# libraries
import os
from huggingface_hub import InferenceClient
from dotenv import load_dotenv
import json
import re
#import easyocr
from PIL import Image, ImageEnhance, ImageDraw
import cv2
import numpy as np
from paddleocr import PaddleOCR
import logging

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    handlers=[
        logging.StreamHandler()  # Remove FileHandler and log only to the console
    ]
)

# Set the PaddleOCR home directory to a writable location

os.environ['PADDLEOCR_HOME'] = '/tmp/.paddleocr' 

RESULT_FOLDER = 'static/results/'
if not os.path.exists('/tmp/.paddleocr'):
    os.makedirs(RESULT_FOLDER, exist_ok=True)

# Check if PaddleOCR home directory is writable
if not os.path.exists('/tmp/.paddleocr'):
    os.makedirs('/tmp/.paddleocr', exist_ok=True)
    logging.info("Created PaddleOCR home directory.")
else:
    logging.info("PaddleOCR home directory exists.")

# Load environment variables from .env file
load_dotenv()

# Authenticate with Hugging Face
HFT = os.getenv('HF_TOKEN')

# Initialize the InferenceClient
client = InferenceClient(model="mistralai/Mistral-7B-Instruct-v0.3", token=HFT)

# Specify a custom model storage directory (ensure this path is writable)
#model_storage_directory = '/app/models'

# Create the reader object and set the model storage directory
#reader = easyocr.Reader(['en'], model_storage_directory=model_storage_directory)

def draw_boxes(image, bounds, color='red', width=2):
    draw = ImageDraw.Draw(image)
    for bound in bounds:
        p0, p1, p2, p3 = bound[0]
        draw.line([*p0, *p1, *p2, *p3, *p0], fill=color, width=width)
    return image

# Load image using OpenCV
def load_image(image_path):
    image = cv2.imread(image_path)
    if image is None:
        raise ValueError(f"Could not load image from {image_path}. It may be corrupted or the path is incorrect.")
    return image

# Function for upscaling image using OpenCV's INTER_CUBIC
def upscale_image(image, scale=2):
    height, width = image.shape[:2]
    upscaled_image = cv2.resize(image, (width * scale, height * scale), interpolation=cv2.INTER_CUBIC)
    return upscaled_image

# Function to denoise the image (reduce noise)
def reduce_noise(image):
    return cv2.fastNlMeansDenoisingColored(image, None, 10, 10, 7, 21)

# Function to sharpen the image
def sharpen_image(image):
    kernel = np.array([[0, -1, 0],
                       [-1, 5, -1],
                       [0, -1, 0]])
    sharpened_image = cv2.filter2D(image, -1, kernel)
    return sharpened_image

# Function to increase contrast and enhance details without changing color
def enhance_image(image):
    pil_img = Image.fromarray(cv2.cvtColor(image, cv2.COLOR_BGR2RGB))
    enhancer = ImageEnhance.Contrast(pil_img)
    enhanced_image = enhancer.enhance(1.5)
    enhanced_image_bgr = cv2.cvtColor(np.array(enhanced_image), cv2.COLOR_RGB2BGR)
    return enhanced_image_bgr

# Complete function to process image
def process_image(image_path, scale=2):
    # Load the image
    image = load_image(image_path)

    # Upscale the image
    upscaled_image = upscale_image(image, scale)

    # Reduce noise
    denoised_image = reduce_noise(upscaled_image)

    # Sharpen the image
    sharpened_image = sharpen_image(denoised_image)

    # Enhance the image contrast and details without changing color
    final_image = enhance_image(sharpened_image)

    return final_image

def ocr_with_paddle(img):
    finaltext = ''
    #model_dir = os.getenv('PADDLEOCR_MODEL_DIR', '/tmp/.paddleocr')
    #ocr = PaddleOCR(lang='en', use_angle_cls=True, det_model_dir=model_dir)
    #ocr = PaddleOCR(lang='en', use_angle_cls=True, det_model_dir=os.environ['PADDLEOCR_HOME'])
    logging.info(f"PADDLEOCR_HOME: {os.environ['PADDLEOCR_HOME']}")
    ocr = PaddleOCR(
        lang='en', 
        use_angle_cls=True,
        det_model_dir=os.path.join(os.environ['PADDLEOCR_HOME'], 'whl/det'),
        rec_model_dir=os.path.join(os.environ['PADDLEOCR_HOME'], 'whl/rec/en/en_PP-OCRv4_rec_infer'),
        cls_model_dir=os.path.join(os.environ['PADDLEOCR_HOME'], 'whl/cls/ch_ppocr_mobile_v2.0_cls_infer')
    )

