import gradio as gr

def add_line_breaks(file, position):
    try:
        # Read the text from the uploaded file
        text = file.read()

        # Ensure position is within valid range
        position = max(0, min(position, len(text)))

        # Insert \n at the specified position
        modified_text = text[:position] + "\n" + text[position:]

        return modified_text
    except Exception as e:
        return f"Error: {str(e)}"

def main():
    with gr.Blocks() as demo:
        gr.Markdown("# Text Line Break Adder")

        with gr.Row():
            file_input = gr.File(label="Upload Text File", placeholder="Select a .txt file")
            position_input = gr.Number(label="Position to Insert Line Break", 
                                     placeholder="Enter position (0-based index)",
                                     value=0)

        with gr.Row():
            add_button = gr.Button("Add Line Break")
            text_output = gr.Textbox(label="Modified Text", lines=10)

        add_button.click(
            fn=add_line_breaks,
            inputs=[file_input, position_input],
            outputs=text_output
        )

    demo.launch()

if __name__ == "__main__":
    main()