"""Tests for settings router endpoints and validation behavior."""

from unittest.mock import AsyncMock, patch

import pytest
from fastapi import HTTPException

from app.models import CONTACT_TYPE_REPEATER, AppSettings, ContactUpsert
from app.repository import AppSettingsRepository, ContactRepository
from app.routers.settings import (
    AppSettingsUpdate,
    FavoriteRequest,
    TrackedTelemetryRequest,
    get_telemetry_schedule,
    toggle_favorite,
    toggle_tracked_telemetry,
    update_settings,
)


class TestUpdateSettings:
    @pytest.mark.asyncio
    async def test_forwards_only_provided_fields(self, test_db):
        result = await update_settings(
            AppSettingsUpdate(
                max_radio_contacts=321,
                advert_interval=3600,
            )
        )

        assert result.max_radio_contacts == 321
        assert result.advert_interval == 3600

    @pytest.mark.asyncio
    async def test_advert_interval_below_minimum_is_clamped_to_one_hour(self, test_db):
        result = await update_settings(AppSettingsUpdate(advert_interval=600))
        assert result.advert_interval == 3600

    @pytest.mark.asyncio
    async def test_advert_interval_zero_stays_disabled(self, test_db):
        result = await update_settings(AppSettingsUpdate(advert_interval=0))
        assert result.advert_interval == 0

    @pytest.mark.asyncio
    async def test_advert_interval_above_minimum_is_preserved(self, test_db):
        result = await update_settings(AppSettingsUpdate(advert_interval=86400))
        assert result.advert_interval == 86400

    @pytest.mark.asyncio
    async def test_empty_patch_returns_current_settings(self, test_db):
        result = await update_settings(AppSettingsUpdate())

        # Should return default settings without error
        assert isinstance(result, AppSettings)
        assert result.max_radio_contacts == 200  # default

    @pytest.mark.asyncio
    async def test_flood_scope_round_trip(self, test_db):
        """Flood scope should be saved and retrieved correctly."""
        result = await update_settings(AppSettingsUpdate(flood_scope="MyRegion"))
        assert result.flood_scope == "#MyRegion"

        fresh = await AppSettingsRepository.get()
        assert fresh.flood_scope == "#MyRegion"

    @pytest.mark.asyncio
    async def test_flood_scope_default_empty(self, test_db):
        """Fresh DB should have flood_scope as empty string."""
        settings = await AppSettingsRepository.get()
        assert settings.flood_scope == ""

    @pytest.mark.asyncio
    async def test_flood_scope_whitespace_stripped(self, test_db):
        """Flood scope should be stripped of whitespace."""
        result = await update_settings(AppSettingsUpdate(flood_scope="  MyRegion  "))
        assert result.flood_scope == "#MyRegion"

    @pytest.mark.asyncio
    async def test_flood_scope_existing_hash_is_not_doubled(self, test_db):
        """Existing leading hash should be preserved for backward compatibility."""
        result = await update_settings(AppSettingsUpdate(flood_scope="#MyRegion"))
        assert result.flood_scope == "#MyRegion"

    @pytest.mark.asyncio
    async def test_flood_scope_applies_to_radio(self, test_db):
        """When radio is connected, setting flood_scope calls set_flood_scope on radio."""
        mock_mc = AsyncMock()
        mock_mc.commands.set_flood_scope = AsyncMock()

        mock_rm = AsyncMock()
        mock_rm.is_connected = True
        mock_rm.meshcore = mock_mc

        from contextlib import asynccontextmanager

        @asynccontextmanager
        async def mock_radio_op(name):
            yield mock_mc

        mock_rm.radio_operation = mock_radio_op

        with patch("app.radio.radio_manager", mock_rm):
            await update_settings(AppSettingsUpdate(flood_scope="TestRegion"))

        mock_mc.commands.set_flood_scope.assert_awaited_once_with("#TestRegion")

