"""Tests for DeviceStore — device CRUD, persistence, name uniqueness, thread safety."""

from concurrent.futures import ThreadPoolExecutor, as_completed
from pathlib import Path

import pytest

from wled_controller.storage.device_store import Device, DeviceStore


# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------


@pytest.fixture
def temp_storage(tmp_path) -> Path:
    return tmp_path / "devices.json"


@pytest.fixture
def store(temp_storage) -> DeviceStore:
    return DeviceStore(temp_storage)


# ---------------------------------------------------------------------------
# Device model
# ---------------------------------------------------------------------------


class TestDeviceModel:
    def test_creation_defaults(self):
        d = Device(device_id="d1", name="D", url="http://1.2.3.4", led_count=100)
        assert d.id == "d1"
        assert d.enabled is True
        assert d.device_type == "wled"
        assert d.software_brightness == 255
        assert d.rgbw is False
        assert d.zone_mode == "combined"
        assert d.tags == []

    def test_creation_with_all_fields(self):
        d = Device(
            device_id="d2",
            name="Full",
            url="http://1.2.3.4",
            led_count=300,
            enabled=False,
            device_type="adalight",
            baud_rate=115200,
            software_brightness=128,
            auto_shutdown=True,
            send_latency_ms=10,
            rgbw=True,
            zone_mode="individual",
            tags=["living", "tv"],
            dmx_protocol="sacn",
            dmx_start_universe=1,
            dmx_start_channel=5,
        )
        assert d.enabled is False
        assert d.baud_rate == 115200
        assert d.rgbw is True
        assert d.tags == ["living", "tv"]
        assert d.dmx_protocol == "sacn"

    def test_to_dict_round_trip(self):
        original = Device(
            device_id="rt1",
            name="RoundTrip",
            url="http://10.0.0.1",
            led_count=60,
            rgbw=True,
            tags=["test"],
        )
        data = original.to_dict()
        restored = Device.from_dict(data)

        assert restored.id == original.id
        assert restored.name == original.name
        assert restored.url == original.url
        assert restored.led_count == original.led_count
        assert restored.rgbw == original.rgbw
        assert restored.tags == original.tags

    def test_to_dict_omits_defaults(self):
        """Fields at their default value should be omitted from to_dict for compactness."""
        d = Device(device_id="d", name="D", url="http://x", led_count=10)
        data = d.to_dict()
        assert "baud_rate" not in data
        assert "rgbw" not in data
        assert "tags" not in data

    def test_to_dict_includes_non_defaults(self):
        d = Device(
            device_id="d", name="D", url="http://x", led_count=10,
            rgbw=True, tags=["a"], software_brightness=100,
        )
        data = d.to_dict()
        assert data["rgbw"] is True
        assert data["tags"] == ["a"]
        assert data["software_brightness"] == 100

    def test_from_dict_missing_optional_fields(self):
        """from_dict should handle minimal data gracefully."""
        data = {"id": "m1", "name": "Minimal", "url": "http://x", "led_count": 10}
        d = Device.from_dict(data)
        assert d.enabled is True
        assert d.device_type == "wled"
        assert d.tags == []


# ---------------------------------------------------------------------------
# DeviceStore CRUD
# ---------------------------------------------------------------------------


class TestDeviceStoreCRUD:
    def test_init_empty(self, store):
        assert store.count() == 0

    def test_create_device(self, store):
        d = store.create_device(name="Test", url="http://1.2.3.4", led_count=100)
        assert d.id.startswith("device_")
        assert d.name == "Test"
        assert store.count() == 1

    def test_create_device_with_options(self, store):
        d = store.create_device(
            name="Full",
            url="http://1.2.3.4",
            led_count=200,
            device_type="adalight",
            baud_rate=115200,
            auto_shutdown=True,
            rgbw=True,
            tags=["bedroom"],
        )
        assert d.device_type == "adalight"
        assert d.baud_rate == 115200
        assert d.auto_shutdown is True
        assert d.rgbw is True
        assert d.tags == ["bedroom"]

    def test_create_mock_device_url(self, store):
        d = store.create_device(
            name="MockDev", url="http://whatever", led_count=10, device_type="mock"
        )
        assert d.url.startswith("mock://")

    def test_get_device(self, store):
        created = store.create_device(name="Get", url="http://x", led_count=50)
        got = store.get_device(created.id)
        assert got.name == "Get"
        assert got.led_count == 50

