# -*- coding: utf-8 -*-
"""
Tests für Keyboard Input Service.

Testet:
- KeyboardInputService Initialisierung und Lifecycle
- SimpleKeyboardInput Fallback
- create_keyboard_input Factory
- Conversation State Management
- Follow-Up Handling
"""

import asyncio
import pytest
from unittest.mock import MagicMock, AsyncMock, patch

from trixy_core.input.keyboard_input import (
    KeyboardInputService,
    SimpleKeyboardInput,
    create_keyboard_input,
    _check_prompt_toolkit,
)
from trixy_core.network.cmd import FollowUpRequest, TextInput


# =============================================================================
# Fixtures
# =============================================================================

@pytest.fixture
def mock_app():
    """Mock-Application mit Events und Properties."""
    app = MagicMock()
    app.room = "test_room"
    app.alias = "test_alias"
    app.shutdown = MagicMock()

    # Events Mock
    app.events = MagicMock()
    app.events.trigger = AsyncMock()

    return app


@pytest.fixture
def mock_connection():
    """Mock-ClientConnection."""
    conn = MagicMock()
    conn.is_connected = True
    conn.send_command = AsyncMock(return_value=True)
    return conn


@pytest.fixture
def keyboard_service(mock_app):
    """Erstellt einen KeyboardInputService ohne Connection."""
    return KeyboardInputService(mock_app, connection=None, prompt=">>> ")


@pytest.fixture
def keyboard_service_with_connection(mock_app, mock_connection):
    """Erstellt einen KeyboardInputService mit Connection."""
    return KeyboardInputService(mock_app, connection=mock_connection, prompt=">>> ")


@pytest.fixture
def simple_input(mock_app):
    """Erstellt einen SimpleKeyboardInput."""
    return SimpleKeyboardInput(mock_app, connection=None, prompt=">>> ")


@pytest.fixture
def simple_input_with_connection(mock_app, mock_connection):
    """Erstellt einen SimpleKeyboardInput mit Connection."""
    return SimpleKeyboardInput(mock_app, connection=mock_connection, prompt=">>> ")


# =============================================================================
# Tests für _check_prompt_toolkit
# =============================================================================

class TestCheckPromptToolkit:
    """Tests für die prompt_toolkit Verfügbarkeitsprüfung."""

    def test_returns_bool(self):
        """Testet, dass ein Boolean zurückgegeben wird."""
        result = _check_prompt_toolkit()
        assert isinstance(result, bool)

    def test_result_is_cached(self):
        """Testet, dass das Ergebnis gecacht wird."""
        result1 = _check_prompt_toolkit()
        result2 = _check_prompt_toolkit()
        assert result1 == result2


# =============================================================================
# Tests für KeyboardInputService - Initialisierung
# =============================================================================

class TestKeyboardInputServiceInit:
    """Tests für KeyboardInputService Initialisierung."""

    def test_initial_state(self, keyboard_service):
        """Testet den Initialzustand."""
        assert keyboard_service.is_running is False
        assert keyboard_service.has_active_session is False
        assert keyboard_service._input_active is False

    def test_initial_prompt(self, keyboard_service):
        """Testet den initialen Prompt."""
        assert keyboard_service._prompt == ">>> "

    def test_custom_prompt(self, mock_app):
        """Testet benutzerdefinierten Prompt."""
        service = KeyboardInputService(mock_app, prompt="Test> ")
        assert service._prompt == "Test> "

    def test_no_connection_initially(self, keyboard_service):
        """Testet, dass keine Connection initial gesetzt ist."""
        assert keyboard_service._connection is None

    def test_with_connection(self, keyboard_service_with_connection, mock_connection):
        """Testet Service mit Connection."""
        assert keyboard_service_with_connection._connection is mock_connection


# =============================================================================
# Tests für KeyboardInputService - Properties
# =============================================================================

class TestKeyboardInputServiceProperties:
    """Tests für KeyboardInputService Properties."""

