import requests
import shutil
import os
import re

# Searching for the videos
def search_pexels(keyword, api_key, orientation='potrait', size='medium', endpoint='videos', num_pages=50):
    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, links, i):
    for x in data['videos']:
        if x['id'] in links:
            continue
        
        vid = x['video_files']
        for v in vid: 
            if v['height'] == height and v['width'] == width:
                video_id = str(x['id'])
                video_path = os.path.join(parent_path, f"{i}_{video_id}.mp4")
                with open(video_path, 'wb') as f:
                    f.write(requests.get(v['link']).content)
                    print("Successfully saved video in", video_path)
                    return video_id

# Utilizing the LLMs to find the relevant videos 
def generate_videos(product, api_key, orientation, height, width, llm_chain=None, sum_llm_chain=None):
    prod = product.strip().replace(" ", "_")
    links = []
    try:
        # Split the paragraph by sentences
        sentences = llm_chain.run(product.strip())
        print('Sentences:', sentences)
        
        # Tách các câu từ văn bản
        sentences = [x.strip() for x in re.split(r'[.!?]', sentences) if len(x.strip()) > 6]
    
        # Sử dụng UUID để tạo tên thư mục ngắn gọn
        folder_name = f"video_{uuid.uuid4().hex}"
        os.makedirs(folder_name, exist_ok=True)
        folder_path = os.path.join(folder_name, "images")
        os.makedirs(folder_path, exist_ok=True)
        
        # Generate video for every sentence
        print("Keywords:")
        for i, s in enumerate(sentences):
            keyword = sum_llm_chain.run(s)
            print(i + 1, ":", keyword)
            data = search_pexels(keyword, api_key, orientation.lower())
            link = download_video(data, folder_path, height, width, links, i)
            if link:
                links.append(link)
            
        print("Success! Videos have been generated")
    except Exception as e:
        print("Error! Failed generating videos")
        print(e)
    
    return folder_name, sentences