"""
Topics Analyzer — анализ тем чата, облако тегов
Только для администраторов
"""
import logging
from aiogram import Router, F
from aiogram.types import Message
from aiogram.filters import Command
from sqlalchemy.ext.asyncio import AsyncSession
from database.db import AsyncSessionLocal
from services.topics_analyzer import TopicsAnalyzer
from utils.decorators import admin_only

logger = logging.getLogger(__name__)

router = Router()


# =============================================================================
# ОБЛАКО ТЕГОВ
# =============================================================================

@router.message(Command('topics'))
@router.message(Command('темы'))
@admin_only
async def cmd_topics(message: Message):
    """
    Показать облако тегов тем чата
    Использование: /topics [дни]
    """
    args = message.text.split()
    days = int(args[1]) if len(args) > 1 and args[1].isdigit() else 7

    async with AsyncSessionLocal() as session:
        analyzer = TopicsAnalyzer(session)
        cloud = await analyzer.get_topics_cloud(days)

    await message.answer(cloud, parse_mode='HTML')


# =============================================================================
# ТОП ТЕМ
# =============================================================================

@router.message(Command('top_topics'))
@router.message(Command('топ_тем'))
@admin_only
async def cmd_top_topics(message: Message):
    """
    Показать топ тем за период
    Использование: /top_topics [дни] [лимит]
    """
    args = message.text.split()
    days = int(args[1]) if len(args) > 1 and args[1].isdigit() else 7
    limit = int(args[2]) if len(args) > 2 and args[2].isdigit() else 5

    async with AsyncSessionLocal() as session:
        analyzer = TopicsAnalyzer(session)
        top = await analyzer.get_top_topics(days, limit)

    if not top:
        await message.answer('ℹ️ Нет данных за указанный период')
        return

    text = f'🔥 <b>Топ тем за {days} дн.</b>\n\n'

    for i, (topic_name, data) in enumerate(top, 1):
        text += f'{i}. {data["emoji"]} {topic_name.capitalize()}: {data["percent"]}% ({data["count"]} сообщ.)\n'

    await message.answer(text, parse_mode='HTML')


# =============================================================================
# СТАТИСТИКА ПО ТЕМЕ
# =============================================================================

@router.message(Command('topic_stats'))
@router.message(Command('статистика_темы'))
@admin_only
async def cmd_topic_stats(message: Message):
    """
    Показать статистику по конкретной теме
    Использование: /topic_stats <тема>
    """
    args = message.text.split()
    if len(args) < 2:
        await message.answer(
            '❌ <b>Использование:</b>\n'
            '<code>/topic_stats &lt;тема&gt;</code>\n\n'
            'Пример: /topic_stats лифты',
            parse_mode='HTML'
        )
        return

    topic = args[1].lower()

    async with AsyncSessionLocal() as session:
        analyzer = TopicsAnalyzer(session)

        # Получаем общую статистику
        stats = await analyzer.get_topics_stats(7)

        if topic not in stats['topics']:
            await message.answer(f'ℹ️ Тема "{topic}" не найдена')
            return

        topic_data = stats['topics'][topic]
        emoji = topic_data['emoji']

        # Получаем тренд
        trend = await analyzer.get_topic_trend(topic, 14)

        text = (
            f'{emoji} <b>Статистика темы: {topic.capitalize()}</b>\n\n'
            f'📊 За 7 дней:\n'
            f'├─ Сообщений: {topic_data["count"]}\n'
            f'└─ Доля: {topic_data["percent"]}%\n\n'
            f'📈 За 14 дней:\n'
            f'└─ Сообщений: {trend["total"]}\n'
        )

        # Тренд по дням
        if trend['daily_counts']:
            text += '\n📅 По дням:\n'
            for date, count in list(trend['daily_counts'].items())[-7:]:
                text += f'  {date}: {count} сообщ.\n'

        await message.answer(text, parse_mode='HTML')


# =============================================================================
# ЕЖЕНЕДЕЛЬНЫЙ ОТЧЁТ
# =============================================================================

@router.message(Command('weekly_report'))
@router.message(Command('недельный_отчёт'))
@admin_only
async def cmd_weekly_report(message: Message):
    """Сформировать еженедельный отчёт по темам"""
    async with AsyncSessionLocal() as session:
        analyzer = TopicsAnalyzer(session)
        report = await analyzer.get_weekly_report()

    await message.answer(report, parse_mode='HTML')


# =============================================================================
# СПИСОК ТЕМ
# =============================================================================

@router.message(Command('topics_list'))
@router.message(Command('список_тем'))
@admin_only
async def cmd_topics_list(message: Message):
    """Показать список всех доступных тем"""
    async with AsyncSessionLocal() as session:
        analyzer = TopicsAnalyzer(session)
        topics = analyzer.topics

    text = '📋 <b>Список тем для классификации</b>\n\n'

    for topic_name, data in sorted(topics.items()):
        text += f'{data["emoji"]} {topic_name.capitalize()}\n'
        text += f'   └─ Ключевые слова: {", ".join(data["keywords"][:5])}...\n'

    text += f'\n💡 Всего тем: {len(topics)}'

    await message.answer(text, parse_mode='HTML')