from __future__ import annotations

import asyncio
import json
import threading
from collections.abc import Mapping
from pathlib import Path
from typing import Any

import pytest
from pydantic import ValidationError

import k1link.web.device_plugin_composition as plugin_composition
from k1link.web.device_plugin_composition import (
    DevicePluginCompositionError,
    InstalledDevicePluginEnvironment,
    load_installed_device_plugins,
)
from k1link.web.plugin_catalog import DevicePluginCatalog
from k1link.web.plugin_runtime import (
    DevicePluginDispatcher,
    DevicePluginRuntimeContribution,
    PluginActionNotFoundError,
    PluginNotFoundError,
)
from k1link.web.xgrids_k1_facade import (
    ACTION_DISCOVERY_SCAN,
    ACTION_NETWORK_PROVISION,
    ACTION_STREAM_START_LIVE,
    ACTION_STREAM_START_REPLAY,
    ACTION_STREAM_STOP,
    ACTION_VIEWER_SETTINGS_UPDATE,
    XGRIDS_K1_PLUGIN_ID,
    ConnectRequest,
    ViewerSettingsRequest,
    XgridsK1PluginFacade,
)


class FakeXgridsService:
    def __init__(self) -> None:
        self.calls: list[tuple[str, object]] = []

    def state(self) -> dict[str, Any]:
        self.calls.append(("state", None))
        return {"phase": "idle"}

    async def scan_ble(self, duration_seconds: float) -> dict[str, Any]:
        self.calls.append(("scan", duration_seconds))
        return {"phase": "idle", "devices": []}

    async def connect(self, request: ConnectRequest) -> dict[str, Any]:
        self.calls.append(("connect", request))
        return {"phase": "connected", "k1_ip": "192.168.1.20"}

    def start_live(self, host: str | None, duration_seconds: float) -> dict[str, Any]:
        self.calls.append(("live", (host, duration_seconds)))
        return {"phase": "live"}

    def start_replay(self, path: str, speed: float, loop: bool) -> dict[str, Any]:
        self.calls.append(("replay", (path, speed, loop)))
        return {"phase": "replay"}

    def stop(self) -> dict[str, Any]:
        self.calls.append(("stop", None))
        return {"phase": "idle"}

    def update_viewer_settings(self, request: ViewerSettingsRequest) -> dict[str, Any]:
        self.calls.append(("viewer", request))
        return {"phase": "idle", "viewer_settings": request.model_dump()}


def test_manifest_and_runtime_facade_declare_identical_actions() -> None:
    repository_root = Path(__file__).resolve().parents[1]
    manifest = next(
        candidate
        for candidate in DevicePluginCatalog(repository_root).manifests()
        if candidate.metadata.id == XGRIDS_K1_PLUGIN_ID
    )

    assert {action.id for action in manifest.spec.actions} == XgridsK1PluginFacade.action_ids


def test_repository_runtime_composition_exactly_matches_catalog() -> None:
    repository_root = Path(__file__).resolve().parents[1]
    environment = load_installed_device_plugins(repository_root)
    try:
        assert set(environment.dispatcher.action_declarations) == {
            manifest.metadata.id for manifest in environment.catalog.manifests()
        }
    finally:
        environment.close()


def test_composition_closes_a_runtime_that_does_not_match_its_manifest(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    repository_root = Path(__file__).resolve().parents[1]
    manifest = next(
        candidate
        for candidate in DevicePluginCatalog(repository_root).manifests()
        if candidate.metadata.id == XGRIDS_K1_PLUGIN_ID
    )
    mismatched_manifest = manifest.model_copy(
        update={"metadata": manifest.metadata.model_copy(update={"id": "example.other-plugin"})}
    )
    closed: list[bool] = []
    contribution = DevicePluginRuntimeContribution(
        adapter=XgridsK1PluginFacade(FakeXgridsService()),
        close=lambda: closed.append(True),
    )
    monkeypatch.setattr(
        plugin_composition,
        "_load_factory",
        lambda _: lambda __: contribution,
    )

    with pytest.raises(DevicePluginCompositionError, match="id mismatch"):
        plugin_composition._load_contribution(repository_root, mismatched_manifest)

    assert closed == [True]


def test_composition_loads_and_dispatches_two_synthetic_plugins(
    monkeypatch: pytest.MonkeyPatch,
    tmp_path: Path,
) -> None:
    class SyntheticAdapter:
        action_ids = frozenset({"state.read"})

        def __init__(self, plugin_id: str) -> None:
            self.plugin_id = plugin_id

        async def invoke(
            self,
            action_id: str,
            payload: Mapping[str, Any],
        ) -> dict[str, Any]:
            assert action_id == "state.read"
            assert payload == {}
            return {"plugin_id": self.plugin_id}

    closed: list[str] = []
    contributions = {
        f"synthetic:{suffix}": DevicePluginRuntimeContribution(
            adapter=SyntheticAdapter(f"example.{suffix}"),
            close=lambda suffix=suffix: closed.append(suffix),
        )
        for suffix in ("first", "second")
    }

