"""Verify `hermes -c` picks the session the user most recently used."""

from __future__ import annotations

from hermes_cli.main import _resolve_last_session


class _FakeDB:
    def __init__(self, rows):
        self._rows = rows
        self.closed = False

    def search_sessions(self, source=None, limit=20, **_kw):
        rows = [r for r in self._rows if r.get("source") == source] if source else list(self._rows)
        return rows[:limit]

    def close(self):
        self.closed = True


def test_resolve_last_session_prefers_last_active_over_started_at(monkeypatch):
    # `search_sessions` returns in started_at DESC order, but the most recently
    # *touched* session may have been started earlier. -c should pick by
    # last_active so closing the active session and typing `hermes -c` resumes
    # that one, not an older-but-newer-started session from another window.
    rows = [
        {
            "id": "new_started_old_active",
            "source": "cli",
            "started_at": 1000.0,
            "last_active": 100.0,
        },
        {
            "id": "old_started_recently_active",
            "source": "cli",
            "started_at": 500.0,
            "last_active": 999.0,
        },
    ]

    fake_db = _FakeDB(rows)
    monkeypatch.setattr("hermes_state.SessionDB", lambda: fake_db)

    assert _resolve_last_session("cli") == "old_started_recently_active"
    assert fake_db.closed


def test_resolve_last_session_returns_none_when_empty(monkeypatch):
    monkeypatch.setattr("hermes_state.SessionDB", lambda: _FakeDB([]))
    assert _resolve_last_session("cli") is None


def test_resolve_last_session_falls_back_to_started_at(monkeypatch):
    # When last_active is missing entirely (legacy row), fall back to
    # started_at so the helper still picks the newest session.
    rows = [
        {"id": "older", "source": "cli", "started_at": 10.0},
        {"id": "newer", "source": "cli", "started_at": 20.0},
    ]
    monkeypatch.setattr("hermes_state.SessionDB", lambda: _FakeDB(rows))
    assert _resolve_last_session("cli") == "newer"