"""Tests for the auto-drying feature in the print scheduler.

Covers:
- Conservative drying parameter selection (mixed filaments)
- Drying preset loading (user-configured vs defaults)
- Auto-drying lifecycle: start, humidity stop, minimum drying time
- Auto-drying stop conditions: feature disabled, no scheduled items, per-printer
- Sync drying state after restart
"""

import time
from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from backend.app.services.print_scheduler import PrintScheduler


class TestConservativeDryingParams:
    """Test _get_conservative_drying_params — picks safest temp/duration for mixed filaments."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    def test_single_filament_pla(self, scheduler):
        """Single PLA tray uses PLA preset."""
        trays = [{"tray_type": "PLA"}]
        presets = PrintScheduler.DEFAULT_DRYING_PRESETS
        result = scheduler._get_conservative_drying_params(trays, "n3f", presets)
        assert result == (45, 12, "PLA")

    def test_mixed_filaments_lowest_temp(self, scheduler):
        """Mixed PLA + ABS: should use PLA's 45°C (lowest), ABS's 12h (longest for n3f)."""
        trays = [{"tray_type": "PLA"}, {"tray_type": "ABS"}]
        presets = PrintScheduler.DEFAULT_DRYING_PRESETS
        result = scheduler._get_conservative_drying_params(trays, "n3f", presets)
        temp, hours, _ = result
        assert temp == 45  # PLA is lowest
        assert hours == 12

    def test_mixed_filaments_longest_duration(self, scheduler):
        """Mixed ABS (8h) + PVA (18h) on n3s: should use longest duration."""
        trays = [{"tray_type": "ABS"}, {"tray_type": "PVA"}]
        presets = PrintScheduler.DEFAULT_DRYING_PRESETS
        result = scheduler._get_conservative_drying_params(trays, "n3s", presets)
        temp, hours, _ = result
        assert temp == 80  # ABS n3s=80, PVA n3s=85 → lowest=80
        assert hours == 18  # ABS n3s_hours=8, PVA n3s_hours=18 → longest=18

    def test_empty_trays_returns_none(self, scheduler):
        """No loaded trays returns None."""
        result = scheduler._get_conservative_drying_params([], "n3f", PrintScheduler.DEFAULT_DRYING_PRESETS)
        assert result is None

    def test_unknown_filament_skipped(self, scheduler):
        """Unknown filament types are ignored."""
        trays = [{"tray_type": "EXOTIC_WOOD"}]
        result = scheduler._get_conservative_drying_params(trays, "n3f", PrintScheduler.DEFAULT_DRYING_PRESETS)
        assert result is None

    def test_filament_type_normalization(self, scheduler):
        """'PLA Basic' should normalize to 'PLA'."""
        trays = [{"tray_type": "PLA Basic"}]
        presets = PrintScheduler.DEFAULT_DRYING_PRESETS
        result = scheduler._get_conservative_drying_params(trays, "n3f", presets)
        assert result is not None
        assert result[0] == 45  # PLA temp

    def test_empty_tray_type_skipped(self, scheduler):
        """Trays with empty tray_type are skipped."""
        trays = [{"tray_type": ""}, {"tray_type": "PETG"}]
        presets = PrintScheduler.DEFAULT_DRYING_PRESETS
        result = scheduler._get_conservative_drying_params(trays, "n3f", presets)
        assert result is not None
        assert result[2] == "PETG"

    def test_n3s_uses_n3s_keys(self, scheduler):
        """AMS-HT (n3s) should use n3s temp and n3s_hours."""
        trays = [{"tray_type": "TPU"}]
        presets = PrintScheduler.DEFAULT_DRYING_PRESETS
        result = scheduler._get_conservative_drying_params(trays, "n3s", presets)
        assert result == (75, 18, "TPU")  # n3s=75, n3s_hours=18

    def test_n3f_uses_n3f_keys(self, scheduler):
        """AMS 2 Pro (n3f) should use n3f temp and n3f_hours."""
        trays = [{"tray_type": "TPU"}]
        presets = PrintScheduler.DEFAULT_DRYING_PRESETS
        result = scheduler._get_conservative_drying_params(trays, "n3f", presets)
        assert result == (65, 12, "TPU")  # n3f=65, n3f_hours=12

