"""
Job management for tracking async tasks
"""

import time
import threading
import logging
from typing import Dict, Optional, Any

logger = logging.getLogger(__name__)

class JobManager:
    """Manages background job tracking and progress"""
    
    def __init__(self):
        self.active_jobs: Dict[str, Dict] = {}
        self.job_progress: Dict[str, Dict] = {}
        self.job_results: Dict[str, Dict] = {}
        self.jobs_lock = threading.Lock()
        self.progress_lock = threading.Lock()
        self.results_lock = threading.Lock()
        
        # Start cleanup task
        self._start_cleanup_task()
    
    def register_job(self, job_id: str):
        """Register a new job"""
        with self.jobs_lock:
            self.active_jobs[job_id] = {
                'cancelled': False,
                'created_at': time.time(),
                'status': 'active'
            }
        
        with self.progress_lock:
            self.job_progress[job_id] = {
                'stage': 'starting',
                'progress': 0,
                'message': 'Job started...',
                'timestamp': time.time()
            }
        
        logger.info(f"📝 Job registered: {job_id}")
    
    def is_job_cancelled(self, job_id: str) -> bool:
        """Check if a job has been cancelled"""
        with self.jobs_lock:
            return self.active_jobs.get(job_id, {}).get('cancelled', False)
    
    def cancel_job(self, job_id: str) -> bool:
        """Cancel a job"""
        with self.jobs_lock:
            if job_id in self.active_jobs:
                self.active_jobs[job_id]['cancelled'] = True
                self.active_jobs[job_id]['status'] = 'cancelled'
                logger.info(f"❌ Job cancelled: {job_id}")
                return True
        return False
    
    def update_job_progress(self, job_id: str, stage: str, progress: int, message: str):
        """Update job progress"""
        with self.progress_lock:
            if job_id in self.job_progress:
                self.job_progress[job_id] = {
                    'stage': stage,
                    'progress': progress,
                    'message': message,
                    'timestamp': time.time()
                }
                logger.info(f"📊 Job {job_id}: {stage} - {progress}% - {message}")
    
    def get_job_progress(self, job_id: str) -> Optional[Dict]:
        """Get current job progress"""
        with self.progress_lock:
            return self.job_progress.get(job_id)
    
    def complete_job(self, job_id: str, results: Dict[str, Any]):
        """Mark job as completed with results"""
        with self.jobs_lock:
            if job_id in self.active_jobs:
                self.active_jobs[job_id]['status'] = 'completed'
        
        with self.progress_lock:
            self.job_progress[job_id] = {
                'stage': 'completed',
                'progress': 100,
                'message': 'Job completed successfully!',
                'timestamp': time.time()
            }
        
        with self.results_lock:
            self.job_results[job_id] = {
                **results,
                'completed_at': time.time()
            }
        
        logger.info(f"✅ Job completed: {job_id}")
    
    def fail_job(self, job_id: str, error_message: str):
        """Mark job as failed"""
        with self.jobs_lock:
            if job_id in self.active_jobs:
                self.active_jobs[job_id]['status'] = 'failed'
        
        with self.progress_lock:
            self.job_progress[job_id] = {
                'stage': 'error',
                'progress': 0,
                'message': f'Error: {error_message}',
                'timestamp': time.time()
            }
        
        logger.error(f"❌ Job failed: {job_id} - {error_message}")
    
    def get_job_results(self, job_id: str) -> Optional[Dict]:
        """Get job results if completed"""
        with self.results_lock:
            return self.job_results.get(job_id)
    
    def get_active_job_count(self) -> int:
        """Get number of active jobs"""
        with self.jobs_lock:
            return len([j for j in self.active_jobs.values() if j['status'] == 'active'])
    
    def cleanup_old_jobs(self):
        """Clean up jobs older than 30 minutes"""
        current_time = time.time()
        cleanup_age = 1800  # 30 minutes
        
        jobs_to_remove = []
        
        with self.jobs_lock:
            for job_id, job_data in self.active_jobs.items():
                if current_time - job_data['created_at'] > cleanup_age:
                    jobs_to_remove.append(job_id)
        
        for job_id in jobs_to_remove:
            self._remove_job(job_id)
            logger.info(f"🧹 Cleaned up old job: {job_id}")
    
    def _remove_job(self, job_id: str):
        """Remove job from all tracking dictionaries"""
        with self.jobs_lock:
            self.active_jobs.pop(job_id, None)
        
        with self.progress_lock:
            self.job_progress.pop(job_id, None)
        
        with self.results_lock:
            self.job_results.pop(job_id, None)
    
    def _start_cleanup_task(self):
        """Start background cleanup task"""
        def cleanup_worker():
            while True:
                time.sleep(300)  # Run every 5 minutes
                try:
                    self.cleanup_old_jobs()
                except Exception as e:
                    logger.error(f"❌ Error in cleanup task: {str(e)}")
        
        cleanup_thread = threading.Thread(target=cleanup_worker, daemon=True)
        cleanup_thread.start()
        logger.info("🧹 Cleanup task started")