    def test_get_device_not_found(self, store):
        with pytest.raises(ValueError, match="not found"):
            store.get_device("no_such_id")

    def test_get_all_devices(self, store):
        store.create_device("A", "http://a", 10)
        store.create_device("B", "http://b", 20)
        all_devices = store.get_all_devices()
        assert len(all_devices) == 2
        names = {d.name for d in all_devices}
        assert names == {"A", "B"}

    def test_update_device(self, store):
        d = store.create_device(name="Old", url="http://x", led_count=100)
        updated = store.update_device(d.id, name="New", led_count=200)
        assert updated.name == "New"
        assert updated.led_count == 200
        assert updated.id == d.id

    def test_update_device_ignores_none(self, store):
        d = store.create_device(name="Keep", url="http://x", led_count=100)
        updated = store.update_device(d.id, name=None, led_count=200)
        assert updated.name == "Keep"
        assert updated.led_count == 200

    def test_update_device_ignores_unknown_fields(self, store):
        d = store.create_device(name="Unk", url="http://x", led_count=100)
        updated = store.update_device(d.id, bogus_field="ignored")
        assert updated.name == "Unk"

    def test_update_device_not_found(self, store):
        with pytest.raises(ValueError, match="not found"):
            store.update_device("missing", name="X")

    def test_delete_device(self, store):
        d = store.create_device(name="Del", url="http://x", led_count=50)
        store.delete_device(d.id)
        assert store.count() == 0
        with pytest.raises(ValueError, match="not found"):
            store.get_device(d.id)

    def test_delete_device_not_found(self, store):
        with pytest.raises(ValueError, match="not found"):
            store.delete_device("missing")

    def test_device_exists(self, store):
        d = store.create_device(name="E", url="http://x", led_count=10)
        assert store.device_exists(d.id) is True
        assert store.device_exists("nope") is False

    def test_clear(self, store):
        store.create_device("A", "http://a", 10)
        store.create_device("B", "http://b", 20)
        store.clear()
        assert store.count() == 0


# ---------------------------------------------------------------------------
# Name uniqueness
# ---------------------------------------------------------------------------


class TestDeviceNameUniqueness:
    def test_duplicate_name_on_create(self, store):
        store.create_device(name="Same", url="http://a", led_count=10)
        with pytest.raises(ValueError, match="already exists"):
            store.create_device(name="Same", url="http://b", led_count=10)

    def test_duplicate_name_on_update(self, store):
        store.create_device(name="First", url="http://a", led_count=10)
        d2 = store.create_device(name="Second", url="http://b", led_count=10)
        with pytest.raises(ValueError, match="already exists"):
            store.update_device(d2.id, name="First")

    def test_rename_to_own_name_ok(self, store):
        d = store.create_device(name="Self", url="http://a", led_count=10)
        updated = store.update_device(d.id, name="Self", led_count=99)
        assert updated.led_count == 99


# ---------------------------------------------------------------------------
# Persistence
# ---------------------------------------------------------------------------


class TestDevicePersistence:
    def test_persistence_across_instances(self, temp_storage):
        s1 = DeviceStore(temp_storage)
        d = s1.create_device(name="Persist", url="http://p", led_count=77)
        did = d.id

        s2 = DeviceStore(temp_storage)
        loaded = s2.get_device(did)
        assert loaded.name == "Persist"
        assert loaded.led_count == 77

    def test_update_persists(self, temp_storage):
        s1 = DeviceStore(temp_storage)
        d = s1.create_device(name="Before", url="http://x", led_count=10)
        s1.update_device(d.id, name="After")

        s2 = DeviceStore(temp_storage)
        assert s2.get_device(d.id).name == "After"


# ---------------------------------------------------------------------------
# Thread safety
# ---------------------------------------------------------------------------


class TestDeviceThreadSafety:
    def test_concurrent_creates(self, tmp_path):
        s = DeviceStore(tmp_path / "conc.json")
        errors = []

        def _create(i):
            try:
                s.create_device(name=f"Dev {i}", url=f"http://{i}", led_count=10)
            except Exception as e:
                errors.append(e)

        with ThreadPoolExecutor(max_workers=8) as pool:
            futures = [pool.submit(_create, i) for i in range(25)]
            for f in as_completed(futures):
                f.result()

        assert len(errors) == 0
        assert s.count() == 25