from typing import Optional

import gradio as gr
import numpy as np
import torch
from PIL import Image
import io
import base64, os
from util.utils import check_ocr_box, get_yolo_model, get_caption_model_processor, get_som_labeled_img
import torch
from PIL import Image
import ast

# 定义模型路径，使用相对路径，并使用 os.path.join 确保跨平台兼容性
MODEL_DIR = 'weights'
YOLO_MODEL_PATH = os.path.join(MODEL_DIR, 'icon_detect', 'model.pt')
CAPTION_MODEL_PATH = os.path.join(MODEL_DIR, 'icon_caption')
# BLIP2_CAPTION_MODEL_PATH = os.path.join(MODEL_DIR, 'icon_caption_blip2') # 如果使用 BLIP2 模型

yolo_model = get_yolo_model(model_path='weights/icon_detect/model.pt')
caption_model_processor = get_caption_model_processor(model_name="ollama", model_name_or_path=CAPTION_MODEL_PATH)
# caption_model_processor = get_caption_model_processor(model_name="blip2", model_name_or_path="weights/icon_caption_blip2")

MARKDOWN = """
# OmniParser for Pure Vision Based General GUI Agent嘻嘻 🔥
<div>
    <a href="https://arxiv.org/pdf/2408.00203">
        <img src="https://img.shields.io/badge/arXiv-2408.00203-b31b1b.svg" alt="Arxiv" style="display:inline-block;">
    </a>
</div>

OmniParser is a screen parsing tool to convert general GUI screen to structured elements. 
"""

DEVICE = torch.device('cuda')

def process(
    image_input,
    box_threshold,
    iou_threshold,
    use_paddleocr,
    imgsz
) -> Optional[Image.Image]:

    image_save_path = 'imgs/saved_image_demo.png'
    image_input.save(image_save_path)
    image = Image.open(image_save_path)
    box_overlay_ratio = image.size[0] / 3200
    draw_bbox_config = {
        'text_scale': 0.8 * box_overlay_ratio,
        'text_thickness': max(int(2 * box_overlay_ratio), 1),
        'text_padding': max(int(3 * box_overlay_ratio), 1),
        'thickness': max(int(3 * box_overlay_ratio), 1),
    }

    ocr_bbox_rslt, is_goal_filtered = check_ocr_box(image_save_path, display_img = False, output_bb_format='xyxy', goal_filtering=None, easyocr_args={'paragraph': False, 'text_threshold':0.9}, use_paddleocr=use_paddleocr)
    text, ocr_bbox_input = ocr_bbox_rslt

    # Correctly handle ocr_bbox and ocr_text
    if ocr_bbox_input is None or not ocr_bbox_input:
        ocr_bbox = []
        ocr_text = []
    else:
        ocr_bbox = []
        for box_str in ocr_bbox_input:
            try:
                # 使用 eval()，但要非常小心！
                box = eval(box_str)  # 转换为元组
                ocr_bbox.append(box)
            except (SyntaxError, NameError, TypeError, ValueError):
                print(f"警告：无法解析边界框字符串：{box_str}")  # 打印警告信息，但继续处理其他框
                continue # 跳过错误的框
        ocr_text = text  # 使用 check_ocr_box 返回的 text
            
    dino_labled_img, label_coordinates, parsed_content_list = get_som_labeled_img(image_save_path, yolo_model, BOX_TRESHOLD=box_threshold, output_coord_in_ratio=True, ocr_bbox=ocr_bbox, draw_bbox_config=draw_bbox_config, caption_model_processor=caption_model_processor, ocr_text=ocr_text, iou_threshold=iou_threshold, imgsz=imgsz) 
    image = Image.open(io.BytesIO(base64.b64decode(dino_labled_img)))
    print('finish processing')
    parsed_content_list = '\n'.join([f'icon {i}: ' + str(v) for i,v in enumerate(parsed_content_list)])
    return image, str(parsed_content_list)

with gr.Blocks() as demo:
    gr.Markdown(MARKDOWN)
    with gr.Row():
        with gr.Column():
            image_input_component = gr.Image(type='pil', label='Upload image')
            box_threshold_component = gr.Slider(label='Box Threshold', minimum=0.01, maximum=1.0, step=0.01, value=0.05)
            iou_threshold_component = gr.Slider(label='IOU Threshold', minimum=0.01, maximum=1.0, step=0.01, value=0.1)
            use_paddleocr_component = gr.Checkbox(label='Use PaddleOCR', value=True)
            imgsz_component = gr.Slider(label='Icon Detect Image Size', minimum=640, maximum=1920, step=32, value=640)
            submit_button_component = gr.Button(value='Submit', variant='primary')
        with gr.Column():
            image_output_component = gr.Image(type='pil', label='Image Output')
            text_output_component = gr.Textbox(label='Parsed screen elements', placeholder='Text Output')

    submit_button_component.click(
        fn=process,
        inputs=[
            image_input_component,
            box_threshold_component,
            iou_threshold_component,
            use_paddleocr_component,
            imgsz_component
        ],
        outputs=[image_output_component, text_output_component]
    )

demo.launch(share=True, server_port=7861, server_name='0.0.0.0')