    def test_custom_presets(self, scheduler):
        """Custom presets override defaults."""
        trays = [{"tray_type": "PLA"}]
        custom = {"PLA": {"n3f": 50, "n3s": 50, "n3f_hours": 6, "n3s_hours": 6}}
        result = scheduler._get_conservative_drying_params(trays, "n3f", custom)
        assert result == (50, 6, "PLA")


class TestDryingPresets:
    """Test _get_drying_presets — loads user presets from DB or falls back to defaults."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @pytest.mark.asyncio
    async def test_default_presets_when_no_setting(self, scheduler):
        """Returns built-in defaults when no DB setting exists."""
        db = AsyncMock()
        result_mock = MagicMock()
        result_mock.scalar_one_or_none.return_value = None
        db.execute = AsyncMock(return_value=result_mock)

        presets = await scheduler._get_drying_presets(db)
        assert presets == PrintScheduler.DEFAULT_DRYING_PRESETS

    @pytest.mark.asyncio
    async def test_user_presets_from_db(self, scheduler):
        """Returns user-configured presets when saved in DB."""
        db = AsyncMock()
        setting = MagicMock()
        setting.value = '{"PLA": {"n3f": 50, "n3s": 50, "n3f_hours": 6, "n3s_hours": 6}}'
        result_mock = MagicMock()
        result_mock.scalar_one_or_none.return_value = setting
        db.execute = AsyncMock(return_value=result_mock)

        presets = await scheduler._get_drying_presets(db)
        assert presets["PLA"]["n3f"] == 50

    @pytest.mark.asyncio
    async def test_invalid_json_falls_back(self, scheduler):
        """Invalid JSON in DB falls back to defaults."""
        db = AsyncMock()
        setting = MagicMock()
        setting.value = "not valid json{{"
        result_mock = MagicMock()
        result_mock.scalar_one_or_none.return_value = setting
        db.execute = AsyncMock(return_value=result_mock)

        presets = await scheduler._get_drying_presets(db)
        assert presets == PrintScheduler.DEFAULT_DRYING_PRESETS

    @pytest.mark.asyncio
    async def test_empty_string_falls_back(self, scheduler):
        """Empty string in DB falls back to defaults."""
        db = AsyncMock()
        setting = MagicMock()
        setting.value = ""
        result_mock = MagicMock()
        result_mock.scalar_one_or_none.return_value = setting
        db.execute = AsyncMock(return_value=result_mock)

        presets = await scheduler._get_drying_presets(db)
        assert presets == PrintScheduler.DEFAULT_DRYING_PRESETS


class TestSyncDryingState:
    """Test _sync_drying_state — syncs in-memory state with actual printer status."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @patch("backend.app.services.print_scheduler.printer_manager")
    def test_removes_stopped_printers(self, mock_pm, scheduler):
        """Printers that stopped drying are removed from tracking."""
        scheduler._drying_in_progress = {1: time.monotonic()}
        state = MagicMock()
        state.raw_data = {"ams": [{"dry_time": 0}]}
        mock_pm.get_status.return_value = state

        scheduler._sync_drying_state()
        assert 1 not in scheduler._drying_in_progress

    @patch("backend.app.services.print_scheduler.printer_manager")
    def test_keeps_active_printers(self, mock_pm, scheduler):
        """Printers still drying remain in tracking."""
        ts = time.monotonic()
        scheduler._drying_in_progress = {1: ts}
        state = MagicMock()
        state.raw_data = {"ams": [{"dry_time": 120}]}
        mock_pm.get_status.return_value = state

        scheduler._sync_drying_state()
        assert scheduler._drying_in_progress[1] == ts

    @patch("backend.app.services.print_scheduler.printer_manager")
    def test_removes_disconnected_printers(self, mock_pm, scheduler):
        """Disconnected printers are removed from tracking."""
        scheduler._drying_in_progress = {1: time.monotonic()}
        mock_pm.get_status.return_value = None

        scheduler._sync_drying_state()
        assert 1 not in scheduler._drying_in_progress


class TestStopDrying:
    """Test _stop_drying — sends stop commands and clears tracking."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_stops_all_ams_units(self, mock_pm, scheduler):
        """Sends stop command to each AMS unit that is drying."""
        scheduler._drying_in_progress = {1: time.monotonic()}
        state = MagicMock()
        state.raw_data = {
            "ams": [
                {"id": 0, "dry_time": 120},
                {"id": 1, "dry_time": 0},
                {"id": 128, "dry_time": 60},
            ]
        }
        mock_pm.get_status.return_value = state

        await scheduler._stop_drying(1)

