import os
import subprocess
import gradio as gr
from moviepy.editor import *
import requests
from datetime import datetime
import tempfile

# Configuración inicial
PEXELS_API_KEY = os.getenv("PEXELS_API_KEY")  # Configurar en variables de entorno

# Lista de voces válidas
VOICES = [
    "es-MX-DaliaNeural", "es-ES-ElviraNeural", 
    "es-AR-ElenaNeural", "en-US-JennyNeural",
    "fr-FR-DeniseNeural", "de-DE-KatjaNeural"
]

def descargar_video(url, output_path):
    """Descarga un video y lo guarda localmente"""
    try:
        response = requests.get(url, stream=True, timeout=15)
        with open(output_path, 'wb') as f:
            for chunk in response.iter_content(chunk_size=1024*1024):
                f.write(chunk)
        return True
    except Exception as e:
        print(f"Error descargando video: {str(e)}")
        return False

def generar_video(prompt, voz_seleccionada, musica=None):
    try:
        # 1. Generar voz
        voz_archivo = "voz.mp3"
        subprocess.run([
            'edge-tts',
            '--voice', voz_seleccionada,
            '--text', prompt,
            '--write-media', voz_archivo
        ], check=True)
        
        # 2. Buscar videos en Pexels
        headers = {"Authorization": PEXELS_API_KEY}
        response = requests.get(
            f"https://api.pexels.com/videos/search?query={prompt[:50]}&per_page=2",
            headers=headers,
            timeout=15
        )
        videos = response.json().get("videos", [])
        
        # 3. Descargar y procesar videos
        clips = []
        for v in videos[:2]:
            video_url = v["video_files"][0]["link"]
            temp_video = tempfile.NamedTemporaryFile(suffix=".mp4", delete=False)
            if descargar_video(video_url, temp_video.name):
                clip = VideoFileClip(temp_video.name).subclip(0, min(5, VideoFileClip(temp_video.name).duration))
                clips.append(clip)
        
        if not clips:
            raise Exception("No se pudieron cargar videos válidos")
        
        # 4. Procesar audio
        audio = AudioFileClip(voz_archivo)
        if musica:
            musica_clip = AudioFileClip(musica.name)
            if musica_clip.duration < audio.duration:
                musica_clip = musica_clip.loop(duration=audio.duration)
            audio = CompositeAudioClip([audio, musica_clip.volumex(0.3)])
        
        # 5. Crear video final
        final_clip = concatenate_videoclips(clips).set_audio(audio)
        output_path = f"video_{datetime.now().strftime('%Y%m%d_%H%M%S')}.mp4"
        final_clip.write_videofile(output_path, codec="libx264", audio_codec="aac", threads=2)
        
        return output_path
    except Exception as e:
        print(f"ERROR: {str(e)}")
        return None
    finally:
        # Limpieza
        if os.path.exists(voz_archivo):
            os.remove(voz_archivo)

# Interfaz Gradio
with gr.Blocks() as app:
    gr.Markdown("# 🎬 Generador de Videos Automático")
    
    with gr.Row():
        with gr.Column():
            prompt = gr.Textbox(label="Tema del video")
            voz = gr.Dropdown(label="Selección de voz", choices=VOICES, value="es-ES-ElviraNeural")
            musica = gr.File(label="Música de fondo (opcional)", file_types=[".mp3"])
            btn = gr.Button("Generar Video")
        
        with gr.Column():
            output = gr.Video(label="Resultado")

    btn.click(
        fn=generar_video,
        inputs=[prompt, voz, musica],
        outputs=output
    )

if __name__ == "__main__":
    app.launch(server_name="0.0.0.0", server_port=7860)