"""오른쪽 흐름도 패널(`M02_DF_Panel.ts`) 순수 부분 — 끌어서 정한 너비 · 저장해 둔 너비.

화면 TS 를 그 자리에서 트랜스파일해 node 로 돌림(부품 · 판은 빈 흉내 · 순수 함수만).
"""

import json
import shutil
import subprocess
from pathlib import Path

import pytest

ROOT = Path(__file__).resolve().parents[2]
SOURCE = ROOT / "M02_MasterTemplete" / "DataFlow" / "M02_DF_Panel.ts"

RUNNER = r"""
const fs = require("fs");
const path = require("path");
const [root, file] = process.argv.slice(1);
const ts = require(path.join(root, "config", "node_modules", "typescript"));
const js = ts.transpileModule(fs.readFileSync(file, "utf8"), {
  compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
}).outputText;
const stub = new Proxy({}, { get: () => () => undefined });
const box = { exports: {} };
new Function("exports", "module", "require", js)(box.exports, box, () => stub);
const m = box.exports;
const jobs = JSON.parse(fs.readFileSync(0, "utf8"));
const out = jobs.map((j) =>
  j.op === "drag" ? m.dragWidth(j.start, j.startX, j.x, j.viewport)
  : j.op === "stored" ? m.storedWidth(j.raw)
  : j.op === "consts" ? [m.PANEL_MIN, m.STRIP_WIDTH]
  : null,
);
process.stdout.write(JSON.stringify(out));
"""


def run(jobs: list[dict]) -> list:
    if shutil.which("node") is None:
        pytest.skip("node 가 없음")
    done = subprocess.run(
        ["node", "-e", RUNNER, str(ROOT), str(SOURCE)],
        input=json.dumps(jobs, ensure_ascii=False),
        capture_output=True,
        text=True,
        encoding="utf-8",
        check=True,
    )
    return json.loads(done.stdout)


def test_왼쪽_가장자리_끌기_너비():
    [consts, wider, narrower, floor, ceil] = run(
        [
            {"op": "consts"},
            # 왼쪽으로 100 끌면 넓어짐
            {"op": "drag", "start": 480, "startX": 1000, "x": 900, "viewport": 1600},
            # 오른쪽으로 끌면 좁아짐
            {"op": "drag", "start": 480, "startX": 1000, "x": 1060, "viewport": 1600},
            # 너무 좁게 — 가장 작은 너비에서 멈춤
            {"op": "drag", "start": 480, "startX": 1000, "x": 1400, "viewport": 1600},
            # 너무 넓게 — 화면의 85% 에서 멈춤
            {"op": "drag", "start": 480, "startX": 1000, "x": -2000, "viewport": 1600},
        ]
    )
    min_width, strip = consts
    assert (min_width, strip) == (320, 40)
    assert wider == 580 and narrower == 420
    assert floor == min_width and ceil == 1360


def test_저장해_둔_너비():
    got = run(
        [
            {"op": "stored", "raw": "640"},
            {"op": "stored", "raw": "640.6"},
            {"op": "stored", "raw": None},
            {"op": "stored", "raw": "abc"},
            {"op": "stored", "raw": "100"},
        ]
    )
    assert got == [640, 641, None, None, None]