        # Should send stop to AMS 0 and 128, not AMS 1
        calls = mock_pm.send_drying_command.call_args_list
        assert len(calls) == 2
        assert calls[0].args == (1, 0, 0, 0)
        assert calls[1].args == (1, 128, 0, 0)
        assert 1 not in scheduler._drying_in_progress

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_clears_tracking_when_no_state(self, mock_pm, scheduler):
        """Clears tracking when printer has no state (disconnected)."""
        scheduler._drying_in_progress = {1: time.monotonic()}
        mock_pm.get_status.return_value = None

        await scheduler._stop_drying(1)
        assert 1 not in scheduler._drying_in_progress


class TestMinimumDryingTime:
    """Regression #1892: a running drying cycle must never be stopped by a humidity re-check.

    Relative humidity reads low in heated air (the AMS sensor sees ~15-20% within
    minutes of the dryer starting even while the filament is still saturated), so a
    humidity-based auto-stop would truncate every cycle — manual or Bambuddy-started —
    to the old minimum-time floor. Drying is now left to run to its configured
    duration; the firmware stops it when the duration elapses.
    """

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_no_stop_before_minimum_time(self, mock_sd, mock_pm, scheduler):
        """Drying should NOT stop when humidity drops below threshold shortly after start."""
        # Simulate: drying started 5 minutes ago
        scheduler._drying_in_progress = {1: time.monotonic() - 300}

        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 600,
                    "humidity_raw": "18",
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PLA"}],
                }
            ]
        }
        state.firmware_version = "01.09.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "X1C"

        # Mock _is_printer_idle and DB
        scheduler._is_printer_idle = MagicMock(return_value=True)
        db = AsyncMock()

        # Mock settings: enabled, threshold=21
        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("21"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns, printer_id=1))

        # Queue item with schedule
        item = MagicMock()
        item.printer_id = 1
        item.scheduled_time = MagicMock()  # Has a schedule
        item.manual_start = False

        await scheduler._check_auto_drying(db, [item], set())

        # Should NOT have sent stop command via humidity check — minimum time not elapsed
        # The only calls should NOT include the humidity-based stop
        for call in mock_pm.send_drying_command.call_args_list:
            # If any stop was called, it should NOT be from the humidity path
            # (humidity path uses keyword args: temp=0, duration=0, mode=0)
            assert call != ((1, 0), {"temp": 0, "duration": 0, "mode": 0}), (
                "Humidity-based stop should not fire before minimum drying time"
            )

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_no_stop_after_long_elapsed_time(self, mock_sd, mock_pm, scheduler):
        """#1892: drying must NOT stop even long after start with low humidity — let it run."""
        # Simulate: drying started 35 minutes ago, humidity reads low (heated air)
        scheduler._drying_in_progress = {1: time.monotonic() - 2100}

        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 600,
                    "humidity_raw": "18",
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PLA"}],
                }
            ]
        }
        state.firmware_version = "01.09.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "X1C"

        scheduler._is_printer_idle = MagicMock(return_value=True)
        db = AsyncMock()

        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("21"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns, printer_id=1))

        item = MagicMock()
        item.printer_id = 1
        item.scheduled_time = MagicMock()
        item.manual_start = False

        await scheduler._check_auto_drying(db, [item], set())

        # Must NOT send a humidity-based stop — drying is left to run to its duration
        for call in mock_pm.send_drying_command.call_args_list:
            assert call != ((1, 0), {"temp": 0, "duration": 0, "mode": 0}), (
                "Humidity re-check must never stop a running drying cycle (#1892)"
            )

    @staticmethod
    def _make_setting(value):
        s = MagicMock()
        s.value = value
        return s

    @staticmethod
    def _make_db_side_effect(settings_map, printer_id=1):
        """Create a side_effect for db.execute that returns settings and printers."""

        async def side_effect(stmt):
            result = MagicMock()
            stmt_str = str(stmt)

            # Extract bind parameter values (SQLAlchemy uses :key_1 placeholders)
            try:
                compiled = stmt.compile(compile_kwargs={"literal_binds": False})
                param_values = list(compiled.params.values())
            except Exception:
                param_values = []

