, Any] | None,
    station: str,
    options: dict[str, Any] | None = None,
) -> list[dict[str, Any]]:
    """횡단배수 미리 넣음 — 이 측점에 놓인(주인) 배수관만 · 상자형 · 숨은 관 · 이웃 = 빈 목록.

    `culvert` = 측점에 얹힌 세트(`attach_culvert_sets` 꼴) · `options` = 그 관의 `pipe_points` 옵션.
    """
    if not isinstance(culvert, dict) or culvert.get("type") != "pipe":
        return []
    if culvert.get("body") or culvert.get("hidden_pipe"):
        return []
    owner = culvert.get("chainage_m")
    if abs((owner if isinstance(owner, (int, float)) else chainage_m) - chainage_m) >= PIPE_MATCH_M:
        return []
    cx, cy, radius = 6.5, -9.0, 6.5
    length = design.get("pipe_length_m") if isinstance(design, dict) else None
    inside = [
        "배수관",
        f"Φ{_js_round(float(culvert.get('diameter_m') or 0.0) * 1000)}m/m",
        f"L={_metres(length)}",
    ]
    chute = culvert.get("chute") if isinstance(culvert.get("chute"), dict) else {}
    right = [
        line
        for line in (
            station,
            _side_line(culvert.get("inlet"), "유입"),
            _side_line(culvert.get("outlet"), "유출"),
            _chute_line(options or {}, chute.get("structure")),
        )
        if line
    ]
    entities = [
        _shape(0, "Circle", {"center": {"x": cx, "y": cy}, "radius": radius}),
        _shape(
            1,
            "Line",
            {
                "startPoint": {"x": cx, "y": cy - radius},
                "endPoint": {"x": cx, "y": cy - radius - _LINE},
            },
        ),
    ]
    entities += [
        _text(2 + i, line, cx, cy + _LINE * (1 - i), "center") for i, line in enumerate(inside)
    ]
    entities += [_text(5 + i, line, 15, -_LINE * (i + 0.5)) for i, line in enumerate(right)]
    return entities


def load_pipe_notes(project_root: Path) -> list[tuple[float, dict[str, Any], dict[str, Any]]]:
    """정본 `pipe_points.json` 의 배수관 — (관 누가거리, 세트, 옵션) · 관경 안 고름 = 관 없음."""
    path = pipe_points_file(project_root)
    try:
        document = json.loads(path.read_text(encoding="utf-8"))
    except (OSError, json.JSONDecodeError):
        return []
    pipes = []
    for point in parse_pipe_points(document.get("points")):
        options = dict(point.options or {})
        if point.facility != PIPE_FACILITY_PIPE or options.get("pipe_diameter_mm") in (None, ""):
            continue
        spec = {**_culvert_set(options), "chainage_m": float(point.chainage_m)}
        pipes.append((float(point.chainage_m), spec, options))
    return pipes


def with_culvert_note(
    design: dict[str, Any] | None,
    chainage_m: float,
    pipes: list[tuple[float, dict[str, Any], dict[str, Any]]],
    station: str,
) -> dict[str, Any] | None:
    """CAD 칸이 없고 옛 글도 없는 주인 측점 — 미리 넣음을 칸으로 얹은 사본 · 그 밖 = 그대로.

    설계가 없는 측점(dict 아님)은 그대로 — 표 · 계획선 셈이 설계 없음으로 가는 길을 안 바꿈.
    """
    if not isinstance(design, dict) or design.get("structure_note_cad") is not None:
        return design
    if str(design.get("structure_note") or "").strip():
        return design
    near = [pipe for pipe in pipes if abs(pipe[0] - chainage_m) < PIPE_MATCH_M]
    if not near:
        return design
    _at, spec, options = min(near, key=lambda pipe: abs(pipe[0] - chainage_m))
    entities = culvert_note_entities(chainage_m, spec, design, station, options)
    if not entities:
        return design
    return {**design, "structure_note_cad": {"entities": entities}}