import sqlite3
import json
import time
import requests
from typing import Any, Optional

class CacheManager:
    def __init__(self, db_name: str = 'pokemon_cache.db'):
        self.conn = sqlite3.connect(db_name)
        self.cursor = self.conn.cursor()
        self._create_cache_table()

    def _create_cache_table(self):
        self.cursor.execute('''
            CREATE TABLE IF NOT EXISTS cache (
                key TEXT PRIMARY KEY,
                value TEXT,
                timestamp FLOAT
            )
        ''')
        self.conn.commit()

    def get(self, key: str) -> Optional[Any]:
        self.cursor.execute('SELECT value, timestamp FROM cache WHERE key = ?', (key,))
        result = self.cursor.fetchone()
        if result:
            value, timestamp = result
            return json.loads(value)
        return None

    def set(self, key: str, value: Any):
        serialized_value = json.dumps(value)
        timestamp = time.time()
        self.cursor.execute('''
            INSERT OR REPLACE INTO cache (key, value, timestamp)
            VALUES (?, ?, ?)
        ''', (key, serialized_value, timestamp))
        self.conn.commit()

    def fetch_url(self, url: str, force_refresh: bool = False, expiry: int = 86400) -> Optional[str]:
        cache_key = f"url_{url}"
        if not force_refresh:
            cached_data = self.get(cache_key)
            if cached_data:
                cached_time = cached_data['timestamp']
                if time.time() - cached_time < expiry:
                    return cached_data['content']

        print(f"Fetching URL: {url}")
        response = requests.get(url)
        if response.status_code == 200:
            content = response.text
            self.set(cache_key, {
                'content': content,
                'timestamp': time.time()
            })
            return content
        return None

    def close(self):
        self.conn.close()

# Usage example
if __name__ == "__main__":
    cache = CacheManager()

    # Example usage
    url = "https://example.com"
    data = cache.fetch_url(url)
    if data:
        print("Data fetched successfully")
    else:
        print("Failed to fetch data")

    cache.close()