"""PLAN 538 [?] 사용자 가이드 — 변환 글 · 그림 내려주기 · 바로 고침.

짝: `ui_template/ui_template_help.ts`(`renderHelpMarkdown`)
— `helper_538_help_render.cjs` 가 Node 로 돌림 ·
`common_util/common_util_help_router.py`(GET /api/help · 그림 · PUT · POST).
"""

from __future__ import annotations

import json
import os
import shutil
import subprocess
import tempfile
from pathlib import Path

import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient

from common_util import common_util_help_router as help_router
from common_util.common_util_auth import verify_session

HERE = os.path.dirname(__file__)


@pytest.fixture(scope="module")
def html() -> dict:
    proc = subprocess.run(  # noqa: S603 — 고정 실행 파일
        ["node", os.path.join(HERE, "helper_538_help_render.cjs")],
        capture_output=True,
        text=True,
        encoding="utf-8",
        timeout=60,
    )
    assert proc.returncode == 0, proc.stderr
    return json.loads(proc.stdout)


def test_덩어리마다_원문_줄(html) -> None:
    admin = html["admin"]
    for tag in [
        '<h2 data-src="0-0">',
        '<p data-src="2-3">',
        '<ul data-src="5-6">',
        'class="ui-markdown-table" data-src="8-10"',
        'data-src="12-13"',
        '<figure data-src="17-17"',
    ]:
        assert tag in admin, tag
    assert '<ul data-src="2-3">' in html["crlf"]


def test_페이지_안_넘기면_옛_출력(html) -> None:
    """B01 지식 채팅 — 원문 줄 · 그림 · 상자 · 링크 없음."""
    plain = html["plain"]
    assert "data-src" not in plain and "<figure" not in plain and "<aside" not in plain
    assert plain.startswith("<h2>종단 설계</h2><p>첫 문단 [표준 횡단](B06/00_설명서)")


def test_그림_상자_링크(html) -> None:
    admin, user = html["admin"], html["user"]
    assert (
        '<img src="/api/help/B05/img/b05_full.webp?v=abc" alt="화면 통째" loading="lazy">' in admin
    )
    assert "<figcaption>화면 통째</figcaption>" in admin
    assert "그림 없음 — 더블클릭해 지정" in admin and "그림 없음" not in user
    assert "그림 준비 중" in user
    assert (
        '<aside class="ui-help-note ui-help-note--warn" data-src="12-13"><strong>주의</strong>'
        in admin
    )
    assert '<aside class="ui-help-note ui-help-note--info"' in admin
    assert 'data-help-goto="B06/00_설명서">표준 횡단</a>' in admin
    assert 'data-help-goto="B05/구조물_돌쌓기(메)">돌쌓기</a>' in admin


def test_html_은_먼저_막음(html) -> None:
    for out in html.values():
        assert "<script>" not in out
    assert "../x.webp" in html["admin"] and 'data-img="../x.webp"' not in html["admin"]


# ── 서버 ─────────────────────────────────────────────────────────────────────


@pytest.fixture
def root(monkeypatch):
    path = Path(tempfile.mkdtemp())
    (path / "B05").mkdir()
    (path / "B05" / "00_설명서.md").write_bytes("# 종단\n\n첫 문단\n".encode())
    monkeypatch.setattr(help_router, "HELP_ROOT", path)
    yield path
    shutil.rmtree(path, ignore_errors=True)


def client(role: str = "SYSTEM_ADMIN") -> TestClient:
    app = FastAPI()
    app.include_router(help_router.router)
    app.dependency_overrides[verify_session] = lambda: {"role": role, "user_id": 1}
    return TestClient(app)


def test_guide_admin_칸(root) -> None:
    assert client().get("/api/help").json()["admin"] is True
    body = client("USER").get("/api/help").json()
    assert body["admin"] is False and body["pages"][0]["page"] == "B05"


def test_그림_내려주기_no_cache(root) -> None:
    (root / "B05" / "full.webp").write_bytes(b"RIFF0000WEBP")
    res = client("USER").get("/api/help/B05/img/full.webp")
    assert res.status_code == 200 and res.content == b"RIFF0000WEBP"
    assert res.headers["cache-control"] == "no-cache"
    assert res.headers["content-type"] == "image/webp"
    assert list(client().get("/api/help").json()["pages"][0]["images"]) == ["full.webp"]


