"""Unit tests for the admin promote / demote helpers.

C5 contract: the admin gate distinguishes in-set from out-of-set
users, ``promote_row`` and ``demote_row`` flip the two validation
fields on the right row, and a repeat promotion is idempotent. Every
``results.jsonl`` read and write is mocked, so the suite makes zero
Hub calls.
"""
from __future__ import annotations

import json
import os
from types import SimpleNamespace

import pytest

# submit.py kicks off a Hub-touching stuck-pending sweep at import.
# Disable it before importing (admin imports submit) so running this
# file in isolation stays offline.
os.environ.setdefault("CADGENBENCH_DISABLE_BOOT_SWEEP", "1")

import admin  # noqa: E402
import submit  # noqa: E402

SEED_ROWS = [
    {
        "submission_id": "alpha",
        "validation_status": "unvalidated",
        "validation_method": None,
        "aggregate_score": 0.5,
    },
    {
        "submission_id": "beta",
        "validation_status": "validated",
        "validation_method": "code",
        "aggregate_score": 0.9,
    },
]


def _jsonl(rows: list[dict]) -> str:
    return "\n".join(json.dumps(r) for r in rows) + "\n"


def _row(rows: list[dict], submission_id: str) -> dict:
    return next(r for r in rows if r["submission_id"] == submission_id)


@pytest.fixture
def hub(monkeypatch):
    """Mock the results.jsonl read + write that ``_hub_rmw_results`` drives.

    ``state["rows"]`` starts as a copy of :data:`SEED_ROWS` and is
    replaced by whatever bytes the helper hands to ``upload_file``,
    re-parsed back into dicts. ``state["uploads"]`` counts the writes
    so a test can assert how many commits a call produced.
    """
    state: dict = {
        "rows": [dict(r) for r in SEED_ROWS],
        "uploads": 0,
        "deleted_paths": [],
    }

    def fake_download() -> str:
        return _jsonl(state["rows"])

    def fake_upload(*, path_or_fileobj, **kwargs) -> None:
        body = (
            path_or_fileobj.decode("utf-8")
            if isinstance(path_or_fileobj, bytes)
            else path_or_fileobj
        )
        state["rows"] = [
            json.loads(line) for line in body.splitlines() if line.strip()
        ]
        state["uploads"] += 1

    def fake_delete_file(*, path_in_repo, **kwargs) -> None:
        state["deleted_paths"].append(path_in_repo)

    monkeypatch.setattr(submit, "_download_results_jsonl", fake_download)
    monkeypatch.setattr(submit._HF_API, "upload_file", fake_upload)
    monkeypatch.setattr(submit._HF_API, "delete_file", fake_delete_file)
    return state


def test_admin_gate_in_set_vs_out_of_set(monkeypatch):
    """is_admin admits logged-in users in the set, rejects everyone else."""
    monkeypatch.setenv("CADGENBENCH_ADMINS", "michaelr27, lvwerra")
    assert admin.is_admin(SimpleNamespace(username="michaelr27")) is True
    assert admin.is_admin(SimpleNamespace(username="lvwerra")) is True
    assert admin.is_admin(SimpleNamespace(username="someone-else")) is False
    # Logged-out is never admin.
    assert admin.is_admin(None) is False
    # Empty / unset variable means no one is admin.
    monkeypatch.delenv("CADGENBENCH_ADMINS", raising=False)
    assert admin.is_admin(SimpleNamespace(username="michaelr27")) is False


def test_promote_happy_path(hub):
    """Promoting an unvalidated row sets status + method, leaves others alone."""
    admin.promote_row("alpha", "manual")
    promoted = _row(hub["rows"], "alpha")
    assert promoted["validation_status"] == "validated"
    assert promoted["validation_method"] == "manual"
    # The other row is untouched.
    assert _row(hub["rows"], "beta")["validation_method"] == "code"
    assert hub["uploads"] == 1


def test_demote_happy_path(hub):
    """Demoting a validated row clears the method and flips status back."""
    admin.demote_row("beta")
    demoted = _row(hub["rows"], "beta")
    assert demoted["validation_status"] == "unvalidated"
    assert demoted["validation_method"] is None
    assert hub["uploads"] == 1


def test_promote_idempotent(hub):
    """Re-promoting an already-validated row lands the same state."""
    admin.promote_row("beta", "code")
    once = dict(_row(hub["rows"], "beta"))
    assert once["validation_status"] == "validated"
    assert once["validation_method"] == "code"
    # Second identical promotion produces an identical row.
    admin.promote_row("beta", "code")
    assert _row(hub["rows"], "beta") == once


def test_promote_rows_bulk(hub):
    """A bulk promote flips every listed row in one write."""
    admin.promote_rows(["alpha", "beta"], "traces")
    for sid in ("alpha", "beta"):
        row = _row(hub["rows"], sid)
        assert row["validation_status"] == "validated"
        assert row["validation_method"] == "traces"
    assert hub["uploads"] == 1


def test_demote_rows_bulk(hub):
    """A bulk demote clears method on every listed row in one write."""
    admin.demote_rows(["alpha", "beta"])
    for sid in ("alpha", "beta"):
        row = _row(hub["rows"], sid)
        assert row["validation_status"] == "unvalidated"
        assert row["validation_method"] is None
    assert hub["uploads"] == 1


def test_promote_rows_missing_id_raises_without_write(hub):
    """An unknown id aborts the whole batch before any upload."""
    with pytest.raises(LookupError):
        admin.promote_rows(["alpha", "ghost"], "code")
    assert hub["uploads"] == 0
    # alpha is untouched since the write never happened.
    assert _row(hub["rows"], "alpha")["validation_status"] == "unvalidated"


def test_empty_selection_raises(hub):
    """Bulk helpers reject an empty / all-falsy selection."""
    for call in (
        lambda: admin.promote_rows([], "code"),
        lambda: admin.demote_rows([None, ""]),
        lambda: admin.delete_rows([]),
    ):
        with pytest.raises(ValueError):
            call()
    assert hub["uploads"] == 0


def test_delete_rows_removes_rows_and_artifacts(hub):
    """Delete drops the rows and best-effort removes their artifacts."""
    admin.delete_rows(["alpha"])
    remaining = {r["submission_id"] for r in hub["rows"]}
    assert remaining == {"beta"}
    # All three companion blobs were targeted for deletion.
    assert hub["deleted_paths"] == [
        "submissions/alpha.zip",
        "reports/alpha.html",
        "reports/alpha.json",
    ]
    assert hub["uploads"] == 1