import asyncio
import json
import logging
import os
import time
import traceback
from datetime import datetime
from typing import AsyncContextManager

import valkey
from dotenv import load_dotenv
from sqlalchemy import text
from sqlalchemy.ext.asyncio import create_async_engine


### Database ###
EXTEND_CLIENT = None
CON: AsyncContextManager | None = None
VAL_KEY = None
VK_IN = 'fr_orchestrator_input'
VK_OUT = 'fr_orchestrator_output'

### Logging ###
load_dotenv()
LOG_FILEPATH: str = os.getenv("LOGS_PATH") + '/Fund_Rate_Algo_Orchestrator.log'

### ALGO GLOBALS ###
ASTER_ALLOW_ORDERING: bool = True
EXTEND_ALLOW_ORDERING: bool = True
LOOP_SLEEP_SEC = 1

async def orchestrator() -> None:
    try:
        VK_PUBSUB = VAL_KEY.pubsub()
        VK_PUBSUB.subscribe(VK_IN)
        
        print(f"Subscribed to '{VK_IN}'. Waiting for messages...")

        for message in VK_PUBSUB.listen():
            # Valkey sends a 'subscribe' message first; we usually want to skip it
            if message['type'] == 'message':
                data = message['data']
                channel = message['channel']
                print(f"[{channel}] Received: {data}")

    except valkey.exceptions.ConnectionError as e:
        print(f"Could not connect to Valkey. Please check the publish server is up; {e}")
    except KeyboardInterrupt:
        logging.info('ORCHESTRATOR SHUTTING DOWN...')
    except Exception as e:
        logging.error(traceback.format_exc())
        logging.critical(f'*** ORCHESTRATOR CRASHED: {e}')

### MAIN STARTUP ###
async def main() -> None:
    global EXTEND_CLIENT
    global VAL_KEY
    global CON

    VAL_KEY = valkey.Valkey(host='localhost', port=6379, db=0, decode_responses=True)
    engine = create_async_engine('mysql+asyncmy://root:pwd@localhost/fund_rate')

    async with engine.connect() as CON:
        await orchestrator()

if __name__ == '__main__':
    START_TIME = round(datetime.now().timestamp()*1000)

    logging.info(f'Log FilePath: {LOG_FILEPATH}')

    logging.basicConfig(
        force=True,
        filename=LOG_FILEPATH,
        level=logging.INFO,
        format='%(asctime)s - %(levelname)s - %(message)s',
        filemode='w'
    )
    logging.info(f"STARTED: {START_TIME}")

    asyncio.run(main())