            # Match settings queries by checking bind parameter values
            matched = False
            for key, val in settings_map.items():
                if key in param_values:
                    result.scalar_one_or_none.return_value = val
                    matched = True
                    break

            if not matched:
                if "printer" in stmt_str.lower() or "is_active" in stmt_str:
                    printer = MagicMock()
                    printer.id = printer_id
                    printer.is_active = True
                    scalars_mock = MagicMock()
                    scalars_mock.__iter__ = MagicMock(return_value=iter([printer]))
                    result.scalars.return_value = scalars_mock
                else:
                    result.scalar_one_or_none.return_value = None
            return result

        return side_effect


class TestAutoStopOnFeatureDisabled:
    """Regression: disabling auto-drying in settings should stop active drying sessions."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_stops_drying_when_disabled(self, mock_pm, scheduler):
        """Disabling auto-drying should send stop commands to all drying printers."""
        scheduler._drying_in_progress = {1: time.monotonic(), 2: time.monotonic()}

        # Printer 1: drying, Printer 2: drying
        def get_status(pid):
            state = MagicMock()
            state.raw_data = {"ams": [{"id": 0, "dry_time": 120}]}
            return state

        mock_pm.get_status.side_effect = get_status

        db = AsyncMock()
        # queue_drying_enabled = false
        setting = MagicMock()
        setting.value = "false"
        result_mock = MagicMock()
        result_mock.scalar_one_or_none.return_value = setting
        db.execute = AsyncMock(return_value=result_mock)

        await scheduler._check_auto_drying(db, [], set())

        # Should have sent stop commands
        assert mock_pm.send_drying_command.call_count == 2
        assert not scheduler._drying_in_progress


class TestAutoStopOnNoScheduledItems:
    """Regression: removing scheduled items should stop auto-drying."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @staticmethod
    def _make_setting(value):
        s = MagicMock()
        s.value = value
        return s

    @staticmethod
    def _make_db_side_effect(settings_map):
        """Create a side_effect for db.execute that returns settings by key."""

        async def side_effect(stmt):
            result = MagicMock()
            try:
                compiled = stmt.compile(compile_kwargs={"literal_binds": False})
                param_values = list(compiled.params.values())
            except Exception:
                param_values = []

            for key, val in settings_map.items():
                if key in param_values:
                    result.scalar_one_or_none.return_value = val
                    return result

            result.scalar_one_or_none.return_value = None
            return result

        return side_effect

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_stops_when_no_scheduled_items(self, mock_pm, scheduler):
        """Auto-drying stops when queue has no scheduled items (queue mode only)."""
        scheduler._drying_in_progress = {1: time.monotonic()}

        state = MagicMock()
        state.raw_data = {"ams": [{"id": 0, "dry_time": 120}]}
        mock_pm.get_status.return_value = state

        db = AsyncMock()
        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        # Manual-start items only (no scheduled_time)
        item = MagicMock()
        item.printer_id = 1
        item.scheduled_time = None
        item.manual_start = True

        await scheduler._check_auto_drying(db, [item], set())

        # Should have stopped drying
        assert mock_pm.send_drying_command.called
        assert not scheduler._drying_in_progress

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_stops_when_empty_queue(self, mock_pm, scheduler):
        """Auto-drying stops when queue is completely empty (queue mode only)."""
        scheduler._drying_in_progress = {1: time.monotonic()}

        state = MagicMock()
        state.raw_data = {"ams": [{"id": 0, "dry_time": 120}]}
        mock_pm.get_status.return_value = state

        db = AsyncMock()
        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        await scheduler._check_auto_drying(db, [], set())

        assert mock_pm.send_drying_command.called
        assert not scheduler._drying_in_progress


class TestDryingTrackingTimestamps:
    """Test that _drying_in_progress uses timestamps, not booleans."""

    def test_initial_state_empty(self):
        """Fresh scheduler has no drying tracked."""
        scheduler = PrintScheduler()
        assert scheduler._drying_in_progress == {}

    def test_timestamp_is_monotonic(self):
        """Tracked values should be monotonic timestamps."""
        scheduler = PrintScheduler()
        before = time.monotonic()
        scheduler._drying_in_progress[1] = time.monotonic()
        after = time.monotonic()
        assert before <= scheduler._drying_in_progress[1] <= after

    def test_timestamp_is_truthy(self):
        """Timestamps are truthy for .get() checks (backward compat with bool pattern)."""
        scheduler = PrintScheduler()
        scheduler._drying_in_progress[1] = time.monotonic()
        assert scheduler._drying_in_progress.get(1)
        assert not scheduler._drying_in_progress.get(999)


class _DryingTestBase:
    """Shared helpers for auto-drying integration tests."""

