// Implementations Linux (logind, sudoers, gnome busctl, x11 xset).
use anyhow::{bail, Context, Result};
use std::process::Command;

use crate::commands::{CommandAction, CommandValue};

// Execute une commande d'alimentation selon le backend choisi.
pub fn execute_power(backend: &str, action: CommandAction) -> Result<()> {
    match backend {
        "linux_logind_polkit" => match action {
            CommandAction::Shutdown => run("systemctl", &["poweroff"]),
            CommandAction::Reboot => run("systemctl", &["reboot"]),
            CommandAction::Sleep => run("systemctl", &["suspend"]),
            CommandAction::Screen => bail!("screen action not supported in power backend"),
        },
        "linux_sudoers" => match action {
            CommandAction::Shutdown => run("shutdown", &["-h", "now"]),
            CommandAction::Reboot => run("reboot", &[]),
            CommandAction::Sleep => run("systemctl", &["suspend"]),
            CommandAction::Screen => bail!("screen action not supported in power backend"),
        },
        _ => bail!("unknown linux power backend"),
    }
}

// Execute une commande d'ecran selon le backend choisi.
pub fn execute_screen(backend: &str, value: CommandValue) -> Result<()> {
    match backend {
        "gnome_busctl" => match value {
            CommandValue::Off => run(
                "busctl",
                &[
                    "--user",
                    "set-property",
                    "org.gnome.Mutter.DisplayConfig",
                    "/org/gnome/Mutter/DisplayConfig",
                    "org.gnome.Mutter.DisplayConfig",
                    "PowerSaveMode",
                    "i",
                    "1",
                ],
            ),
            CommandValue::On => run(
                "busctl",
                &[
                    "--user",
                    "set-property",
                    "org.gnome.Mutter.DisplayConfig",
                    "/org/gnome/Mutter/DisplayConfig",
                    "org.gnome.Mutter.DisplayConfig",
                    "PowerSaveMode",
                    "i",
                    "0",
                ],
            ),
        },
        "x11_xset" => match value {
            CommandValue::Off => run("xset", &["dpms", "force", "off"]),
            CommandValue::On => run("xset", &["dpms", "force", "on"]),
        },
        _ => bail!("unknown linux screen backend"),
    }
}

fn run(cmd: &str, args: &[&str]) -> Result<()> {
    let status = Command::new(cmd)
        .args(args)
        .status()
        .with_context(|| format!("failed to run {cmd}"))?;
    if status.success() {
        Ok(())
    } else {
        bail!("command failed: {cmd}")
    }
}