import streamlit as st
import requests
import os
from facebook_business.api import FacebookAdsApi
from facebook_business.adobjects.page import Page

# Configuración de la API de Facebook
app_id = '938014541005623'
app_secret = '938014541005623'
access_token = 'EAANVHoeCwzcBO5HGarhHCZApZBIUn2BAWBUZAs48Nki1ihHvg9vqpznwR1TFZBDRpfKz7HB6LyokEm8SHOYIgtjKXCrBtGuyHNFy5dHRtaO8fk4YZC9WHAN7McWTYCcJMuiMazZAaAd4ABemvABkhEeAkY82oxlwSgu4p06UC0SDLiWJO8G7emFp6A9ZA3DSs7oLvfGZB0mje5SYJnu5EMvDN6aApHEcvMOD1TlF1fwD7Fxx0ZCnNdUBPW8nx3m878Ds40KTkPAGjTfq4'
FacebookAdsApi.init(app_id, app_secret, access_token)
page_id = '108592224897536'

# Subir Reel a la página
@st.cache_data
def upload_reel_to_page(page_id, video_file, description, title):
    # Paso 1: Inicializar una sesión de carga
    start_upload_url = f"https://graph.facebook.com/v18.0/{page_id}/video_reels"
    start_upload_data = {
        "upload_phase": "start",
        "access_token": access_token
    }
    start_response = requests.post(start_upload_url, json=start_upload_data)
    start_response_json = start_response.json()
    upload_session_id = start_response_json.get("upload_session_id")

    # Paso 2: Subir el video
    transfer_binary_url = f"https://rupload.facebook.com/video-upload/v18.0/{upload_session_id}"
    transfer_binary_headers = {
        "Authorization": f"OAuth {access_token}",
        "offset": "0",
        "file_size": str(len(video_file))
    }
    transfer_binary_response = requests.post(transfer_binary_url, headers=transfer_binary_headers, data=video_file)

    # Paso 3: Publicar el Reel
    complete_url = f"https://graph.facebook.com/v18.0/{page_id}/video_reels"
    complete_params = {
        "upload_phase": "finish",
        "upload_session_id": upload_session_id,
        "description": description,
        "title": title,
        "access_token": access_token,
        "video_state": "PUBLISHED"
    }
    complete_response = requests.post(complete_url, params=complete_params)
    complete_response_json = complete_response.json()

    return {
        "start_response": start_response_json,
        "transfer_binary_response": transfer_binary_response.text,
        "complete_response": complete_response_json
    }

# Interfaz de usuario
st.title('Subir Reel a Facebook')

video_path = st.file_uploader('Seleccionar Reel (Formato: .mp4)')
description = st.text_area('Descripción del Reel')
title = st.text_input('Título del Reel')

if st.button('Subir Reel'):
    if access_token and video_path and description and title:
        # Obtener el acceso al archivo de video
        video_file = video_path.read()
        
        upload_response = upload_reel_to_page(page_id, video_file, description, title)
        st.success(f'El Reel se ha subido exitosamente a la página de Facebook. Respuesta: {upload_response}')
    else:
        st.error('Por favor completa todos los campos, incluyendo el Token de Acceso')