import logging
from typing import Dict, List

class PerformanceAnalyzer:
    def __init__(self, db_connection):
        self.conn = db_connection

    def analyze_user_performance(self, user_id: str) -> Dict:
        try:
            cursor = self.conn.cursor()
            cursor.execute('''
                SELECT topic, AVG(performance_score) as avg_score 
                FROM study_progress 
                WHERE user_id = ?
                GROUP BY topic
            ''', (user_id,))
            return dict(cursor.fetchall())
        except Exception as e:
            logging.error(f"Erro ao analisar performance: {e}")
            return {}

    def get_weak_areas(self, user_id: str) -> List[str]:
        try:
            cursor = self.conn.cursor()
            cursor.execute('''
                SELECT topic 
                FROM study_progress
                WHERE user_id = ? AND performance_score < 70
                GROUP BY topic
            ''', (user_id,))
            return [row[0] for row in cursor.fetchall()]
        except Exception as e:
            logging.error(f"Erro ao buscar áreas fracas: {e}")
            return []