    @staticmethod
    def _make_setting(value):
        s = MagicMock()
        s.value = value
        return s

    @staticmethod
    def _make_db_side_effect(settings_map, printer_ids=None):
        """Create a side_effect for db.execute that returns settings by key and printers."""
        if printer_ids is None:
            printer_ids = [1]

        async def side_effect(stmt):
            result = MagicMock()
            stmt_str = str(stmt)

            try:
                compiled = stmt.compile(compile_kwargs={"literal_binds": False})
                param_values = list(compiled.params.values())
            except Exception:
                param_values = []

            for key, val in settings_map.items():
                if key in param_values:
                    result.scalar_one_or_none.return_value = val
                    return result

            if "printer" in stmt_str.lower() or "is_active" in stmt_str:
                printers = []
                for pid in printer_ids:
                    p = MagicMock()
                    p.id = pid
                    p.is_active = True
                    printers.append(p)
                scalars_mock = MagicMock()
                scalars_mock.__iter__ = MagicMock(return_value=iter(printers))
                result.scalars.return_value = scalars_mock
            else:
                result.scalar_one_or_none.return_value = None
            return result

        return side_effect


class TestAmbientDrying(_DryingTestBase):
    """Tests for ambient drying mode — drying based on humidity regardless of queue state."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_ambient_dries_idle_printer_without_queue(self, mock_sd, mock_pm, scheduler):
        """Ambient mode starts drying on idle printers even with no queue items."""
        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 0,
                    "humidity_raw": "75",
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PLA"}],
                }
            ]
        }
        state.firmware_version = "01.09.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "X1C"
        mock_pm.send_drying_command.return_value = True

        scheduler._is_printer_idle = MagicMock(return_value=True)
        db = AsyncMock()

        settings_returns = {
            "queue_drying_enabled": self._make_setting("false"),
            "ambient_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        # Empty queue — ambient mode should still dry
        await scheduler._check_auto_drying(db, [], set())

        mock_pm.send_drying_command.assert_called_once_with(1, 0, 45, 12, mode=1, filament="PLA")
        assert 1 in scheduler._drying_in_progress

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_ambient_does_not_dry_below_threshold(self, mock_sd, mock_pm, scheduler):
        """Ambient mode does NOT dry when humidity is below threshold."""
        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 0,
                    "humidity_raw": "40",
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PLA"}],
                }
            ]
        }
        state.firmware_version = "01.09.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "X1C"

        scheduler._is_printer_idle = MagicMock(return_value=True)
        db = AsyncMock()

        settings_returns = {
            "queue_drying_enabled": self._make_setting("false"),
            "ambient_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        await scheduler._check_auto_drying(db, [], set())

        mock_pm.send_drying_command.assert_not_called()

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_ambient_off_stops_drying_without_queue(self, mock_pm, scheduler):
        """Disabling ambient drying stops drying on printers without queue items."""
        scheduler._drying_in_progress = {1: time.monotonic()}

        state = MagicMock()
        state.raw_data = {"ams": [{"id": 0, "dry_time": 120}]}
        mock_pm.get_status.return_value = state

        db = AsyncMock()
        settings_returns = {
            "queue_drying_enabled": self._make_setting("false"),
            "ambient_drying_enabled": self._make_setting("false"),
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        await scheduler._check_auto_drying(db, [], set())

        assert mock_pm.send_drying_command.called
        assert not scheduler._drying_in_progress

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_ambient_continues_when_queue_empty(self, mock_sd, mock_pm, scheduler):
        """Ambient drying continues even when queue has no scheduled items (unlike queue mode)."""
        scheduler._drying_in_progress = {1: time.monotonic() - 100}

        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 600,
                    "humidity_raw": "75",
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PLA"}],
                }
            ]
        }
        state.firmware_version = "01.09.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "X1C"

        scheduler._is_printer_idle = MagicMock(return_value=True)
        db = AsyncMock()

        settings_returns = {
            "queue_drying_enabled": self._make_setting("false"),
            "ambient_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        await scheduler._check_auto_drying(db, [], set())

