"""
Pytest fixtures for Controller tests.
"""
import asyncio
import copy
import tempfile
from pathlib import Path
from typing import Generator
from unittest import mock

import pytest
from fastapi.testclient import TestClient

from controller.defaults import DEFAULT_CONFIG


_FAKE_CACHED_STATUS = {
    "cpu_stats": {
        "percent": 0.0, "cores": 1,
        "cur_frequency": 0, "max_frequency": 0, "min_frequency": 0,
        "temperature": None, "high_temperature": None, "critical_temperature": None,
    },
    "memory_stats": {"total": 1, "used": 0, "free": 1, "cached": 0},
    "load_stats": {"minute_1": "0.00", "minute_5": "0.00", "minute_15": "0.00"},
    "drives_stats": [],
    "nic_bandwidth_stats": {},
    "power_stats": {"under_voltage": False, "over_current": False},
    "iostat_stats": {"percent_iowait": None},
    "processes_stats": [],
    "disk_bandwidth_stats": {},
    "uptime_stats": {"uptime_seconds": 0},
    "smart_stats": {"drives": [], "high_temperature": 55, "critical_temperature": 65},
    "last_status": "1970-01-01T00:00:00",
}


async def _noop_status_worker(app, base_sleep: float = 5.0):
    """Replacement for status_worker_loop during tests.

    The real worker calls blocking samplers (psutil with interval=1.0, iostat)
    via asyncio.to_thread; those threads can't be cancelled, so TestClient
    teardown waits ~2s for each test. Also pre-populates cached_status so the
    dashboard route doesn't fall back to direct sampling on the request path.
    """
    app.state.cached_status = dict(_FAKE_CACHED_STATUS)
    try:
        await asyncio.Event().wait()
    except asyncio.CancelledError:
        raise


@pytest.fixture(autouse=True)
def _isolate_media_directory(tmp_path_factory, monkeypatch):
    """Point the media directory at an empty temp dir so tests never read a real
    /media/wrolpi (e.g. hotspot settings from wrolpi.yaml)."""
    media_dir = tmp_path_factory.mktemp("media")
    monkeypatch.setenv("MEDIA_DIRECTORY", str(media_dir))


@pytest.fixture(autouse=True)
def _isolate_dnsmasq_include(tmp_path_factory, monkeypatch):
    """Point the captive-portal dnsmasq include at a temp file so tests never write /etc."""
    import controller.lib.captive_portal as captive_portal
    include = tmp_path_factory.mktemp("dnsmasq") / "50-wrolpi-captive-portal.conf"
    monkeypatch.setattr(captive_portal, "INCLUDE_FILE", include)
    # Portal acknowledgements are process state; every test starts with none.
    captive_portal.reset_acknowledged_clients()


@pytest.fixture(autouse=True)
def _patch_status_worker():
    """Replace the real status worker with a no-op for every test.

    See _noop_status_worker for why this is necessary.
    """
    with mock.patch("controller.main.status_worker_loop", _noop_status_worker):
        yield


@pytest.fixture
def test_directory() -> Generator[Path, None, None]:
    """Create a temporary directory for testing."""
    with tempfile.TemporaryDirectory() as tmp_dir:
        tmp_path = Path(tmp_dir).resolve()
        tmp_path.chmod(0o40755)
        yield tmp_path


@pytest.fixture
def test_config_directory(test_directory: Path) -> Path:
    """Create a config directory inside test_directory."""
    config_dir = test_directory / "config"
    config_dir.mkdir(parents=True, exist_ok=True)
    return config_dir


@pytest.fixture
def mock_config_path(test_config_directory: Path):
    """Mock the CONFIG_PATH_ON_DRIVE to use test directory."""
    config_path = test_config_directory / "controller.yaml"
    with mock.patch("controller.lib.config.CONFIG_PATH_ON_DRIVE", config_path):
        yield config_path


@pytest.fixture
def reset_runtime_config():
    """Reset the runtime config to defaults before and after each test."""
    import controller.lib.config as config_module

    # Save original
    original = copy.deepcopy(config_module._runtime_config)

    # Reset to defaults
    config_module._runtime_config = copy.deepcopy(DEFAULT_CONFIG)

    yield

    # Restore original
    config_module._runtime_config = original


@pytest.fixture
def mock_docker_mode():
    """Mock Docker mode to be disabled."""
    with mock.patch.dict("os.environ", {"DOCKERIZED": "false"}):
        yield


@pytest.fixture
def mock_docker_mode_enabled():
    """Mock Docker mode to be enabled."""
    with mock.patch.dict("os.environ", {"DOCKERIZED": "true"}):
        yield


@pytest.fixture
def mock_drive_mounted(test_config_directory: Path):
    """Mock the primary drive as mounted by creating config directory."""
    # test_config_directory fixture already creates it
    with mock.patch(
            "controller.lib.config.is_primary_drive_mounted", return_value=True
    ):
        yield test_config_directory


@pytest.fixture
def mock_drive_not_mounted():
    """Mock the primary drive as not mounted."""
    with mock.patch(
            "controller.lib.config.is_primary_drive_mounted", return_value=False
    ):
        yield


@pytest.fixture
def test_client(reset_runtime_config, mock_docker_mode) -> TestClient:
    """Create a FastAPI TestClient for integration testing."""
    from controller.main import app

    with TestClient(app) as client:
        yield client


@pytest.fixture
def test_client_docker_mode(reset_runtime_config, mock_docker_mode_enabled) -> TestClient:
    """Create a FastAPI TestClient with Docker mode enabled."""
    from controller.main import app

    with TestClient(app) as client:
        yield client