    @pytest.mark.asyncio
    async def test_flood_scope_empty_resets_radio(self, test_db):
        """Setting flood_scope to empty calls set_flood_scope("") on radio."""
        # First set a non-empty scope
        await update_settings(AppSettingsUpdate(flood_scope="#TestRegion"))

        mock_mc = AsyncMock()
        mock_mc.commands.set_flood_scope = AsyncMock()

        mock_rm = AsyncMock()
        mock_rm.is_connected = True
        mock_rm.meshcore = mock_mc

        from contextlib import asynccontextmanager

        @asynccontextmanager
        async def mock_radio_op(name):
            yield mock_mc

        mock_rm.radio_operation = mock_radio_op

        with patch("app.radio.radio_manager", mock_rm):
            await update_settings(AppSettingsUpdate(flood_scope=""))

        mock_mc.commands.set_flood_scope.assert_awaited_once_with("")


class TestToggleFavorite:
    @pytest.mark.asyncio
    async def test_adds_when_not_favorited(self, test_db):
        await ContactRepository.upsert(ContactUpsert(public_key="aa" * 32, name="Alice"))
        request = FavoriteRequest(type="contact", id="aa" * 32)
        with (
            patch("app.radio_sync.ensure_contact_on_radio", new_callable=AsyncMock) as mock_sync,
            patch("app.routers.settings.asyncio.create_task") as mock_create_task,
        ):
            mock_create_task.side_effect = lambda coro: coro.close()
            result = await toggle_favorite(request)

        assert result.favorite is True
        assert result.type == "contact"
        assert result.id == "aa" * 32
        mock_sync.assert_called_once_with("aa" * 32, force=True)
        mock_create_task.assert_called_once()

    @pytest.mark.asyncio
    async def test_removes_when_already_favorited(self, test_db):
        await ContactRepository.upsert(ContactUpsert(public_key="aa" * 32, name="Alice"))
        await ContactRepository.set_favorite("aa" * 32, True)

        request = FavoriteRequest(type="contact", id="aa" * 32)
        with (
            patch("app.radio_sync.ensure_contact_on_radio", new_callable=AsyncMock) as mock_sync,
            patch("app.routers.settings.asyncio.create_task") as mock_create_task,
        ):
            mock_create_task.side_effect = lambda coro: coro.close()
            result = await toggle_favorite(request)

        assert result.favorite is False
        mock_sync.assert_not_called()
        mock_create_task.assert_not_called()


class TestToggleTrackedTelemetry:
    """Tests for POST /settings/tracked-telemetry/toggle."""

    async def _create_repeater(self, key: str, name: str = "TestRepeater") -> None:
        await ContactRepository.upsert(
            ContactUpsert(public_key=key, name=name, type=CONTACT_TYPE_REPEATER)
        )

    @pytest.mark.asyncio
    async def test_add_repeater_to_tracking(self, test_db):
        key = "aa" * 32
        await self._create_repeater(key)

        result = await toggle_tracked_telemetry(TrackedTelemetryRequest(public_key=key))

        assert key in result.tracked_telemetry_repeaters
        assert result.names[key] == "TestRepeater"

        # Verify persisted
        settings = await AppSettingsRepository.get()
        assert key in settings.tracked_telemetry_repeaters

    @pytest.mark.asyncio
    async def test_remove_repeater_from_tracking(self, test_db):
        key = "bb" * 32
        await self._create_repeater(key)
        await AppSettingsRepository.update(tracked_telemetry_repeaters=[key])

        result = await toggle_tracked_telemetry(TrackedTelemetryRequest(public_key=key))

        assert key not in result.tracked_telemetry_repeaters

    @pytest.mark.asyncio
    async def test_rejects_non_repeater_contact(self, test_db):
        key = "cc" * 32
        await ContactRepository.upsert(ContactUpsert(public_key=key, name="Client", type=1))

        with pytest.raises(HTTPException) as exc_info:
            await toggle_tracked_telemetry(TrackedTelemetryRequest(public_key=key))
        assert exc_info.value.status_code == 400

    @pytest.mark.asyncio
    async def test_rejects_unknown_contact(self, test_db):
        with pytest.raises(HTTPException) as exc_info:
            await toggle_tracked_telemetry(TrackedTelemetryRequest(public_key="dd" * 32))
        assert exc_info.value.status_code == 404

    @pytest.mark.asyncio
    async def test_rejects_when_limit_reached(self, test_db):
        existing_keys = []
        for i in range(8):
            key = f"{i:02x}" * 32
            await self._create_repeater(key, name=f"Repeater{i}")
            existing_keys.append(key)
        await AppSettingsRepository.update(tracked_telemetry_repeaters=existing_keys)

        new_key = "ff" * 32
        await self._create_repeater(new_key, name="NewRepeater")

        with pytest.raises(HTTPException) as exc_info:
            await toggle_tracked_telemetry(TrackedTelemetryRequest(public_key=new_key))
        assert exc_info.value.status_code == 409
        detail = exc_info.value.detail
        assert len(detail["tracked_telemetry_repeaters"]) == 8

