import uuid
import pytest
from unittest.mock import AsyncMock, MagicMock
from aiogram.types import Message, InlineKeyboardMarkup
from aiogram.filters import CommandObject
from datetime import datetime

from src.bot.handlers import get_router
from src.processor.dto import EnrichedNewsItemDTO

@pytest.fixture
def mock_storage():
    return AsyncMock()

@pytest.fixture
def mock_processor():
    processor = MagicMock()
    processor.get_info.return_value = {"model": "test-model"}
    return processor

@pytest.fixture
def allowed_chat_id():
    return "123456789"

@pytest.fixture
def router(mock_storage, mock_processor, allowed_chat_id):
    return get_router(mock_storage, mock_processor, allowed_chat_id)

def get_handler(router, callback_name):
    for handler in router.message.handlers:
        if handler.callback.__name__ == callback_name:
            return handler.callback
    raise ValueError(f"Handler {callback_name} not found")

@pytest.mark.asyncio
async def test_command_hottest_handler_success(router, mock_storage, allowed_chat_id):
    """
    Test that /hottest command calls get_top_ranked and returns a list of items.
    """
    # 1. Arrange
    handler = get_handler(router, "command_hottest_handler")
    message = AsyncMock()
    message.chat = MagicMock()
    message.chat.id = int(allowed_chat_id)
    message.answer = AsyncMock()
    
    mock_items = [
        EnrichedNewsItemDTO(
            title=f"Hot News {i}",
            url=f"https://example.com/{i}",
            content_text=f"Content {i}",
            source="Source",
            timestamp=datetime.now(),
            relevance_score=10-i,
            summary_ru=f"Сводка {i}",
            anomalies_detected=[],
            category="Tech"
        ) for i in range(3)
    ]
    mock_storage.get_top_ranked.return_value = mock_items
    
    # 2. Act
    command = CommandObject(prefix='/', command='hottest', args=None)
    await handler(message=message, command=command)
    
    # 3. Assert
    mock_storage.get_top_ranked.assert_called_once_with(limit=10, category=None)
    message.answer.assert_called_once()
    
    args, kwargs = message.answer.call_args
    assert "Top 3 Hottest Trends:" in args[0]
    assert "reply_markup" in kwargs
    assert isinstance(kwargs["reply_markup"], InlineKeyboardMarkup)
    
    # Check if all 3 items are in the markup
    markup = kwargs["reply_markup"]
    assert len(markup.inline_keyboard) == 3
    
    # Check if icons and scores are present
    button_text = markup.inline_keyboard[0][0].text
    assert "🔥" in button_text
    assert "[10/10]" in button_text
    assert "Hot News 0" in button_text

@pytest.mark.asyncio
async def test_command_hottest_handler_empty(router, mock_storage, allowed_chat_id):
    """
    Test that /hottest command handles empty results correctly.
    """
    # 1. Arrange
    handler = get_handler(router, "command_hottest_handler")
    message = AsyncMock()
    message.chat = MagicMock()
    message.chat.id = int(allowed_chat_id)
    message.answer = AsyncMock()
    
    mock_storage.get_top_ranked.return_value = []
    
    # 2. Act
    command = CommandObject(prefix='/', command='hottest', args=None)
    await handler(message=message, command=command)
    
    # 3. Assert
    mock_storage.get_top_ranked.assert_called_once_with(limit=10, category=None)
    message.answer.assert_called_once_with("No hot trends found yet.")

@pytest.mark.asyncio
async def test_command_hottest_handler_custom_limit(router, mock_storage, allowed_chat_id):
    """
    Test that /hottest command with custom limit correctly passes it to storage.
    """
    # 1. Arrange
    handler = get_handler(router, "command_hottest_handler")
    message = AsyncMock()
    message.chat = MagicMock()
    message.chat.id = int(allowed_chat_id)
    message.answer = AsyncMock()
    
    mock_storage.get_top_ranked.return_value = []
    
    # 2. Act
    command = CommandObject(prefix='/', command='hottest', args='25')
    await handler(message=message, command=command)
    
    # 3. Assert
    mock_storage.get_top_ranked.assert_called_once_with(limit=25, category=None)

@pytest.mark.asyncio
async def test_command_hottest_handler_max_limit(router, mock_storage, allowed_chat_id):
    """
    Test that /hottest command enforces maximum limit.
    """
    # 1. Arrange
    handler = get_handler(router, "command_hottest_handler")
    message = AsyncMock()
    message.chat = MagicMock()
    message.chat.id = int(allowed_chat_id)
    message.answer = AsyncMock()
    
    mock_storage.get_top_ranked.return_value = []
    
    # 2. Act
    command = CommandObject(prefix='/', command='hottest', args='1000')
    await handler(message=message, command=command)
    
    # 3. Assert
    mock_storage.get_top_ranked.assert_called_once_with(limit=50, category=None)

@pytest.mark.asyncio
async def test_command_hottest_handler_invalid_limit(router, mock_storage, allowed_chat_id):
    """
    Test that /hottest command handles invalid limit by falling back to default.
    """
    # 1. Arrange
    handler = get_handler(router, "command_hottest_handler")
    message = AsyncMock()
    message.chat = MagicMock()
    message.chat.id = int(allowed_chat_id)
    message.answer = AsyncMock()
    
    mock_storage.get_top_ranked.return_value = []
    
    # 2. Act
    command = CommandObject(prefix='/', command='hottest', args='invalid')
    await handler(message=message, command=command)
    
    # 3. Assert
    mock_storage.get_top_ranked.assert_called_once_with(limit=10, category='invalid')