import logging

from celery import shared_task
from django.core.mail import send_mail
from django.template.loader import render_to_string
from django.conf import settings

logger = logging.getLogger('notifications')


@shared_task
def send_scrape_notification(job_id: int):
    """
    Send email notification after scraper job.
    """
    from scraper.models import ScrapeJob, ManualReviewItem
    from notifications.models import EmailConfiguration, EmailLog

    try:
        job = ScrapeJob.objects.select_related('config__sport').get(id=job_id)
    except ScrapeJob.DoesNotExist:
        logger.error(f"ScrapeJob {job_id} not found")
        return

    # Get email configuration
    config = EmailConfiguration.objects.filter(is_enabled=True).first()
    if not config:
        logger.info("No email configuration enabled")
        return

    # Check if we should send based on configuration
    if job.status == 'completed' and not config.notify_on_scrape_complete:
        return
    if job.status == 'failed' and not config.notify_on_scrape_failure:
        return

    # Check minimum games threshold
    total_changes = job.games_new + job.games_updated
    if job.status == 'completed' and total_changes < config.min_games_for_notification:
        logger.info(f"Skipping notification: {total_changes} changes below threshold {config.min_games_for_notification}")
        return

    # Get review items if configured
    review_items = []
    if config.notify_on_new_reviews and job.review_items_created > 0:
        review_items = list(
            ManualReviewItem.objects.filter(job=job)
            .values('raw_value', 'item_type', 'suggested_id', 'confidence', 'reason')[:10]
        )

    # Build context
    context = {
        'job': job,
        'sport': job.config.sport,
        'season_display': job.config.sport.get_season_display(job.config.season),
        'review_items': review_items,
        'suggested_actions': get_suggested_actions(job),
    }

    # Render email
    subject = f"[SportsTime] {job.config.sport.short_name} Scraper: {job.status.upper()}"
    if job.status == 'completed':
        subject = f"[SportsTime] {job.config.sport.short_name}: {job.games_new} new, {job.games_updated} updated"

    html_body = render_to_string('notifications/emails/scrape_report.html', context)
    text_body = render_to_string('notifications/emails/scrape_report.txt', context)

    # Send email
    recipients = config.get_recipients()
    try:
        send_mail(
            subject=subject,
            message=text_body,
            from_email=settings.DEFAULT_FROM_EMAIL,
            recipient_list=recipients,
            html_message=html_body,
            fail_silently=False,
        )

        # Log success
        EmailLog.objects.create(
            configuration=config,
            subject=subject,
            recipients=','.join(recipients),
            body_preview=text_body[:500],
            status='sent',
            scrape_job=job,
        )
        logger.info(f"Sent scrape notification for job {job_id}")

    except Exception as e:
        # Log failure
        EmailLog.objects.create(
            configuration=config,
            subject=subject,
            recipients=','.join(recipients),
            body_preview=text_body[:500],
            status='failed',
            error_message=str(e),
            scrape_job=job,
        )
        logger.error(f"Failed to send scrape notification: {e}")


@shared_task
def send_sync_notification(job_id: int):
    """
    Send email notification after CloudKit sync.
    """
    from cloudkit.models import CloudKitSyncJob
    from notifications.models import EmailConfiguration, EmailLog

    try:
        job = CloudKitSyncJob.objects.select_related('configuration').get(id=job_id)
    except CloudKitSyncJob.DoesNotExist:
        logger.error(f"CloudKitSyncJob {job_id} not found")
        return

    # Get email configuration
    config = EmailConfiguration.objects.filter(is_enabled=True).first()
    if not config:
        return

    # Check if we should send
    if job.status == 'completed' and not config.notify_on_sync_complete:
        return
    if job.status == 'failed' and not config.notify_on_sync_failure:
        return

    # Build email
    subject = f"[SportsTime] CloudKit Sync: {job.status.upper()}"
    if job.status == 'completed':
        subject = f"[SportsTime] CloudKit Sync: {job.records_synced} records"

    context = {
        'job': job,
    }

    html_body = render_to_string('notifications/emails/sync_report.html', context)
    text_body = render_to_string('notifications/emails/sync_report.txt', context)

    recipients = config.get_recipients()
    try:
        send_mail(
            subject=subject,
            message=text_body,
            from_email=settings.DEFAULT_FROM_EMAIL,
            recipient_list=recipients,
            html_message=html_body,
            fail_silently=False,
        )

        EmailLog.objects.create(
            configuration=config,
            subject=subject,
            recipients=','.join(recipients),
            body_preview=text_body[:500],
            status='sent',
            sync_job=job,
        )

    except Exception as e:
        EmailLog.objects.create(
            configuration=config,
            subject=subject,
            recipients=','.join(recipients),
            body_preview=text_body[:500],
            status='failed',
            error_message=str(e),
            sync_job=job,
        )
        logger.error(f"Failed to send sync notification: {e}")


@shared_task
def send_test_notification(config_id: int):
    """
    Send a test notification email.
    """
    from notifications.models import EmailConfiguration, EmailLog

    try:
        config = EmailConfiguration.objects.get(id=config_id)
    except EmailConfiguration.DoesNotExist:
        return

    subject = "[SportsTime] Test Notification"
    body = "This is a test notification from SportsTime.\n\nIf you received this, email notifications are working correctly."

    recipients = config.get_recipients()
    try:
        send_mail(
            subject=subject,
            message=body,
            from_email=settings.DEFAULT_FROM_EMAIL,
            recipient_list=recipients,
            fail_silently=False,
        )

        EmailLog.objects.create(
            configuration=config,
            subject=subject,
            recipients=','.join(recipients),
            body_preview=body,
            status='sent',
        )
        logger.info(f"Sent test notification to {recipients}")

    except Exception as e:
        EmailLog.objects.create(
            configuration=config,
            subject=subject,
            recipients=','.join(recipients),
            body_preview=body,
            status='failed',
            error_message=str(e),
        )
        logger.error(f"Failed to send test notification: {e}")


def get_suggested_actions(job):
    """
    Generate suggested actions based on job results.
    """
    actions = []

    if job.review_items_created > 0:
        actions.append(f"Review {job.review_items_created} items in the review queue")

    if job.games_errors > 0:
        actions.append(f"Investigate {job.games_errors} game processing errors")

    if job.status == 'failed':
        actions.append("Check scraper logs for error details")
        actions.append("Verify data source availability")

    if job.games_found == 0 and job.status == 'completed':
        actions.append("Verify scraper configuration and season dates")

    return actions