from pptx import Presentation

# load the uploaded file
input_path = "./tech_project_proposal_ideas_dark_theme.pptx"
output_path = "./new_pptx.pptx"

def to_title_case(text: str) -> str:
    if not text:
        return text
    # title case for slide titles (major words capitalized)
    return text.title()

def to_sentence_case(text: str) -> str:
    if not text:
        return text
    text = text.strip()
    if not text:
        return text
    # sentence case for bullet points
    return text[0].upper() + text[1:]

# open ppt
prs = Presentation(input_path)

for slide in prs.slides:
    for shape in slide.shapes:
        if not shape.has_text_frame:
            continue
        tf = shape.text_frame
        # heuristics: assume first shape (or largest font) in slide is the title
        if slide.shapes.index(shape) == 0 or "title" in shape.name.lower():
            for para in tf.paragraphs:
                para.text = to_title_case(para.text)
        else:
            for para in tf.paragraphs:
                para.text = to_sentence_case(para.text)

# save output
prs.save(output_path)

output_path