"""`okf project`: one folder in, one bundle plus one skill out.

The command adds no rule and owns no flag that changes a bundle's bytes, so
these tests are mostly about that: the project bundle must be the SAME bytes
`okf build` writes for the same folder at the same stamp, or there are two
build paths and the reports are pinned to one of them.
"""

from __future__ import annotations

import hashlib
import inspect
import subprocess
import sys
from pathlib import Path

import pytest

PROJECT_ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(PROJECT_ROOT / "src"))

from llm_ingestion_okf import project  # noqa: E402
from llm_ingestion_okf.cli import (  # noqa: E402
    build,
    parse_args,
)
from llm_ingestion_okf.cli import main as okf_main  # noqa: E402
from llm_ingestion_okf.errors import IngestError  # noqa: E402

DOCUMENTS = {
    "krav.md": (
        "## 4 Grunnforhold\n\nGrunnen er morene over berg.\n\n"
        "### 4.1 Loesmasser\n\nLoesmassene er telefarlige.\n"
    ),
    "notat.md": "Et notat uten overskrift, uten tabell og uten nummerering.\n",
}


@pytest.fixture
def folder(tmp_path: Path) -> Path:
    target = tmp_path / "Mine Dokumenter"
    target.mkdir()
    for name, body in DOCUMENTS.items():
        (target / name).write_text(body, encoding="utf-8", newline="")
    return target


def tree(root: Path) -> dict[str, str]:
    return {
        path.relative_to(root).as_posix(): hashlib.sha256(path.read_bytes()).hexdigest()
        for path in sorted(root.rglob("*"))
        if path.is_file()
    }


def test_the_project_bundle_is_the_bytes_okf_build_writes(folder: Path, tmp_path: Path) -> None:
    """The invariant the whole command rests on: ONE build path, not two.

    `okf project` runs `okf build` with this package's default and no flag list
    of its own. If it ever grew one, a project bundle and a build bundle of the
    same folder would differ, and every measurement report pinned to the build
    path would be describing a bundle nobody produces.
    """
    out = tmp_path / "project"
    bundle, _, _ = project.create(folder, out=out)

    reference = tmp_path / "reference"
    build(folder, reference, bundle_id="mine-dokumenter", okf_version="0.2")
    assert tree(bundle) == tree(reference)


def test_the_id_defaults_to_the_folder_name_in_the_id_grammar(folder: Path, tmp_path: Path) -> None:
    out = tmp_path / "project"
    bundle, skill_path, _ = project.create(folder, out=out)
    assert bundle == out / ".okf" / "mine-dokumenter"
    assert skill_path == out / ".claude" / "skills" / "mine-dokumenter-consume" / "SKILL.md"
    assert bundle.is_dir() and skill_path.is_file()


def test_a_named_id_is_used_verbatim(folder: Path, tmp_path: Path) -> None:
    out = tmp_path / "project"
    bundle, skill_path, _ = project.create(folder, out=out, bundle_id="anbud-2026")
    assert bundle.name == "anbud-2026"
    assert skill_path.parent.name == "anbud-2026-consume"


def test_a_folder_name_that_reduces_to_nothing_refuses_by_code(tmp_path: Path) -> None:
    """A refusal with a code, not a bundle called `""`.

    A folder named only in punctuation reduces to the empty string, and an
    empty bundle id would produce a bundle whose concepts join on nothing.
    """
    weird = tmp_path / "..."
    weird.mkdir()
    (weird / "a.md").write_text("# A\n\nKropp.\n", encoding="utf-8", newline="")
    with pytest.raises(IngestError) as caught:
        project.create(weird, out=tmp_path / "project")
    assert caught.value.code == "manifest_invalid"


def test_the_folder_name_is_normalised_before_it_is_reduced(tmp_path: Path) -> None:
    """NFC first, for the reason the rest of this package normalises first.

    macOS hands a filename over decomposed, so `é` arrives as `e` plus a
    combining acute. Reduced without normalising, the same visible folder name
    produces two different bundle ids depending on which form it arrived in.
    """
    assert project.slug("Prosjekt É") == project.slug("Prosjekt É")


def test_the_summary_names_the_documents_that_landed_whole(folder: Path, tmp_path: Path) -> None:
    """SS 6.4 discipline applied to a summary: the number carries its denominator.

    `notat.md` has no heading, no table and no numbered outline, so the rules
    find no boundary and it lands as one concept. A reader who is told only
    "3 concepts" cannot tell that asking about that document returns the whole
    of it as one excerpt.
    """
    out = tmp_path / "project"
    _, _, summary = project.create(folder, out=out)
    assert "Read 2 document(s)" in summary
    assert "1 of 2 document(s) landed WHOLE" in summary
    assert "notat.md" in summary
    assert "krav.md" not in summary
    assert "[sourced-not-sufficient]" in summary
    assert f"NEXT: start claude again in {out}" in summary


def test_a_document_that_is_in_the_bundle_is_not_reported_as_missing(
    folder: Path, tmp_path: Path
) -> None:
    """The known-positive for `inventory`'s first list.

