import os
import sys
from pathlib import Path

# Prefer src/models; pytest may have registered tests/models as top-level ``models``.
_src = Path(__file__).resolve().parents[2] / "src"
_sp = str(_src)
if _sp in sys.path:
    sys.path.remove(_sp)
sys.path.insert(0, _sp)
_m = sys.modules.get("models")
if _m is not None:
    mf = (getattr(_m, "__file__", "") or "").replace("\\", "/")
    if "/tests/models" in mf:
        del sys.modules["models"]

from models.device import Device


def _fresh_device():
    """New empty device DB and new Device singleton (tests only)."""
    db_dir = os.path.join(
        os.path.dirname(os.path.dirname(os.path.dirname(__file__))), "db"
    )
    device_file = os.path.join(db_dir, "device.json")
    if os.path.exists(device_file):
        os.remove(device_file)
    if hasattr(Device, "_instance"):
        del Device._instance
    return Device()


def test_device():
    """Test Device model CRUD operations (id = MAC)."""
    devices = _fresh_device()

    mac = "aabbccddeeff"
    print("Testing create device")
    device_id = devices.create("Test Device", address="aa:bb:cc:dd:ee:ff", default_pattern="on", tabs=["1", "2"])
    print(f"Created device with ID: {device_id}")
    assert device_id == mac
    assert device_id in devices

    print("\nTesting read device")
    device = devices.read(device_id)
    print(f"Read: {device}")
    assert device is not None
    assert device["id"] == mac
    assert device["name"] == "Test Device"
    assert device["type"] == "led"
    assert device["transport"] == "espnow"
    assert device["address"] == mac
    assert device["default_pattern"] == "on"
    assert device["tabs"] == ["1", "2"]

    print("\nTesting read by colon MAC")
    assert devices.read("aa:bb:cc:dd:ee:ff")["id"] == mac

    print("\nTesting address normalization on update (espnow keeps MAC as address)")
    devices.update(device_id, {"address": "11:22:33:44:55:66"})
    updated = devices.read(device_id)
    assert updated["address"] == mac

    print("\nTesting update device fields")
    update_data = {
        "name": "Updated Device",
        "default_pattern": "rainbow",
        "tabs": ["1", "2", "3"],
    }
    result = devices.update(device_id, update_data)
    assert result is True
    updated = devices.read(device_id)
    assert updated["name"] == "Updated Device"
    assert updated["default_pattern"] == "rainbow"
    assert len(updated["tabs"]) == 3

    print("\nTesting list devices")
    device_list = devices.list()
    print(f"Device list: {device_list}")
    assert mac in device_list

    print("\nTesting delete device")
    deleted = devices.delete(device_id)
    assert deleted is True
    assert mac not in devices

    print("\nTesting read after delete")
    device = devices.read(device_id)
    assert device is None

    print("\nAll device tests passed!")


def test_upsert_wifi_tcp_client():
    devices = _fresh_device()
    assert devices.upsert_wifi_tcp_client("", "192.168.1.10", None) is None
    assert devices.upsert_wifi_tcp_client("kitchen", "192.168.1.20", "bad") is None

    m1 = "001122334455"
    m2 = "001122334466"
    i1 = devices.upsert_wifi_tcp_client("kitchen", "192.168.1.20", m1)
    assert i1 == m1
    d = devices.read(i1)
    assert d["name"] == "kitchen"
    assert d["transport"] == "wifi"
    assert d["address"] == "192.168.1.20"

    i2 = devices.upsert_wifi_tcp_client("kitchen", "192.168.1.21", m2)
    assert i2 == m2
    assert devices.read(m1)["address"] == "192.168.1.20"
    assert devices.read(m2)["address"] == "192.168.1.21"
    assert devices.read(m1)["name"] == devices.read(m2)["name"] == "kitchen"

    again = devices.upsert_wifi_tcp_client("kitchen", "192.168.1.99", m1)
    assert again == m1
    assert devices.read(m1)["address"] == "192.168.1.99"

    i3 = devices.upsert_wifi_tcp_client("hall", "10.0.0.5", "deadbeefcafe")
    assert i3 == "deadbeefcafe"
    assert len(devices.list()) == 3


def test_device_can_change_address():
    devices = _fresh_device()
    m = "feedfacec0de"
    did = devices.create("mover", mac=m, address="192.168.1.1", transport="wifi")
    assert did == m
    devices.update(did, {"address": "10.0.0.99"})
    assert devices.read(did)["address"] == "10.0.0.99"


def test_device_duplicate_names_allowed():
    devices = _fresh_device()
    a1 = devices.create("alpha", address="aa:bb:cc:dd:ee:ff")
    a2 = devices.create("alpha", address="11:22:33:44:55:66")
    assert a1 != a2
    assert devices.read(a1)["name"] == devices.read(a2)["name"] == "alpha"


def test_device_duplicate_mac_rejected():
    devices = _fresh_device()
    devices.create("one", address="aa:bb:cc:dd:ee:ff")
    try:
        devices.create("two", address="aa-bb-cc-dd-ee-ff")
        assert False, "expected ValueError"
    except ValueError as e:
        assert "already exists" in str(e).lower()


if __name__ == "__main__":
    test_device()
    test_upsert_wifi_tcp_client()
    test_device_can_change_address()
    test_device_duplicate_names_allowed()
    test_device_duplicate_mac_rejected()