//! Access the native system.
use crate::command::{self, Command};
pub use iced_native::system::*;

use iced_graphics::window;

/// Query for available system information.
///
/// Returns `None` if not using the `sysinfo` feature flag.
pub fn information<Message>(
    f: impl Fn(Option<Information>) -> Message + 'static,
) -> Command<Message> {
    Command::single(command::Action::System(Action::QueryInformation(
        Box::new(f),
    )))
}

#[cfg(feature = "sysinfo")]
pub(crate) fn get_information(
    graphics_info: &window::GraphicsInformation,
) -> Option<Information> {
    use sysinfo::{ProcessExt, ProcessorExt, System, SystemExt};
    let mut system = System::new_all();
    system.refresh_all();

    let cpu = system.global_processor_info();

    let memory_used = sysinfo::get_current_pid()
        .and_then(|pid| system.process(pid).ok_or("Process not found"))
        .and_then(|process| Ok(process.memory()))
        .ok();

    let information = Information {
        system_name: system.name(),
        system_kernel: system.kernel_version(),
        system_version: system.long_os_version(),
        cpu_brand: cpu.brand().into(),
        cpu_cores: system.physical_core_count(),
        memory_total: system.total_memory(),
        memory_used,
        graphics_adapter: graphics_info.adapter.clone(),
        graphics_backend: graphics_info.backend.clone(),
    };

    Some(information)
}

#[cfg(not(feature = "sysinfo"))]
pub(crate) fn get_information(
    _graphics_info: &window::GraphicsInformation,
) -> Option<Information> {
    None
}