use num_derive::FromPrimitive;
use num_traits::FromPrimitive;

use crate::arch;
#[repr(u32)]
#[derive(FromPrimitive, Debug)]
pub enum Syscall {
    /// Kill the calling process, and deallocate all
    /// resources associated, including shared memory channels,
    /// IPC sessions, handles, etc.
    /// Arguments:
    ///     0 - Exit code
    Exit = 0,
    /// Get the current PID of the calling process.
    Pid = 1,
    /// Send a message to another process.
    Message = 2,
    MemMap = 3,
    MemUnmap = 4,
    Resolve = 5,
    Spawn = 6,
    Version = 7,
    Yield = 8,
}

#[repr(u32)]
#[derive(FromPrimitive, Debug)]
pub enum SyscallStatus {
    /// Syscall completed without any issues.
    Success,
    /// Issued a system call with the wrong call ID.
    NoSuchCall,
    NoSuchProcess,
    NoSuchService,
    SecurityFailure,
    OutOfMemory,
    Aborted,
    Unspecified,
    Unknown,
    Unimplemented,
    InvalidPage,
}

impl From<u64> for SyscallStatus {
    fn from(value: u64) -> Self {
        SyscallStatus::from_u64(value).unwrap_or(Self::Unknown)
    }
}

pub fn exit(code: u32) -> ! {
    arch::syscall_impl::caller_syscall_1(Syscall::Exit as u64, code as u64);
    unreachable!();
}