from typing import List, Optional
from fastapi import APIRouter, HTTPException, Depends, BackgroundTasks
from sqlalchemy.orm import Session

from config.database import get_db
from models import BulkProcessingJob, CVE, SigmaRule
from schemas import BulkSeedRequest, NomiSecSyncRequest, GitHubPoCSyncRequest, ExploitDBSyncRequest, CISAKEVSyncRequest, ReferenceSyncRequest
from services import CVEService, SigmaRuleService

router = APIRouter(prefix="/api", tags=["bulk-operations"])


@router.post("/bulk-seed")
async def bulk_seed(request: BulkSeedRequest, background_tasks: BackgroundTasks, db: Session = Depends(get_db)):
    """Start bulk seeding operation"""
    from bulk_seeder import BulkSeeder
    
    async def run_bulk_seed():
        try:
            seeder = BulkSeeder(db)
            result = await seeder.full_bulk_seed(
                start_year=request.start_year,
                end_year=request.end_year,
                skip_nvd=request.skip_nvd,
                skip_nomi_sec=request.skip_nomi_sec
            )
            print(f"Bulk seed completed: {result}")
        except Exception as e:
            print(f"Bulk seed failed: {str(e)}")
    
    background_tasks.add_task(run_bulk_seed)
    return {"message": "Bulk seeding started", "status": "running"}


@router.post("/incremental-update")
async def incremental_update(background_tasks: BackgroundTasks, db: Session = Depends(get_db)):
    """Start incremental update using NVD modified/recent feeds"""
    from nvd_bulk_processor import NVDBulkProcessor
    
    async def run_incremental_update():
        try:
            processor = NVDBulkProcessor(db)
            result = await processor.incremental_update()
            print(f"Incremental update completed: {result}")
        except Exception as e:
            print(f"Incremental update failed: {str(e)}")
    
    background_tasks.add_task(run_incremental_update)
    return {"message": "Incremental update started", "status": "running"}


@router.get("/bulk-jobs")
async def get_bulk_jobs(db: Session = Depends(get_db)):
    """Get all bulk processing jobs"""
    jobs = db.query(BulkProcessingJob).order_by(BulkProcessingJob.created_at.desc()).limit(20).all()
    
    result = []
    for job in jobs:
        job_dict = {
            'id': str(job.id),
            'job_type': job.job_type,
            'status': job.status,
            'year': job.year,
            'total_items': job.total_items,
            'processed_items': job.processed_items,
            'failed_items': job.failed_items,
            'error_message': job.error_message,
            'job_metadata': job.job_metadata,
            'started_at': job.started_at,
            'completed_at': job.completed_at,
            'cancelled_at': job.cancelled_at,
            'created_at': job.created_at
        }
        result.append(job_dict)
    
    return result


@router.get("/bulk-status")
async def get_bulk_status(db: Session = Depends(get_db)):
    """Get comprehensive bulk processing status"""
    from bulk_seeder import BulkSeeder
    
    seeder = BulkSeeder(db)
    status = await seeder.get_seeding_status()
    return status


@router.get("/poc-stats")
async def get_poc_stats(db: Session = Depends(get_db)):
    """Get PoC-related statistics"""
    from sqlalchemy import func, text
    
    total_cves = db.query(CVE).count()
    cves_with_pocs = db.query(CVE).filter(CVE.poc_count > 0).count()
    
    # Get PoC quality distribution
    quality_distribution = db.execute(text("""
        SELECT 
            COUNT(*) as total,
            AVG(poc_count) as avg_poc_count,
            MAX(poc_count) as max_poc_count
        FROM cves 
        WHERE poc_count > 0
    """)).fetchone()
    
    # Get rules with PoC data
    total_rules = db.query(SigmaRule).count()
    exploit_based_rules = db.query(SigmaRule).filter(SigmaRule.exploit_based == True).count()
    
    return {
        "total_cves": total_cves,
        "cves_with_pocs": cves_with_pocs,
        "poc_coverage_percentage": round((cves_with_pocs / total_cves * 100), 2) if total_cves > 0 else 0,
        "average_pocs_per_cve": round(quality_distribution.avg_poc_count, 2) if quality_distribution.avg_poc_count else 0,
        "max_pocs_for_single_cve": quality_distribution.max_poc_count or 0,
        "total_rules": total_rules,
        "exploit_based_rules": exploit_based_rules,
        "exploit_based_percentage": round((exploit_based_rules / total_rules * 100), 2) if total_rules > 0 else 0
    }