"""A reply's sections are chosen, not filled (#4153, milestone 409 step 7).

WHY THIS EXISTS

Step 6 measured the scaffold on live sessions and found the two halves
disagreeing: **adherence passed and the read test failed.** Completion replies
carried every section the table asks for — placement, what changed, what needs
the operator, what comes next — and the operator still could not read them.

The cause was in the skill rather than in compliance with it. It said to pick a
kind of reply "then fill its sections… keep them even when one is short", which
is an instruction to complete a form. Nothing anywhere set a ceiling, and a
section with a heading and nothing to say gets filled rather than dropped. So a
faithful reply and an unreadable one were the same reply.

WHAT IS PINNED

The discipline, not the scaffold. The fifteen categories and their sections are
unchanged and are not this file's subject:

  1. Sections are chosen — a standing question is always answered, an
     explanation earns its place.
  2. The reply is as short as the answer allows, and gets a second pass for
     what can go.
  3. "Needs you" takes BOTH tests: theirs to decide, and blocking.
  4. A decision already made is acted on rather than re-argued.

RULE 167, AND WHY THERE IS NO ABSENCE CHECK HERE

The obvious guard — assert the skill no longer tells anyone to "fill" a
section — is the trap snippet #3352 names. This skill legitimately discusses
filling in order to warn against it ("not a form to complete", "a section
filled because it was in the table"), so an absence check would fail on the
corrected text: a false alarm about the very thing it protects.

So every assertion here is a PRESENCE check, and one is POSITIONAL —
`test_the_needs_you_test_sits_with_the_needs_you_section` pins where the test
lives, not merely that the words occur somewhere in the file. All four were
falsified against the pre-#4153 text before being committed.
"""
from __future__ import annotations

import pathlib

ROOT = pathlib.Path(__file__).resolve().parents[1]
SKILL = ROOT / "plugin/skills/reporting-back/SKILL.md"


def _flat() -> str:
    """Whitespace-flattened: the file is hard-wrapped, so phrases straddle lines."""
    return " ".join(SKILL.read_text().split()).lower()


def test_sections_are_chosen_rather_than_completed():
    """The framing the operator reacted to was "fill its sections"."""
    text = _flat()
    assert "not a form to complete" in text
    # Both halves of the distinction, or "choose" collapses back into "fill":
    # a standing question is answered even when the answer is nothing, an
    # explanation is dropped when it changes nothing.
    assert "always answered, even when the answer is nothing" in text
    assert "changes what the operator does or decides" in text


def test_the_reply_carries_a_length_discipline():
    """Without a ceiling, every section is an invitation to keep writing."""
    text = _flat()
    assert "write the shortest reply that carries the answer" in text
    # And the ceiling has named exceptions, so this cannot be read as
    # "always be terse" — a measurement the operator asked for still earns room.
    assert "extra length has to be earned" in text


def test_the_reply_gets_a_second_pass_for_what_can_go():
    """Cutting is a separate act from writing, and needs saying separately.

    The pre-existing check asked whether anything was MISSING, which a bloated
    reply passes.
    """
    text = _flat()
    assert "what can go" in text
    # Cutting must not read as withholding, or it will not be done.
    assert "cutting is not hiding" in text


def test_the_needs_you_test_sits_with_the_needs_you_section():
    """POSITIONAL. The test has to be where the section is defined.

    A reader reaches this while writing that section; stated anywhere else it
    is a paragraph nobody is reading at the moment it applies. Asserted by
    offset rather than by presence, so moving it away fails here.
    """
    raw = " ".join(SKILL.read_text().split())
    lowered = raw.lower()

    needs_you = lowered.index("- **needs you** — an action")
    the_test = lowered.index("is this theirs to decide")
    next_bullet = lowered.index("- **next** —", needs_you)

    assert needs_you < the_test < next_bullet, (
        "the needs-you test has moved out of the Needs you bullet; a reader "
        "writing that section will not meet it"
    )
    # Both halves are load-bearing: "theirs" alone still admits a question the
    # session could have answered, "blocking" alone admits one that is not
    # theirs to make.
    assert "work waiting on it" in lowered
    assert "not for what you are unsure about" in lowered


def test_a_settled_decision_is_acted_on_rather_than_re_argued():
    """Re-opening a decision reads as self-contradiction, not as diligence.

    Phrased as a practice rather than a prohibition (rule 165): the instruction
    is what to DO with a decision, with the failure named after it.
    """
    text = _flat()
    assert "a decision already made gets acted on" in text
    assert "reads as contradicting yourself rather than as being careful" in text
    # The escape hatch stays open, or this becomes a rule against ever
    # correcting anything — which is the opposite of what is wanted.
    assert "genuinely overturns the choice" in text


def test_the_scaffold_itself_is_untouched():
    """This step changed the discipline AROUND the sections, not the sections.

    If a future edit deletes a category while tightening the prose, that is a
    change to #4009's subject and should not ride along silently here.
    """
    text = _flat()
    for section in ("where this sits", "what now works", "how / why",
                    "needs you", "next"):
        assert section in text, f"completion-report section {section!r} is gone"
    for kind in ("completion", "finding", "blocked / failed", "progress",
                 "decision", "clarification", "handoff", "approval", "conflict"):
        assert kind in text, f"reply kind {kind!r} is gone"