"""Autostart beim Anmelden (Windows: Registry Run-Key, macOS: LaunchAgent, Linux: XDG-Autostart)."""
import os
import plistlib
import shlex
import sys
from pathlib import Path

from .config import SYSTEM

LABEL = "de.netclip.client"


def command() -> list[str]:
    if getattr(sys, "frozen", False):
        return [sys.executable, "--minimized"]
    return [sys.executable, "-m", "netclip", "--minimized"]


def _linux_file() -> Path:
    base = Path(os.environ.get("XDG_CONFIG_HOME", Path.home() / ".config"))
    return base / "autostart" / "netclip.desktop"


def _mac_file() -> Path:
    return Path.home() / "Library" / "LaunchAgents" / f"{LABEL}.plist"


def set_enabled(enabled: bool):
    cmd = command()
    if SYSTEM == "Windows":
        import winreg
        key = winreg.OpenKey(winreg.HKEY_CURRENT_USER, r"Software\Microsoft\Windows\CurrentVersion\Run",
                             0, winreg.KEY_SET_VALUE)
        with key:
            if enabled:
                winreg.SetValueEx(key, "NetClip", 0, winreg.REG_SZ, " ".join(f'"{c}"' for c in cmd))
            else:
                try:
                    winreg.DeleteValue(key, "NetClip")
                except FileNotFoundError:
                    pass
    elif SYSTEM == "Darwin":
        f = _mac_file()
        if enabled:
            f.parent.mkdir(parents=True, exist_ok=True)
            f.write_bytes(plistlib.dumps({"Label": LABEL, "ProgramArguments": cmd, "RunAtLoad": True}))
        else:
            f.unlink(missing_ok=True)
    else:
        f = _linux_file()
        if enabled:
            f.parent.mkdir(parents=True, exist_ok=True)
            f.write_text("[Desktop Entry]\nType=Application\nName=NetClip\n"
                         f"Exec={shlex.join(cmd)}\nIcon=edit-paste\nX-GNOME-Autostart-enabled=true\n")
        else:
            f.unlink(missing_ok=True)