import logging
import shutil
import tempfile
import subprocess
from pathlib import Path
from moviepy.editor import VideoFileClip
import gradio as gr
import requests
from urllib.parse import urlparse

logging.basicConfig(level=logging.INFO)

def download_file(url, destination):
    """Downloads a file from a url to a destination."""
    response = requests.get(url)
    response.raise_for_status()
    with open(destination, 'wb') as f:
        f.write(response.content)

def get_input_path(video_file, video_url, temp_dir):
    """Returns the path to the video file, downloading it if necessary."""
    if video_file is not None:
        return Path(video_file.name)
    elif video_url:
        url_path = urlparse(video_url).path
        file_name = Path(url_path).name
        destination = temp_dir / file_name
        download_file(video_url, destination)
        return destination
    else:
        raise ValueError("No input was provided.")

def get_output_path(input_path, temp_dir):
    """Returns the path to the output file, creating it if necessary."""
    output_path = temp_dir / (Path(input_path).stem + ".m3u8")
    return output_path

def get_aspect_ratio(input_path, aspect_ratio):
    """Returns the aspect ratio of the video, calculating it if necessary."""
    if aspect_ratio is not None:
        return aspect_ratio
    video = VideoFileClip(str(input_path))
    return f"{video.size[0]}:{video.size[1]}"

def convert_video(video_file, quality, aspect_ratio, video_url):
    """Converts a video to HLS format, adjusting the quality and aspect ratio as necessary."""
    with tempfile.TemporaryDirectory() as temp_dir:
        temp_dir = Path(temp_dir)
        input_path = get_input_path(video_file, video_url, temp_dir)
        output_path = get_output_path(input_path, temp_dir)
        aspect_ratio = get_aspect_ratio(input_path, aspect_ratio)

        ffmpeg_command = [
            "ffmpeg", "-i", str(input_path), "-c:v", "libx264", "-crf", str(quality),
            "-vf", f"scale=-1:720,setsar={aspect_ratio}", "-hls_time", "6",
            "-hls_playlist_type", "vod", "-f", "hls", str(output_path)
        ]

        try:
            logging.info("Running command: %s", " ".join(ffmpeg_command))
            subprocess.run(ffmpeg_command, check=True, timeout=600)
        except subprocess.CalledProcessError:
            logging.exception("ffmpeg command failed.")
            return "ffmpeg command failed."
        except subprocess.TimeoutExpired:
            logging.exception("ffmpeg command timed out.")
            return "ffmpeg command timed out."
        except FileNotFoundError:
            logging.exception("ffmpeg is not installed.")
            return "ffmpeg is not installed."
        except Exception as e:
            logging.exception("An error occurred.")
            return f"An error occurred: {str(e)}"

        # Copy the output to a new temporary file that won't be deleted when the
        # TemporaryDirectory context manager exits.
        output_copy_path = shutil.copy2(output_path, tempfile.gettempdir())

    return output_copy_path

def main():
    video_file = gr.inputs.File(label="Video File", type="file")
    quality = gr.inputs.Dropdown(
        choices=["18", "23", "28", "32"], label="Quality", default="23")
    aspect_ratio = gr.inputs.Dropdown(
        choices=[None, "1:1", "4:3", "3:2", "5:4", "16:9", "21:9", 
                 "1.85:1", "2.35:1", "3:1", "360", "9:16", "16:9", 
                 "2:1", "1:2", "9:1"], 
        label="Aspect Ratio", default=None) 
    video_url = gr.inputs.Textbox(label="Video URL")

    gr.Interface(convert_video, inputs=[video_file, quality, aspect_ratio, video_url], outputs='file').launch()

if __name__ == "__main__":
    main()