// Copyright (c) 2025 shibedrill
// SPDX-License-Identifier: GPL-3.0-or-later

use fdt::*;
use lazy_static::lazy_static;
use limine::response::{DeviceTreeBlobResponse, RsdpResponse};

use crate::boot::{DTB_REQUEST, RSDP_REQUEST};
use crate::log::{LOGGER, LogLevel};
use crate::{format, log_info, log_trace, log_warning};

lazy_static! {
    pub static ref DTB: Option<&'static DeviceTreeBlobResponse> = match DTB_REQUEST.get_response() {
        Some(resp) => {
            log_info!("Device: Got DTB pointer");
            Some(resp)
        }
        None => {
            log_warning!("Device: Did not get DTB pointer");
            None
        }
    };
    pub static ref RSDP: Option<&'static RsdpResponse> = match RSDP_REQUEST.get_response() {
        Some(resp) => {
            log_info!("Device: Got RSDP pointer");
            Some(resp)
        }
        None => {
            log_warning!("Device: Did not get RSDP pointer, ACPI unavailable");
            None
        }
    };
}

// Just to check
pub fn init_statics() {
    let _ = DTB.is_some();
    let _ = RSDP.is_some();
}

#[allow(dead_code)]
pub fn device_tree_parsed() -> Option<Fdt<'static>> {
    if let Some(ok_dtb) = *DTB
        && let Ok(ok_parsed_dt) = unsafe { fdt::Fdt::from_ptr(ok_dtb.dtb_ptr() as *const u8) }
    {
        log_trace!("Device: Parsed device tree");
        Some(ok_parsed_dt)
    } else {
        None
    }
}