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import os
import streamlit as st
from paddleocr import PaddleOCR
from langchain_groq import ChatGroq
from langchain.output_parsers import PydanticOutputParser
from langchain_core.prompts import PromptTemplate
from pydantic import BaseModel, Field
import fitz
import json
from PIL import Image
ocr = PaddleOCR(use_angle_cls=True, lang='es')
st.set_page_config(layout="wide")
class CarInfoEntity(BaseModel):
dealer_name: str = Field(description="Nombre del concesionario o empresa.")
dealer_address: str = Field(description="Direcci贸n f铆sica del concesionario.")
tax_id: str = Field(description="N煤mero de identificaci贸n fiscal del concesionario.")
contact_phone: str = Field(description="N煤mero de tel茅fono principal para contactar con el concesionario.")
contact_fax: str = Field(description="N煤mero de fax del concesionario.")
contact_email: str = Field(description="Direcci贸n de correo electr贸nico para consultas.")
website_url: str = Field(description="Sitio web oficial del concesionario.")
operating_hours: str = Field(description="Horario habitual de atenci贸n del concesionario.")
saturday_hours: str = Field(description="Horario de atenci贸n espec铆fico para los s谩bados.")
order_date: str = Field(description="Fecha en que se realiz贸 el pedido.")
order_number: str = Field(description="Identificador 煤nico del pedido.")
sales_rep: str = Field(description="Nombre del vendedor que maneja la transacci贸n.")
customer_full_name: str = Field(description="Nombre completo del comprador.")
customer_address: str = Field(description="Direcci贸n del comprador.")
customer_city: str = Field(description="Ciudad donde reside el comprador.")
customer_postal_code: str = Field(description="C贸digo postal de la direcci贸n del comprador.")
customer_province: str = Field(description="Provincia donde se encuentra el comprador.")
customer_id: str = Field(description="N煤mero de identificaci贸n del comprador (NIF).")
customer_phone: str = Field(description="N煤mero de tel茅fono del comprador.")
vehicle_description: str = Field(description="Descripci贸n del veh铆culo que se est谩 comprando, incluyendo marca, modelo y a帽o.")
vehicle_color: str = Field(description="Color del veh铆culo.")
vehicle_price: str = Field(description="Precio total del veh铆culo, incluyendo impuestos.")
model = ChatGroq(
model="llama-3.3-70b-versatile",
temperature=0,
max_tokens=None,
timeout=None,
max_retries=2
)
entity = ['dealer_name', 'dealer_address', 'tax_id', 'contact_phone', 'contact_fax', 'contact_email', 'website_url',
'operating_hours', 'saturday_hours', 'order_date', 'order_number', 'sales_rep',
'customer_full_name', 'customer_address', 'customer_city', 'customer_postal_code',
'customer_province', 'customer_id','customer_phone', 'vehicle_description','vehicle_color','vehicle_price']
# Streamlit App
st.title("Vehicle Information Extractor")
st.write("Upload a PDF file to extract vehicle information.")
uploaded_file = st.file_uploader("Choose a PDF file", type="pdf")
use_default = st.checkbox("Use Default Pdf")
doc = None
if use_default:
default_pdf_path = "pedido V.O.pdf"
if os.path.exists(default_pdf_path):
print("Present")
doc = fitz.open(default_pdf_path)
st.write("Using default PDF:")
else:
st.error("Default PDF not found.")
else:
if uploaded_file is not None:
with open("temp.pdf", "wb") as f:
f.write(uploaded_file.read())
doc = fitz.open("temp.pdf")
st.write("Uploaded PDF:")
if doc:
col1, col2 = st.columns(2)
with col1:
for page_num in range(len(doc)):
page = doc.load_page(page_num)
pix = page.get_pixmap()
img = Image.frombytes("RGB", [pix.width, pix.height], pix.samples)
st.image(img, caption=f"Page {page_num + 1}", use_column_width=True)
# Perform OCR
ocr_result = ocr.ocr(default_pdf_path if use_default else "temp.pdf")
extracted_text = []
for page in ocr_result:
for result in page:
text = result[1][0]
extracted_text.append(text)
all_text = " ".join(extracted_text)
prompt_text = """Task: Analyze the {all_text} and find out given entity value:{entity} from the {all_text}:
Output Format: A table with the entity and value. First column contains the {entity} and second column contains the value fetched from the {all_text}.
Do not include any additional explanations or unnecessary details.
{format_instructions}"""
parser = PydanticOutputParser(pydantic_object=CarInfoEntity)
prompt = PromptTemplate(
template=prompt_text,
input_variables=["all_text", "entity"],
partial_variables={"format_instructions": parser.get_format_instructions()},
)
chain = prompt | model | parser
output = chain.invoke({"all_text": all_text, "entity": entity})
with col2:
st.write("Extracted Vehicle Information (Table):")
st.table(output)
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