    result = ocr.ocr(img)

    for i in range(len(result[0])):
        text = result[0][i][1][0]
        finaltext += ' ' + text
    return finaltext

def extract_text_from_images(image_paths):
    all_extracted_texts = {}
    all_extracted_imgs = {}
    for image_path in image_paths:
        try:
            # Enhance the image before OCR        
            enhanced_image = process_image(image_path, scale=2)

            # Draw boxes on the processed image (optional, requires bounds)
            img_result = Image.fromarray(enhanced_image)

            result_image_path = os.path.join(RESULT_FOLDER, f'result_{os.path.basename(image_path)}')
            img_result.save(result_image_path)  # Save the processed image

            # Perform OCR on the enhanced image
            result = ocr_with_paddle(enhanced_image)

            all_extracted_texts[image_path] = result
            all_extracted_imgs[image_path] = result_image_path
        except ValueError as ve:
            print(f"Error processing image {image_path}: {ve}")
            continue  # Continue to the next image if there's an error

    # Convert to JSON-compatible structure
    all_extracted_imgs_json = {str(k): str(v) for k, v in all_extracted_imgs.items()}
    return all_extracted_texts, all_extracted_imgs_json

# Function to call the Gemma model and process the output as Json 
def Data_Extractor(data, client=client):
    text = f'''Act as a  Text extractor for the following text given in text: {data} 
    extract text in the following output JSON string:
    {{
    "Name": ["Identify and Extract All the person's name from the text."],
    "Designation": ["Extract All the designation or job title mentioned in the text."],
    "Company": ["Extract All the company or organization name if mentioned."],
    "Contact": ["Extract All phone number, including country codes if present."],
    "Address": ["Extract All the full postal address or location mentioned in the text."],
    "Email": ["Identify and Extract All valid email addresses mentioned in the text else 'Not found'."],
    "Link": ["Identify and Extract any website URLs or social media links present in the text."]
    }}    
    Output:
    '''
    # Call the API for inference
    response = client.text_generation(text, max_new_tokens=600)#, temperature=0.4, top_k=50, top_p=0.9, repetition_penalty=1.2)
    
    print("parse in text ---:",response)

    # Convert the response text to JSON
    try:
        json_data = json.loads(response)
        return json_data
    except json.JSONDecodeError as e:
        return {"error": f"Error decoding JSON: {e}"}   

# For have text compatible to the llm
def json_to_llm_str(textJson):
    str=''
    for file,item in textJson.items():
      str+=item + ' '
    return str

