"""
Weibo-HotSign Sign-in Task Definitions
Celery tasks for scheduled sign-in operations
"""

import asyncio
import httpx
import json
import logging
from datetime import datetime
from typing import Dict, Any, Optional

from celery import current_task
from ..celery_app import celery_app
from ..config import settings

# Configure logger
logger = logging.getLogger(__name__)

@celery_app.task(bind=True, max_retries=3, default_retry_delay=60)
def execute_signin_task(self, task_id: str, account_id: str, cron_expression: str):
    """
    Execute scheduled sign-in task for a specific account
    This task is triggered by Celery Beat based on cron schedule
    """
    logger.info(f"🎯 Starting sign-in task {task_id} for account {account_id}")
    
    try:
        # Update task status
        current_task.update_state(
            state="PROGRESS",
            meta={
                "current": 10,
                "total": 100,
                "status": "Initializing sign-in process...",
                "account_id": account_id
            }
        )
        
        # Call signin executor service
        result = _call_signin_executor(account_id, task_id)
        
        # Update task status
        current_task.update_state(
            state="SUCCESS",
            meta={
                "current": 100,
                "total": 100,
                "status": "Sign-in completed successfully",
                "result": result,
                "account_id": account_id
            }
        )
        
        logger.info(f"✅ Sign-in task {task_id} completed successfully for account {account_id}")
        return result
        
    except Exception as exc:
        logger.error(f"❌ Sign-in task {task_id} failed for account {account_id}: {exc}")
        
        # Retry logic
        if self.request.retries < settings.MAX_RETRY_ATTEMPTS:
            logger.info(f"🔄 Retrying task {task_id} (attempt {self.request.retries + 1})")
            raise self.retry(exc=exc, countdown=settings.RETRY_DELAY_SECONDS)
        
        # Final failure
        current_task.update_state(
            state="FAILURE",
            meta={
                "current": 100,
                "total": 100,
                "status": f"Task failed after {settings.MAX_RETRY_ATTEMPTS} attempts",
                "error": str(exc),
                "account_id": account_id
            }
        )
        raise exc

@celery_app.task
def schedule_daily_signin():
    """
    Daily sign-in task - example of scheduled task
    Can be configured in Celery Beat schedule
    """
    logger.info("📅 Executing daily sign-in schedule")
    
    # This would typically query database for accounts that need daily sign-in
    # For demo purposes, we'll simulate processing multiple accounts
    
    accounts = ["account_1", "account_2", "account_3"]  # Mock account IDs
    results = []
    
    for account_id in accounts:
        try:
            # Submit individual sign-in task for each account
            task = execute_signin_task.delay(
                task_id=f"daily_{datetime.now().strftime('%Y%m%d_%H%M%S')}",
                account_id=account_id,
                cron_expression="0 8 * * *"  # Daily at 8 AM
            )
            results.append({
                "account_id": account_id,
                "task_id": task.id,
                "status": "submitted"
            })
        except Exception as e:
            logger.error(f"Failed to submit task for account {account_id}: {e}")
            results.append({
                "account_id": account_id,
                "status": "failed",
                "error": str(e)
            })
    
    return {
        "scheduled_date": datetime.now().isoformat(),
        "accounts_processed": len(accounts),
        "results": results
    }

@celery_app.task
def process_pending_tasks():
    """
    Process pending sign-in tasks from database
    This can be called manually or via external trigger
    """
    logger.info("🔄 Processing pending sign-in tasks from database")
    
    # In real implementation, this would:
    # 1. Query database for tasks that need to be executed
    # 2. Check if they're due based on cron expressions
    # 3. Submit them to Celery for execution
    
    try:
        # Mock implementation - query enabled tasks
        result = {
            "processed_at": datetime.now().isoformat(),
            "tasks_found": 5,  # Mock number
            "tasks_submitted": 3,
            "tasks_skipped": 2,
            "status": "completed"
        }
        
        logger.info(f"✅ Processed pending tasks: {result}")
        return result
        
    except Exception as e:
        logger.error(f"❌ Failed to process pending tasks: {e}")
        raise

def _call_signin_executor(account_id: str, task_id: str) -> Dict[str, Any]:
    """
    Call the signin executor service to perform actual sign-in
    """
    try:
        signin_data = {
            "task_id": task_id,
            "account_id": account_id,
            "timestamp": datetime.now().isoformat(),
            "requested_by": "task_scheduler"
        }
        
        # Call signin executor service
        with httpx.Client(timeout=30.0) as client:
            response = client.post(
                f"{settings.SIGNIN_EXECUTOR_URL}/api/v1/signin/execute",
                json=signin_data
            )
            
            if response.status_code == 200:
                result = response.json()
                logger.info(f"Sign-in executor response: {result}")
                return result
            else:
                raise Exception(f"Sign-in executor returned error: {response.status_code} - {response.text}")
                
    except httpx.RequestError as e:
        logger.error(f"Network error calling signin executor: {e}")
        raise Exception(f"Failed to connect to signin executor: {e}")
    except Exception as e:
        logger.error(f"Error calling signin executor: {e}")
        raise

# Periodic task definitions for Celery Beat
celery_app.conf.beat_schedule = {
    "daily-signin-at-8am": {
        "task": "app.tasks.signin_tasks.schedule_daily_signin",
        "schedule": {
            "hour": 8,
            "minute": 0,
        },
    },
    "process-pending-every-15-minutes": {
        "task": "app.tasks.signin_tasks.process_pending_tasks", 
        "schedule": 900.0,  # Every 15 minutes
    },
}