import json
import redis.asyncio as redis
from typing import List, Optional
from models import TextTask

class RedisClient:
    def __init__(self, host: str, port: int, task_channel: str, result_channel: str, text_task_channel: str = "text_task_channel"):
        self.client = redis.Redis(host=host, port=port, decode_responses=True)
        self.task_channel = task_channel
        self.result_channel = result_channel
        self.text_task_channel = text_task_channel

    async def get_task(self, timeout=0):
        """Получает задачу из очереди с помощью BLPOP"""
        result = await self.client.blpop(self.task_channel, timeout=timeout)
        if result:
            _, task_json = result
            try:
                return json.loads(task_json)
            except Exception as e:
                print(f"Error parsing task message: {e}")
        return None

    async def get_tasks_batch(self, batch_size: int, timeout: int = 1) -> List[dict]:
        """Получает батч задач из очереди"""
        tasks = []
        result = await self.client.blpop(self.task_channel, timeout=timeout)
        if result:
            _, task_json = result
            try:
                task = json.loads(task_json)
                tasks.append(task)
            except Exception as e:
                print(f"Error parsing task message: {e}")
        
        if tasks:
            for _ in range(batch_size - 1):
                task_json = await self.client.lpop(self.task_channel)
                if not task_json:
                    break
                try:
                    task = json.loads(task_json)
                    tasks.append(task)
                except Exception as e:
                    print(f"Error parsing task message: {e}")
        
        return tasks

    async def publish_result(self, result: dict):
        """Отправляет результат в очередь результатов"""
        await self.client.rpush(self.result_channel, json.dumps(result))
        
    async def send_to_summarize(self, task_data: dict):
        """Отправляет текст в сервис суммаризации"""
        await self.client.rpush(self.text_task_channel, json.dumps(task_data))
        
    async def send_texts_batch(self, tasks: List[TextTask]):
        """Отправляет батч текстов в сервис суммаризации"""
        pipeline = self.client.pipeline()
        for task in tasks:
            task_data = {
                "chat_id": task.chat_id,
                "user_id": task.user_id,
                "message_id": task.message_id,
                "text": task.text
            }
            pipeline.rpush(self.text_task_channel, json.dumps(task_data))
        await pipeline.execute()