"""
API views for consent-related operations.
"""

from django.http import JsonResponse
from django.views.decorators.http import require_GET
from django.contrib.auth.decorators import login_required
from .models import Patient, ConsentTemplate


@login_required
@require_GET
def get_consent_content(request):
    """
    API endpoint to get consent content based on patient and consent type.
    
    Query Parameters:
        - patient_id: UUID of the patient
        - consent_type: Type of consent (GENERAL_TREATMENT, SERVICE_SPECIFIC, etc.)
        - language: 'en' or 'ar' (optional, defaults to 'en')
    
    Returns:
        JSON response with consent content or error message
    """
    patient_id = request.GET.get('patient_id')
    consent_type = request.GET.get('consent_type')
    language = request.GET.get('language', 'en')
    
    # Validate parameters
    if not patient_id or not consent_type:
        return JsonResponse({
            'success': False,
            'error': 'Missing required parameters: patient_id and consent_type'
        }, status=400)
    
    try:
        # Get patient
        patient = Patient.objects.get(
            id=patient_id,
            tenant=request.user.tenant
        )
    except Patient.DoesNotExist:
        return JsonResponse({
            'success': False,
            'error': 'Patient not found'
        }, status=404)
    
    try:
        # Get the latest active consent template for this type
        template = ConsentTemplate.objects.filter(
            tenant=request.user.tenant,
            consent_type=consent_type,
            is_active=True
        ).order_by('-version').first()
        
        if not template:
            return JsonResponse({
                'success': False,
                'error': f'No consent template found for type: {consent_type}'
            }, status=404)
        
        # Get populated content
        content = template.get_populated_content(patient, language)
        
        return JsonResponse({
            'success': True,
            'content': content,
            'template_id': str(template.id),
            'template_version': template.version,
            'title': template.title_en if language == 'en' else template.title_ar or template.title_en
        })
        
    except Exception as e:
        return JsonResponse({
            'success': False,
            'error': f'Error loading consent template: {str(e)}'
        }, status=500)