"""Dialogs and toasts, checked without a runtime.

There is no JavaScript test runner here and hard rule 1 keeps Node out of the
project, so the behaviour is driven by hand under a DOM stub before committing.
What can be pinned in the suite are the invariants the file states about itself
-- and in particular the one that would look like an improvement to somebody
tidying up later.
"""

from __future__ import annotations

from pathlib import Path

import lembas

ROOT = Path(lembas.__file__).parent
SOURCE = (ROOT / "web/static/js/ui.js").read_text(encoding="utf-8")
TEMPLATES = ROOT / "web/templates"


def test_the_dialogs_never_fall_back_to_the_browsers_own():
    """`window.confirm` and `window.prompt` cannot be styled, ignore the theme
    and block the tab. Putting one back is the thing this module exists to
    prevent."""
    assert "window.confirm(" not in SOURCE
    assert "window.prompt(" not in SOURCE


def test_no_template_uses_htmx_s_own_prompt():
    """htmx's hx-prompt calls the browser's prompt() *synchronously* and only
    then fires htmx:prompt with the answer already in hand -- so intercepting
    the event cannot supply a different one, and the native box appears
    regardless. `data-prompt` exists because of that, and an hx-prompt slipped
    in later would summon the grey box back with nothing to catch it.

    hx-confirm is fine and is used widely: that one fires *before*, and ui.js
    intercepts it.
    """
    # The attribute, not the word: the comment beside `data-prompt` names
    # hx-prompt in order to say why it is not being used.
    offenders = [
        path.relative_to(TEMPLATES)
        for path in TEMPLATES.rglob("*.html")
        if 'hx-prompt="' in path.read_text(encoding="utf-8")
    ]
    assert not offenders, f"hx-prompt summons window.prompt: {offenders}"


def test_the_prompt_answer_is_json_encoded_rather_than_concatenated():
    """A folder called `"` would otherwise produce hx-vals that does not parse,
    and htmx would send the request with the field missing rather than with the
    name -- a rename that silently does nothing."""
    start = SOURCE.index("[data-prompt]")
    block = SOURCE[start : SOURCE.index("data-confirm", start)]
    assert "JSON.stringify" in block


def test_every_prompt_button_names_a_field_or_takes_the_default():
    """The field name is what the route reads. A button with a field the route
    does not look at posts nothing and looks exactly like one that works."""
    for path in TEMPLATES.rglob("*.html"):
        text = path.read_text(encoding="utf-8")
        if "data-prompt=" not in text:
            continue
        # Either an explicit field, or the "name" default the handler applies.
        assert "data-prompt-field" in text or "/api/folders" in text, path
