app.py

import gradio as gr
from utils import process_video  # Ensure this points to the updated utils.py

# Define supported languages
language_map = {
    "English": None,
    "Hindi": "Helsinki-NLP/opus-mt-en-hi",
    "Spanish": "Helsinki-NLP/opus-mt-en-es",
    "French": "Helsinki-NLP/opus-mt-en-fr",
    "German": "Helsinki-NLP/opus-mt-en-de",
    "Telugu": "facebook/nllb-200-distilled-600M",
    "Portuguese": "Helsinki-NLP/opus-mt-en-pt",
    "Russian": "Helsinki-NLP/opus-mt-en-ru",
    "Chinese": "Helsinki-NLP/opus-mt-en-zh",
    "Arabic": "Helsinki-NLP/opus-mt-en-ar",
    "Japanese": "Helsinki-NLP/opus-mt-en-jap"
}

# Custom CSS for dark mode and animations
css = """
body { 
    background-color: #1a1a1a;
    color: #e0e0e0;
    font-family: 'Arial', sans-serif;
}
.gradio-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.file-preview {
    border: 2px dashed #6c757d;
    padding: 20px;
    border-radius: 10px;
}
.progress-text {
    font-size: 16px;
    color: #28a745;
    animation: blink 1s infinite;
}
@keyframes blink {
    50% { opacity: 0.5; }
}
"""

# Define Gradio Interface
with gr.Blocks(theme=gr.themes.Monochrome(), css=css) as demo:
    gr.Markdown("# 🎥 AI-Powered Video Subtitling")
    gr.Markdown("Upload a video (MP4/MKV/AVI) and select a language to generate subtitles.")

    with gr.Row():
        with gr.Column(scale=2):
            video_input = gr.File(
                label="Upload Video File",
                file_types=["mp4", "mkv", "avi"],
                elem_classes=["file-preview"]
            )
        with gr.Column(scale=1):
            language_dropdown = gr.Dropdown(
                choices=list(language_map.keys()),
                label="Select Subtitle Language",
                value="English"
            )

    generate_button = gr.Button("Generate Subtitles 🚀")
    progress_text = gr.Textbox(
        label="Progress",
        interactive=False,
        elem_classes=["progress-text"]
    )
    output_srt = gr.File(label="Download Subtitles")

    def generate_subtitles(video_file, language):
        try:
            # Validate file type
            if not video_file.name.lower().endswith(('.mp4', '.mkv', '.avi')):
                return None, "❌ Invalid file type. Please upload an MP4, MKV, or AVI file."

            # Update progress
            progress = "🔄 Processing video..."
            yield None, progress  # Initial progress update

            # Process video
            srt_path = process_video(video_file.name, language)
            if srt_path:
                yield gr.File(srt_path), "✅ Subtitles generated successfully!"
            else:
                yield None, "❌ Error during processing. Check logs."
        except Exception as e:
            yield None, f"❌ Error: {str(e)}"

    generate_button.click(
        generate_subtitles,
        inputs=[video_input, language_dropdown],
        outputs=[output_srt, progress_text]
    )

demo.launch()