"""
Core API serializers.
"""

from rest_framework import serializers
from ..models import Tenant, AuditLogEntry, SystemConfiguration, SystemNotification, IntegrationLog


class TenantSerializer(serializers.ModelSerializer):
    """
    Tenant serializer.
    """
    user_count = serializers.ReadOnlyField(source='get_user_count')
    patient_count = serializers.ReadOnlyField(source='get_patient_count')
    is_trial_expired = serializers.ReadOnlyField()
    
    class Meta:
        model = Tenant
        fields = [
            'tenant_id', 'name', 'display_name', 'description',
            'organization_type', 'address_line1', 'address_line2',
            'city', 'state', 'postal_code', 'country',
            'phone_number', 'email', 'website',
            'license_number', 'accreditation_body', 'accreditation_number',
            'accreditation_expiry', 'timezone', 'locale', 'currency',
            'subscription_plan', 'max_users', 'max_patients',
            'is_active', 'is_trial', 'trial_expires_at',
            'user_count', 'patient_count', 'is_trial_expired',
            'created_at', 'updated_at'
        ]
        read_only_fields = ['tenant_id', 'created_at', 'updated_at']


class AuditLogEntrySerializer(serializers.ModelSerializer):
    """
    Audit log entry serializer.
    """
    tenant_name = serializers.CharField(source='tenant.name', read_only=True)
    user_name = serializers.CharField(source='user.get_full_name', read_only=True)
    content_type_name = serializers.CharField(source='content_type.name', read_only=True)
    
    class Meta:
        model = AuditLogEntry
        fields = [
            'log_id', 'tenant', 'tenant_name', 'event_type', 'event_category',
            'user', 'user_name', 'user_email', 'user_role',
            'session_key', 'ip_address', 'user_agent',
            'content_type', 'content_type_name', 'object_id', 'object_repr',
            'action', 'description', 'changes', 'additional_data',
            'patient_id', 'patient_mrn', 'risk_level',
            'hipaa_relevant', 'gdpr_relevant',
            'is_successful', 'error_message',
            'timestamp', 'created_at'
        ]
        read_only_fields = ['log_id', 'created_at']


class SystemConfigurationSerializer(serializers.ModelSerializer):
    """
    System configuration serializer.
    """
    tenant_name = serializers.CharField(source='tenant.name', read_only=True)
    typed_value = serializers.ReadOnlyField(source='get_typed_value')
    updated_by_name = serializers.CharField(source='updated_by.get_full_name', read_only=True)
    
    class Meta:
        model = SystemConfiguration
        fields = [
            'id', 'tenant', 'tenant_name', 'key', 'value', 'data_type',
            'category', 'description', 'validation_rules', 'default_value',
            'is_sensitive', 'is_encrypted', 'required_permission',
            'is_active', 'is_readonly', 'typed_value',
            'created_at', 'updated_at', 'updated_by', 'updated_by_name'
        ]
        read_only_fields = ['created_at', 'updated_at']


class SystemNotificationSerializer(serializers.ModelSerializer):
    """
    System notification serializer.
    """
    tenant_name = serializers.CharField(source='tenant.name', read_only=True)
    created_by_name = serializers.CharField(source='created_by.get_full_name', read_only=True)
    is_visible = serializers.ReadOnlyField()
    
    class Meta:
        model = SystemNotification
        fields = [
            'notification_id', 'tenant', 'tenant_name', 'title', 'message',
            'notification_type', 'priority', 'target_audience',
            'target_roles', 'is_dismissible', 'auto_dismiss_after',
            'show_on_login', 'start_date', 'end_date',
            'action_url', 'action_text', 'is_active', 'is_visible',
            'created_at', 'created_by', 'created_by_name'
        ]
        read_only_fields = ['notification_id', 'created_at']


class IntegrationLogSerializer(serializers.ModelSerializer):
    """
    Integration log serializer.
    """
    tenant_name = serializers.CharField(source='tenant.name', read_only=True)
    
    class Meta:
        model = IntegrationLog
        fields = [
            'log_id', 'tenant', 'tenant_name', 'integration_type', 'direction',
            'external_system', 'endpoint', 'message_type', 'message_id',
            'correlation_id', 'request_data', 'response_data',
            'status', 'error_code', 'error_message',
            'processing_time_ms', 'timestamp', 'created_at'
        ]
        read_only_fields = ['log_id', 'created_at']