    Its own control: with every document ingested the list must be empty, and
    with the bundle read against a DIFFERENT folder every document must appear.
    A search that cannot find would report an empty list either way.
    """
    out = tmp_path / "project"
    bundle, _, _ = project.create(folder, out=out)
    missing, whole = project.inventory(folder, bundle)
    assert missing == ()
    assert whole == ("notat.md",)

    other = tmp_path / "other"
    other.mkdir()
    (other / "fremmed.md").write_text("# Fremmed\n\nKropp.\n", encoding="utf-8", newline="")
    stranger, _ = project.inventory(other, bundle)
    assert stranger == ("fremmed.md",)


def test_the_generated_skill_names_no_path_into_this_repository(
    folder: Path, tmp_path: Path
) -> None:
    """O5's whole point, asserted where a user actually meets it.

    The known-positive runs first: the string this searches for occurs in the
    environment running the test, so a zero means the generator kept it out.
    """
    out = tmp_path / "project"
    _, skill_path, _ = project.create(folder, out=out)
    text = skill_path.read_text(encoding="utf-8")
    assert str(PROJECT_ROOT) in str(Path(__file__).resolve())
    assert str(PROJECT_ROOT) not in text
    assert "okf consume" in text
    assert "okf check" in text


def test_the_subcommand_exists_and_reports_zero(folder: Path, tmp_path: Path) -> None:
    assert okf_main(["project", str(folder), "--out", str(tmp_path / "project")]) == 0


def test_a_missing_folder_is_two_and_not_one(tmp_path: Path) -> None:
    """Three exit codes, not two: an unread folder is not a refused build."""
    assert okf_main(["project", str(tmp_path / "nope"), "--out", str(tmp_path / "p")]) == 2


def test_the_installed_command_reaches_every_subcommand() -> None:
    """`okf --help` must LIST them, or a reader has to be told they exist.

    The dispatch happens before argparse, so without the registration in
    `parse_args` these four would work and be invisible.
    """
    listed = subprocess.run(
        [sys.executable, "-m", "llm_ingestion_okf.cli", "--help"],
        capture_output=True,
        text=True,
        cwd=PROJECT_ROOT,
    )
    assert listed.returncode == 0
    for command in ("build", "consume", "check", "skill", "project"):
        assert command in listed.stdout, command


# --- The two defaults that were one flag apart (O6) ----------------------------


def test_the_build_signature_defaults_are_the_build_command_defaults() -> None:
    """One flag, one default. `okf project` reads the SIGNATURE, not argparse.

    `project.create` calls `build()` as a Python function and passes no flag
    list, so every segmentation value it gets is the signature's default. When
    a flag moves to ON in argparse and is left OFF in the signature, there are
    two defaults for one flag and `okf project` builds a bundle a rule behind
    the command of the same name.

    The byte-equality test above cannot see this: it calls the same function
    with the same signature, so both sides carry the same wrong value. That is
    the mechanism -- a test and the code agreeing over a set where the
    difference cannot appear.
    """
    parsed = parse_args(["build", "folder", "--bundle", "b", "--okf-version", "0.2"])
    signature = inspect.signature(build)
    disagreeing = {
        name: (parameter.default, getattr(parsed, name))
        for name, parameter in signature.parameters.items()
        if hasattr(parsed, name)
        and parameter.default is not inspect.Parameter.empty
        and type(getattr(parsed, name)) is type(parameter.default)
    }
    disagreeing = {name: pair for name, pair in disagreeing.items() if pair[0] != pair[1]}
    assert disagreeing == {}


def test_a_sheet_reaches_the_project_bundle_as_it_reaches_the_build_command(
    tmp_path: Path,
) -> None:
    """The same folder through both entry doors, on a document that separates them.

    `--sheet-section-rows` and `--keep-table-heading` are ON in `okf build`.
    A markdown table under a heading is the smallest document whose concept
    count moves with them, so this test's set is not empty by construction --
    which is what let the invariant above pass while it was false.
    """
    folder = tmp_path / "Ark"
    folder.mkdir()
    (folder / "krav.md").write_text(
        "# Prisskjema\n\n"
        "## 1 Poster\n\n"
        "| Post | Beskrivelse | Pris |\n|---|---|---|\n"
        "| 01 | Rigg og drift | 100 |\n"
        "| 02 | Grunnarbeid | 200 |\n"
        "| 03 | Betong | 300 |\n"
        "| 04 | Staal | 400 |\n"
        "| 05 | Tak | 500 |\n\n"
        "## 2 Vilkaar\n\nBetaling skjer etter levering.\n",
        encoding="utf-8",
        newline="",
    )

    out = tmp_path / "project"
    bundle, _, _ = project.create(folder, out=out)

    reference = tmp_path / "reference"
    assert (
        okf_main(
            [
                "build",
                str(folder),
                "--bundle",
                str(reference),
                "--bundle-id",
                "ark",
                "--okf-version",
                "0.2",
            ]
        )
        == 0
    )
    assert tree(bundle) == tree(reference)