import os
import tempfile
import gradio as gr
import numpy as np
from transformers import Qwen2VLForConditionalGeneration, AutoProcessor
from qwen_vl_utils import process_vision_info
import torch
from ast import literal_eval
from PIL import Image
import json

# Load the model on the available device(s)
model = Qwen2VLForConditionalGeneration.from_pretrained(
    "Qwen/Qwen2-VL-7B-Instruct", torch_dtype="auto", device_map="auto"
)

# Load the processor
processor = AutoProcessor.from_pretrained("Qwen/Qwen2-VL-7B-Instruct")

# Define your prompts
other_benifits = '''Extract the following information in the given format:
        {'other_benefits_and_information': {
            '401k eru: {'This Period':'', 'Year-to-Date':''}},
            'quota summary':
                            {
                            'sick:': '',
                            'vacation:': '',
                            }
            'payment method': 'eg. Direct payment',
            'Amount': 'eg. 12.99'
                            }
'''

tax_deductions = '''Extract the following information in the given format:
                {
                'tax_deductions': {
                    'federal:': {
                        'withholding tax:': {'Amount':'', 'Year-To_Date':""},
                        'ee social security tax:': {'Amount':'', 'Year-To_Date':""},
                        'ee medicare tax:': {'Amount':'', 'Year-To_Date':""}},
                    'california:': {
                        'withholding tax:': {'Amount':'', 'Year-To_Date':""},
                        'ee disability tax:': {'Amount':'', 'Year-To-Date':""}}},
                }
'''

intro = '''Extract the following information in the given format:
                {
                'check date': "",
                'name': "",
                'address': ""
                }
'''

def format_nested_dict(data, indent=0):
    formatted_str = ""
    indent_str = "        " * indent  # Indentation for the current level
    
    for key, value in data.items():
        # If value is a dictionary, recurse deeper
        if isinstance(value, dict):
            formatted_str += f"{indent_str}{key}:\n"
            formatted_str += format_nested_dict(value, indent + 1)
        else:
            formatted_str += f"{indent_str}{key}: {value}\n"
    
    return formatted_str

def process_function(image_path, prompt):
    messages = [
        {
            "role": "user",
            "content": [
                {
                    "type": "image",
                    "image": image_path,  # Use the file path here
                },
                {"type": "text", "text":  prompt},
            ],
        }
    ]
    # Preparation for inference
    text = processor.apply_chat_template(
        messages, tokenize=False, add_generation_prompt=True
    )
    image_inputs, video_inputs = process_vision_info(messages)
    inputs = processor(
        text=[text],
        images=image_inputs,
        videos=video_inputs,
        padding=True,
        return_tensors="pt",
    )
    inputs = inputs.to("cuda")
    # Inference: Generation of the output
    generated_ids = model.generate(**inputs, max_new_tokens=1500)
    generated_ids_trimmed = [
        out_ids[len(in_ids) :] for in_ids, out_ids in zip(inputs.input_ids, generated_ids)
    ]
    output_text = processor.batch_decode(
        generated_ids_trimmed, skip_special_tokens=True, clean_up_tokenization_spaces=False
    )

    # Handle output text to convert it into JSON
    try:
        almost_json = output_text[0].split('```\n')[-1].split('\n```')[0]

        json = literal_eval(almost_json)
    except:
        try:
            almost_json = output_text[0].split('```json\n')[-1].split('\n```')[0]
            json = literal_eval(almost_json)
        except:
            json = output_text[0]

    return json

def process_document(image):
    # Save the uploaded image to a temporary file
    with tempfile.NamedTemporaryFile(delete=False, suffix=".jpg") as tmp_file:
        image = Image.fromarray(image)  # Convert NumPy array to PIL Image
        image.save(tmp_file.name)  # Save the image to the temporary file
        image_path = tmp_file.name  # Get the path of the saved file

    # Process the image with your model
    one = process_function(image_path, other_benifits)
    two = process_function(image_path, tax_deductions)
    three = process_function(image_path, intro)

    text_one = format_nested_dict(one)
    text_two = format_nested_dict(two)
    text_three = format_nested_dict(three)

    # Optionally, you can delete the temporary file after use
    os.remove(image_path)

    return text_one, text_two, text_three, one, two, three





# Create Gradio interface
demo = gr.Interface(
    fn=process_document,
    inputs="image",  # Gradio will handle the image input
    outputs=[
        gr.Textbox(label="Other Benefits and Information"),  # Second output box with heading
        gr.Textbox(label="Tax Deductions Information"),  # Second output box with heading
        gr.Textbox(label="Introduction"),  # Second output box with heading
        
        gr.JSON(label="Other Benefits and Information"),  # First output box with heading
        gr.JSON(label="Tax Deductions Information"),  # First output box with heading
        gr.JSON(label="Introduction"),
    ],
    title="<div style='text-align: center;'>Information Extraction From PaySlip</div>",
    examples=[["Slip_1.jpg"], ["Slip_2.jpg"]],
    cache_examples=False
)

demo.launch()