import gradio as gr
import requests
import os
import re

# Fetch the keys from the environment variable and convert them into a list
YOUTUBE_API_KEYS = os.getenv("YOUTUBE_API_KEYS")

if YOUTUBE_API_KEYS:
    YOUTUBE_API_KEYS = [key.strip() for key in YOUTUBE_API_KEYS.split(",")]
else:
    raise ValueError("API keys not found. Make sure the secret 'YOUTUBE_API_KEYS' is set.")

# Index to keep track of which API key to use
key_index = 0

def get_api_key():
    global key_index
    api_key = YOUTUBE_API_KEYS[key_index]
    key_index = (key_index + 1) % len(YOUTUBE_API_KEYS)  # Rotate to the next key
    return api_key

def youtube_search(query, upload_date, video_type, duration, sort_by, max_results=50):
    search_url = "https://www.googleapis.com/youtube/v3/search"
    all_results = []
    params = {
        "part": "snippet",
        "q": query,
        "type": "video",
        "maxResults": 50,
        "order": sort_by
    }

    # Add filter parameters based on user selection
    if upload_date:
        params["publishedAfter"] = upload_date
    if video_type and video_type != "All":
        params["type"] = video_type.lower()  # API expects lowercase values
    if duration:
        params["videoDuration"] = duration  # Set duration parameter for filtering

    try:
        while len(all_results) < max_results:
            params["key"] = get_api_key()
            response = requests.get(search_url, params=params)

            if response.status_code in [403, 429]:
                print(f"Quota exceeded or forbidden for API key. Trying next key...")
                continue
            response.raise_for_status()

            results = response.json().get("items", [])
            for result in results:
                video_info = {
                    'thumbnail_url': result["snippet"]["thumbnails"]["high"]["url"],
                    'video_id': result["id"]["videoId"],
                    'title': result["snippet"]["title"]
                }
                all_results.append(video_info)

            if 'nextPageToken' not in response.json() or len(all_results) >= max_results:
                break

            params['pageToken'] = response.json()['nextPageToken']

        return all_results

    except requests.exceptions.RequestException as e:
        print(f"Error during YouTube API request: {e}")
        return []

def show_video(video_url):
    video_id = None
    patterns = [
        r"youtube\.com/watch\?v=([^\&\?\/]+)",
        r"youtube\.com/embed/([^\&\?\/]+)",
        r"youtube\.com/v/([^\&\?\/]+)",
        r"youtu\.be/([^\&\?\/]+)"
    ]

    for pattern in patterns:
        match = re.search(pattern, video_url)
        if match:
            video_id = match.group(1)
            break

    if not video_id:
        return "Invalid YouTube URL. Please enter a valid YouTube video link."

    embed_url = f"https://www.youtube.com/embed/{video_id}"

    html_code = f'''
    <iframe width="100%" height="562" src="{embed_url}" 
    frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" 
    allowfullscreen></iframe>
    '''
    return html_code

with gr.Blocks(css="""
#search_output {
    max-width: 1300px;
}
#search_output img {
    width: 150px !important;
    height: 150px !important;
    margin-right: 10px;
}
#search_output .gallery-item {
    display: flex !important;
    align-items: center !important;
    margin-bottom: 30px !important;
}
#search_output .gallery-caption {
    text-align: left !important;
    padding-left: 20px;
    font-size: 24px !important;
}
#video_container {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 1500px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 8px;
}
""") as demo:
    gr.Markdown("## YouTube Video Search, Selection, and Playback")
    video_ids_state = gr.State()

    with gr.Row(elem_id="video_container"):
        video_output = gr.HTML(label="Video Player", elem_id="video_output")

    with gr.Row():
        selected_video_link = gr.Textbox(label="Selected Video Link", interactive=False)
        play_video_button = gr.Button("Play Video")

    with gr.Row():
        with gr.Column(scale=3):
            search_query_input = gr.Textbox(label="Search YouTube", 
                                            placeholder="Enter your search query here", 
                                            elem_id="search_query_input")
            upload_date_input = gr.Dropdown(label="Upload Date", choices=["", "Last Hour", "Today", "This Week", "This Month", "This Year"])
            video_type_input = gr.Dropdown(label="Type", choices=["All", "Video", "Channel", "Playlist", "Movie"])
            duration_input = gr.Dropdown(label="Duration", choices=["", "Short (<4 mins)", "Medium (4-20 mins)", "Long (>20 mins)"])
            sort_by_input = gr.Dropdown(label="Sort By", choices=["relevance", "date", "viewCount", "rating"], value="relevance")
            search_button = gr.Button("Search")
            search_output = gr.Gallery(label="Search Results", columns=1, height="800px", elem_id="search_output")

    def update_search_results(query, upload_date, video_type, duration, sort_by):
        # Map the filter values to YouTube API parameters
        upload_date_mapping = {
            "Last Hour": "now-1h",
            "Today": "now-1d",
            "This Week": "now-7d",
            "This Month": "now-30d",
            "This Year": "now-365d"
        }

        duration_mapping = {
            "Short (<4 mins)": "short",
            "Medium (4-20 mins)": "medium",
            "Long (>20 mins)": "long"
        }

        # Convert user-friendly values to API-compatible parameters
        upload_date_param = upload_date_mapping.get(upload_date, "")
        duration_param = duration_mapping.get(duration, "")

        search_results = youtube_search(query, upload_date_param, video_type, duration_param, sort_by)
        gallery_items = []
        video_ids = []
        for item in search_results:
            image_url = item['thumbnail_url']
            title = item['title']
            caption = f"{title}"
            gallery_items.append((image_url, caption))
            video_ids.append(item['video_id'])
        return gallery_items, video_ids

    def on_video_select(evt: gr.SelectData, video_ids):
        index = evt.index
        selected_video_id = video_ids[index]
        video_url = f"https://www.youtube.com/watch?v={selected_video_id}"
        return video_url

    def play_video(video_url):
        return show_video(video_url)

    search_button.click(update_search_results, inputs=[search_query_input, upload_date_input, video_type_input, duration_input, sort_by_input], outputs=[search_output, video_ids_state])
    search_output.select(on_video_select, inputs=video_ids_state, outputs=selected_video_link)
    play_video_button.click(play_video, inputs=selected_video_link, outputs=video_output)

demo.launch()