import openai
import os
import gradio as gr

openai.api_key = os.environ.get("OPENAI_API_KEY")
# 定义提示词长度不能大于1024
MAX_PROMPT_LENGTH = 1024
# 提示词
prompt = """你是一个AI个人助手。你的回答需要满足以下要求:
1. 你的回答必须是中文
2. 回答限制在1000个字以内"""


# 校验提示词长度
def check_prompt_length(question):
    text_length = len(prompt) + len(question)
    if text_length > MAX_PROMPT_LENGTH:
        return False
    return True


class Conversation:
    def __init__(self, prompt, num_of_round):
        self.prompt = prompt
        self.num_of_round = num_of_round
        self.messages = []
        self.messages.append({"role": "system", "content": self.prompt})

    def ask(self, question):
        if not check_prompt_length(question):
            return "你的输入太长了，请将文本长度限制在900以内，请重新输入"
        try:
            self.messages.append({"role": "user", "content": question})
            response = openai.ChatCompletion.create(
                model="gpt-3.5-turbo",
                messages=self.messages,
                temperature=0.5,
                max_tokens=2048,
                top_p=1,
            )
        except Exception as e:
            print(e)
            return e

        message = response["choices"][0]["message"]["content"]
        self.messages.append({"role": "assistant", "content": message})

        if len(self.messages) > self.num_of_round * 2 + 1:
            del self.messages[1:3]
        return message


conv = Conversation(prompt, 0)


def answer(question, history=[]):
    if question.lower() in ["bye", "goodbye", "exit"]:
        print("Goodbye!")
        exit(0)
    history.append(question)
    response = conv.ask(question)
    history.append(response)
    responses = [(u, b) for u, b in zip(history[::2], history[1::2])]
    return responses, history


with gr.Blocks(css="#chatbot{height:300px} .overflow-y-auto{height:500px}") as demo:
    chatbot = gr.Chatbot(elem_id="chatbot")
    state = gr.State([])

    with gr.Row():
        txt = gr.Textbox(show_label=False, placeholder="Enter text and press enter").style(container=False)

    txt.submit(answer, [txt, state], [chatbot, state])

demo.launch()