app.py

import os
import gradio as gr

from config import DEFAULT_REGION, FIXED_WIDTH, FIXED_HEIGHT, FIXED_FPS, FIXED_DURATION
from handlers.video_generation_type import generate_single_shot, refresh_listing

with gr.Blocks(title="Nova Reel — Text → Video (Single-shot)") as demo:
    gr.Markdown(
        f"# 🎬DEval Nova Reel 1:0 — Text/Image → Video\n"
        f"**Single-shot only.** Fixed **{FIXED_WIDTH}×{FIXED_HEIGHT} @ {FIXED_FPS} fps**, duration **{FIXED_DURATION}s**.\n"
        "Starts an async job, polls until completion, then downloads `output.mp4` from your S3 path."
    )

    with gr.Row():
        with gr.Column(scale=2):
            prompt = gr.Textbox(
                label="Prompt",
                placeholder="Closeup of a cute old steampunk robot riding a horse. Camera zoom in.",
                lines=4,
            )
            reference_image = gr.Image(
                label="Optional reference image (PNG/JPEG, ideally 1280×720)",
                type="filepath",
            )
        with gr.Column(scale=1):
            s3_uri = gr.Textbox(
                label="S3 output base URI",
                value="s3://bucketvideogenerationwest",
                placeholder="s3://your-bucket[/optional/prefix]",
            )
            region = gr.Textbox(label="AWS Region", value=DEFAULT_REGION)
            seed = gr.Textbox(label="Seed (optional)", value="", placeholder="leave blank for random")
            custom_name = gr.Textbox(
                label="Video name (optional)",
                placeholder="Defaults to part of the prompt",
                value=""
            )
            go = gr.Button("🚀 Generate")

    with gr.Row():
        vid = gr.Video(label="Generated Video")
        status = gr.Markdown("", elem_id="status")

    gr.Markdown("### 📼 Videos already in this bucket/prefix")
    table = gr.Dataframe(
        headers=["Key", "Size (MB)", "Last Modified (UTC)", "S3 URI"],
        interactive=False,
        wrap=False,
        label="Existing .mp4 objects"
    )
    refresh_btn = gr.Button("🔄 Refresh list")

    go.click(
        fn=generate_single_shot,
        inputs=[prompt, s3_uri, seed, region, reference_image, custom_name],
        outputs=[vid, status, table],
        api_name="generate"
    )

    refresh_btn.click(
        fn=refresh_listing,
        inputs=[s3_uri, region],
        outputs=[table]
    )

    s3_uri.change(
        fn=refresh_listing,
        inputs=[s3_uri, region],
        outputs=[table]
    )

if __name__ == "__main__":
    auth_user = os.getenv("USER")
    auth_pass = os.getenv("PASS")
    demo.queue().launch(
        auth=(auth_user, auth_pass), share=True,  ssr_mode=False
    )