@pytest.mark.parametrize(
    "url",
    [
        "/api/help/B05/img/none.webp",
        "/api/help/B05/img/00_설명서.md",
        "/api/help/B05/img/..%2F..%2Fmain.py",
        "/api/help/B05/img/a.gif",
        "/api/help/..%2FB05/img/full.webp",
        "/api/help/b05/img/full.webp",
    ],
)
def test_그림_404(root, url) -> None:
    (root / "B05" / "full.webp").write_bytes(b"RIFF0000WEBP")
    assert client().get(url).status_code == 404


# ── 538-3 글 바로 고침 ────────────────────────────────────────────────────────


def put(c: TestClient, version: str, start: int, end: int, text: str, key: str = "00_설명서"):
    body = {"version": version, "start": start, "end": end, "text": text}
    return c.put(f"/api/help/B05/{key}", json=body)


def version_of(root: Path) -> str:
    return help_router.file_version((root / "B05" / "00_설명서.md").read_bytes())


def test_그_줄만_갈고_새_판(root) -> None:
    old = version_of(root)
    res = put(client(), old, 2, 2, "고친 문단\n둘째 줄")
    assert res.status_code == 200
    item = res.json()["item"]
    text = (root / "B05" / "00_설명서.md").read_bytes().decode()
    assert text == "# 종단\n\n고친 문단\n둘째 줄\n" == item["text"]
    assert item["version"] == version_of(root) != old
    assert put(client(), item["version"], 2, 3, "").status_code == 200  # 빈 글 = 그 줄 지움
    assert (root / "B05" / "00_설명서.md").read_bytes().decode() == "# 종단\n\n"


def test_crlf_bom_그대로(root) -> None:
    path = root / "B05" / "00_설명서.md"
    path.write_bytes(b"\xef\xbb\xbf# A\r\n\r\nB\r\n")
    assert put(client(), version_of(root), 2, 2, "C").status_code == 200
    assert path.read_bytes() == b"\xef\xbb\xbf# A\r\n\r\nC\r\n"


def test_판_다르면_409_파일_그대로(root) -> None:
    before = (root / "B05" / "00_설명서.md").read_bytes()
    assert put(client(), "0" * 16, 2, 2, "남의 글").status_code == 409
    assert (root / "B05" / "00_설명서.md").read_bytes() == before


def test_시스템_관리자만_403(root) -> None:
    before = (root / "B05" / "00_설명서.md").read_bytes()
    for role in ["USER", "COMPANY_ADMIN"]:
        assert put(client(role), version_of(root), 2, 2, "x").status_code == 403
    assert (root / "B05" / "00_설명서.md").read_bytes() == before


@pytest.mark.parametrize(
    ("start", "end", "key", "code"),
    [
        (3, 2, "00_설명서", 400),
        (0, 9, "00_설명서", 400),
        (0, 0, "없음", 404),
        (0, 0, "_manual", 404),
        (0, 0, "..%2F..%2FCLAUDE", 404),
    ],
)
def test_나쁜_범위_항목(root, start, end, key, code) -> None:
    assert put(client(), version_of(root), start, end, "x", key).status_code == code


def test_원자_쓰기_실패해도_원본_그대로(root, monkeypatch) -> None:
    before = (root / "B05" / "00_설명서.md").read_bytes()

    def boom(*_args):
        raise OSError("쓰기 실패")

    monkeypatch.setattr("common_util.common_util_atomic.os.replace", boom)
    with pytest.raises(OSError):
        put(client(), version_of(root), 2, 2, "반쯤")
    assert (root / "B05" / "00_설명서.md").read_bytes() == before
    assert sorted(p.name for p in (root / "B05").iterdir()) == [
        "00_설명서.md"
    ]  # 임시 파일 남지 않음