#!/usr/bin/env python3
"""
Sum durations of many media files by calling ffprobe once per file.

This program is GPT-5 Mini output.

Usage:
  python3 ffprobe_total_duration.py file1.mp3 file2.mp4 ...
"""
import sys
import subprocess
from datetime import timedelta

def get_duration_seconds(path):
    # Use ffprobe to return duration in seconds (float); robust and quiet.
    cmd = [
        "ffprobe", "-v", "error",
        "-show_entries", "format=duration",
        "-of", "default=noprint_wrappers=1:nokey=1",
        path
    ]
    out = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
    if out.returncode != 0:
        raise RuntimeError(f"ffprobe failed for {path}: {out.stderr.strip()}")
    s = out.stdout.strip()
    if not s:
        raise RuntimeError(f"No duration reported for {path}")
    return float(s)

def format_timedelta(total_seconds):
    td = timedelta(seconds=total_seconds)
    # Keep fractional seconds to 3 decimal places
    total_ms = int(round(td.total_seconds() * 1000))
    secs, ms = divmod(total_ms, 1000)
    hours, rem = divmod(secs, 3600)
    minutes, seconds = divmod(rem, 60)
    return f"{hours:02d}:{minutes:02d}:{seconds:02d}.{ms:03d}"

def main(args):
    if not args:
        print("Usage: ffprobe_total_duration.py file1 file2 ...", file=sys.stderr)
        sys.exit(2)
    total = 0.0
    for p in args:
        try:
            d = get_duration_seconds(p)
            total += d
        except Exception as e:
            print(f"Warning: {e}", file=sys.stderr)
    print(format_timedelta(total))

if __name__ == "__main__":
    main(sys.argv[1:])