# db_utils.py

import aiosqlite
import config

async def initialize_database():
    async with aiosqlite.connect(config.DATABASE_NAME) as db:
        await db.execute("""
            CREATE TABLE IF NOT EXISTS cache (
                short_id TEXT PRIMARY KEY,
                file_id TEXT,
                filename TEXT,
                type TEXT,
                size INTEGER
            )
        """)
        await db.execute("""
            CREATE TABLE IF NOT EXISTS users (
                user_id INTEGER PRIMARY KEY,
                username TEXT,
                first_name TEXT
            )
        """)
        await db.commit()

async def add_or_update_user_db(user_id, username, first_name):
    async with aiosqlite.connect(config.DATABASE_NAME) as db:
        await db.execute("""
            INSERT OR REPLACE INTO users (user_id, username, first_name)
            VALUES (?, ?, ?)
        """, (user_id, username, first_name))
        await db.commit()

async def get_cached_file(short_id):
    async with aiosqlite.connect(config.DATABASE_NAME) as db:
        async with db.execute("""
            SELECT file_id, filename, type, size FROM cache WHERE short_id = ?
        """, (short_id,)) as cursor:
            row = await cursor.fetchone()
            if row:
                return {"file_id": row[0], "name": row[1], "type": row[2], "size": row[3]}
            return None

async def add_to_cache(short_id, file_id, filename, filetype, size):
    async with aiosqlite.connect(config.DATABASE_NAME) as db:
        await db.execute("""
            INSERT OR REPLACE INTO cache (short_id, file_id, filename, type, size)
            VALUES (?, ?, ?, ?, ?)
        """, (short_id, file_id, filename, filetype, size))
        await db.commit()