#!/usr/bin/env python3
"""
Date/time clipboard utility for GNOME keyboard shortcuts.
Copies various date/time formats to clipboard for quick pasting.

Usage:
    datetime-clipboard.py wd    # ISO week.day (e.g., 51.2)
    datetime-clipboard.py 3t    # 360-time format (0-359)
    datetime-clipboard.py uid   # UUID first 8 chars
"""
import sys
import subprocess
from datetime import datetime
import uuid


def copy_to_clipboard(text):
    """Copy text to clipboard using wl-copy (Wayland) or xclip (X11) as fallback."""
    try:
        # Try wl-copy first (Wayland)
        subprocess.run(['wl-copy'], input=text.encode(), check=True)
    except FileNotFoundError:
        # Fallback to xclip (X11)
        try:
            subprocess.run(['xclip', '-selection', 'clipboard'],
                         input=text.encode(), check=True)
        except FileNotFoundError:
            print("Error: Neither wl-copy nor xclip found. Install wl-clipboard or xclip.",
                  file=sys.stderr)
            sys.exit(1)


def get_weekday():
    """ISO week.day format (e.g., 51.2)"""
    ywd = datetime.now().isocalendar()
    return f"{ywd[1]}.{ywd[2]}"


def get_360time():
    """Day divided into 360 parts (0-359)"""
    t = datetime.now()
    return str((t.hour * 60 + t.minute) // (1440 // 360))


def get_uid():
    """First 8 characters of UUID"""
    return str(uuid.uuid4())[:8]


def main():
    if len(sys.argv) < 2:
        print(__doc__)
        sys.exit(1)

    format_type = sys.argv[1].lower()

    formatters = {
        'wd': get_weekday,
        '3t': get_360time,
        'uid': get_uid,
    }

    if format_type not in formatters:
        print(f"Unknown format: {format_type}")
        print(__doc__)
        sys.exit(1)

    text = formatters[format_type]()
    copy_to_clipboard(text)

    # Optional: print to stdout for verification
    print(f"Copied to clipboard: {text}")


if __name__ == '__main__':
    main()