        # Should NOT have sent stop — humidity still high, drying continues
        for call in mock_pm.send_drying_command.call_args_list:
            assert call.kwargs.get("mode") != 0, "Should not stop drying in ambient mode with high humidity"
        assert 1 in scheduler._drying_in_progress

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_queue_only_does_not_dry_without_scheduled_items(self, mock_sd, mock_pm, scheduler):
        """Queue mode alone does NOT dry printers that have no scheduled queue items."""
        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 0,
                    "humidity_raw": "75",
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PLA"}],
                }
            ]
        }
        state.firmware_version = "01.09.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "X1C"

        scheduler._is_printer_idle = MagicMock(return_value=True)
        db = AsyncMock()

        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        # No queue items at all
        await scheduler._check_auto_drying(db, [], set())

        mock_pm.send_drying_command.assert_not_called()


class TestBlockForDryingBugFix(_DryingTestBase):
    """Regression: block mode gates NEW drying starts but must leave running dries alone (#1892)."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_block_mode_leaves_active_drying_running(self, mock_sd, mock_pm, scheduler):
        """#1892: a printer already drying in block mode must not be stopped by a humidity re-check."""
        # Drying started 35 minutes ago
        scheduler._drying_in_progress = {1: time.monotonic() - 2100}

        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 600,
                    "humidity_raw": "30",  # Below threshold
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PLA"}],
                }
            ]
        }
        state.firmware_version = "01.09.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "X1C"

        scheduler._is_printer_idle = MagicMock(return_value=True)
        db = AsyncMock()

        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("true"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        # Queue item exists for this printer (triggers block mode gate)
        item = MagicMock()
        item.printer_id = 1
        item.scheduled_time = MagicMock()
        item.manual_start = False

        await scheduler._check_auto_drying(db, [item], set())

        # Must NOT stop the running dry — block mode gates new starts, not active cycles
        for call in mock_pm.send_drying_command.call_args_list:
            assert call != ((1, 0), {"temp": 0, "duration": 0, "mode": 0}), (
                "Block mode must not stop an already-running drying cycle (#1892)"
            )

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_block_mode_prevents_new_drying_start(self, mock_sd, mock_pm, scheduler):
        """Block mode should still prevent starting NEW drying on printers with pending items."""
        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 0,
                    "humidity_raw": "75",
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PLA"}],
                }
            ]
        }
        state.firmware_version = "01.09.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "X1C"

        scheduler._is_printer_idle = MagicMock(return_value=True)
        db = AsyncMock()

        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("true"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        item = MagicMock()
        item.printer_id = 1
        item.scheduled_time = MagicMock()
        item.manual_start = False

        await scheduler._check_auto_drying(db, [item], set())

        # Should NOT start drying — block mode with pending items
        mock_pm.send_drying_command.assert_not_called()


class TestResolveHumidityThreshold:
    """Per-filament humidity threshold resolver (#1605).

    Resolves the trigger threshold for an AMS unit from the loaded tray types.
    Mixed loads use the lowest (most restrictive) value. Empty / unloaded trays
    contribute no constraint; falls back to the global ``ams_humidity_fair``
    when no per-type overrides are configured.
    """

    def test_no_overrides_falls_back_to_global(self):
        """Empty overrides map → caller's global fallback is used verbatim."""
        result = PrintScheduler.resolve_humidity_threshold([{"tray_type": "PLA"}], {}, 60)
        assert result == 60

    def test_single_known_type_uses_override(self):
        """Single PLA tray with override = 50 returns 50."""
        result = PrintScheduler.resolve_humidity_threshold(
            [{"tray_type": "PLA Basic"}],
            {"default": 60, "PLA": 50},
            60,
        )
        assert result == 50

    def test_mixed_load_picks_lowest(self):
        """Mixed PLA (60) + Nylon (20) → most restrictive = 20."""
        result = PrintScheduler.resolve_humidity_threshold(
            [{"tray_type": "PLA Basic"}, {"tray_type": "PA Glass"}],
            {"default": 60, "PLA": 60, "PA": 20},
            60,
        )
        assert result == 20

