#coding:utf8
from collections import deque
from kafka import KafkaProducer
import json
from config_loader import load_config

# 加载配置
config = load_config()

# 创建全局双向队列实例
task_queue = deque()

def add_task(task):
    """将任务添加到队列尾部
    """
    task_queue.append(task)

def add_task_left(task):
    """将任务添加到队列头部
    """
    task_queue.appendleft(task)

def get_task():
    """从队列头部获取任务
    """
    return task_queue.popleft()

def get_task_right():
    """从队列尾部获取任务
    """
    return task_queue.pop()

def get_size():
    """获取队列长度
    :return:
    """
    return len(task_queue)

def task_done(result):
    """标记任务完成并将结果发送到 Kafka"""
    # 初始化 Kafka 生产者
    producer = KafkaProducer(
        bootstrap_servers=config['kafka']['bootstrap_servers'],
        value_serializer=lambda v: json.dumps(v).encode('utf-8')
    )
    producer.send(config['kafka']['topic'], result)
    producer.flush()
    producer.close()