"""TDD — release_analysis must not access commit_meta (dropped in migration 0020)."""
from __future__ import annotations

import pytest
import msgpack
from datetime import datetime, timezone
from sqlalchemy.ext.asyncio import AsyncSession

from musehub.db.musehub_repo_models import MusehubBranch, MusehubCommit, MusehubCommitRef, MusehubSnapshot, MusehubSnapshotRef
from musehub.types.json_types import JSONObject
from tests.factories import create_repo
from muse.core.types import blob_id


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


async def _add_snapshot(session: AsyncSession, repo_id: str, seed: str, manifest: JSONObject) -> str:
    snap_id = blob_id(f"snap-{seed}".encode())
    session.add(MusehubSnapshot(
        snapshot_id=snap_id,
        directories=[],
        manifest_blob=msgpack.packb(manifest, use_bin_type=True),
        entry_count=len(manifest),
        created_at=_utc(),
    ))
    session.add(MusehubSnapshotRef(repo_id=repo_id, snapshot_id=snap_id))
    await session.commit()
    return snap_id


async def _add_commit(session: AsyncSession, repo_id: str, seed: str, snap_id: str | None = None, **kwargs: typing.Any) -> MusehubCommit:
    row = MusehubCommit(
        commit_id=blob_id(seed.encode()),
        branch="dev",
        parent_ids=[],
        message=f"feat: {seed}",
        author="gabriel",
        timestamp=_utc(),
        snapshot_id=snap_id,
        **kwargs,
    )
    session.add(row)
    session.add(MusehubCommitRef(repo_id=repo_id, commit_id=row.commit_id))
    session.add(MusehubBranch(
        branch_id=blob_id(f"br-{seed}".encode()),
        repo_id=repo_id,
        name="dev",
        head_commit_id=row.commit_id,
    ))
    await session.commit()
    return row


# ---------------------------------------------------------------------------
# RL1 — _load_commit_chain does not crash with AttributeError on commit_meta
# ---------------------------------------------------------------------------

@pytest.mark.asyncio
async def test_rl1_load_commit_chain_no_commit_meta(
    db_session: AsyncSession,
) -> None:
    """_load_commit_chain must not raise AttributeError on commit_meta."""
    from musehub.services.release_analysis import _walk_commits

    repo = await create_repo(db_session, owner="gabriel", visibility="public")
    snap_id = await _add_snapshot(db_session, repo.repo_id, "rl1", {"src/app.py": blob_id(b"content")})
    commit = await _add_commit(
        db_session, repo.repo_id, "rl1-c1", snap_id,
        agent_id="claude-code", model_id="claude-sonnet-4-6",
        sem_ver_bump="minor",
    )

    result = await _walk_commits(db_session, repo.repo_id, commit.commit_id, max_commits=10)
    assert isinstance(result, list)
    assert len(result) == 1
    assert result[0]["agent_id"] == "claude-code"
    assert result[0]["model_id"] == "claude-sonnet-4-6"