modules/database/discourse_mongo_db.py

# modules/database/discourse_mongo_db.py
import matplotlib.pyplot as plt  # Añadir esta importación al inicio
import io
import base64

from .mongo_db import (
    get_collection,
    insert_document, 
    find_documents, 
    update_document, 
    delete_document
)

from datetime import datetime, timezone

import logging

logger = logging.getLogger(__name__)

COLLECTION_NAME = 'student_discourse_analysis'

def fig_to_bytes(fig):
    """Convierte una figura de matplotlib a bytes."""
    try:
        buf = io.BytesIO()
        fig.savefig(buf, format='png', dpi=300, bbox_inches='tight')
        buf.seek(0)
        return buf.getvalue()
    except Exception as e:
        logger.error(f"Error en fig_to_bytes: {str(e)}")
        return None


#################################################################################
def store_student_discourse_result(username, text1, text2, analysis_result):
    """
    Guarda el resultado del análisis de discurso comparativo en MongoDB.
    """
    try:
        # Primero convertir las figuras a bytes
        if 'graph1' in analysis_result:
            try:
                # Convertir y guardar bytes del grafo 1
                graph1_bytes = fig_to_bytes(analysis_result['graph1'])
                if graph1_bytes:
                    analysis_result['graph1_bytes'] = graph1_bytes
                    analysis_result['graph1_base64'] = base64.b64encode(graph1_bytes).decode('utf-8')
                plt.close(analysis_result['graph1'])  # Cerrar la figura
            except Exception as e:
                logger.error(f"Error al procesar gráfico 1: {str(e)}")

        if 'graph2' in analysis_result:
            try:
                # Convertir y guardar bytes del grafo 2
                graph2_bytes = fig_to_bytes(analysis_result['graph2'])
                if graph2_bytes:
                    analysis_result['graph2_bytes'] = graph2_bytes
                    analysis_result['graph2_base64'] = base64.b64encode(graph2_bytes).decode('utf-8')
                plt.close(analysis_result['graph2'])  # Cerrar la figura
            except Exception as e:
                logger.error(f"Error al procesar gráfico 2: {str(e)}")

        # Crear documento para MongoDB
        analysis_document = {
            'username': username,
            'timestamp': datetime.now(timezone.utc).isoformat(),
            'text1': text1,
            'text2': text2,
            'analysis_type': 'discourse',
            'key_concepts1': analysis_result.get('key_concepts1', []),
            'key_concepts2': analysis_result.get('key_concepts2', []),
            'graph1_base64': analysis_result.get('graph1_base64'),
            'graph2_base64': analysis_result.get('graph2_base64'),
        }

        # Insertar en MongoDB
        result = insert_document(COLLECTION_NAME, analysis_document)
        if not result:
            logger.error("No se pudo insertar el documento en MongoDB")
            return False

        logger.info(f"Análisis del discurso guardado con ID: {result} para el usuario: {username}")
        return True

    except Exception as e:
        logger.error(f"Error al guardar el análisis del discurso: {str(e)}")
        return False

#################################################################################
def get_student_discourse_analysis(username, limit=10):
    """
    Recupera los análisis del discurso de un estudiante.
    """
    try:
        # Obtener la colección
        collection = get_collection(COLLECTION_NAME)
        if collection is None:  # Cambiado de if not collection a if collection is None
            logger.error("No se pudo obtener la colección discourse")
            return []

        # Consulta
        query = {
            "username": username,
            "analysis_type": "discourse"
        }
        
        # Campos a recuperar
        projection = {
            "timestamp": 1,
            "combined_graph": 1,
            "_id": 1
        }
        
        # Ejecutar consulta
        try:
            cursor = collection.find(query, projection).sort("timestamp", -1)
            if limit:
                cursor = cursor.limit(limit)
            
            # Convertir cursor a lista
            results = list(cursor)
            logger.info(f"Recuperados {len(results)} análisis del discurso para {username}")
            return results
            
        except Exception as db_error:
            logger.error(f"Error en la consulta a MongoDB: {str(db_error)}")
            return []
        
    except Exception as e:
        logger.error(f"Error recuperando análisis del discurso: {str(e)}")
        return []
#####################################################################################
        
def get_student_discourse_data(username):
    """
    Obtiene un resumen de los análisis del discurso de un estudiante.
    """
    try:
        analyses = get_student_discourse_analysis(username, limit=None)
        formatted_analyses = []
        
        for analysis in analyses:
            formatted_analysis = {
                'timestamp': analysis['timestamp'],
                'text1': analysis.get('text1', ''),
                'text2': analysis.get('text2', ''),
                'key_concepts1': analysis.get('key_concepts1', []),
                'key_concepts2': analysis.get('key_concepts2', [])
            }
            formatted_analyses.append(formatted_analysis)
            
        return {'entries': formatted_analyses}
        
    except Exception as e:
        logger.error(f"Error al obtener datos del discurso: {str(e)}")
        return {'entries': []}

def update_student_discourse_analysis(analysis_id, update_data):
    """
    Actualiza un análisis del discurso existente.
    """
    try:
        query = {"_id": analysis_id}
        update = {"$set": update_data}
        return update_document(COLLECTION_NAME, query, update)
    except Exception as e:
        logger.error(f"Error al actualizar análisis del discurso: {str(e)}")
        return False

def delete_student_discourse_analysis(analysis_id):
    """
    Elimina un análisis del discurso.
    """
    try:
        query = {"_id": analysis_id}
        return delete_document(COLLECTION_NAME, query)
    except Exception as e:
        logger.error(f"Error al eliminar análisis del discurso: {str(e)}")
        return False