import sqlite3
import datetime

class Rule:
    def __init__(self, input_pattern, output_pattern):
        self.input_pattern = input_pattern
        self.output_pattern = output_pattern

    def match(self, user_input):
        # Implement matching logic here
        # For example, you can check if the user_input matches the input_pattern
        # using a regular expression or any other suitable matching technique
        return self.input_pattern in user_input

    def update(self, user_input, user_feedback):
        # Implement rule update logic here
        pass

class RuleDB:
    def __init__(self, db_name):
        self.conn = sqlite3.connect(db_name)
        self.cursor = self.conn.cursor()

        # Create rules table if not exists
        self.cursor.execute('''CREATE TABLE IF NOT EXISTS rules
                            (input_pattern TEXT PRIMARY KEY, output_pattern TEXT, last_changed TEXT)''')
        self.conn.commit()

    def add_rule(self, rule):
        # Add rule to the database, handle exceptions if rule already exists
        try:
            self.cursor.execute("INSERT INTO rules (input_pattern, output_pattern, last_changed) VALUES (?, ?, ?)",
                                (rule.input_pattern, rule.output_pattern, str(datetime.datetime.now())))
            self.conn.commit()
        except sqlite3.IntegrityError:
            print("Rule already exists in the database.")

    def update_rule(self, rule):
        # Update the rule in the database
        self.cursor.execute("UPDATE rules SET output_pattern = ?, last_changed = ? WHERE input_pattern = ?",
                            (rule.output_pattern, str(datetime.datetime.now()), rule.input_pattern))
        self.conn.commit()

    def get_rules(self):
        # Retrieve rules from the database
        self.cursor.execute("SELECT input_pattern, output_pattern FROM rules")
        rows = self.cursor.fetchall()
        rules = []
        for row in rows:
            input_pattern, output_pattern = row
            rule = Rule(input_pattern, output_pattern)
            rules.append(rule)
        return rules

class RuleEngine:
    def __init__(self, rule_db):
        self.rules = []
        self.rule_db = rule_db
        # Load rules from database
        self.load_rules_from_db()

    def add_rule(self, rule):
        # Add rule to the RuleDB
        self.rule_db.add_rule(rule)

    def match_rule(self, user_input):
        # Implement rule matching logic here
        # Iterate through the rules and check if the user_input matches any of the input_patterns
        # using the match() method of each rule
        for rule in self.rules:
            if rule.match(user_input):
                return rule
        return None

    def update_rule(self, user_input, user_feedback):
        # Find the matching rule based on user input
        matching_rule = self.match_rule(user_input)
        if matching_rule:
            # Update the matching rule with user feedback
            matching_rule.update(user_input, user_feedback)
            # Update the rule in the RuleDB
            self.rule_db.update_rule(matching_rule)

    def load_rules_from_db(self):
        # Load rules from the RuleDB and populate the rules list
        self.rules = self.rule_db.get_rules()

    def process_message(self, user_input):
        # Implement message processing logic here
        # For example, you can call match_rule() to find the matching rule,
        # and return the corresponding output pattern from the matched rule.
        matching_rule = self.match_rule(user_input)
        if matching_rule:
            return matching_rule.output_pattern