use crate::cap::boot_untyped;
use crate::proc::context::CpuContext;

use super::{SyscallResult, try_syscall};

pub fn sys_boot_untyped_info(ctx: &mut CpuContext) {
    let pid = crate::arch::syscall::current_pid();
    if pid != crate::types::Pid::INIT {
        ctx.rax = SyscallResult::error(crate::error::KernelError::PermissionDenied).raw();
        return;
    }

    let index = ctx.rdi;

    let meta = try_syscall!(
        ctx,
        boot_untyped::metadata().ok_or(crate::error::KernelError::NotInitialized)
    );

    if index == u64::MAX {
        ctx.rax = SyscallResult::success(meta.len() as u64).raw();
        return;
    }

    let idx = try_syscall!(ctx, super::u32_from_reg(index)) as usize;
    if idx >= meta.len() {
        ctx.rax = SyscallResult::error(crate::error::KernelError::InvalidParameter).raw();
        return;
    }

    let info = &meta.as_slice()[idx];
    ctx.rax = SyscallResult::success(info.cnode_slot).raw();
    ctx.rsi = info.phys_base;
    ctx.rdx = (info.size_bits as u64) | ((info.is_device as u64) << 8);
}