#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""
ServiceTaskRetriever Usage Example

This script demonstrates how to use the ServiceTaskRetriever class
and the updated MainRedisHandler for direct Redis task retrieval and updates.
"""

import uuid
import logging
from json import dumps

from config import Status, RedisData
from redis_handlers import ServiceTaskRetriever, MainRedisHandler

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

def direct_retriever_example():
    """Example using ServiceTaskRetriever directly"""
    logger.info("=== ServiceTaskRetriever Direct Usage Example ===")
    
    # Create a retriever instance
    retriever = ServiceTaskRetriever()
    
    # Generate a test UUID
    test_uuid = str(uuid.uuid4())
    logger.info(f"Generated test UUID: {test_uuid}")
    
    # Example mail data
    mail_data = {
        "id": "test-mail-123",
        "subject": "Test Mail Subject",
        "body": "This is a test mail body",
        "from": "test@example.com",
        "to": "recipient@example.com",
        "date": "2025-08-09T14:08:05+03:00"
    }
    
    try:
        # Store a new task with UUID
        logger.info("Storing new task with UUID...")
        success = retriever.store_task_with_uuid(
            test_uuid, 
            "MailReader", 
            mail_data
        )
        logger.info(f"Task stored successfully: {success}")
        
        # Retrieve the task by UUID
        logger.info("Retrieving task by UUID...")
        task = retriever.get_task_by_uuid(test_uuid)
        logger.info(f"Retrieved task: service={task.service}, status={task.status}")
        
        # Get service-specific data
        logger.info("Retrieving service data by UUID...")
        mail_reader_data = retriever.get_service_data_by_uuid(test_uuid, "MailReader")
        logger.info(f"Mail subject: {mail_reader_data.get('subject')}")
        
        # Update task status
        logger.info("Updating task status...")
        retriever.update_task_status(
            test_uuid, 
            is_completed=True, 
            status=Status.COMPLETED
        )
        
        # Verify status update
        updated_task = retriever.get_task_by_uuid(test_uuid)
        logger.info(f"Updated task status: {updated_task.status}, completed: {updated_task.is_completed}")
        
        # Update service data
        logger.info("Updating service data...")
        new_mail_data = mail_data.copy()
        new_mail_data["subject"] = "Updated Subject"
        retriever.update_service_data(test_uuid, "MailReader", new_mail_data)
        
        # Verify service data update
        updated_mail_data = retriever.get_service_data_by_uuid(test_uuid, "MailReader")
        logger.info(f"Updated mail subject: {updated_mail_data.get('subject')}")
        
    except FileNotFoundError as e:
        logger.error(f"Not found error: {e}")
    except ValueError as e:
        logger.error(f"Value error: {e}")

def main_handler_example():
    """Example using MainRedisHandler"""
    logger.info("\n=== MainRedisHandler Usage Example ===")
    
    # Create a handler instance
    handler = MainRedisHandler()
    
    # Generate a test UUID
    test_uuid = str(uuid.uuid4())
    logger.info(f"Generated test UUID: {test_uuid}")
    
    # Example mail data
    mail_data = {
        "id": "test-mail-456",
        "subject": "Test Mail via MainRedisHandler",
        "body": "This is a test mail body via MainRedisHandler",
        "from": "test@example.com",
        "to": "recipient@example.com",
        "date": "2025-08-09T14:08:05+03:00"
    }
    
    try:
        # Store a new task with UUID
        logger.info("Storing new task with UUID via MainRedisHandler...")
        success = handler.store_task_with_uuid(
            test_uuid, 
            "MailReader", 
            mail_data
        )
        logger.info(f"Task stored successfully: {success}")
        
        # Retrieve the task by UUID
        logger.info("Retrieving task by UUID...")
        task = handler.get_task_by_uuid(test_uuid)
        logger.info(f"Retrieved task: service={task.service}, status={task.status}")
        
        # Get service-specific data
        logger.info("Retrieving service data by UUID...")
        mail_reader_data = handler.get_service_data_by_uuid(test_uuid, "MailReader")
        logger.info(f"Mail subject: {mail_reader_data.get('subject')}")
        
        # Update task status
        logger.info("Updating task status...")
        handler.update_task_status(
            test_uuid, 
            is_completed=True, 
            status=Status.COMPLETED
        )
        
        # Verify status update
        updated_task = handler.get_task_by_uuid(test_uuid)
        logger.info(f"Updated task status: {updated_task.status}, completed: {updated_task.is_completed}")
        
        # Update service data
        logger.info("Updating service data...")
        new_mail_data = mail_data.copy()
        new_mail_data["subject"] = "Updated Subject via MainRedisHandler"
        handler.update_service_data(test_uuid, "MailReader", new_mail_data)
        
        # Verify service data update
        updated_mail_data = handler.get_service_data_by_uuid(test_uuid, "MailReader")
        logger.info(f"Updated mail subject: {updated_mail_data.get('subject')}")
        
    except FileNotFoundError as e:
        logger.error(f"Not found error: {e}")
    except ValueError as e:
        logger.error(f"Value error: {e}")

def error_handling_example():
    """Example demonstrating error handling"""
    logger.info("\n=== Error Handling Example ===")
    
    retriever = ServiceTaskRetriever()
    
    # Try to retrieve non-existent task
    try:
        logger.info("Attempting to retrieve non-existent task...")
        task = retriever.get_task_by_uuid("non-existent-uuid")
    except FileNotFoundError as e:
        logger.info(f"Expected error caught: {e}")
    
    # Try to update non-existent task
    try:
        logger.info("Attempting to update non-existent task...")
        retriever.update_task_status("non-existent-uuid", True, Status.COMPLETED)
    except FileNotFoundError as e:
        logger.info(f"Expected error caught: {e}")
    
    # Try to update with invalid service name
    test_uuid = str(uuid.uuid4())
    mail_data = {"subject": "Test"}
    retriever.store_task_with_uuid(test_uuid, "MailReader", mail_data)
    
    try:
        logger.info("Attempting to update with invalid service name...")
        retriever.update_service_data(test_uuid, "NonExistentService", {"data": "test"})
    except ValueError as e:
        logger.info(f"Expected error caught: {e}")

if __name__ == "__main__":
    direct_retriever_example()
    main_handler_example()
    error_handling_example()