"""593-1 시간 표시 — UTC 글 → 보는 PC 시간대(TS) · 서버가 만드는 글 = UTC Z / 한국 시각(Python)."""

import json
import os
import re
import subprocess
from datetime import datetime
from pathlib import Path

import pytest

from common_util import common_util_time as srv

ROOT = Path(__file__).resolve().parents[2]
TSC = ROOT / "config" / "node_modules" / "typescript" / "bin" / "tsc"
SRC = ROOT / "common_util" / "common_util_time.ts"

_RUNNER = """
import { writeFileSync } from "node:fs";
import * as m from "./common_util_time.js";
const now = Date.parse("2026-10-30T20:00:00Z");
const out = {
  tz: Intl.DateTimeFormat().resolvedOptions().timeZone,
  date: ["2026-10-30 01:02:03", "2026-10-30T01:02:03", "2026-10-30T01:02:03Z", "2026-10-30T10:02:03+09:00", null, "", "x"].map((v) => m.dateTimeText(v)),
  day: [m.dateText("2026-10-30T20:30:00Z"), m.dateText("2026-10-30"), m.dateText(null), m.dateText("")],
  time: [m.timeText("2026-10-30 20:30:00"), m.timeText(null)],
  ago: ["2026-10-30T20:00:00Z", "2026-10-30T10:00:00Z", "2026-10-29T10:00:00Z", "2026-10-26T10:00:00Z", "2026-10-01T10:00:00Z", null].map((v) => m.agoText(v, "-", now)),
  kst: m.kstText("2026-10-30 01:02:03"),
};
writeFileSync(process.argv[2], JSON.stringify(out));
"""


@pytest.fixture(scope="module")
def runner(tmp_path_factory):
    if not TSC.is_file():
        pytest.skip("프론트엔드 의존성 미설치")
    tmp = tmp_path_factory.mktemp("time")
    out = tmp / "js"
    args = ["--outDir", str(out), "--module", "esnext", "--target", "es2022", "--ignoreConfig"]
    subprocess.run(
        ["node", str(TSC), str(SRC), *args], cwd=str(ROOT), check=True, capture_output=True
    )  # noqa: S603, S607
    for emitted in out.glob("*.js"):
        text = emitted.read_text(encoding="utf-8")
        emitted.write_text(re.sub(r'(from\s+"\./[^"]+)"', r'\1.js"', text), encoding="utf-8")
    (out / "runner.mjs").write_text(_RUNNER, encoding="utf-8")

    def run(tz: str) -> dict:
        dst = tmp / f"out_{tz.replace('/', '_')}.json"
        env = {**os.environ, "TZ": tz}
        subprocess.run(
            ["node", str(out / "runner.mjs"), str(dst)], check=True, capture_output=True, env=env
        )  # noqa: S603, S607
        return json.loads(dst.read_text(encoding="utf-8"))

    return run


def test_seoul(runner):
    r = runner("Asia/Seoul")
    assert r["tz"] == "Asia/Seoul"
    # Z 없는 옛 글 · ISO · Z · +09:00 모두 같은 한국 시각
    assert r["date"][:4] == ["2026-10-30 10:02"] * 4
    assert r["date"][4:] == ["—", "—", "—"]
    assert r["day"] == ["2026-10-31", "2026-10-30", "-", "-"]  # 20:30Z = 한국 다음 날 05:30
    assert r["time"] == ["05:30", ""]
    assert r["kst"] == "2026-10-30 10:02"
    # 지금 = 한국 10-31 05:00 → 한국 달력 날짜로 센다
    assert r["ago"] == ["오늘", "어제", "2 일 전", "5 일 전", "2026-10-01", "-"]


def test_other_zone_follows_viewer(runner):
    r = runner("America/New_York")  # 10-30 = 서머타임(UTC-4)
    assert r["date"][:4] == ["2026-10-29 21:02"] * 4
    assert r["day"][0] == "2026-10-30"
    assert r["day"][1] == "2026-10-30"  # 날짜만 있는 값은 안 바뀜


def test_server_utc_text():
    assert srv.utc_text(datetime(2026, 10, 30, 1, 2, 3, 999)) == "2026-10-30T01:02:03Z"
    assert srv.utc_text(datetime(2026, 10, 30, 10, 2, 3, tzinfo=srv.KST)) == "2026-10-30T01:02:03Z"
    assert srv.utc_text(None) is None
    assert srv.utc_now_text().endswith("Z")
    assert srv.utc_from_timestamp(0) == "1970-01-01T00:00:00Z"


def test_server_kst():
    assert srv.kst_from_timestamp(0).strftime("%Y-%m-%d %H:%M") == "1970-01-01 09:00"
    assert srv.kst_now().utcoffset().total_seconds() == 9 * 3600
    assert srv.kst_today() == srv.kst_now().date()


def test_응답_시각_끝_Z():
    from fastapi.encoders import jsonable_encoder

    srv.install_json_utc()
    body = jsonable_encoder({"at": datetime(2026, 10, 30, 1, 2, 3), "n": 1})
    assert body == {"at": "2026-10-30T01:02:03Z", "n": 1}