"""
Celery tasks for contact submission notifications.
"""
from celery import shared_task
from django.core.mail import send_mail
from django.conf import settings
from django.template.loader import render_to_string
from django.utils.html import strip_tags


@shared_task
def send_contact_confirmation_email(contact_id):
    """
    Send confirmation email to user who submitted contact form.
    
    Args:
        contact_id: UUID of the ContactSubmission
    """
    from .models import ContactSubmission
    
    try:
        contact = ContactSubmission.objects.get(id=contact_id)
        
        # Render email template
        html_message = render_to_string('emails/contact_confirmation.html', {
            'name': contact.name,
            'ticket_number': contact.ticket_number,
            'subject': contact.subject,
            'category': contact.get_category_display(),
            'message': contact.message,
        })
        plain_message = strip_tags(html_message)
        
        # Send email
        send_mail(
            subject=f'Contact Form Received - Ticket #{contact.ticket_number}',
            message=plain_message,
            from_email=settings.DEFAULT_FROM_EMAIL,
            recipient_list=[contact.email],
            html_message=html_message,
            fail_silently=False,
        )
        
        return f"Confirmation email sent to {contact.email}"
        
    except ContactSubmission.DoesNotExist:
        return f"Contact submission {contact_id} not found"
    except Exception as e:
        # Log error but don't fail the task
        print(f"Error sending contact confirmation: {str(e)}")
        raise


@shared_task
def notify_admins_new_contact(contact_id):
    """
    Notify admin team of new contact submission.
    
    Args:
        contact_id: UUID of the ContactSubmission
    """
    from .models import ContactSubmission
    from apps.users.models import User
    
    try:
        contact = ContactSubmission.objects.get(id=contact_id)
        
        # Get all admin and moderator emails
        admin_emails = User.objects.filter(
            role__in=['admin', 'moderator']
        ).values_list('email', flat=True)
        
        if not admin_emails:
            return "No admin emails found"
        
        # Render email template
        html_message = render_to_string('emails/contact_admin_notification.html', {
            'ticket_number': contact.ticket_number,
            'name': contact.name,
            'email': contact.email,
            'subject': contact.subject,
            'category': contact.get_category_display(),
            'message': contact.message,
            'admin_url': f"{settings.SITE_URL}/admin/contact/contactsubmission/{contact.id}/change/",
        })
        plain_message = strip_tags(html_message)
        
        # Send email
        send_mail(
            subject=f'New Contact Submission - Ticket #{contact.ticket_number}',
            message=plain_message,
            from_email=settings.DEFAULT_FROM_EMAIL,
            recipient_list=list(admin_emails),
            html_message=html_message,
            fail_silently=False,
        )
        
        return f"Admin notification sent to {len(admin_emails)} admin(s)"
        
    except ContactSubmission.DoesNotExist:
        return f"Contact submission {contact_id} not found"
    except Exception as e:
        # Log error but don't fail the task
        print(f"Error sending admin notification: {str(e)}")
        raise


@shared_task
def send_contact_resolution_email(contact_id):
    """
    Send email to user when their contact submission is resolved.
    
    Args:
        contact_id: UUID of the ContactSubmission
    """
    from .models import ContactSubmission
    
    try:
        contact = ContactSubmission.objects.get(id=contact_id)
        
        if contact.status != 'resolved':
            return f"Contact {contact_id} is not resolved yet"
        
        # Render email template
        html_message = render_to_string('emails/contact_resolved.html', {
            'name': contact.name,
            'ticket_number': contact.ticket_number,
            'subject': contact.subject,
            'resolved_by': contact.resolved_by.username if contact.resolved_by else 'Support Team',
        })
        plain_message = strip_tags(html_message)
        
        # Send email
        send_mail(
            subject=f'Your Support Ticket Has Been Resolved - #{contact.ticket_number}',
            message=plain_message,
            from_email=settings.DEFAULT_FROM_EMAIL,
            recipient_list=[contact.email],
            html_message=html_message,
            fail_silently=False,
        )
        
        return f"Resolution email sent to {contact.email}"
        
    except ContactSubmission.DoesNotExist:
        return f"Contact submission {contact_id} not found"
    except Exception as e:
        # Log error but don't fail the task
        print(f"Error sending resolution email: {str(e)}")
        raise