    def test_is_running_false_initially(self, keyboard_service):
        """Testet is_running initial."""
        assert keyboard_service.is_running is False

    def test_has_active_session_false_initially(self, keyboard_service):
        """Testet has_active_session initial."""
        assert keyboard_service.has_active_session is False

    def test_has_active_session_true_with_session(self, keyboard_service):
        """Testet has_active_session mit Session."""
        keyboard_service._current_session_id = "test-session-123"
        assert keyboard_service.has_active_session is True

    def test_has_active_session_false_with_empty_session(self, keyboard_service):
        """Testet has_active_session mit leerer Session."""
        keyboard_service._current_session_id = ""
        assert keyboard_service.has_active_session is False


# =============================================================================
# Tests für KeyboardInputService - set_connection
# =============================================================================

class TestKeyboardInputServiceSetConnection:
    """Tests für set_connection Methode."""

    def test_set_connection(self, keyboard_service, mock_connection):
        """Testet Setzen der Connection."""
        assert keyboard_service._connection is None
        keyboard_service.set_connection(mock_connection)
        assert keyboard_service._connection is mock_connection


# =============================================================================
# Tests für KeyboardInputService - Conversation State
# =============================================================================

class TestKeyboardInputServiceConversationState:
    """Tests für Conversation State Management."""

    @pytest.mark.asyncio
    async def test_request_input_new_conversation(self, keyboard_service):
        """Testet request_input für neue Conversation."""
        await keyboard_service.request_input()

        assert keyboard_service._awaiting_follow_up is False
        assert keyboard_service._follow_up_question == ""
        assert keyboard_service._follow_up_number == 0
        assert keyboard_service._current_session_id == ""

    @pytest.mark.asyncio
    async def test_request_input_follow_up(self, keyboard_service):
        """Testet request_input für Follow-Up."""
        await keyboard_service.request_input(
            follow_up_question="Was meinst du damit?",
            session_id="session-123"
        )

        assert keyboard_service._awaiting_follow_up is True
        assert keyboard_service._follow_up_question == "Was meinst du damit?"
        assert keyboard_service._follow_up_number == 1
        assert keyboard_service._current_session_id == "session-123"

    @pytest.mark.asyncio
    async def test_request_input_multiple_follow_ups(self, keyboard_service):
        """Testet mehrere Follow-Ups hintereinander."""
        await keyboard_service.request_input(
            follow_up_question="Frage 1?",
            session_id="session-123"
        )
        assert keyboard_service._follow_up_number == 1

        await keyboard_service.request_input(
            follow_up_question="Frage 2?",
            session_id="session-123"
        )
        assert keyboard_service._follow_up_number == 2

    @pytest.mark.asyncio
    async def test_handle_follow_up_request(self, keyboard_service):
        """Testet handle_follow_up_request."""
        request = FollowUpRequest(
            session_id="session-456",
            question="Kannst du das genauer erklären?"
        )

        # Muss als Task erstellt werden (async)
        keyboard_service.handle_follow_up_request(request)

        # Kurz warten damit Task ausgeführt wird
        await asyncio.sleep(0.01)

        assert keyboard_service._awaiting_follow_up is True
        assert keyboard_service._follow_up_question == "Kannst du das genauer erklären?"
        assert keyboard_service._current_session_id == "session-456"

    def test_handle_conversation_end_matching_session(self, keyboard_service):
        """Testet handle_conversation_end mit passender Session."""
        keyboard_service._current_session_id = "session-789"
        keyboard_service._awaiting_follow_up = True
        keyboard_service._follow_up_question = "Test?"
        keyboard_service._follow_up_number = 3

        keyboard_service.handle_conversation_end("session-789")

        assert keyboard_service._current_session_id == ""
        assert keyboard_service._awaiting_follow_up is False
        assert keyboard_service._follow_up_question == ""
        assert keyboard_service._follow_up_number == 0

    def test_handle_conversation_end_different_session(self, keyboard_service):
        """Testet handle_conversation_end mit anderer Session."""
        keyboard_service._current_session_id = "session-789"
        keyboard_service._awaiting_follow_up = True
        keyboard_service._follow_up_number = 3

        keyboard_service.handle_conversation_end("session-other")

        # State sollte unverändert sein
        assert keyboard_service._current_session_id == "session-789"
        assert keyboard_service._awaiting_follow_up is True
        assert keyboard_service._follow_up_number == 3


# =============================================================================
# Tests für KeyboardInputService - _process_input
# =============================================================================

class TestKeyboardInputServiceProcessInput:
    """Tests für _process_input Methode."""

