"""
Every way a file is saved goes through a name that can be written everywhere
(docs/MESHBAY_DESIGN.md §10, `static/portable-name.js`).

The rule itself is held to Python's by `test_portable_name_parity.py`. What this
holds is that the save paths use it: a single file under `portableName`, the
entries of a folder's zip and the archive's own name under `portablePath` /
`portableName`, and the node's own name never handed to a save target directly.
Read from the source, because these paths need a browser and a disk to run.
"""

import re
from pathlib import Path

STATIC = Path(__file__).resolve().parents[1] / "src" / "meshbay_hub" / "static"
FILE_UTILS = (STATIC / "file-utils.js").read_text(encoding="utf-8")


def _body(name: str) -> str:
    m = re.search(rf"^async function {name}\(.*?^\}}", FILE_UTILS, re.M | re.S)
    assert m, f"file-utils.js no longer has {name}"
    return m.group(0)


def test_a_single_file_is_saved_under_a_portable_name():
    body = _body("downloadEntry")
    assert "portableName(entry.name)" in body
    assert "_openTargetInTurn(saveName" in body
    assert "_saveBlob(blob, saveName)" in body
    assert "_openTargetInTurn(entry.name" not in body
    assert "_saveBlob(blob, entry.name)" not in body


def test_a_zip_writes_portable_names_and_is_named_portably():
    body = _body("downloadDirectory")
    assert "zip.begin(portablePath(name)" in body
    assert "portableName(dir.split('/').pop()" in body


def test_a_renamed_file_is_said_so_on_its_row():
    assert "t('transfers.renamed'" in _body("downloadEntry")
    assert "t('transfers.renamed_n'" in _body("downloadDirectory")