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"""Tests for subprocess supervision helpers."""

from __future__ import annotations

import asyncio
from unittest.mock import MagicMock

import pytest

from tokenspeed.cli._proc import (
    spawn_gateway,
    terminate_then_kill,
)


@pytest.mark.asyncio
async def test_spawn_gateway_disables_retries_and_circuit_breaker(monkeypatch):
    """Single-worker mode: retries and circuit-breaker are disabled by default."""

    captured = {}

    async def fake_exec(*cmd, **kwargs):
        captured["cmd"] = cmd

        class _P:
            async def wait(self):
                return 0

        return _P()

    monkeypatch.setattr(asyncio, "create_subprocess_exec", fake_exec)
    await spawn_gateway([], engine_host="127.0.0.1", engine_port=12345)
    cmd = captured["cmd"]
    assert "--disable-retries" in cmd
    assert "--disable-circuit-breaker" in cmd


@pytest.mark.asyncio
async def test_terminate_then_kill_uses_sigterm_first_then_sigkill():
    """If the child doesn't exit within drain_timeout, we escalate to SIGKILL."""
    proc = MagicMock()
    proc.returncode = None  # Still running.
    proc.terminate = MagicMock()
    proc.kill = MagicMock()

    async def fake_wait():
        await asyncio.sleep(0.1)

    proc.wait = MagicMock(side_effect=fake_wait)
    await terminate_then_kill(proc, drain_timeout=0.05)
    proc.terminate.assert_called_once()
    proc.kill.assert_called_once()


@pytest.mark.asyncio
async def test_terminate_then_kill_skips_kill_when_drain_succeeds():
    proc = MagicMock()
    proc.returncode = None

    async def fake_wait():
        proc.returncode = 0
        return

    proc.wait = MagicMock(side_effect=fake_wait)
    proc.terminate = MagicMock()
    proc.kill = MagicMock()
    await terminate_then_kill(proc, drain_timeout=0.5)
    proc.terminate.assert_called_once()
    proc.kill.assert_not_called()


@pytest.mark.asyncio
async def test_terminate_then_kill_noop_on_already_dead():
    proc = MagicMock()
    proc.returncode = 0
    proc.terminate = MagicMock()
    proc.kill = MagicMock()
    await terminate_then_kill(proc, drain_timeout=0.5)
    proc.terminate.assert_not_called()
    proc.kill.assert_not_called()