import gradio as gr
import spaces
from transformers import AutoModel, AutoTokenizer
from PIL import Image
import numpy as np
import os

tokenizer = AutoTokenizer.from_pretrained('ucaslcl/GOT-OCR2_0', trust_remote_code=True)
model = AutoModel.from_pretrained('ucaslcl/GOT-OCR2_0', trust_remote_code=True, low_cpu_mem_usage=True, device_map='cuda', use_safetensors=True)
model = model.eval().cuda()
html_file = './demo.html'

@spaces.GPU
def run_GOT(image_array, got_mode, fine_grained_mode="", ocr_color="", ocr_box=""):
    image = image_array
    if got_mode == "plain texts OCR":
        res = model.chat(tokenizer, image, ocr_type='ocr')
    elif got_mode == "format texts OCR":
        res = model.chat(tokenizer, image, ocr_type='format', render=True, save_render_file=html_file)
    elif got_mode == "plain multi-crop OCR":
        res = model.chat_crop(tokenizer, image, ocr_type='ocr')
    elif got_mode == "format multi-crop OCR":
        res = model.chat_crop(tokenizer, image, ocr_type='format', render=True, save_render_file=html_file)
    elif got_mode == "plain fine-grained OCR":
        res = model.chat(tokenizer, image, ocr_type='ocr', ocr_box=ocr_box, ocr_color=ocr_color)
    elif got_mode == "format fine-grained OCR":
        res = model.chat(tokenizer, image, ocr_type='format', ocr_box=ocr_box, ocr_color=ocr_color, render=True, save_render_file=html_file)

    # print("res:\n", res)
    if "format" in got_mode:
        with open(html_file, 'r') as f:
            demo_html = f.read()
        # print("demo_html: \n", demo_html)
        print(os.path.abspath(html_file))
        return res, demo_html
    return res, None

def task_update(task):
    if "fine-grained" in task:
        return [
            gr.update(visible=True),
            gr.update(visible=False),
            gr.update(visible=False),
        ]
    else:
        return [
            gr.update(visible=False),
            gr.update(visible=False),
            gr.update(visible=False),
        ]

def fine_grained_update(task):
    if task == "box":
        return [
            gr.update(visible=False, value = ""),
            gr.update(visible=True),
        ]
    elif task == 'color':
        return [
            gr.update(visible=True),
            gr.update(visible=False, value = ""),
        ]


title_html = """
<h2> <span class="gradient-text" id="text">General OCR Theory</span><span class="plain-text">: Towards OCR-2.0 via a Unified End-to-end Model</span></h2>
<a href="https://huggingface.co/ucaslcl/GOT-OCR2_0">[😊 Hugging Face]</a> 
<a href="https://arxiv.org/abs/2409.01704">[📜 Paper]</a> 
<a href="https://github.com/Ucas-HaoranWei/GOT-OCR2.0/">[🌟 GitHub]</a> 
"""

with gr.Blocks() as demo:
    gr.HTML(title_html)
    gr.Markdown("""
    "🔥🔥🔥This is the official online demo of GOT-OCR-2.0 model!!!"
    
    ### Demo Guidelines

    You need to upload your image below and choose one mode of GOT, then click "Submit" to run GOT model. More characters will result in longer wait times.
    - **plain texts OCR & format texts OCR**: The two modes are for the image-level OCR.
    - **plain multi-crop OCR & format multi-crop OCR**: For images with more complex content, you can achieve higher-quality results with these modes.
    - **plain fine-grained OCR & format fine-grained OCR**: In these modes, you can specify fine-grained regions on the input image for more flexible OCR. Fine-grained regions can be coordinates of the box, red color, blue color, or green color.
    """)
    
    with gr.Row():
        with gr.Column():
            image_input = gr.Image(type="filepath", label="upload your image")
            task_dropdown = gr.Dropdown(
                choices=[
                    "plain texts OCR",
                    "format texts OCR",
                    "plain multi-crop OCR",
                    "format multi-crop OCR",
                    "plain fine-grained OCR",
                    "format fine-grained OCR",
                ],
                label="Choose one mode of GOT",
                value="plain texts OCR"
            )
            fine_grained_dropdown = gr.Dropdown(
                choices=["box", "color"],
                label="fine-grained type",
                visible=False
            )
            color_dropdown = gr.Dropdown(
                choices=["red", "green", "blue"],
                label="color list",
                visible=False
            )
            box_input = gr.Textbox(
                label="input box: [x1,y1,x2,y2]",
                placeholder="e.g., [0,0,100,100]",
                visible=False
            )
            submit_button = gr.Button("Submit")
        
        with gr.Column():
            ocr_result = gr.Textbox(label="GOT output")


    with gr.Column():
        html_result = gr.HTML(
                label="rendered html", show_label=True)
    
    gr.Examples(
        examples=[
            ["assets/coco.jpg", "plain texts OCR", "", "", ""],
            ["assets/en_30.png", "plain texts OCR", "", "", ""],
            ["assets/eq.jpg", "format texts OCR", "", "", ""],
            ["assets/table.jpg", "format texts OCR", "", "", ""],
            ["assets/giga.jpg", "format multi-crop OCR", "", "", ""],
            ["assets/aff2.png", "plain fine-grained OCR", "box", "", "[409,763,756,891]"],
            ["assets/color.png", "plain fine-grained OCR", "color", "red", ""],
        ],
        inputs=[image_input, task_dropdown, fine_grained_dropdown, color_dropdown, box_input],
        outputs=[ocr_result, html_result],
        fn = run_GOT,
        label="examples",
    )

    task_dropdown.change(
        task_update,
        inputs=[task_dropdown],
        outputs=[fine_grained_dropdown, color_dropdown, box_input]
    )
    fine_grained_dropdown.change(
        fine_grained_update,
        inputs=[fine_grained_dropdown],
        outputs=[color_dropdown, box_input]
    )
    
    submit_button.click(
        run_GOT,
        inputs=[image_input, task_dropdown, fine_grained_dropdown, color_dropdown, box_input],
        outputs=[ocr_result, html_result]
    )

demo.launch()