"""TDD — ui_blame commit loading must not read commit_meta."""
from __future__ import annotations

import typing
from collections.abc import Mapping
from datetime import datetime, timezone

import pytest
from httpx import AsyncClient
from muse.core.types import blob_id
from sqlalchemy.ext.asyncio import AsyncSession

from musehub.db import musehub_repo_models as db
from tests.factories import create_repo


def _utc() -> datetime:
    return datetime.now(tz=timezone.utc)


async def _add_commit(session: AsyncSession, repo_id: str, seed: str, **kwargs: typing.Any) -> db.MusehubCommit:
    row = db.MusehubCommit(
        commit_id=blob_id(seed.encode()),
        branch="dev",
        parent_ids=[],
        message=f"feat: {seed}",
        author="gabriel",
        timestamp=_utc(),
        **kwargs,
    )
    session.add(row)
    session.add(db.MusehubCommitRef(repo_id=repo_id, commit_id=row.commit_id))
    await session.commit()
    return row


# ---------------------------------------------------------------------------
# BL1 — blame route does not crash with AttributeError on commit_meta
# ---------------------------------------------------------------------------

@pytest.mark.asyncio
async def test_bl1_blame_route_no_commit_meta_error(
    db_session: AsyncSession,
    client: AsyncClient,
    auth_headers: Mapping[str, str],
) -> None:
    """Blame page must not raise AttributeError on commit_meta."""
    repo = await create_repo(db_session, owner="gabriel", visibility="public")
    commit = await _add_commit(
        db_session, repo.repo_id, "blame-c1",
        agent_id="claude-code", model_id="claude-sonnet-4-6",
    )
    db_session.add(db.MusehubBranch(
        branch_id=blob_id(b"blame-branch"),
        repo_id=repo.repo_id,
        name="dev",
        head_commit_id=commit.commit_id,
    ))
    await db_session.commit()

    resp = await client.get(
        f"/gabriel/{repo.slug}/blame/dev/src/app.py",
        headers=auth_headers,
        follow_redirects=True,
    )
    # 200 or 404 (no snapshot/file) — anything but 500
    assert resp.status_code != 500