#modules/database/sql_db.py

from .database_init import get_container
from datetime import datetime, timezone
import logging
import bcrypt
import uuid

logger = logging.getLogger(__name__)

def get_user(username, role=None):
    container = get_container("users")
    try:
        query = f"SELECT * FROM c WHERE c.id = '{username}'"
        if role:
            query += f" AND c.role = '{role}'"
        items = list(container.query_items(
            query=query,
            enable_cross_partition_query=True
        ))
        return items[0] if items else None
    except Exception as e:
        logger.error(f"Error al obtener usuario {username}: {str(e)}")
        return None

def get_admin_user(username):
    return get_user(username, role='Administrador')

def get_student_user(username):
    return get_user(username, role='Estudiante')

def get_teacher_user(username):
    return get_user(username, role='Profesor')

#################################################################################
#El error ocurre porque el parámetro `partition_key` 
#no es soportado en la versión actual del SDK. 
#Modifiquemos la función `create_user()` para incluir la partición en el cuerpo del documento:

def create_user(username, password, role, additional_info=None):
    container = get_container("users")
    if not container:
        logger.error("No se pudo obtener el contenedor de usuarios")
        return False
        
    try:
        # Generar salt y hash de la contraseña
        salt = bcrypt.gensalt()
        hashed = bcrypt.hashpw(password.encode('utf-8'), salt)
        
        user_data = {
            'id': username,
            'password': hashed.decode('utf-8'),
            'salt': salt.decode('utf-8'),
            'role': role,
            'timestamp': datetime.now(timezone.utc).isoformat(),
            'additional_info': additional_info or {},
            # La partición va dentro del documento
            'partitionKey': username
        }
        
        container.create_item(body=user_data)
        logger.info(f"Usuario {role} creado: {username}")
        return True
        
    except Exception as e:
        logger.error(f"Error al crear usuario {role}: {str(e)}")
        return False

#########################################################################
def create_student_user(username, password, additional_info=None):
    return create_user(username, password, 'Estudiante', additional_info)

def create_teacher_user(username, password, additional_info=None):
    return create_user(username, password, 'Profesor', additional_info)

def create_admin_user(username, password, additional_info=None):
    return create_user(username, password, 'Administrador', additional_info)

############-- Funciones de control del tiempo de sesión ##################

###########################################################

def record_login(username):
    """Registra el inicio de sesión de un usuario"""
    try:
        container = get_container("users_sessions")
        if not container:
            logger.error("No se pudo obtener el contenedor users_sessions")
            return None

        session_id = str(uuid.uuid4())
        session_doc = {
            "id": session_id,
            "type": "session",
            "username": username,
            "loginTime": datetime.now(timezone.utc).isoformat(),
            "additional_info": {},
            # El campo para partition key debe estar en el documento
            "partitionKey": username
        }

        # Crear el documento usando options
        result = container.create_item(
            body=session_doc,
            enable_cross_partition_query=True
        )
        logger.info(f"Sesión {session_id} registrada para {username}")
        return session_id
    except Exception as e:
        logger.error(f"Error registrando login: {str(e)}")
        return None


###########################################################

def record_logout(username, session_id):
    """Registra el cierre de sesión y calcula la duración"""
    try:
        container = get_container("users_sessions")
        if not container:
            logger.error("No se pudo obtener el contenedor users_sessions")
            return False

        # Obtener la sesión actual
        query = "SELECT * FROM c WHERE c.id = @id AND c.username = @username"
        params = [
            {"name": "@id", "value": session_id},
            {"name": "@username", "value": username}
        ]
        
        items = list(container.query_items(
            query=query,
            parameters=params,
            enable_cross_partition_query=True
        ))

        if not items:
            logger.warning(f"Sesión no encontrada: {session_id}")
            return False

        session = items[0]
        login_time = datetime.fromisoformat(session['loginTime'].rstrip('Z'))
        logout_time = datetime.now(timezone.utc)
        duration = int((logout_time - login_time).total_seconds())

        session.update({
            "logoutTime": logout_time.isoformat(),
            "sessionDuration": duration
        })

        # Actualizar el documento
        container.upsert_item(
            body=session
        )
        logger.info(f"Sesión {session_id} cerrada para {username}, duración: {duration}s")
        return True
    except Exception as e:
        logger.error(f"Error registrando logout: {str(e)}")
        return False


