# app/modules/prospecting/tasks/scan_tasks.py
"""
Celery tasks for batch prospect scanning and enrichment.
"""

import logging
import time
from datetime import UTC, datetime

from app.core.celery_config import celery_app
from app.modules.prospecting.config import config as prospecting_config
from app.modules.prospecting.models import ProspectScanJob
from app.modules.task_base import ModuleTask

logger = logging.getLogger(__name__)


@celery_app.task(
    bind=True,
    base=ModuleTask,
    name="app.modules.prospecting.tasks.scan_tasks.batch_http_check",
    max_retries=2,
    default_retry_delay=60,
    autoretry_for=(Exception,),
    retry_backoff=True,
    retry_backoff_max=300,
)
def batch_http_check(self, job_id: int, limit: int = 100):
    """Run HTTP connectivity check for pending prospects."""
    with self.get_db() as db:
        job = db.query(ProspectScanJob).filter(ProspectScanJob.id == job_id).first()
        if not job:
            logger.error("Scan job %d not found", job_id)
            return

        job.celery_task_id = self.request.id
        job.status = "running"
        job.started_at = datetime.now(UTC)
        db.flush()

        try:
            from app.modules.prospecting.services.enrichment_service import (
                enrichment_service,
            )
            from app.modules.prospecting.services.prospect_service import (
                prospect_service,
            )

            prospects = prospect_service.get_pending_http_check(db, limit=limit)
            job.total_items = len(prospects)
            db.flush()

            for processed, prospect in enumerate(prospects, 1):
                enrichment_service.check_http(db, prospect)
                job.processed_items = processed
                if processed % 10 == 0:
                    db.flush()
                if processed < len(prospects):
                    time.sleep(prospecting_config.batch_delay_seconds)

            job.status = "completed"
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - background task owns transaction

        except Exception as e:
            logger.error("batch_http_check job %d failed: %s", job_id, e, exc_info=True)
            job.status = "failed"
            job.error_log = str(e)[:500]
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - persist failure status
            raise


@celery_app.task(
    bind=True,
    base=ModuleTask,
    name="app.modules.prospecting.tasks.scan_tasks.batch_tech_scan",
    max_retries=2,
    default_retry_delay=60,
    autoretry_for=(Exception,),
    retry_backoff=True,
    retry_backoff_max=300,
)
def batch_tech_scan(self, job_id: int, limit: int = 100):
    """Run technology scan for pending prospects."""
    with self.get_db() as db:
        job = db.query(ProspectScanJob).filter(ProspectScanJob.id == job_id).first()
        if not job:
            logger.error("Scan job %d not found", job_id)
            return

        job.celery_task_id = self.request.id
        job.status = "running"
        job.started_at = datetime.now(UTC)
        db.flush()

        try:
            from app.modules.prospecting.services.enrichment_service import (
                enrichment_service,
            )
            from app.modules.prospecting.services.prospect_service import (
                prospect_service,
            )

            prospects = prospect_service.get_pending_tech_scan(db, limit=limit)
            job.total_items = len(prospects)
            db.flush()

            successful = 0
            for processed, prospect in enumerate(prospects, 1):
                result = enrichment_service.scan_tech_stack(db, prospect)
                if result:
                    successful += 1
                job.processed_items = processed
                if processed % 10 == 0:
                    db.flush()
                if processed < len(prospects):
                    time.sleep(prospecting_config.batch_delay_seconds)

            job.status = "completed"
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - background task owns transaction

        except Exception as e:
            logger.error("batch_tech_scan job %d failed: %s", job_id, e, exc_info=True)
            job.status = "failed"
            job.error_log = str(e)[:500]
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - persist failure status
            raise


@celery_app.task(
    bind=True,
    base=ModuleTask,
    name="app.modules.prospecting.tasks.scan_tasks.batch_performance_scan",
    max_retries=2,
    default_retry_delay=120,
    autoretry_for=(Exception,),
    retry_backoff=True,
    retry_backoff_max=600,
)
def batch_performance_scan(self, job_id: int, limit: int = 50):
    """Run PageSpeed performance scan for pending prospects."""
    with self.get_db() as db:
        job = db.query(ProspectScanJob).filter(ProspectScanJob.id == job_id).first()
        if not job:
            logger.error("Scan job %d not found", job_id)
            return

        job.celery_task_id = self.request.id
        job.status = "running"
        job.started_at = datetime.now(UTC)
        db.flush()

        try:
            from app.modules.prospecting.services.enrichment_service import (
                enrichment_service,
            )
            from app.modules.prospecting.services.prospect_service import (
                prospect_service,
            )

            prospects = prospect_service.get_pending_performance_scan(db, limit=limit)
            job.total_items = len(prospects)
            db.flush()

            successful = 0
            for processed, prospect in enumerate(prospects, 1):
                result = enrichment_service.scan_performance(db, prospect)
                if result:
                    successful += 1
                job.processed_items = processed
                if processed % 5 == 0:
                    db.flush()
                if processed < len(prospects):
                    time.sleep(prospecting_config.batch_delay_seconds)

            job.status = "completed"
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - background task owns transaction

        except Exception as e:
            logger.error("batch_performance_scan job %d failed: %s", job_id, e, exc_info=True)
            job.status = "failed"
            job.error_log = str(e)[:500]
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - persist failure status
            raise