    for suffix in ("first", "second"):
        document = {
            "apiVersion": "missioncore.nodedc/v1alpha1",
            "kind": "DevicePlugin",
            "metadata": {
                "id": f"example.{suffix}",
                "version": "0.1.0",
                "displayName": f"Example {suffix}",
            },
            "spec": {
                "hostApiRange": "v1alpha1",
                "runtime": {
                    "backendEntrypoint": f"synthetic:{suffix}",
                    "isolation": "transitional-in-process",
                },
                "permissions": [],
                "actions": [{"id": "state.read", "mutating": False, "secretFields": []}],
                "models": [
                    {
                        "id": f"example.{suffix}-model",
                        "vendor": "Example",
                        "displayName": f"Example {suffix}",
                        "category": "Synthetic",
                        "description": "Synthetic runtime composition fixture.",
                        "verified": False,
                        "capabilities": [],
                        "ui": {
                            "slot": "device.connection",
                            "componentKey": f"example.{suffix}.connection",
                        },
                    }
                ],
            },
        }
        manifest_path = tmp_path / "plugins" / suffix / "plugin.manifest.json"
        manifest_path.parent.mkdir(parents=True)
        manifest_path.write_text(json.dumps(document), encoding="utf-8")

    monkeypatch.setattr(
        plugin_composition,
        "_load_factory",
        lambda entrypoint: lambda _: contributions[entrypoint],
    )
    environment = load_installed_device_plugins(tmp_path)
    try:
        for suffix in ("first", "second"):
            state = asyncio.run(
                environment.dispatcher.invoke(f"example.{suffix}", "state.read", {})
            )
            assert state == {"plugin_id": f"example.{suffix}"}
    finally:
        environment.close()

    assert closed == ["second", "first"]


def test_environment_shutdown_attempts_every_plugin_after_close_failure(
    tmp_path: Path,
) -> None:
    closed: list[str] = []

    def failing_close() -> None:
        closed.append("failing")
        raise RuntimeError("synthetic close failure")

    environment = InstalledDevicePluginEnvironment(
        catalog=DevicePluginCatalog(tmp_path),
        dispatcher=DevicePluginDispatcher([]),
        legacy_routers=(),
        _contributions=(
            DevicePluginRuntimeContribution(
                adapter=XgridsK1PluginFacade(FakeXgridsService()),
                close=lambda: closed.append("healthy"),
            ),
            DevicePluginRuntimeContribution(
                adapter=XgridsK1PluginFacade(FakeXgridsService()),
                close=failing_close,
            ),
        ),
    )

    with pytest.raises(DevicePluginCompositionError, match="failed during shutdown") as raised:
        environment.close()

    assert closed == ["failing", "healthy"]
    assert "synthetic close failure" in " ".join(raised.value.__notes__)


def test_dispatcher_routes_allowlisted_action_to_xgrids_facade() -> None:
    service = FakeXgridsService()
    dispatcher = DevicePluginDispatcher([XgridsK1PluginFacade(service)])

    state = asyncio.run(
        dispatcher.invoke(
            XGRIDS_K1_PLUGIN_ID,
            ACTION_DISCOVERY_SCAN,
            {"duration_seconds": 6},
        )
    )

    assert state == {"phase": "idle", "devices": []}
    assert service.calls == [("scan", 6.0)]


def test_dispatcher_rejects_unknown_plugin_and_action() -> None:
    dispatcher = DevicePluginDispatcher([XgridsK1PluginFacade(FakeXgridsService())])

    with pytest.raises(PluginNotFoundError):
        asyncio.run(dispatcher.invoke("missing.plugin", ACTION_STREAM_STOP, {}))
    with pytest.raises(PluginActionNotFoundError):
        asyncio.run(dispatcher.invoke(XGRIDS_K1_PLUGIN_ID, "unknown.action", {}))


def test_facade_validates_payload_before_calling_service() -> None:
    service = FakeXgridsService()
    dispatcher = DevicePluginDispatcher([XgridsK1PluginFacade(service)])

    with pytest.raises(ValidationError):
        asyncio.run(
            dispatcher.invoke(
                XGRIDS_K1_PLUGIN_ID,
                ACTION_NETWORK_PROVISION,
                {"device_id": "id", "ssid": "network", "password": "secret", "extra": True},
            )
        )

    assert service.calls == []


@pytest.mark.parametrize(
    ("action_id", "payload", "expected_call"),
    [
        (ACTION_STREAM_START_LIVE, {"host": "192.168.1.20"}, "live"),
        (
            ACTION_STREAM_START_REPLAY,
            {"path": "sessions/capture.k1mqtt", "speed": 1, "loop": False},
            "replay",
        ),
        (ACTION_STREAM_STOP, {}, "stop"),
        (
            ACTION_VIEWER_SETTINGS_UPDATE,
            {
                "point_size": 3,
                "color_mode": "height",
                "palette": "viridis",
                "custom_color": "#102030",
                "accumulation_seconds": 12,
                "show_points": True,
                "show_trajectory": True,
                "show_grid": False,
            },
            "viewer",
        ),
    ],
)
def test_facade_preserves_existing_runtime_operations(
    action_id: str,
    payload: dict[str, object],
    expected_call: str,
) -> None:
    service = FakeXgridsService()
    dispatcher = DevicePluginDispatcher([XgridsK1PluginFacade(service)])

    asyncio.run(dispatcher.invoke(XGRIDS_K1_PLUGIN_ID, action_id, payload))

    assert service.calls[0][0] == expected_call


def test_sync_runtime_actions_run_outside_the_api_event_loop() -> None:
    class ThreadAwareService(FakeXgridsService):
        thread_id: int | None = None

        def stop(self) -> dict[str, Any]:
            self.thread_id = threading.get_ident()
            return super().stop()

    service = ThreadAwareService()
    dispatcher = DevicePluginDispatcher([XgridsK1PluginFacade(service)])
    event_loop_thread = threading.get_ident()

    asyncio.run(dispatcher.invoke(XGRIDS_K1_PLUGIN_ID, ACTION_STREAM_STOP, {}))

    assert service.thread_id is not None
    assert service.thread_id != event_loop_thread