    @pytest.mark.asyncio
    async def test_process_input_standalone_mode(self, keyboard_service, mock_app):
        """Testet Input-Verarbeitung im Standalone-Modus (keine Connection)."""
        await keyboard_service._process_input("Hallo Trixy")

        # Event sollte ausgelöst worden sein
        mock_app.events.trigger.assert_called_once()

        # Prüfe Event-Parameter
        call_args = mock_app.events.trigger.call_args
        assert call_args[0][0] == "speech_recognized"

        event_data = call_args[0][1]
        assert event_data.text == "Hallo Trixy"
        assert event_data.source == "keyboard"
        assert event_data.confidence == 1.0

    @pytest.mark.asyncio
    async def test_process_input_client_mode(self, keyboard_service_with_connection, mock_connection):
        """Testet Input-Verarbeitung im Client-Modus (mit Connection)."""
        await keyboard_service_with_connection._process_input("Test Input")

        # Command sollte gesendet worden sein
        mock_connection.send_command.assert_called_once()

        # Prüfe Command-Parameter
        call_args = mock_connection.send_command.call_args
        cmd = call_args[0][0]

        assert isinstance(cmd, TextInput)
        assert cmd.text == "Test Input"
        assert cmd.satellite_id == "test_alias"
        assert cmd.room_id == "test_room"
        assert cmd.language == "de"

    @pytest.mark.asyncio
    async def test_process_input_generates_session_id(self, keyboard_service):
        """Testet, dass Session-ID generiert wird."""
        assert keyboard_service._current_session_id == ""

        await keyboard_service._process_input("Test")

        assert keyboard_service._current_session_id != ""
        assert keyboard_service._current_session_id.startswith("kb-")

    @pytest.mark.asyncio
    async def test_process_input_preserves_session_id(self, keyboard_service):
        """Testet, dass existierende Session-ID beibehalten wird."""
        keyboard_service._current_session_id = "existing-session"

        await keyboard_service._process_input("Test")

        assert keyboard_service._current_session_id == "existing-session"

    @pytest.mark.asyncio
    async def test_process_input_resets_follow_up(self, keyboard_service):
        """Testet, dass Follow-Up-State zurückgesetzt wird."""
        keyboard_service._awaiting_follow_up = True
        keyboard_service._follow_up_question = "Test?"

        await keyboard_service._process_input("Antwort")

        assert keyboard_service._awaiting_follow_up is False
        assert keyboard_service._follow_up_question == ""

    @pytest.mark.asyncio
    async def test_process_input_follow_up_flag(self, keyboard_service_with_connection, mock_connection):
        """Testet, dass Follow-Up-Flag im Command gesetzt wird."""
        keyboard_service_with_connection._awaiting_follow_up = True
        keyboard_service_with_connection._follow_up_number = 2
        keyboard_service_with_connection._current_session_id = "session-123"

        await keyboard_service_with_connection._process_input("Follow-Up Antwort")

        call_args = mock_connection.send_command.call_args
        cmd = call_args[0][0]

        assert cmd.is_follow_up is True
        assert cmd.follow_up_number == 2


# =============================================================================
# Tests für SimpleKeyboardInput - Initialisierung
# =============================================================================

class TestSimpleKeyboardInputInit:
    """Tests für SimpleKeyboardInput Initialisierung."""