@celery_app.task(
    bind=True,
    base=ModuleTask,
    name="app.modules.prospecting.tasks.scan_tasks.batch_contact_scrape",
    max_retries=2,
    default_retry_delay=60,
    autoretry_for=(Exception,),
    retry_backoff=True,
    retry_backoff_max=300,
)
def batch_contact_scrape(self, job_id: int, limit: int = 100):
    """Scrape contacts for pending prospects."""
    with self.get_db() as db:
        job = db.query(ProspectScanJob).filter(ProspectScanJob.id == job_id).first()
        if not job:
            logger.error("Scan job %d not found", job_id)
            return

        job.celery_task_id = self.request.id
        job.status = "running"
        job.started_at = datetime.now(UTC)
        db.flush()

        try:
            from app.modules.prospecting.services.enrichment_service import (
                enrichment_service,
            )
            from app.modules.prospecting.services.prospect_service import (
                prospect_service,
            )

            prospects = prospect_service.get_pending_http_check(db, limit=limit)
            # Only scrape those with websites
            prospects = [p for p in prospects if p.has_website]
            job.total_items = len(prospects)
            db.flush()

            for processed, prospect in enumerate(prospects, 1):
                enrichment_service.scrape_contacts(db, prospect)
                job.processed_items = processed
                if processed % 10 == 0:
                    db.flush()
                if processed < len(prospects):
                    time.sleep(prospecting_config.batch_delay_seconds)

            job.status = "completed"
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - background task owns transaction

        except Exception as e:
            logger.error("batch_contact_scrape job %d failed: %s", job_id, e, exc_info=True)
            job.status = "failed"
            job.error_log = str(e)[:500]
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - persist failure status
            raise


@celery_app.task(
    bind=True,
    base=ModuleTask,
    name="app.modules.prospecting.tasks.scan_tasks.batch_score_compute",
    max_retries=1,
    default_retry_delay=30,
)
def batch_score_compute(self, job_id: int, limit: int = 500):
    """Compute or recompute scores for all prospects."""
    with self.get_db() as db:
        job = db.query(ProspectScanJob).filter(ProspectScanJob.id == job_id).first()
        if not job:
            logger.error("Scan job %d not found", job_id)
            return

        job.celery_task_id = self.request.id
        job.status = "running"
        job.started_at = datetime.now(UTC)
        db.flush()

        try:
            from app.modules.prospecting.services.scoring_service import scoring_service

            count = scoring_service.compute_all(db, limit=limit)
            job.processed_items = count
            job.total_items = count
            job.status = "completed"
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - background task owns transaction

        except Exception as e:
            logger.error("batch_score_compute job %d failed: %s", job_id, e, exc_info=True)
            job.status = "failed"
            job.error_log = str(e)[:500]
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - persist failure status
            raise


@celery_app.task(
    bind=True,
    base=ModuleTask,
    name="app.modules.prospecting.tasks.scan_tasks.full_enrichment",
    max_retries=2,
    default_retry_delay=60,
    autoretry_for=(Exception,),
    retry_backoff=True,
)
def full_enrichment(self, job_id: int, prospect_id: int):
    """Run full enrichment pipeline for a single prospect."""
    with self.get_db() as db:
        job = db.query(ProspectScanJob).filter(ProspectScanJob.id == job_id).first()
        if not job:
            logger.error("Scan job %d not found", job_id)
            return

        job.celery_task_id = self.request.id
        job.status = "running"
        job.started_at = datetime.now(UTC)
        job.total_items = 1
        db.flush()

        try:
            from app.modules.prospecting.services.enrichment_service import (
                enrichment_service,
            )
            from app.modules.prospecting.services.prospect_service import (
                prospect_service,
            )
            from app.modules.prospecting.services.scoring_service import scoring_service

            prospect = prospect_service.get_by_id(db, prospect_id)

            # HTTP check
            enrichment_service.check_http(db, prospect)

            # Tech + Performance + Contacts (if has website)
            if prospect.has_website:
                enrichment_service.scan_tech_stack(db, prospect)
                enrichment_service.scan_performance(db, prospect)
                enrichment_service.scrape_contacts(db, prospect)

            # Score
            db.refresh(prospect)
            scoring_service.compute_score(db, prospect)

            job.processed_items = 1
            job.status = "completed"
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - background task owns transaction

        except Exception as e:
            logger.error("full_enrichment job %d failed: %s", job_id, e, exc_info=True)
            job.status = "failed"
            job.error_log = str(e)[:500]
            job.completed_at = datetime.now(UTC)
            db.commit()  # SVC-006 - persist failure status
            raise