import os
import presentation_assistant.env_set as env
env.env_set()
print(os.getcwd())

import streamlit as st
import PyPDF2
import subprocess
from io import BytesIO
from pptx import Presentation


import presentation_assistant.presentation_assistant as pa

tab1, tab2, tab3 = st.tabs(['What is PA!?', 'Text2PPT', 'PPT2Script'])

with tab1:
    st.header('Introduction')
    st.title('PA!(Presentation Assistant):sparkles:')
    contents = """
    ▶ Based on the content entered by the user, it :blue[automatically creates] PPT and
      provides a presentation :red[script] to improve presentation skills!"""
    st.markdown(contents)
    st.markdown('-------------------------')
    st.header('How to use')
    st.subheader('Text2PPT')
    contents = """
    ▶ If the user provides a link or file, we will :blue[create a presentation material] for you!
      The user only needs to select the desired theme (template) type and number of pages!"""
    st.markdown(contents)
    st.subheader('PPT2Script')
    contents = """
    ▶ If the user provides PPT or PDF presentation materials, we will automatically create a :blue[presentation script] for you!"""
    st.markdown(contents)

    # Test
    # test_ppt_theme = "--reference-doc="+"/home/user/app/template/blue"+".pptx"
    # subprocess.run(["/home/user/app/pandoc-2.14.2/bin/pandoc", "text2ppt_test.md", "-t", "pptx", test_ppt_theme, "-o", "output.pptx"], capture_output=True)
    # print(os.listdir(os.getcwd()))
    # prs = Presentation("output.pptx")
    # binary_output = BytesIO()
    # prs.save(binary_output)
    # st.download_button(label="Download PPT",
    #                  data = binary_output.getvalue(),
    #                 file_name="export_output.pptx",
    #                 mime='application/octet-stream', key = "<Text2PPT_test_download>")


with tab2:
    st.header('Text2PPT')
    st.subheader(':computer: PPT Auto Generator :computer:')

    thema_select = st.selectbox(
        'Please select the template you want.',
        ['default', 'yellow', 'gradation_green', 'blue', 'green', 'custom'])
    
    if thema_select == "custom":
        uploaded_template_file = st.file_uploader('Choose File!', type='pptx', key="<template_uploader>")

    st.markdown('-------------------------')

    page_choice = st.slider('Number of PPT pages', min_value=2, max_value=12, step=1, value=5)

    st.markdown('-------------------------')

    my_order = ['Text', 'Link', 'PDF']
    status = st.radio('Please select the file type and enter the content! :smile: ', my_order)

    # First method
    if status == my_order[0]:
        input_text = st.text_area('Enter TEXT', height=5)

    elif status == my_order[1]:
        input_text = st.text_area('Enter URL', height=5)

    elif status == my_order[2]:
        input_text = st.file_uploader('Upload PDF', type=['pdf'])

    input_text_check = st.button('Confirm', key="<Text2PPT_start>")

    st.markdown('-------------------------')

    if input_text_check == True:
        with st.spinner('Wait for it...'):
            pa.text2ppt(pa.generate_text2ppt_input_prompt(status, input_text, page_choice), thema_select)
            prs = Presentation("text2ppt_output.pptx")
            binary_output = BytesIO()
            prs.save(binary_output)
        st.success('Done!')
        st.download_button(label="Download PPT",
                            data = binary_output.getvalue(),
                            file_name="export_output.pptx",
                            mime='application/octet-stream', key = "<Text2PPT_download>")

with tab3:
    st.header('PPT2Script')
    st.subheader(':computer: Script Auto Generator :computer:')
    st.markdown('-------------------------')

    st.subheader(':bookmark: Presentation Script Generator')

    file_order = ['PDF', 'PPT']
    choose = st.radio('Please select the file format of the presentation material', file_order)

    if choose == file_order[0]:
        uploaded_file = st.file_uploader('Choose File!', type='pdf', key="<PPT2Script_pdf_uploader>")
    elif choose == file_order[1]:
        uploaded_file = st.file_uploader('Choose File!', type='pptx', key="<PPT2Script_ppt_uploader>")

    input_file_check = st.button('Confirm', key="<PPT2Script_start>")  # When this button is pressed, the input file should be passed
    st.markdown('-------------------------')

    if input_file_check == True:
        with st.spinner('Wait for it...'):
            with open(uploaded_file.name, mode='wb') as w:
                w.write(uploaded_file.getvalue())

            script = pa.ppt2script(uploaded_file.name, choose)

        st.success('Done!')
        st.download_button('Download Script',
                           data=script, file_name="script_output.txt", key="<PPT2Script_download>")