import gradio as gr
import tempfile
import subprocess
from pathlib import Path

def convert_webm_to_mp4(webm_file):
    """
    Recebe um arquivo WebM, converte para MP4 e retorna o caminho do MP4.
    """
    if webm_file is None:
        # MP4 dummy se nenhum WebM for enviado
        return "https://sample-videos.com/video123/mp4/240/big_buck_bunny_240p_1mb.mp4"

    tmp_dir = tempfile.mkdtemp()
    mp4_path = Path(tmp_dir) / "output.mp4"

    try:
        subprocess.run([
            "ffmpeg",
            "-y",
            "-i", webm_file.name,
            "-c:v", "libx264",
            "-preset", "fast",
            "-pix_fmt", "yuv420p",
            str(mp4_path)
        ], check=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    except subprocess.CalledProcessError as e:
        return f"Error converting video: {e.stderr.decode()}"

    return mp4_path

# Interface explícita, compatível com App Builder
iface = gr.Interface(
    fn=convert_webm_to_mp4,
    inputs=gr.Video(label="WebM Input"),
    outputs=gr.Video(label="MP4 Output"),
    allow_flagging="never"
)

if __name__ == "__main__":
    # Garantir que a primeira função do Space (Index 0) seja essa
    iface.launch(server_name="0.0.0.0", server_port=7860, share=True)