    def test_unknown_type_uses_default_key(self):
        """Tray type not in the map falls back to the 'default' key, not the
        caller fallback. Lets the user tune unknown-filament behavior."""
        result = PrintScheduler.resolve_humidity_threshold(
            [{"tray_type": "EXOTIC_WOOD"}],
            {"default": 40, "PLA": 60},
            999,
        )
        assert result == 40

    def test_empty_tray_slots_skipped(self):
        """Empty tray_type strings (unloaded slots) contribute no constraint."""
        result = PrintScheduler.resolve_humidity_threshold(
            [{"tray_type": ""}, {"tray_type": "PLA"}],
            {"default": 30, "PLA": 50},
            60,
        )
        assert result == 50

    def test_all_empty_trays_uses_default_key(self):
        """No loaded trays at all → falls back to default key (or fallback if
        no overrides). Matches the empty-AMS behavior of the existing alarm
        site so an empty AMS still alarms at the user's default rate."""
        result = PrintScheduler.resolve_humidity_threshold(
            [{"tray_type": ""}, {}],
            {"default": 30, "PLA": 50},
            60,
        )
        assert result == 30

    def test_filament_name_normalized(self):
        """Tray types like 'PLA Basic', 'pla basic' all normalize to 'PLA'."""
        result = PrintScheduler.resolve_humidity_threshold(
            [{"tray_type": "pla basic"}],
            {"default": 60, "PLA": 25},
            60,
        )
        assert result == 25

    def test_no_tray_type_field_skipped(self):
        """Missing tray_type field is treated as empty (unloaded)."""
        result = PrintScheduler.resolve_humidity_threshold(
            [{}, {"tray_type": "ASA"}],
            {"default": 60, "ASA": 30},
            60,
        )
        assert result == 30


class TestGetHumidityThresholds:
    """The DB-loading helper for ``ams_humidity_thresholds`` (#1605)."""

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @pytest.mark.asyncio
    async def test_missing_setting_returns_empty(self, scheduler):
        db = AsyncMock()
        db.execute = AsyncMock(return_value=MagicMock(scalar_one_or_none=MagicMock(return_value=None)))
        result = await scheduler._get_humidity_thresholds(db)
        assert result == {}

    @pytest.mark.asyncio
    async def test_empty_value_returns_empty(self, scheduler):
        db = AsyncMock()
        setting = MagicMock(value="")
        db.execute = AsyncMock(return_value=MagicMock(scalar_one_or_none=MagicMock(return_value=setting)))
        result = await scheduler._get_humidity_thresholds(db)
        assert result == {}

    @pytest.mark.asyncio
    async def test_invalid_json_returns_empty(self, scheduler):
        db = AsyncMock()
        setting = MagicMock(value="not json{")
        db.execute = AsyncMock(return_value=MagicMock(scalar_one_or_none=MagicMock(return_value=setting)))
        result = await scheduler._get_humidity_thresholds(db)
        assert result == {}

    @pytest.mark.asyncio
    async def test_valid_json_normalizes_keys(self, scheduler):
        """Filament-type keys uppercase; 'default' preserved."""
        db = AsyncMock()
        setting = MagicMock(value='{"default": 60, "pla": 50, "ASA": 30, "garbage": "x"}')
        db.execute = AsyncMock(return_value=MagicMock(scalar_one_or_none=MagicMock(return_value=setting)))
        result = await scheduler._get_humidity_thresholds(db)
        assert result == {"default": 60, "PLA": 50, "ASA": 30}


class TestMidPrintDrying(_DryingTestBase):
    """Tests for the print_drying_enabled path — drying that runs CONCURRENTLY
    with an active print on capable hardware (H2D / H2C / H2S / P2S / X2D / X1C /
    A2L / H2D Pro on recent firmware). Distinct from idle drying.

