import sqlite3

import pytest

from src import session_store
from src.session_store import SessionStore, SessionStoreError


def test_revocation_is_durable_and_scoped_to_one_session(tmp_path):
    now = [1_000.0]
    database = tmp_path / "sessions.sqlite3"
    first = SessionStore(database, clock=lambda: now[0])
    first.activate("first-session-secret", 2_000)
    first.activate("second-session-secret", 2_000)

    reconstructed = SessionStore(database, clock=lambda: now[0])
    reconstructed.revoke("first-session-secret")

    assert reconstructed.is_active("first-session-secret", 2_000) is False
    assert reconstructed.is_active("second-session-secret", 2_000) is True
    assert b"first-session-secret" not in database.read_bytes()
    assert b"second-session-secret" not in database.read_bytes()


def test_validation_does_not_create_a_missing_registry(tmp_path):
    database = tmp_path / "sessions.sqlite3"
    store = SessionStore(database, clock=lambda: 1_000.0)

    with pytest.raises(SessionStoreError):
        store.is_active("unknown-session", 2_000)

    assert database.exists() is False


def test_validation_executes_only_a_read_query(tmp_path, monkeypatch):
    store = SessionStore(tmp_path / "sessions.sqlite3", clock=lambda: 1_000.0)
    store.activate("active-session", 2_000)
    statements = []
    connect = sqlite3.connect

    def traced_connect(*args, **kwargs):
        connection = connect(*args, **kwargs)
        connection.set_trace_callback(statements.append)
        return connection

    monkeypatch.setattr(session_store.sqlite3, "connect", traced_connect)

    assert store.is_active("active-session", 2_000) is True
    assert [statement.split()[0].upper() for statement in statements] == ["SELECT"]


def test_expired_sessions_are_rejected_without_writing_during_validation(tmp_path):
    now = [1_000.0]
    store = SessionStore(tmp_path / "sessions.sqlite3", clock=lambda: now[0])
    store.activate("expiring-session", 1_001)

    now[0] = 1_001.0

    assert store.is_active("expiring-session", 1_001) is False
    with sqlite3.connect(store.path) as connection:
        assert connection.execute("SELECT COUNT(*) FROM active_sessions").fetchone() == (1,)