import datetime
import re
import sys
from io import StringIO

from openai import InvalidRequestError
from openai.error import RateLimitError, AuthenticationError

from config.config import BUG_FOUND_MSG, AUTHORIZATION_ERROR_MESSAGE


def run_chain(chain, inp, capture_hidden_text):
    output = ""
    hidden_text = None
    if capture_hidden_text:
        error_msg = None
        tmp = sys.stdout
        hidden_text_io = StringIO()
        sys.stdout = hidden_text_io

        try:
            output = chain.run(input=inp)
        except AuthenticationError as ae:
            error_msg = AUTHORIZATION_ERROR_MESSAGE + str(datetime.datetime.now()) + ". " + str(ae)
            print("error_msg", error_msg)
        except RateLimitError as rle:
            error_msg = "\n\nRateLimitError: " + str(rle)
        except ValueError as ve:
            error_msg = "\n\nValueError: " + str(ve)
        except InvalidRequestError as ire:
            error_msg = "\n\nInvalidRequestError: " + str(ire)
        except Exception as e:
            error_msg = "\n\n" + BUG_FOUND_MSG + ":\n\n" + str(e)

        sys.stdout = tmp
        hidden_text = hidden_text_io.getvalue()

        # remove escape characters from hidden_text
        hidden_text = re.sub(r'\x1b[^m]*m', '', hidden_text)

        # remove "Entering new AgentExecutor chain..." from hidden_text
        hidden_text = re.sub(r"Entering new AgentExecutor chain...\n", "", hidden_text)

        # remove "Finished chain." from hidden_text
        hidden_text = re.sub(r"Finished chain.", "", hidden_text)

        # Add newline after "Thought:" "Action:" "Observation:" "Input:" and "AI:"
        hidden_text = re.sub(r"Thought:", "\n\nThought:", hidden_text)
        hidden_text = re.sub(r"Action:", "\n\nAction:", hidden_text)
        hidden_text = re.sub(r"Observation:", "\n\nObservation:", hidden_text)
        hidden_text = re.sub(r"Input:", "\n\nInput:", hidden_text)
        hidden_text = re.sub(r"AI:", "\n\nAI:", hidden_text)

        if error_msg:
            hidden_text += error_msg

        print("hidden_text: ", hidden_text)
    else:
        try:
            output = chain.run(input=inp)
        except AuthenticationError as ae:
            output = AUTHORIZATION_ERROR_MESSAGE + str(datetime.datetime.now()) + ". " + str(ae)
            print("output", output)
        except RateLimitError as rle:
            output = "\n\nRateLimitError: " + str(rle)
        except ValueError as ve:
            output = "\n\nValueError: " + str(ve)
        except InvalidRequestError as ire:
            output = "\n\nInvalidRequestError: " + str(ire)
        except Exception as e:
            output = "\n\n" + BUG_FOUND_MSG + ":\n\n" + str(e)

    return output, hidden_text