import os
import torch

import gradio as gr
import numpy as np
import supervision as sv

from typing import List
from segment_anything import sam_model_registry, SamAutomaticMaskGenerator


HOME = os.getenv("HOME")
DEVICE = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')

SAM_CHECKPOINT = os.path.join(HOME, "weights/sam_vit_h_4b8939.pth")
SAM_MODEL_TYPE = "vit_h"

MARKDOWN = """
<h1 style='text-align: center'>
    <img 
        src='https://som-gpt4v.github.io/website/img/som_logo.png' 
        style='height:50px; display:inline-block'
    />  
    Set-of-Mark (SoM) Prompting Unleashes Extraordinary Visual Grounding in GPT-4V
</h1>
"""

sam = sam_model_registry[SAM_MODEL_TYPE](checkpoint=SAM_CHECKPOINT).to(device=DEVICE)
mask_generator = SamAutomaticMaskGenerator(sam)


def inference(image: np.ndarray, annotation_mode: List[str]) -> np.ndarray:
    return image


image_input = gr.Image(
    label="Input",
    type="numpy")
checkbox_annotation_mode = gr.CheckboxGroup(
    choices=["Mark", "Mask", "Box"],
    value=['Mark'],
    label="Annotation Mode")
image_output = gr.Image(
    label="SoM Visual Prompt",
    type="numpy",
    height=512)
run_button = gr.Button("Run")

with gr.Blocks() as demo:
    gr.Markdown(MARKDOWN)
    with gr.Row():
        with gr.Column():
            image_input.render()
            with gr.Accordion(label="Detailed prompt settings (e.g., mark type)", open=False):
                checkbox_annotation_mode.render()
        with gr.Column():
            image_output.render()
            run_button.render()

    run_button.click(
        fn=inference,
        inputs=[image_input, checkbox_annotation_mode],
        outputs=image_output)

demo.queue().launch(debug=False, show_error=True)