import fitz  # PyMuPDF
import openai
import gradio as gr

class IncorrectSentenceFinder:
    """
    This class finds and displays grammatically incorrect sentences in a PDF document using OpenAI's GPT-3.

    Args:
        pdf_file (str): The path to the PDF file.
    """

    def __init__(self):
        """
        Initialize the IncorrectSentenceFinder with the OpenAI API key.
        """
        # openai.api_key = openai_api_key
        pass

    def _find_incorrect_sentence(self, text: str) -> str:
        """
        Use OpenAI's GPT-3 to identify grammatically incorrect sentences in the given text.

        Args:
            text (str): Text to check for grammatical errors.

        Returns:
            str: Grammatically incorrect sentences identified by GPT-3.
        """
        # Create a request to OpenAI's GPT-3 engine to identify grammatically incorrect sentences.
        response = openai.Completion.create(
            engine="text-davinci-003",
            prompt=f"list out the grammatical error sentence in the given text:\n{text}",
            temperature=0,
            max_tokens=1000,
        )

        # Extract and strip the text of identified grammatically incorrect sentences from the GPT-3 response.
        incorrect_sentences = response.choices[0].text.strip()
        return incorrect_sentences

    def get_incorrect_sentence(self, pdf_file: str) -> str:
        """
        Extract text from the PDF document and find grammatically incorrect sentences.

        Returns:
            str: Grammatically incorrect sentences identified by GPT-3.
        """
        try:
            # Open the PDF file using PyMuPDF's fitz library
            doc = fitz.open(pdf_file.name)
            incorrect_sentences = ''
            # Iterate through each page in the PDF document and extract the text
            for page in doc:
                text = page.get_text()
                incorrect_sentences += self._find_incorrect_sentence(text)
            return incorrect_sentences

        except Exception as e:
            print(f"An error occurred: {str(e)}")
    def file_output_fnn(self,file_path):
        file_path = file_path.name
        return file_path      

    def gradio_interface(self):
        with gr.Blocks(css="style.css",theme='xiaobaiyuan/theme_brief') as demo:    
            with gr.Row(elem_id = "col-container",scale=0.80):
              with gr.Column(elem_id = "col-container",scale=0.80):
                file1 = gr.File(label="File",elem_classes="filenameshow")
            
              with gr.Column(elem_id = "col-container",scale=0.20):  
                upload_button1 = gr.UploadButton(
                    "Browse File",file_types=[".txt", ".pdf", ".doc", ".docx",".json",".csv"],
                    elem_classes="uploadbutton")
                incorrect_sentence = gr.Button("Get Headings",elem_classes="uploadbutton")
            
            with gr.Row(elem_id = "col-container",scale=0.60):    
                headings = gr.Textbox(label = "Headings")

        upload_button1.upload(self.file_output_fnn,upload_button1,file1)
        incorrect_sentence.click(self.get_incorrect_sentence,upload_button1,headings)