#!/usr/bin/env python3
"""Batch front-end for videoclean."""
from __future__ import annotations

import argparse
import shutil
import subprocess
import sys
from pathlib import Path

VIDEO_EXTENSIONS = {".mp4", ".mkv", ".mov", ".m4v", ".avi", ".webm"}


def main() -> int:
    parser = argparse.ArgumentParser(description="Batch-clean videos with videoclean")
    parser.add_argument("source", help="Video file or directory")
    parser.add_argument("-o", "--output", help="Output directory")
    parser.add_argument("--clean", action="store_true", help="Compatibility flag; cleaning is the default")
    parser.add_argument("--no-clean", "--copy", action="store_true", help="Copy files without cleaning")
    parser.add_argument("-y", "--yes", action="store_true", help="Run without confirmation")
    parser.add_argument("--detect-mode", choices=["auto", "fast", "balanced", "sensitive"], default="auto")
    parser.add_argument("--inpaint-method", choices=["telea", "ns"], default="telea")
    parser.add_argument("--inpaint-radius", type=float, default=3.0)
    parser.add_argument("--inpaint-dilate", type=int, default=0)
    args = parser.parse_args()

    source = Path(args.source).expanduser().resolve()
    if source.is_file():
        videos = [source]
    elif source.is_dir():
        videos = sorted(path for path in source.iterdir() if path.suffix.lower() in VIDEO_EXTENSIONS)
    else:
        parser.error(f"source does not exist: {source}")
    if not videos:
        parser.error(f"no videos found in {source}")

    output = Path(args.output).expanduser().resolve() if args.output else source.parent / f"{source.stem}_processed"
    output.mkdir(parents=True, exist_ok=True)
    python = Path(__file__).resolve().parent / ".venv" / "bin" / "python"
    if not python.exists():
        python = Path(sys.executable)

    for video in videos:
        destination = output / f"{video.stem}.mp4"
        if args.no_clean:
            shutil.copy2(video, destination)
            continue
        command = [
            str(python), "-m", "videoclean.cli", "clean", str(video),
            "-o", str(output), "--detect-mode", args.detect_mode,
            "--inpaint-method", args.inpaint_method,
            "--inpaint-radius", str(args.inpaint_radius),
            "--inpaint-dilate", str(args.inpaint_dilate),
        ]
        result = subprocess.run(command)
        if result.returncode:
            return result.returncode
        generated = output / f"{video.stem}_clean.mp4"
        if generated.exists() and generated != destination:
            generated.replace(destination)
    return 0


if __name__ == "__main__":
    raise SystemExit(main())