    Verifies:
      - With the toggle ON and capable hardware, a printer in the busy set is
        still evaluated and drying fires at the capped temperature.
      - The temperature cap is max(40, preset_temp - 5) — protects spools.
      - With the toggle OFF, the existing busy-printer skip still applies.
      - With the toggle ON but unsupported firmware, the busy-printer skip
        still applies (gated by supports_drying_while_printing).
    """

    @pytest.fixture
    def scheduler(self):
        return PrintScheduler()

    @staticmethod
    def _ams_unit(humidity: str = "75"):
        return {
            "id": 0,
            "module_type": "n3f",
            "dry_time": 0,
            "humidity_raw": humidity,
            "dry_sf_reason": [],
            "tray": [{"tray_type": "PLA"}],
        }

    def _state(self, firmware: str):
        state = MagicMock()
        state.raw_data = {"ams": [self._ams_unit()]}
        state.firmware_version = firmware
        return state

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_running_printer_dries_when_enabled_and_capable(self, mock_pm, scheduler):
        """Toggle ON + capable hardware: running printer dries at capped temp."""
        mock_pm.get_status.return_value = self._state("01.03.00.00")
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "H2D"
        mock_pm.send_drying_command.return_value = True

        scheduler._is_printer_idle = MagicMock(return_value=False)
        db = AsyncMock()
        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
            "print_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        # Printer 1 is in busy_printers — would normally be skipped
        await scheduler._check_auto_drying(db, [], {1})

        # PLA preset is 45 degC for n3f; mid-print cap is max(40, 45-5) = 40
        mock_pm.send_drying_command.assert_called_once_with(1, 0, 40, 12, mode=1, filament="PLA")
        assert 1 in scheduler._drying_in_progress

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_temp_cap_applied_above_floor(self, mock_pm, scheduler):
        """Higher-temp filament (PETG n3f=65) caps to 60, not floor."""
        state = MagicMock()
        state.raw_data = {
            "ams": [
                {
                    "id": 0,
                    "module_type": "n3f",
                    "dry_time": 0,
                    "humidity_raw": "75",
                    "dry_sf_reason": [],
                    "tray": [{"tray_type": "PETG"}],
                }
            ]
        }
        state.firmware_version = "01.03.00.00"
        mock_pm.get_status.return_value = state
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "H2D"
        mock_pm.send_drying_command.return_value = True

        scheduler._is_printer_idle = MagicMock(return_value=False)
        db = AsyncMock()
        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
            "print_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        await scheduler._check_auto_drying(db, [], {1})

        # PETG preset 65 -> max(40, 65-5) = 60
        mock_pm.send_drying_command.assert_called_once_with(1, 0, 60, 12, mode=1, filament="PETG")

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    @patch("backend.app.services.print_scheduler.supports_drying", return_value=True)
    async def test_running_printer_skipped_when_toggle_off(self, mock_sd, mock_pm, scheduler):
        """Toggle OFF: running printer is skipped even on capable hardware."""
        mock_pm.get_status.return_value = self._state("01.03.00.00")
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "H2D"

        scheduler._is_printer_idle = MagicMock(return_value=False)
        db = AsyncMock()
        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
            "print_drying_enabled": self._make_setting("false"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        await scheduler._check_auto_drying(db, [], {1})

        mock_pm.send_drying_command.assert_not_called()

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_running_printer_skipped_when_firmware_too_old(self, mock_pm, scheduler):
        """Toggle ON but firmware below matrix threshold: skip."""
        # H2D matrix minimum is 01.03.00.00; this is below
        mock_pm.get_status.return_value = self._state("01.02.30.00")
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "H2D"

        scheduler._is_printer_idle = MagicMock(return_value=False)
        db = AsyncMock()
        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
            "print_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        await scheduler._check_auto_drying(db, [], {1})

        mock_pm.send_drying_command.assert_not_called()

    @pytest.mark.asyncio
    @patch("backend.app.services.print_scheduler.printer_manager")
    async def test_running_printer_skipped_when_model_excluded(self, mock_pm, scheduler):
        """Toggle ON, recent firmware, but excluded model (A1): skip."""
        mock_pm.get_status.return_value = self._state("99.99.99.99")
        mock_pm.is_connected.return_value = True
        mock_pm.get_model.return_value = "A1"

        scheduler._is_printer_idle = MagicMock(return_value=False)
        db = AsyncMock()
        settings_returns = {
            "queue_drying_enabled": self._make_setting("true"),
            "ambient_drying_enabled": self._make_setting("false"),
            "print_drying_enabled": self._make_setting("true"),
            "ams_humidity_fair": self._make_setting("60"),
            "queue_drying_block": self._make_setting("false"),
            "drying_presets": None,
        }
        db.execute = AsyncMock(side_effect=self._make_db_side_effect(settings_returns))

        await scheduler._check_auto_drying(db, [], {1})

        mock_pm.send_drying_command.assert_not_called()