"""D03 거리재기 「노선 따라」 셈(PLAN 600-2 · 요구 463-23) — `logic/D03_PlanAnalysis_Measure.ts`.

같은 선 = 누가 차 · 갈래 ↔ 본선 = 갈래 고리를 따라 올라가 만나는 점까지 · 이어지지 않은 본선끼리 = null.
TS 를 tsc 로 옮겨 node 로 돌림(서버 · 화면 없이).

./venv/Scripts/python.exe -m pytest resources/tester/test_600_2_plan_measure.py -q
"""

from __future__ import annotations

import json
import re
import subprocess
from pathlib import Path

import pytest

ROOT = Path(__file__).resolve().parents[2]
TS_FILE = ROOT / "D03_PlanAnalysis" / "logic" / "D03_PlanAnalysis_Measure.ts"
TSC = ROOT / "config" / "node_modules" / "typescript" / "bin" / "tsc"

# main 200 m (0,0)→(100,0)→(100,100) · b1 = main 꼭짓점 1 에서 60 m · b2 = b1 끝에서 40 m · other = 이어지지 않은 본선
NETWORK = {
    "pieces": [],
    "lines": [
        {"id": "main", "vertices": [[0, 0], [100, 0], [100, 100]], "branch": None},
        {"id": "b1", "vertices": [[100, 0], [160, 0]], "branch": {"line": "main", "vertex": 1}},
        {"id": "b2", "vertices": [[160, 0], [160, 40]], "branch": {"line": "b1", "vertex": 1}},
        {"id": "other", "vertices": [[0, 500], [50, 500]], "branch": None},
    ],
}

CASES = {
    "same": ["routeSpan", NETWORK, {"line": "main", "atM": 40}, {"line": "main", "atM": 150}],
    "same_back": ["routeSpan", NETWORK, {"line": "main", "atM": 150}, {"line": "main", "atM": 40}],
    "branch_main_after": [
        "routeSpan",
        NETWORK,
        {"line": "b1", "atM": 30},
        {"line": "main", "atM": 150},
    ],
    "branch_main_before": [
        "routeSpan",
        NETWORK,
        {"line": "b1", "atM": 30},
        {"line": "main", "atM": 60},
    ],
    "twig_root": ["routeSpan", NETWORK, {"line": "b2", "atM": 40}, {"line": "main", "atM": 0}],
    "twig_twig": ["routeSpan", NETWORK, {"line": "b2", "atM": 10}, {"line": "b1", "atM": 20}],
    "apart": ["routeSpan", NETWORK, {"line": "main", "atM": 10}, {"line": "other", "atM": 10}],
    "near_branch": ["nearestOnRoute", NETWORK, [130, 5], {"line": "main", "atM": 10}],
    "near_other_excluded": ["nearestOnRoute", NETWORK, [20, 490], {"line": "main", "atM": 10}],
}

_RUNNER = """
import { readFileSync, writeFileSync } from "node:fs";
import * as measure from "./D03_PlanAnalysis/logic/D03_PlanAnalysis_Measure.js";
const cases = JSON.parse(readFileSync(process.argv[2], "utf8"));
const out = {};
for (const [key, [name, ...args]] of Object.entries(cases)) out[key] = measure[name](...args);
writeFileSync(process.argv[3], JSON.stringify(out));
"""


@pytest.fixture(scope="module")
def r(tmp_path_factory: pytest.TempPathFactory) -> dict:
    tmp = tmp_path_factory.mktemp("measure")
    out = tmp / "js"
    subprocess.run(  # noqa: S603 — 고정 실행 파일
        [
            "node",
            str(TSC),
            str(TS_FILE),
            "--outDir",
            str(out),
            "--rootDir",
            str(ROOT),
            "--module",
            "esnext",
            "--target",
            "es2022",
            "--moduleResolution",
            "bundler",
            "--ignoreConfig",
        ],
        cwd=str(ROOT),
        check=True,
        capture_output=True,
    )
    for emitted in out.rglob("*.js"):
        emitted.write_text(
            re.sub(r'(from\s+"\.\.?/[^"]+)"', r'\1.js"', emitted.read_text(encoding="utf-8")),
            encoding="utf-8",
        )
    (out / "runner.mjs").write_text(_RUNNER, encoding="utf-8")
    job, result = tmp / "job.json", tmp / "out.json"
    job.write_text(json.dumps(CASES), encoding="utf-8")
    subprocess.run(  # noqa: S603
        ["node", str(out / "runner.mjs"), str(job), str(result)],
        cwd=str(ROOT),
        check=True,
        capture_output=True,
    )
    return json.loads(result.read_text(encoding="utf-8"))


def test_같은_선은_누가_차(r):
    assert r["same"]["lengthM"] == pytest.approx(110)
    assert r["same"]["stations"] == [40, 150]
    assert r["same"]["path"][0] == [40, 0]
    assert r["same"]["path"][-1] == [100, 50]
    assert r["same_back"]["lengthM"] == pytest.approx(110)
    assert r["same_back"]["path"][0] == [100, 50]


def test_갈래에서_본선으로(r):
    """갈래 30 m 지점 → 갈래 첫 점(30) → 본선 100 m → 150 m(50) = 80 · 본선 60 m 쪽 = 30 + 40 = 70."""
    assert r["branch_main_after"]["lengthM"] == pytest.approx(80)
    assert r["branch_main_after"]["stations"] is None
    assert r["branch_main_after"]["path"][0] == [130, 0]
    assert r["branch_main_before"]["lengthM"] == pytest.approx(70)


def test_갈래의_갈래는_고리를_따라_올라감(r):
    """b2 끝(40) → b1 끝(160,0)까지 → b1 첫 점(60) → 본선 0 m(100) = 200 m."""
    assert r["twig_root"]["lengthM"] == pytest.approx(200)
    # b2 10 m(160,10) → b2 첫 점 10 → b1 20 m(120,0) 까지 40 = 50
    assert r["twig_twig"]["lengthM"] == pytest.approx(50)


def test_이어지지_않은_본선은_길_없음(r):
    assert r["apart"] is None


def test_가까운_자리는_이어진_선_안에서만(r):
    assert r["near_branch"]["line"] == "b1"
    assert r["near_branch"]["atM"] == pytest.approx(30)
    assert r["near_other_excluded"]["line"] == "main"