# Define the RE for extracting the contact details like number, mail , portfolio, website etc 
def extract_contact_details(text):
    # Regex patterns
    # Phone numbers with at least 5 digits in any segment 
    combined_phone_regex = re.compile(r'''
    (?: 
        #(?:(?:\+91[-.\s]?)?\d{5}[-.\s]?\d{5})|(?:\+?\d{1,3})?[-.\s()]?\d{5,}[-.\s()]?\d{5,}[-.\s()]?\d{1,9} | /^[\.-)( ]*([0-9]{3})[\.-)( ]*([0-9]{3})[\.-)( ]*([0-9]{4})$/ |
        \+1\s\(\d{3}\)\s\d{3}-\d{4} |               # USA/Canada Intl +1 (XXX) XXX-XXXX
        \(\d{3}\)\s\d{3}-\d{4} |                    # USA/Canada STD (XXX) XXX-XXXX
        \(\d{3}\)\s\d{3}\s\d{4} |                   # USA/Canada (XXX) XXX XXXX
        \(\d{3}\)\s\d{3}\s\d{3} |                   # USA/Canada (XXX) XXX XXX
        \+1\d{10} |                                 # +1 XXXXXXXXXX
        \d{10} |                                    # XXXXXXXXXX
        \+44\s\d{4}\s\d{6} |                        # UK Intl +44 XXXX XXXXXX
        \+44\s\d{3}\s\d{3}\s\d{4} |                 # UK Intl +44 XXX XXX XXXX
        0\d{4}\s\d{6} |                             # UK STD 0XXXX XXXXXX
        0\d{3}\s\d{3}\s\d{4} |                      # UK STD 0XXX XXX XXXX
        \+44\d{10} |                                # +44 XXXXXXXXXX
        0\d{10} |                                   # 0XXXXXXXXXX
        \+61\s\d\s\d{4}\s\d{4} |                    # Australia Intl +61 X XXXX XXXX
        0\d\s\d{4}\s\d{4} |                         # Australia STD 0X XXXX XXXX
        \+61\d{9} |                                 # +61 XXXXXXXXX
        0\d{9} |                                    # 0XXXXXXXXX
        \+91\s\d{5}-\d{5} |                         # India Intl +91 XXXXX-XXXXX
        \+91\s\d{4}-\d{6} |                         # India Intl +91 XXXX-XXXXXX
        \+91\s\d{10} |                              # India Intl +91 XXXXXXXXXX
        0\d{2}-\d{7} |                              # India STD 0XX-XXXXXXX
        \+91\d{10} |                                # +91 XXXXXXXXXX
        \+49\s\d{4}\s\d{8} |                        # Germany Intl +49 XXXX XXXXXXXX
        \+49\s\d{3}\s\d{7} |                        # Germany Intl +49 XXX XXXXXXX
        0\d{3}\s\d{8} |                             # Germany STD 0XXX XXXXXXXX
        \+49\d{12} |                                # +49 XXXXXXXXXXXX
        \+49\d{10} |                                # +49 XXXXXXXXXX
        0\d{11} |                                   # 0XXXXXXXXXXX
        \+86\s\d{3}\s\d{4}\s\d{4} |                 # China Intl +86 XXX XXXX XXXX
        0\d{3}\s\d{4}\s\d{4} |                      # China STD 0XXX XXXX XXXX
        \+86\d{11} |                                # +86 XXXXXXXXXXX
        \+81\s\d\s\d{4}\s\d{4} |                    # Japan Intl +81 X XXXX XXXX
        \+81\s\d{2}\s\d{4}\s\d{4} |                 # Japan Intl +81 XX XXXX XXXX
        0\d\s\d{4}\s\d{4} |                         # Japan STD 0X XXXX XXXX
        \+81\d{10} |                                # +81 XXXXXXXXXX
        \+81\d{9} |                                 # +81 XXXXXXXXX
        0\d{9} |                                    # 0XXXXXXXXX
        \+55\s\d{2}\s\d{5}-\d{4} |                  # Brazil Intl +55 XX XXXXX-XXXX
        \+55\s\d{2}\s\d{4}-\d{4} |                  # Brazil Intl +55 XX XXXX-XXXX
        0\d{2}\s\d{4}\s\d{4} |                      # Brazil STD 0XX XXXX XXXX
        \+55\d{11} |                                # +55 XXXXXXXXXXX
        \+55\d{10} |                                # +55 XXXXXXXXXX
        0\d{10} |                                   # 0XXXXXXXXXX
        \+33\s\d\s\d{2}\s\d{2}\s\d{2}\s\d{2} |      # France Intl +33 X XX XX XX XX
        0\d\s\d{2}\s\d{2}\s\d{2}\s\d{2} |           # France STD 0X XX XX XX XX
        \+33\d{9} |                                 # +33 XXXXXXXXX
        0\d{9} |                                    # 0XXXXXXXXX
        \+7\s\d{3}\s\d{3}-\d{2}-\d{2} |             # Russia Intl +7 XXX XXX-XX-XX
        8\s\d{3}\s\d{3}-\d{2}-\d{2} |               # Russia STD 8 XXX XXX-XX-XX
        \+7\d{10} |                                 # +7 XXXXXXXXXX
        8\d{10} |                                   # 8 XXXXXXXXXX
        \+27\s\d{2}\s\d{3}\s\d{4} |                 # South Africa Intl +27 XX XXX XXXX
        0\d{2}\s\d{3}\s\d{4} |                      # South Africa STD 0XX XXX XXXX
