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import requests
import shutil,os,re

# Searching for the videos
def search_pexels(keyword, api_key, orientation='potrait', size='medium', endpoint='videos', num_pages=1):
    
  if orientation not in ['potrait', 'landscape', 'square']:
    raise Exception("Error! orientation must be one of {'square', 'landscape', 'potrait'}")

  if size not in ['medium', 'small', 'large']:
    raise Exception("Error! size must be one of ['medium', 'small', 'large']")

  base_url = 'https://api.pexels.com/'

  headers = {
      'Authorization': f'{api_key}'
  }

  url = f'{base_url}{endpoint}/search?query={keyword}&per_page={num_pages}&orientation={orientation}&size={size}'


  response = requests.get(url, headers=headers)

  # Check if request was successful (status code 200)
  if response.status_code == 200:
      data = response.json()
      return data
  else:
      print(f'Error: {response.status_code}')


# Video download function
def download_video(data, parent_path, height, width, i):
    for x in data['videos'][0]['video_files'] :
        
        if width != None and x['width'] < width:
            continue
        if height != None and x['height'] < height :
            continue
        
        vid = x
        print(vid['link'])
        with open(f"{os.path.join(parent_path,str(i) + '_' + str(vid['id']))}.mp4", 'bw') as f:
            f.write(requests.get(vid['link']).content)
            print("Sucessfully saved video in", os.path.join(parent_path,str(i) + '_' + str(vid['id'])) + '.mp4')
            break


# Utilizing the LLMs to find the relevant videos 
def generate_videos(product, api_key, orientation, llm_chain=None, sum_llm_chain=None):
    prod = product.replace(" ", "_")
    
    try :
        # Split the paragraph by sentences
            
        sentences = llm_chain.run(product)
        print('Sentence :', sentences)
        
#         sentences = sentences.split(".")[:-1]
        sentences = [x.strip() for x in re.split(r'\d+\.', sentences) if len(x) > 6]
    
        
        # Create directory with the product's name
        if os.path.exists(prod):
            shutil.rmtree(prod)
        os.mkdir(prod)
        
        # Generate video for every sentence
        print("Keyword :")
        for i,s in enumerate(sentences):
            keyword = sum_llm_chain.run(s)
            print(i+1, ":", keyword)
            data = search_pexels(keyword, api_key, orientation.lower())
            download_video(data, prod, height, width, i)
            
        print("Success! videos has been generated")
    except Exception as e :
        print("Error! Failed generating videos")
        print(e)
    
    return prod, sentences