import redis.asyncio as redis
import json

class History():
    r: redis.Redis()

    def __init__(self, redis_host, redis_port):
        self.r = redis.Redis(host=redis_host, port=redis_port, db=0)

    def createCacheKey(self, id):
        return f"gpt-history-user-{id}"

    async def reset(self, userData):
        key = self.createCacheKey(userData["sender"])
        await self.r.mset(key, null)

    async def get(self, userData):
        key = self.createCacheKey(userData["sender"])
        history = await self.r.get(key)

        if history is not None:
            history = json.loads(history)
            return history
        else:
            return []


    async def add(self, userData, userMessage, assistantMessage):
        history = await self.get(userData)
        history.append({ "role": "user", "content": userMessage })
        history.append({ "role": "assistant", "content": assistantMessage })

        key = self.createCacheKey(userData["sender"])
        history = json.dumps(history)
        await self.r.psetex(key, 300_000, history) # 5 mins

    async def dump(self, userData):
        history = await self.get(userData)
        if (len(history) == 0):
            return "You have no ChatGPT history at the moment."
        # Going to add this at a later point via haste.snrd.eu