        \+27\d{9} |                                 # +27 XXXXXXXXX
        0\d{9} |                                    # 0XXXXXXXXX
        \+52\s\d{3}\s\d{3}\s\d{4} |                 # Mexico Intl +52 XXX XXX XXXX
        \+52\s\d{2}\s\d{4}\s\d{4} |                 # Mexico Intl +52 XX XXXX XXXX
        01\s\d{3}\s\d{4} |                          # Mexico STD 01 XXX XXXX
        \+52\d{10} |                                # +52 XXXXXXXXXX
        01\d{7} |                                   # 01 XXXXXXX
        \+234\s\d{3}\s\d{3}\s\d{4} |                # Nigeria Intl +234 XXX XXX XXXX
        0\d{3}\s\d{3}\s\d{4} |                      # Nigeria STD 0XXX XXX XXXX
        \+234\d{10} |                               # +234 XXXXXXXXXX
        0\d{10} |                                   # 0XXXXXXXXXX
        \+971\s\d\s\d{3}\s\d{4} |                   # UAE Intl +971 X XXX XXXX
        0\d\s\d{3}\s\d{4} |                         # UAE STD 0X XXX XXXX
        \+971\d{8} |                                # +971 XXXXXXXX
        0\d{8} |                                    # 0XXXXXXXX
        \+54\s9\s\d{3}\s\d{3}\s\d{4} |              # Argentina Intl +54 9 XXX XXX XXXX
        \+54\s\d{1}\s\d{4}\s\d{4} |                 # Argentina Intl +54 X XXXX XXXX
        0\d{3}\s\d{4} |                             # Argentina STD 0XXX XXXX
        \+54\d{10} |                                # +54 9 XXXXXXXXXX
        \+54\d{9} |                                 # +54 XXXXXXXXX
        0\d{7} |                                    # 0XXXXXXX
        \+966\s\d\s\d{3}\s\d{4} |                   # Saudi Intl +966 X XXX XXXX
        0\d\s\d{3}\s\d{4} |                         # Saudi STD 0X XXX XXXX
        \+966\d{8} |                                # +966 XXXXXXXX
        0\d{8} |                                    # 0XXXXXXXX
        \+1\d{10} |                                 # +1 XXXXXXXXXX
        \+1\s\d{3}\s\d{3}\s\d{4} |                  # +1 XXX XXX XXXX
        \d{5}\s\d{5} |                              # XXXXX XXXXX                              
        \d{10} |                                    # XXXXXXXXXX
        \+44\d{10} |                                # +44 XXXXXXXXXX
        0\d{10} |                                   # 0XXXXXXXXXX
        \+61\d{9} |                                 # +61 XXXXXXXXX
        0\d{9} |                                    # 0XXXXXXXXX
        \+91\d{10} |                                # +91 XXXXXXXXXX
        \+49\d{12} |                                # +49 XXXXXXXXXXXX
        \+49\d{10} |                                # +49 XXXXXXXXXX
        0\d{11} |                                   # 0XXXXXXXXXXX
        \+86\d{11} |                                # +86 XXXXXXXXXXX
        \+81\d{10} |                                # +81 XXXXXXXXXX
        \+81\d{9} |                                 # +81 XXXXXXXXX
        0\d{9} |                                    # 0XXXXXXXXX
        \+55\d{11} |                                # +55 XXXXXXXXXXX
        \+55\d{10} |                                # +55 XXXXXXXXXX
        0\d{10} |                                   # 0XXXXXXXXXX
        \+33\d{9} |                                 # +33 XXXXXXXXX
        0\d{9} |                                    # 0XXXXXXXXX
        \+7\d{10} |                                 # +7 XXXXXXXXXX
        8\d{10} |                                   # 8 XXXXXXXXXX
        \+27\d{9} |                                 # +27 XXXXXXXXX
        0\d{9} |                                    # 0XXXXXXXXX (South Africa STD)
        \+52\d{10} |                                # +52 XXXXXXXXXX
        01\d{7} |                                   # 01 XXXXXXX
        \+234\d{10} |                               # +234 XXXXXXXXXX
        0\d{10} |                                   # 0XXXXXXXXXX
        \+971\d{8} |                                # +971 XXXXXXXX
        0\d{8} |                                    # 0XXXXXXXX
        \+54\s9\s\d{10} |                           # +54 9 XXXXXXXXXX
        \+54\d{9} |                                 # +54 XXXXXXXXX
        0\d{7} |                                    # 0XXXXXXX
        \+966\d{8} |                                # +966 XXXXXXXX
        0\d{8}                                      # 0XXXXXXXX
        \+\d{3}-\d{3}-\d{4}
    )  

