from fastapi import FastAPI, HTTPException, Depends
from pydantic import BaseModel
from web3 import Web3
import os

# Pydantic model for input validation
class TransferRequest(BaseModel):
    recipient_address: str
    execute_transfer: bool = False  # Default to False

class Validation(BaseModel):
    prompt: str

# FastAPI app
app = FastAPI()
# Global counter
counter = 0

# Modified increment function
def increment_and_print(value: int):
    global counter
    counter += value
    print(f"Counter: {counter}")
    return counter

# Web3 setup
BASE_RPC_URL = "https://mainnet.base.org"  # Replace with testnet URL if needed
w3 = Web3(Web3.HTTPProvider(BASE_RPC_URL))

# Function to get the private key from Hugging Face Secrets
def get_private_key():
    private_key = os.environ.get("LumKey")
    if not private_key:
        raise HTTPException(status_code=500, detail="Private key not found in secrets.")
    return private_key

# Function to perform the ETH transfer
def transfer_eth(recipient_address: str, private_key: str):
    try:
        account = w3.eth.account.from_key(private_key)
        sender_address = account.address

        nonce = w3.eth.get_transaction_count(sender_address)

        tx = {
            'nonce': nonce,
            'to': w3.to_checksum_address(recipient_address),
            'value': w3.to_wei(0.001, 'ether'),  # Changed to 0.001 ETH
            'gas': 21000,  # Standard ETH transfer gas
            'gasPrice': w3.eth.gas_price,
            'chainId': 8453, #Base mainnet chainID
        }

        signed_tx = account.sign_transaction(tx)
        tx_hash = w3.eth.send_raw_transaction(signed_tx.rawTransaction)

        return w3.to_hex(tx_hash)

    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Transaction failed: {str(e)}")



# Zephyr completion (existing endpoint - unchanged)
@app.post("/llm_on_cpu")
async def stream(item: Validation):
    system_prompt = 'Below is an instruction that describes a task. Write a response that appropriately completes the request.'
    E_INST = "</s>"
    user, assistant = "<|user|>", "<|assistant|>"
    prompt = f"{system_prompt}{E_INST}\n{user}\n{item.prompt.strip()}{E_INST}\n{assistant}\n"
    return llm(prompt)


# New endpoint for incrementing with prompt value
@app.post("/increment_from_prompt")
async def increment_from_prompt(item: Validation):
    match = re.search(r'\d+', item.prompt)
    if match:
        increment_value = int(match.group())
        result = increment_and_print(increment_value)
    else:
        result = increment_and_print(0)
    return {"counter": result}

# New endpoint for simple increment
@app.post("/increment_counter")
async def increment():
    result = increment_and_print(1)
    return {"counter": result}



# API endpoint for ETH transfer (renamed to /reward)
# @app.post("/reward")
# async def reward_endpoint(request: TransferRequest, private_key: str = Depends(get_private_key)):
#    if request.execute_transfer:
#        try:
#            tx_hash = transfer_eth(request.recipient_address, private_key)
#            return {"transaction_hash": tx_hash}
#        except HTTPException as e:
#            raise e
#        except Exception as e:
#            raise HTTPException(status_code=500, detail=str(e))
#    else:
#        return {"message": "Transaction blocked by execute_transfer flag."}