    def test_initial_state(self, simple_input):
        """Testet den Initialzustand."""
        assert simple_input._running is False
        assert simple_input._task is None

    def test_initial_prompt(self, simple_input):
        """Testet den initialen Prompt."""
        assert simple_input._prompt == ">>> "

    def test_custom_prompt(self, mock_app):
        """Testet benutzerdefinierten Prompt."""
        service = SimpleKeyboardInput(mock_app, prompt="Simple> ")
        assert service._prompt == "Simple> "

    def test_conversation_state_initial(self, simple_input):
        """Testet initialen Conversation State."""
        assert simple_input._current_session_id == ""
        assert simple_input._awaiting_follow_up is False
        assert simple_input._follow_up_number == 0
        assert simple_input._follow_up_question == ""


# =============================================================================
# Tests für SimpleKeyboardInput - set_connection
# =============================================================================

class TestSimpleKeyboardInputSetConnection:
    """Tests für SimpleKeyboardInput set_connection."""

    def test_set_connection(self, simple_input, mock_connection):
        """Testet Setzen der Connection."""
        assert simple_input._connection is None
        simple_input.set_connection(mock_connection)
        assert simple_input._connection is mock_connection


# =============================================================================
# Tests für SimpleKeyboardInput - Lifecycle
# =============================================================================

class TestSimpleKeyboardInputLifecycle:
    """Tests für SimpleKeyboardInput Lifecycle."""

    @pytest.mark.asyncio
    async def test_start_sets_running(self, simple_input):
        """Testet, dass start() _running setzt."""
        # Patch input() um blocking zu vermeiden
        with patch('builtins.input', return_value=""):
            result = await simple_input.start()

            assert result is True
            assert simple_input._running is True
            assert simple_input._task is not None

            # Cleanup
            await simple_input.stop()

    @pytest.mark.asyncio
    async def test_start_already_running(self, simple_input):
        """Testet start() wenn bereits läuft."""
        simple_input._running = True

        result = await simple_input.start()

        assert result is True

    @pytest.mark.asyncio
    async def test_stop_sets_not_running(self, simple_input):
        """Testet, dass stop() _running zurücksetzt."""
        simple_input._running = True
        simple_input._task = asyncio.create_task(asyncio.sleep(10))

        await simple_input.stop()

        assert simple_input._running is False


# =============================================================================
# Tests für SimpleKeyboardInput - Conversation State
# =============================================================================

class TestSimpleKeyboardInputConversationState:
    """Tests für SimpleKeyboardInput Conversation State."""

    @pytest.mark.asyncio
    async def test_request_input_follow_up(self, simple_input):
        """Testet request_input für Follow-Up."""
        await simple_input.request_input(
            follow_up_question="Follow-Up Frage?",
            session_id="session-abc"
        )

        assert simple_input._awaiting_follow_up is True
        assert simple_input._follow_up_question == "Follow-Up Frage?"
        assert simple_input._follow_up_number == 1
        assert simple_input._current_session_id == "session-abc"

    def test_handle_conversation_end(self, simple_input):
        """Testet handle_conversation_end."""
        simple_input._current_session_id = "session-end"
        simple_input._awaiting_follow_up = True
        simple_input._follow_up_number = 5

        simple_input.handle_conversation_end("session-end")

        assert simple_input._current_session_id == ""
        assert simple_input._awaiting_follow_up is False
        assert simple_input._follow_up_number == 0


# =============================================================================
# Tests für SimpleKeyboardInput - _process_input
# =============================================================================

class TestSimpleKeyboardInputProcessInput:
    """Tests für SimpleKeyboardInput _process_input."""

    @pytest.mark.asyncio
    async def test_process_input_standalone(self, simple_input, mock_app):
        """Testet Input-Verarbeitung ohne Connection."""
        await simple_input._process_input("Simple Test")

        mock_app.events.trigger.assert_called_once()

        call_args = mock_app.events.trigger.call_args
        assert call_args[0][0] == "speech_recognized"

        event_data = call_args[0][1]
        assert event_data.text == "Simple Test"
        assert event_data.source == "keyboard"

