"""Registro de arranque automático al login (Windows / Linux)."""

import os
import subprocess
import sys
from pathlib import Path

from ..constants import APP_DIR, CONFIG_DIR, IS_WINDOWS
from .env_loader import _env_bool, load_env_file


def _marker_path() -> Path:
    return CONFIG_DIR / ".autostart_registered"


def _executable_command() -> tuple[str, list[str]]:
    if getattr(sys, "frozen", False):
        exe = Path(sys.executable).resolve()
        return str(exe), ["--start-engine"]
    runner = (APP_DIR / "runner.py").resolve()
    return sys.executable, [str(runner), "--start-engine"]


def _register_windows(exe: str, args: list[str]) -> None:
    task_name = "CloudRestoreAS"
    arg_str = " ".join(f'"{a}"' if " " in a else a for a in args)
    tr = f'"{exe}" {arg_str}'
    check = subprocess.run(
        ["schtasks", "/Query", "/TN", task_name],
        capture_output=True,
        creationflags=subprocess.CREATE_NO_WINDOW if hasattr(subprocess, "CREATE_NO_WINDOW") else 0,
    )
    if check.returncode == 0:
        return
    subprocess.run(
        [
            "schtasks",
            "/Create",
            "/TN",
            task_name,
            "/TR",
            tr,
            "/SC",
            "ONLOGON",
            "/RL",
            "LIMITED",
            "/F",
        ],
        check=False,
        creationflags=subprocess.CREATE_NO_WINDOW if hasattr(subprocess, "CREATE_NO_WINDOW") else 0,
    )


def _register_linux(exe: str, args: list[str]) -> None:
    autostart_dir = Path.home() / ".config" / "autostart"
    autostart_dir.mkdir(parents=True, exist_ok=True)
    desktop = autostart_dir / "cloudrestoreas.desktop"
    if desktop.exists():
        return
    exec_line = " ".join([exe, *args])
    content = f"""[Desktop Entry]
Type=Application
Name=CloudRestoreAS
Comment=Restauración automática SQL Server
Exec={exec_line}
Path={APP_DIR}
Terminal=false
X-GNOME-Autostart-enabled=true
"""
    desktop.write_text(content, encoding="utf-8")


def register_autostart_if_requested() -> None:
    load_env_file()
    if not _env_bool("CLOUDRESTORE_REGISTER_AUTOSTART", True):
        return
    if _marker_path().exists():
        return

    exe, args = _executable_command()
    try:
        if IS_WINDOWS:
            _register_windows(exe, args)
        else:
            _register_linux(exe, args)
        _marker_path().write_text("ok", encoding="utf-8")
    except OSError:
        pass