from aiogram import Router
from aiogram.types import Message, InlineKeyboardMarkup, InlineKeyboardButton, CallbackQuery
from aiogram.filters import Command
import aiohttp
from tg_bot.config.settings import settings

router = Router()


async def get_user_collections(telegram_id: str):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(
                f"{settings.BACKEND_URL}/collections/",
                headers={"X-Telegram-ID": telegram_id}
            ) as response:
                if response.status == 200:
                    return await response.json()
                return []
    except Exception as e:
        print(f"Error getting collections: {e}")
        return []


async def get_collection_documents(collection_id: str, telegram_id: str):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(
                f"{settings.BACKEND_URL}/documents/collection/{collection_id}",
                headers={"X-Telegram-ID": telegram_id}
            ) as response:
                if response.status == 200:
                    return await response.json()
                return []
    except Exception as e:
        print(f"Error getting documents: {e}")
        return []


async def search_in_collection(collection_id: str, query: str, telegram_id: str):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(
                f"{settings.BACKEND_URL}/documents/collection/{collection_id}",
                params={"search": query},
                headers={"X-Telegram-ID": telegram_id}
            ) as response:
                if response.status == 200:
                    return await response.json()
                return []
    except Exception as e:
        print(f"Error searching: {e}")
        return []


@router.message(Command("mycollections"))
async def cmd_mycollections(message: Message):
    telegram_id = str(message.from_user.id)
    collections = await get_user_collections(telegram_id)

    if not collections:
        await message.answer(
            "<b>У вас пока нет коллекций</b>\n\n"
            "Обратитесь к администратору для создания коллекций и добавления документов.",
            parse_mode="HTML"
        )
        return

    response = "<b>Ваши коллекции документов:</b>\n\n"
    keyboard_buttons = []
    
    for i, collection in enumerate(collections[:10], 1):
        name = collection.get("name", "Без названия")
        description = collection.get("description", "")
        collection_id = collection.get("collection_id")
        
        response += f"{i}. <b>{name}</b>\n"
        if description:
            response += f"   <i>{description[:50]}...</i>\n"
        response += f"   ID: <code>{collection_id}</code>\n\n"
        
        keyboard_buttons.append([
            InlineKeyboardButton(
                text=f"{name}",
                callback_data=f"collection:{collection_id}"
            )
        ])
    
    keyboard = InlineKeyboardMarkup(inline_keyboard=keyboard_buttons)
    
    response += "<i>Нажмите на коллекцию, чтобы посмотреть документы</i>"
    
    await message.answer(response, parse_mode="HTML", reply_markup=keyboard)


@router.message(Command("search"))
async def cmd_search(message: Message):
    parts = message.text.split(maxsplit=2)
    if len(parts) < 3:
        telegram_id = str(message.from_user.id)
        collections = await get_user_collections(telegram_id)
        
        if not collections:
            await message.answer(
                "<b>Использование:</b> /search &lt;collection_id&gt; &lt;запрос&gt;\n\n"
                "У вас пока нет коллекций. Обратитесь к администратору.",
                parse_mode="HTML"
            )
            return
        
        response = "<b>Выберите коллекцию для поиска:</b>\n\n"
        response += "Использование: /search &lt;collection_id&gt; &lt;запрос&gt;\n\n"
        response += "<b>Доступные коллекции:</b>\n"
        for collection in collections[:5]:
            name = collection.get("name", "Без названия")
            collection_id = collection.get("collection_id")
            response += f"• <b>{name}</b>\n  <code>{collection_id}</code>\n\n"
        response += "Пример: /search " + collections[0].get("collection_id", "")[:8] + "... Как оформить договор?"
        
        await message.answer(response, parse_mode="HTML")
        return

    collection_id = parts[1]
    query = parts[2]
    telegram_id = str(message.from_user.id)

    await message.bot.send_chat_action(message.chat.id, "typing")

    results = await search_in_collection(collection_id, query, telegram_id)

    if not results:
        await message.answer(
            f"<b>Ничего не найдено</b>\n\n"
            f"По запросу <i>\"{query}\"</i> в коллекции ничего не найдено.\n\n"
            f"Попробуйте другой запрос или используйте /mycollections для просмотра доступных коллекций.",
            parse_mode="HTML"
        )
        return

    response = f"<b>Результаты поиска:</b> \"{query}\"\n\n"
    for i, doc in enumerate(results[:5], 1):
        title = doc.get("title", "Без названия")
        content = doc.get("content", "")[:200]
        response += f"{i}. <b>{title}</b>\n"
        response += f"   <i>{content}...</i>\n\n"

    await message.answer(response, parse_mode="HTML")


@router.callback_query(lambda c: c.data.startswith("collection:"))
async def show_collection_documents(callback: CallbackQuery):
    collection_id = callback.data.split(":")[1]
    telegram_id = str(callback.from_user.id)
    
    await callback.answer("Загружаю документы...")
    
    documents = await get_collection_documents(collection_id, telegram_id)
    
    if not documents:
        await callback.message.answer(
            f"<b>Коллекция пуста</b>\n\n"
            f"В этой коллекции пока нет документов.\n"
            f"Обратитесь к администратору для добавления документов.",
            parse_mode="HTML"
        )
        return
    
    response = f"<b>Документы в коллекции:</b>\n\n"
    for i, doc in enumerate(documents[:10], 1):
        title = doc.get("title", "Без названия")
        content_preview = doc.get("content", "")[:100]
        response += f"{i}. <b>{title}</b>\n"
        if content_preview:
            response += f"   <i>{content_preview}...</i>\n"
        response += "\n"
    
    if len(documents) > 10:
        response += f"\n<i>Показано 10 из {len(documents)} документов</i>"
    
    await callback.message.answer(response, parse_mode="HTML")