    @pytest.mark.asyncio
    async def test_process_input_with_connection(self, simple_input_with_connection, mock_connection):
        """Testet Input-Verarbeitung mit Connection."""
        await simple_input_with_connection._process_input("Connected Test")

        mock_connection.send_command.assert_called_once()

        call_args = mock_connection.send_command.call_args
        cmd = call_args[0][0]

        assert isinstance(cmd, TextInput)
        assert cmd.text == "Connected Test"

    @pytest.mark.asyncio
    async def test_process_input_resets_follow_up(self, simple_input):
        """Testet, dass Follow-Up zurückgesetzt wird."""
        simple_input._awaiting_follow_up = True
        simple_input._follow_up_question = "Test?"

        await simple_input._process_input("Antwort")

        assert simple_input._awaiting_follow_up is False
        assert simple_input._follow_up_question == ""


# =============================================================================
# Tests für create_keyboard_input Factory
# =============================================================================

class TestCreateKeyboardInput:
    """Tests für create_keyboard_input Factory-Funktion."""

    def test_returns_keyboard_input_service_or_simple(self, mock_app):
        """Testet, dass die Factory die richtige Klasse zurückgibt."""
        result = create_keyboard_input(mock_app)

        # Je nach prompt_toolkit Verfügbarkeit
        assert isinstance(result, (KeyboardInputService, SimpleKeyboardInput))

    def test_with_connection(self, mock_app, mock_connection):
        """Testet Factory mit Connection."""
        result = create_keyboard_input(mock_app, connection=mock_connection)

        assert result._connection is mock_connection

    def test_with_custom_prompt(self, mock_app):
        """Testet Factory mit benutzerdefiniertem Prompt."""
        result = create_keyboard_input(mock_app, prompt="Custom> ")

        assert result._prompt == "Custom> "

    def test_returns_simple_when_no_prompt_toolkit(self, mock_app):
        """Testet, dass SimpleKeyboardInput zurückgegeben wird ohne prompt_toolkit."""
        with patch('trixy_core.input.keyboard_input._check_prompt_toolkit', return_value=False):
            # Importiere erneut um den Patch zu nutzen
            from trixy_core.input.keyboard_input import create_keyboard_input as factory
            result = factory(mock_app)

            assert isinstance(result, SimpleKeyboardInput)

    def test_returns_service_when_prompt_toolkit_available(self, mock_app):
        """Testet, dass KeyboardInputService zurückgegeben wird mit prompt_toolkit."""
        with patch('trixy_core.input.keyboard_input._check_prompt_toolkit', return_value=True):
            from trixy_core.input.keyboard_input import create_keyboard_input as factory
            result = factory(mock_app)

            assert isinstance(result, KeyboardInputService)


# =============================================================================
# Tests für TextInput Command
# =============================================================================

class TestTextInputCommand:
    """Tests für TextInput Command Erstellung."""

    @pytest.mark.asyncio
    async def test_text_input_command_fields(self, keyboard_service_with_connection, mock_connection):
        """Testet, dass alle TextInput Felder korrekt gesetzt werden."""
        keyboard_service_with_connection._current_session_id = "test-session"
        keyboard_service_with_connection._awaiting_follow_up = True
        keyboard_service_with_connection._follow_up_number = 3

        await keyboard_service_with_connection._process_input("Test Text")

        call_args = mock_connection.send_command.call_args
        cmd = call_args[0][0]

        assert cmd.satellite_id == "test_alias"
        assert cmd.text == "Test Text"
        assert cmd.session_id == "test-session"
        assert cmd.room_id == "test_room"
        assert cmd.language == "de"
        assert cmd.is_follow_up is True
        assert cmd.follow_up_number == 3


# =============================================================================
# Integration Tests
# =============================================================================

class TestKeyboardInputIntegration:
    """Integrationstests für Keyboard Input."""

