"""/api/drawing/dxf: browser R12 DXF (Unicode escapes) -> Korean code page (ANSI_949)."""
import os
import tempfile

import pyogrio
from fastapi.testclient import TestClient

from backend.main import app, dxf_to_cp949

DXF = "\r\n".join([
    "0", "SECTION", "2", "HEADER", "9", "$ACADVER", "1", "AC1009", "0", "ENDSEC",
    "0", "SECTION", "2", "ENTITIES",
    "0", "TEXT", "8", "TITLE", "10", "1", "20", "2", "30", "0", "40", "2.5", "1", r"\U+C218\U+B9AC \U+C885\U+B2E8\U+BA74\U+B3C4 \U+1F600",
    "0", "ENDSEC", "0", "EOF", "",
])


def test_conversion_reads_back_as_korean():
    data = dxf_to_cp949(DXF)
    assert b"$DWGCODEPAGE\r\n3\r\nANSI_949" in data
    with tempfile.TemporaryDirectory() as tmp:
        p = os.path.join(tmp, "t.dxf")
        open(p, "wb").write(data)
        meta, _, _, fields = pyogrio.raw.read(p)
        text = fields[list(meta["fields"]).index("Text")][0]
    assert text.startswith("수리 종단면도")
    assert r"\U+1F600" in data.decode("cp949")  # outside CP949: kept escaped


def test_endpoint():
    with TestClient(app) as c:
        r = c.post("/api/drawing/dxf", json={"dxf": DXF, "name": "수리 종단면도"})
        assert r.status_code == 200 and "attachment" in r.headers["content-disposition"]
        assert "수리".encode("cp949") in r.content
        assert c.post("/api/drawing/dxf", json={"dxf": "nope"}).status_code == 400