import spaces
from transformers import AutoModelForCausalLM, AutoTokenizer
import torch
import gradio as gr
import os 

torch.backends.cuda.matmul.allow_tf32 = False
torch.backends.cuda.matmul.allow_bf16_reduced_precision_reduction = False
torch.backends.cuda.matmul.allow_fp16_reduced_precision_reduction = False
torch.backends.cudnn.allow_tf32 = False
torch.backends.cudnn.deterministic = False
torch.backends.cudnn.benchmark = False
#torch.backends.cuda.preferred_blas_library="cublas"
# torch.backends.cuda.preferred_linalg_library="cusolver"

torch.set_float32_matmul_precision("highest")
os.putenv("HF_HUB_ENABLE_HF_TRANSFER","1")
os.environ["SAFETENSORS_FAST_GPU"] = "1"

model_name = "Qwen/Qwen2.5-Coder-14B-Instruct"

# Load model and tokenizer (outside the function for efficiency)
model = AutoModelForCausalLM.from_pretrained(
    model_name,
    torch_dtype="auto",
   # device_map="auto",
    trust_remote_code=True # Add this line for Qwen models
).to('cuda',torch.bfloat16)

tokenizer = AutoTokenizer.from_pretrained(model_name, trust_remote_code=True, use_fast=True) # Add this line for Qwen models

@spaces.GPU(required=True)
def generate_code(prompt):
    messages = [
        {"role": "system", "content": "You are Qwen, created by Alibaba Cloud. You are a helpful assistant."},
        {"role": "user", "content": prompt}
    ]
    text = tokenizer.apply_chat_template(
        messages,
        tokenize=False,
        add_generation_prompt=True
    )
    model_inputs = tokenizer([text], return_tensors="pt").to(model.device)
    with torch.no_grad():
        generated_ids = model.generate(
            **model_inputs,
            max_new_tokens = 1024,
            min_new_tokens = 256,
            low_memory = False,
            do_sample = True,
            #guidance_scale = 3.8,
        )
    generated_ids = [output_ids[len(input_ids):] for input_ids, output_ids in zip(model_inputs.input_ids, generated_ids)]
    response = tokenizer.batch_decode(generated_ids, skip_special_tokens=True)[0]
    return response

with gr.Blocks(title="Qwen 14b") as demo:  # Updated title
    with gr.Tab("Code Chat"):
        run_button = gr.Button("Run", scale=0)
        prompt = gr.Text(
            label="Prompt",
            show_label=False,
            max_lines=1,
            placeholder="Enter your prompt",
            container=False,
        )
        result = gr.Text(
            label="Result",
            show_label=False,
            max_lines=100,
            container=False,
        )
        gr.on(
            triggers=[
                run_button.click,
            ],
      #  api_name="generate",  # Add this line
            fn=generate_code,
            inputs=[
                prompt,
            ],
            outputs=[result],
        )

demo.launch(share=False)