import pytest
from mqtt_home.device_registry import (
    create_device, get_device, list_devices, delete_device,
    update_device, send_command, handle_state_update, get_device_logs,
    get_dashboard_stats,
)
from mqtt_home.schemas import DeviceCreate, DeviceUpdate


async def test_create_and_get_device(db_session):
    data = DeviceCreate(name="客厅灯", type="light", mqtt_topic="home/light")
    device = await create_device(db_session, data)
    assert device.name == "客厅灯"

    fetched = await get_device(db_session, device.id)
    assert fetched is not None
    assert fetched.id == device.id


async def test_list_devices(db_session):
    await create_device(db_session, DeviceCreate(name="设备1", type="switch", mqtt_topic="t1"))
    await create_device(db_session, DeviceCreate(name="设备2", type="sensor", mqtt_topic="t2"))
    devices = await list_devices(db_session)
    assert len(devices) == 2


async def test_update_device(db_session):
    device = await create_device(db_session, DeviceCreate(name="灯", type="light", mqtt_topic="t"))
    updated = await update_device(db_session, device.id, DeviceUpdate(name="新名字"))
    assert updated.name == "新名字"


async def test_delete_device(db_session):
    device = await create_device(db_session, DeviceCreate(name="灯", type="light", mqtt_topic="t"))
    assert await delete_device(db_session, device.id) is True
    assert await get_device(db_session, device.id) is None


async def test_delete_nonexistent_device(db_session):
    assert await delete_device(db_session, "nonexistent") is False


async def test_send_command(db_session):
    device = await create_device(
        db_session, DeviceCreate(name="灯", type="light", mqtt_topic="t", command_topic="t/set")
    )
    published = {}

    async def mock_publish(topic, payload):
        published[topic] = payload

    log = await send_command(db_session, device.id, '{"state":"on"}', mock_publish)
    assert log is not None
    assert log.direction == "tx"
    assert published["t/set"] == '{"state":"on"}'


async def test_send_command_no_command_topic(db_session):
    device = await create_device(db_session, DeviceCreate(name="传感器", type="sensor", mqtt_topic="t"))
    with pytest.raises(ValueError, match="no command_topic"):
        await send_command(db_session, device.id, '{"value":1}')


async def test_handle_state_update(db_session):
    device = await create_device(db_session, DeviceCreate(name="灯", type="light", mqtt_topic="home/light"))
    updated = await handle_state_update(db_session, "home/light", '{"state":"on"}')
    assert updated is not None
    assert updated.state == '{"state":"on"}'
    assert updated.is_online is True


async def test_handle_state_update_unknown_topic(db_session):
    result = await handle_state_update(db_session, "unknown/topic", "on")
    assert result is None


async def test_get_device_logs(db_session):
    device = await create_device(
        db_session, DeviceCreate(name="灯", type="light", mqtt_topic="t", command_topic="t/set")
    )
    async def noop(t, p):
        pass
    await send_command(db_session, device.id, '{"state":"on"}', noop)
    await send_command(db_session, device.id, '{"state":"off"}', noop)

    logs = await get_device_logs(db_session, device.id, limit=10)
    assert len(logs) == 2


async def test_dashboard_stats(db_session):
    await create_device(db_session, DeviceCreate(name="在线设备", type="switch", mqtt_topic="t1"))
    await create_device(db_session, DeviceCreate(name="离线设备", type="sensor", mqtt_topic="t2"))
    await handle_state_update(db_session, "t1", "online")

    stats = await get_dashboard_stats(db_session)
    assert stats["total_devices"] == 2
    assert stats["online_devices"] == 1
    assert stats["offline_devices"] == 1