###########################################################

def get_recent_sessions(limit=10):
    """Obtiene las sesiones más recientes"""
    try:
        container = get_container("users_sessions")
        if not container:
            logger.error("No se pudo obtener el contenedor users_sessions")
            return []

        query = """
        SELECT c.username, c.loginTime, c.logoutTime, c.sessionDuration
        FROM c
        WHERE c.type = 'session'
        ORDER BY c.loginTime DESC
        OFFSET 0 LIMIT @limit
        """
        
        sessions = list(container.query_items(
            query=query,
            parameters=[{"name": "@limit", "value": limit}],
            enable_cross_partition_query=True
        ))

        # Validar y limpiar los datos
        clean_sessions = []
        for session in sessions:
            try:
                clean_sessions.append({
                    "username": session["username"],
                    "loginTime": session["loginTime"],
                    "logoutTime": session.get("logoutTime", "Activo"),
                    "sessionDuration": session.get("sessionDuration", 0)
                })
            except KeyError as e:
                logger.warning(f"Sesión con datos incompletos: {e}")
                continue

        return clean_sessions
    except Exception as e:
        logger.error(f"Error obteniendo sesiones recientes: {str(e)}")
        return []



###########################################################

def get_user_total_time(username):
    """Obtiene el tiempo total que un usuario ha pasado en la plataforma"""
    try:
        container = get_container("users_sessions")
        if not container:
            return None

        query = """
        SELECT VALUE SUM(c.sessionDuration)
        FROM c
        WHERE c.type = 'session'
        AND c.username = @username
        AND IS_DEFINED(c.sessionDuration)
        """
        
        result = list(container.query_items(
            query=query,
            parameters=[{"name": "@username", "value": username}],
            enable_cross_partition_query=True
        ))

        return result[0] if result and result[0] is not None else 0
    except Exception as e:
        logger.error(f"Error obteniendo tiempo total: {str(e)}")
        return 0

###########################################################
def update_student_user(username, new_info):
    user_container, _, _ = get_sql_containers()
    try:
        user = get_student_user(username)
        if user:
            user['additional_info'].update(new_info)
            user_container.upsert_item(body=user)
            logger.info(f"Información del estudiante actualizada: {username}")
            return True
        else:
            logger.warning(f"Intento de actualizar estudiante no existente: {username}")
            return False
    except Exception as e:
        logger.error(f"Error al actualizar información del estudiante {username}: {str(e)}")
        return False


def delete_student_user(username):
    user_container, _, _ = get_sql_containers()
    try:
        user = get_student_user(username)
        if user:
            user_container.delete_item(item=user['id'], partition_key=username)
            logger.info(f"Estudiante eliminado: {username}")
            return True
        else:
            logger.warning(f"Intento de eliminar estudiante no existente: {username}")
            return False
    except Exception as e:
        logger.error(f"Error al eliminar estudiante {username}: {str(e)}")
        return False

def store_application_request(name, lastname, email, institution, current_role, desired_role, reason):
    _, application_requests_container, _ = get_sql_containers()
    try:
        application_request = {
            "id": str(uuid.uuid4()),
            "name": name,
            "lastname": lastname,
            "email": email,
            "institution": institution,
            "current_role": current_role,
            "desired_role": desired_role,
            "reason": reason,
            "requestDate": datetime.utcnow().isoformat()
        }
        application_requests_container.create_item(body=application_request)
        logger.info(f"Solicitud de aplicación almacenada para el email: {email}")
        return True
    except Exception as e:
        logger.error(f"Error al almacenar la solicitud de aplicación: {str(e)}")
        return False

def store_student_feedback(username, name, email, feedback):
    _, _, user_feedback_container = get_sql_containers()
    try:
        feedback_item = {
            "id": str(uuid.uuid4()),
            "username": username,
            "name": name,
            "email": email,
            "feedback": feedback,
            "role": "Estudiante",
            'timestamp': datetime.now(timezone.utc).isoformat(),
        }
        result = user_feedback_container.create_item(body=feedback_item)
        logger.info(f"Feedback de estudiante almacenado con ID: {result['id']} para el usuario: {username}")
        return True
    except Exception as e:
        logger.error(f"Error al almacenar el feedback del estudiante {username}: {str(e)}")
        return False