from gradio import inputs, outputs, Interface
from huggingface_hub import InferenceClient

client = InferenceClient("mistralai/Mistral-7B-Instruct-v0.1")


def format_prompt(message, history):
    prompt = "<s>"
    for user_prompt, bot_response in history:
        prompt += f"[INST] {user_prompt} [/INST]"
        prompt += f" {bot_response}</s> "
    prompt += f"[INST] {message} [/INST]"
    return prompt


def generate(
    prompt,
    history,
    temperature=0.9,
    max_new_tokens=256,
    top_p=0.95,
    repetition_penalty=1.0,
):
    temperature = float(temperature)
    if temperature < 1e-2:
        temperature = 1e-2
    top_p = float(top_p)

    generate_kwargs = dict(
        temperature=temperature,
        max_new_tokens=max_new_tokens,
        top_p=top_p,
        repetition_penalty=repetition_penalty,
        do_sample=True,
        seed=42,
    )

    formatted_prompt = format_prompt(prompt, history)

    stream = client.text_generation(
        formatted_prompt,
        **generate_kwargs,
        stream=True,
        details=True,
        return_full_text=False,
    )
    output = ""

    for response in stream:
        output += response.token.text
        yield output
    return output


additional_inputs = [
    inputs.Slider(
        label="Temperature",
        default=0.9,
        min=0.0,
        max=1.0,
        step=0.05,
        description="Higher values produce more diverse outputs",
    ),
    inputs.Slider(
        label="Max new tokens",
        default=256,
        min=0,
        max=1048,
        step=64,
        description="The maximum numbers of new tokens",
    ),
    inputs.Slider(
        label="Top-p (nucleus sampling)",
        default=0.90,
        min=0.0,
        max=1,
        step=0.05,
        description="Higher values sample more low-probability tokens",
    ),
    inputs.Slider(
        label="Repetition penalty",
        default=1.2,
        min=1.0,
        max=2.0,
        step=0.05,
        description="Penalize repeated tokens",
    ),
]


interface = Interface(
    fn=generate,
    inputs=[
        inputs.Textbox(
            label="User Prompt",
            lines=2,
            placeholder="Type your message here...",
        ),
        inputs.Textbox(
            label="Bot Response",
            lines=2,
            placeholder="Bot's response will appear here...",
        ),
        *additional_inputs,
    ],
    outputs=outputs.Textbox(label="Conversation", lines=10),
    title="Mistral 7B",
    layout="vertical",
    theme="compact",
)

interface.launch(share=False)