    ''',re.VERBOSE)
    
    # Email regex
    email_regex = re.compile(r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b')
    
    # Profile links regex, updated to avoid conflicts with email domains
    #link_regex = re.compile(r'\b(?:https?://)?(?:www\.)?(?:linkedin\.com|github\.com|indeed\.com|[A-Za-z0-9-]+\.[A-Za-z]{2,})[\w./?-]*\b')
    #link_regex = re.compile(r'\b(?:https?://)?(?:www\.)?[a-zA-Z0-9-]+\.(?:[a-zA-Z]{2,})(?:\.[a-zA-Z]{2,})?(?:\.[a-zA-Z]{2,})?(?:[/\w.-]*)*[\w/?&=-]*\b')
    link_regex = re.compile(r'\b(?:https?:\/\/)?(?:www\.)[a-zA-Z0-9-]+\.(?:com|co\.in|co|io|org|net|edu|gov|mil|int|uk|us|in|de|au|app|tech|xyz|info|biz|fr|dev)\b')
    # Find all matches in the text
    phone_numbers = [num for num in combined_phone_regex.findall(text) if len(num) >= 5]
    print("phone_numbers--->",phone_numbers)
    emails = email_regex.findall(text)
    links_RE = [link for link in link_regex.findall(text) if len(link)>=11]
    
    # Remove profile links that might conflict with emails
    links_RE = [link for link in links_RE if not any(email in link for email in emails)]
    
    return {
        "phone_numbers": phone_numbers,
        "emails": emails,
        "links_RE": links_RE
    }  

# preprocessing the data 
def process_extracted_text(extracted_text):
    # Load JSON data
    data = json.dumps(extracted_text, indent=4)
    data = json.loads(data)

    # Create a single dictionary to hold combined results
    combined_results = {
        "phone_numbers": [],
        "emails": [],
        "links_RE": []
    }

    # Process each text entry
    for filename, text in data.items():
        contact_details = extract_contact_details(text)
        # Extend combined results with the details from this file
        combined_results["phone_numbers"].extend(contact_details["phone_numbers"])
        combined_results["emails"].extend(contact_details["emails"])
        combined_results["links_RE"].extend(contact_details["links_RE"])

    # Convert the combined results to JSON
    #combined_results_json = json.dumps(combined_results, indent=4)
    combined_results_json = combined_results

    # Print the final JSON results
    print("Combined contact details in JSON format:")
    print(combined_results_json)

    return combined_results_json 

# Process the model output for parsed result
def process_resume_data(LLMdata,cont_data,extracted_text):
    
    # Initialize the processed data dictionary
    processed_data = {            
            "name": [LLMdata.get('Name', 'Not found')],
            "contact_number": [LLMdata.get('Contact', 'Not found')],
            "Designation":[LLMdata.get('Designation', 'Not found')],
            "email": [LLMdata.get("Email", 'Not found')],
            "Location": [LLMdata.get('Address', 'Not found')],
            "Link": [LLMdata.get('Link', 'Not found')],
            "Company":[LLMdata.get('Company', 'Not found')],
            "extracted_text": extracted_text
            }
    processed_data['email'].extend(cont_data.get("emails", [])) 
    processed_data['contact_number'].extend(cont_data.get("phone_numbers", []))
    processed_data['Link'].extend(cont_data.get("links_RE", []))
    return processed_data