from fastapi import APIRouter
from pydantic import BaseModel
from tempfile import TemporaryDirectory
from glob import iglob
from pdf.processor import extract_text
from core.config import settings
import base64
import os
import zipfile
import json

router = APIRouter()

class ExtractionRequest(BaseModel):
    pdf_zip: str # Base64 encoded zip file

@router.post("/extraction")
async def extraction(request: ExtractionRequest):
    base_dir = settings.BASE_DIR
    pdf_zip = base64.b64decode(request.pdf_zip)
    with TemporaryDirectory(dir=base_dir, prefix=f'tmp_', ignore_cleanup_errors=True) as temp_dir:
        # Save the zip file to a temporary directory
        pdf_zip_path = os.path.join(temp_dir, 'pdf.zip')
        with open(pdf_zip_path, 'wb') as f:
            f.write(pdf_zip)
        pdf_dir = os.path.join(temp_dir, 'pdf')

        # Extract the PDFs from the zip file
        with zipfile.ZipFile(pdf_zip_path, 'r') as zip_ref:
            zip_ref.extractall(pdf_dir)

        # Extract text from the PDFs
        pattern = os.path.join(pdf_dir, '*.pdf')
        extracted_texts = dict()
        for pdf_path in iglob(pattern):
            pdf_name = os.path.basename(pdf_path)
            extracted_text = extract_text(pdf_path)
            extracted_texts[pdf_name] = extracted_text
        extracted_texts = json.dumps(extracted_texts).encode('utf-8')
        return {
            'status': 'success',
            'data': base64.b64encode(extracted_texts).decode('utf-8')
        }