    @pytest.mark.asyncio
    async def test_full_conversation_flow_standalone(self, keyboard_service, mock_app):
        """Testet vollständigen Conversation-Flow im Standalone-Modus."""
        # Erste Eingabe
        await keyboard_service._process_input("Erste Nachricht")
        assert keyboard_service._current_session_id.startswith("kb-")
        session_id = keyboard_service._current_session_id

        # Follow-Up Request
        await keyboard_service.request_input(
            follow_up_question="Kannst du mehr sagen?",
            session_id=session_id
        )
        assert keyboard_service._awaiting_follow_up is True

        # Follow-Up Antwort
        await keyboard_service._process_input("Mehr Details")
        assert keyboard_service._awaiting_follow_up is False

        # Conversation Ende
        keyboard_service.handle_conversation_end(session_id)
        assert keyboard_service._current_session_id == ""

    @pytest.mark.asyncio
    async def test_full_conversation_flow_client(self, keyboard_service_with_connection, mock_connection):
        """Testet vollständigen Conversation-Flow im Client-Modus."""
        # Erste Eingabe
        await keyboard_service_with_connection._process_input("Client Nachricht")

        # Prüfe ersten Command
        first_call = mock_connection.send_command.call_args_list[0]
        first_cmd = first_call[0][0]
        assert first_cmd.is_follow_up is False

        session_id = keyboard_service_with_connection._current_session_id

        # Follow-Up Request
        await keyboard_service_with_connection.request_input(
            follow_up_question="Rückfrage?",
            session_id=session_id
        )

        # Follow-Up Antwort
        await keyboard_service_with_connection._process_input("Follow-Up Antwort")

        # Prüfe zweiten Command
        second_call = mock_connection.send_command.call_args_list[1]
        second_cmd = second_call[0][0]
        assert second_cmd.is_follow_up is True

    @pytest.mark.asyncio
    async def test_multiple_sessions(self, keyboard_service, mock_app):
        """Testet mehrere unabhängige Sessions."""
        # Erste Session
        await keyboard_service._process_input("Session 1")
        session1 = keyboard_service._current_session_id
        keyboard_service.handle_conversation_end(session1)

        # Zweite Session
        await keyboard_service._process_input("Session 2")
        session2 = keyboard_service._current_session_id

        # Sessions sollten unterschiedlich sein
        assert session1 != session2
        assert session2.startswith("kb-")


# =============================================================================
# Edge Cases
# =============================================================================

class TestEdgeCases:
    """Tests für Grenzfälle."""

    def test_handle_conversation_end_empty_session(self, keyboard_service):
        """Testet handle_conversation_end mit leerer Session."""
        keyboard_service._current_session_id = ""
        keyboard_service.handle_conversation_end("")
        # Sollte keinen Fehler werfen

    def test_handle_conversation_end_none_like(self, keyboard_service):
        """Testet handle_conversation_end mit None-ähnlichem Wert."""
        keyboard_service._current_session_id = "session-123"
        keyboard_service.handle_conversation_end("")
        # Session sollte unverändert sein
        assert keyboard_service._current_session_id == "session-123"

    @pytest.mark.asyncio
    async def test_process_input_missing_app_attributes(self, mock_app):
        """Testet _process_input wenn App-Attribute fehlen."""
        # Entferne Attribute
        del mock_app.room
        del mock_app.alias

        service = KeyboardInputService(mock_app)

        # Sollte Defaults verwenden
        await service._process_input("Test")

        call_args = mock_app.events.trigger.call_args
        event_data = call_args[0][1]
        assert event_data.room_id == "local"
        assert event_data.satellite_id == "keyboard"

    @pytest.mark.asyncio
    async def test_connection_disconnected(self, keyboard_service_with_connection, mock_connection, mock_app):
        """Testet Verhalten bei getrennter Connection."""
        mock_connection.is_connected = False

        await keyboard_service_with_connection._process_input("Offline Test")

        # Sollte auf Events zurückfallen
        mock_app.events.trigger.assert_called_once()
        mock_connection.send_command.assert_not_called()

    @pytest.mark.asyncio
    async def test_follow_up_request_with_empty_question(self, keyboard_service):
        """Testet handle_follow_up_request mit leerer Frage."""
        request = FollowUpRequest(session_id="session-123", question="")

        keyboard_service.handle_follow_up_request(request)
        await asyncio.sleep(0.01)
        # Sollte keinen Fehler werfen