import asyncio
import os
from agents import Agent, Runner
from agents.extensions.memory import RedisSession
import dotenv
import redis.asyncio as aioredis

dotenv.load_dotenv()
Redis_url = os.getenv("REDIS_URL")


#===============transformers================
from transformers import pipeline
import re
from datetime import datetime
import json
import requests




# ---------- Utility Functions ----------

async def get_sessions(user_login_id: str):
    """
    Get all session IDs for a given user (based on key prefix).
    """
    redis = await aioredis.from_url(Redis_url)
    pattern = f"{user_login_id}:*"
    keys = await redis.keys(pattern)
    sessions = [key.decode().replace(f"{user_login_id}:", "") for key in keys]
    await redis.close()
    return sessions


async def get_session_history(user_login_id: str, session_id: str):
    """
    Retrieve chat history for a given user's session.
    """
    try:
        session = RedisSession.from_url(
            session_id,
            url=Redis_url,
            key_prefix=f"{user_login_id}:",
        )
        if not await session.ping():
            raise Exception("Redis connection failed")

        items = await session.get_items()
        history = [
            {"role": msg.get("role", "unknown"), "content": msg.get("content", "")}
            for msg in items
        ]
        await session.close()
        return history

    except Exception as e:
        return {"error": str(e)}


async def delete_session(user_login_id: str, session_id: str):
    """
    Delete a specific session for a given user.
    """
    try:
        session = RedisSession.from_url(
            session_id,
            url=Redis_url,
            key_prefix=f"{user_login_id}:",
        )
        if not await session.ping():
            raise Exception("Redis connection failed")

        await session.clear_session()
        await session.close()
        return {"status": "success", "message": f"Session {session_id} deleted"}

    except Exception as e:
        return {"status": "error", "message": str(e)}


# ---------- Example Usage ----------

async def main_demo():
    user_id = "vatsav_user2"
    session_id = ":uuid_12345"

    print("Creating session...")
    session = RedisSession.from_url(
        session_id,
        url=Redis_url,
        key_prefix=f"{user_id}:",
    )

    agent = Agent(name="Assistant", instructions="Be concise.")
    await Runner.run(agent, "Hello!", session=session)
    await Runner.run(agent, "How are you?", session=session)
    await session.close()

    print("\n--- All Sessions ---")
    print(await get_sessions(user_id))
    print("lenth of the sessions: ", len(await get_sessions(user_id)) or 0)

    print("\n--- Session History ---")
    
    history = await get_session_history(user_id, session_id)
    print("lenght of the history: ", len(history) or 0)
    print(history)
    print("\nHistoryends=======================:")
    for msg in history:
        print(f"{msg['role']}: {msg['content']}")
       


    

    print("\n--- Delete Session ---")
    print(await delete_session(user_id, session_id))


if __name__ == "__main__":
    asyncio.run(main_demo())