    @pytest.mark.asyncio
    async def test_remove_still_works_when_limit_reached(self, test_db):
        """Toggling OFF an already-tracked repeater should work even at max capacity."""
        keys = []
        for i in range(8):
            key = f"{i:02x}" * 32
            await self._create_repeater(key)
            keys.append(key)
        await AppSettingsRepository.update(tracked_telemetry_repeaters=keys)

        result = await toggle_tracked_telemetry(TrackedTelemetryRequest(public_key=keys[0]))
        assert keys[0] not in result.tracked_telemetry_repeaters
        assert len(result.tracked_telemetry_repeaters) == 7

    @pytest.mark.asyncio
    async def test_toggle_response_includes_schedule(self, test_db):
        """After toggle, response must carry the schedule derivation so the UI
        can update the interval dropdown without a follow-up fetch."""
        key = "aa" * 32
        await self._create_repeater(key)

        result = await toggle_tracked_telemetry(TrackedTelemetryRequest(public_key=key))

        assert result.schedule.tracked_count == 1
        # N=1 unlocks the full menu including 1h
        assert 1 in result.schedule.options
        assert result.schedule.max_tracked == 8


class TestTelemetryIntervalValidation:
    """PATCH /settings validation for telemetry_interval_hours."""

    @pytest.mark.asyncio
    async def test_accepts_valid_interval(self, test_db):
        result = await update_settings(AppSettingsUpdate(telemetry_interval_hours=4))
        assert result.telemetry_interval_hours == 4

    @pytest.mark.asyncio
    async def test_invalid_interval_falls_back_to_default(self, test_db):
        """Non-menu values are defaulted rather than 400-ing to keep stale
        clients from getting stuck on a save error."""
        result = await update_settings(AppSettingsUpdate(telemetry_interval_hours=99))
        assert result.telemetry_interval_hours == 8  # DEFAULT_TELEMETRY_INTERVAL_HOURS

    @pytest.mark.asyncio
    async def test_preference_is_preserved_even_when_illegal_for_count(self, test_db):
        """User picks 1h at N=5 tracked: stored pref must stay 1h. Scheduler
        handles the clamping at run time; storage is verbatim."""
        # Seed 5 tracked repeaters
        keys = [f"{i:02x}" * 32 for i in range(5)]
        for k in keys:
            await ContactRepository.upsert(
                ContactUpsert(public_key=k, name=f"R{k[:4]}", type=CONTACT_TYPE_REPEATER)
            )
        await AppSettingsRepository.update(tracked_telemetry_repeaters=keys)

        result = await update_settings(AppSettingsUpdate(telemetry_interval_hours=1))
        assert result.telemetry_interval_hours == 1

        # But the GET schedule endpoint should report the clamped effective value.
        schedule = await get_telemetry_schedule()
        assert schedule.preferred_hours == 1
        assert schedule.effective_hours == 6  # N=5 -> shortest legal = 6h


class TestTelemetryScheduleEndpoint:
    """GET /settings/tracked-telemetry/schedule."""

    @pytest.mark.asyncio
    async def test_schedule_with_no_tracked_repeaters(self, test_db):
        """No tracked repeaters means nothing to schedule; next_run_at is None.

        At N=0 the clamp helper returns the default 8h, which is a fine
        display value for an empty state. Options start at 8h for the same
        reason — any lower shortest-legal only makes sense once the user
        has at least one repeater tracked.
        """
        schedule = await get_telemetry_schedule()

        assert schedule.tracked_count == 0
        assert schedule.next_run_at is None
        # At N=0 shortest-legal defaults to 8h.
        assert schedule.options == [8, 12, 24]

    @pytest.mark.asyncio
    async def test_schedule_filters_options_by_tracked_count(self, test_db):
        keys = [f"{i:02x}" * 32 for i in range(5)]
        for k in keys:
            await ContactRepository.upsert(
                ContactUpsert(public_key=k, name=f"R{k[:4]}", type=CONTACT_TYPE_REPEATER)
            )
        await AppSettingsRepository.update(tracked_telemetry_repeaters=keys)

        schedule = await get_telemetry_schedule()

        assert schedule.tracked_count == 5
        assert schedule.options == [6, 8, 12, 24]
        assert schedule.next_run_at is not None