#![feature(never_type)]
use std::{
    marker::PhantomData,
    sync::atomic::{AtomicBool, Ordering},
};

use kernel_arch_interface::{
    cpu::IpiQueue,
    mem::{
        DeviceMemoryAttributes, KernelTableManager, PhysicalMemoryAllocator, RawDeviceMemoryMapping,
    },
    task::{Scheduler, TaskContext},
    Architecture,
};
use libk_mm_interface::{
    address::PhysicalAddress,
    process::ProcessAddressSpaceManager,
    table::{MapAttributes, TableAllocator},
};
use yggdrasil_abi::{
    error::Error,
    process::{ProcessGroupId, Signal},
};

pub struct ArchitectureImpl;

#[derive(Debug)]
pub struct KernelTableManagerImpl;

pub struct ProcessAddressSpaceImpl<TA: TableAllocator>(!, PhantomData<TA>);

pub struct TaskContextImpl<K: KernelTableManager, PA: PhysicalMemoryAllocator>(
    !,
    PhantomData<(K, PA)>,
);

static DUMMY_INTERRUPT_MASK: AtomicBool = AtomicBool::new(true);

impl Architecture for ArchitectureImpl {
    type PerCpuData = ();

    fn local_cpu() -> *mut Self::PerCpuData {
        unimplemented!()
    }

    unsafe fn set_local_cpu(_cpu: *mut Self::PerCpuData) {
        unimplemented!()
    }

    unsafe fn init_local_cpu<S: Scheduler + 'static>(_id: Option<u32>, _data: Self::PerCpuData) {
        unimplemented!()
    }

    unsafe fn init_ipi_queues(_queues: Vec<IpiQueue<Self>>) {
        unimplemented!()
    }

    fn idle_task() -> extern "C" fn(usize) -> ! {
        unimplemented!()
    }

    fn cpu_count() -> usize {
        unimplemented!()
    }

    fn cpu_index<S: Scheduler + 'static>() -> u32 {
        unimplemented!()
    }

    unsafe fn set_interrupt_mask(mask: bool) -> bool {
        DUMMY_INTERRUPT_MASK.swap(mask, Ordering::Acquire)
    }

    fn interrupt_mask() -> bool {
        unimplemented!()
    }

    fn wait_for_interrupt() {
        unimplemented!()
    }
}

impl KernelTableManager for KernelTableManagerImpl {
    fn virtualize(_phys: u64) -> usize {
        unimplemented!()
    }

    fn physicalize(_virt: usize) -> u64 {
        unimplemented!()
    }

    unsafe fn map_device_pages(
        _base: u64,
        _count: usize,
        _attrs: DeviceMemoryAttributes,
    ) -> Result<RawDeviceMemoryMapping<Self>, Error> {
        unimplemented!()
    }

    unsafe fn unmap_device_pages(_mapping: &RawDeviceMemoryMapping<Self>) {
        unimplemented!()
    }
}

impl<TA: TableAllocator> ProcessAddressSpaceManager<TA> for ProcessAddressSpaceImpl<TA> {
    const LOWER_LIMIT_PFN: usize = 16;
    const UPPER_LIMIT_PFN: usize = 1024;

    fn new() -> Result<Self, Error> {
        unimplemented!()
    }

    unsafe fn clear(&mut self) {
        unimplemented!()
    }

    unsafe fn map_page(
        &mut self,
        _address: usize,
        _physical: PhysicalAddress,
        _flags: MapAttributes,
    ) -> Result<(), Error> {
        unimplemented!()
    }

    unsafe fn unmap_page(&mut self, _address: usize) -> Result<PhysicalAddress, Error> {
        unimplemented!()
    }

    fn translate(&self, _address: usize) -> Result<(PhysicalAddress, MapAttributes), Error> {
        unimplemented!()
    }

    fn as_address_with_asid(&self) -> u64 {
        unimplemented!()
    }
}

impl<K: KernelTableManager, PA: PhysicalMemoryAllocator> TaskContext<K, PA>
    for TaskContextImpl<K, PA>
{
    const USER_STACK_EXTRA_ALIGN: usize = 0;
    const SIGNAL_STACK_EXTRA_ALIGN: usize = 0;

    unsafe fn enter(&self) -> ! {
        unimplemented!()
    }

    unsafe fn switch(&self, _from: &Self) {
        unimplemented!()
    }

    unsafe fn switch_and_drop(&self, _thread: *const ()) {
        unimplemented!()
    }

    fn user(
        _entry: usize,
        _arg: usize,
        _cr3: u64,
        _user_stack_sp: usize,
        _tls_address: usize,
    ) -> Result<Self, Error> {
        unimplemented!()
    }

    fn kernel(_entry: extern "C" fn(usize) -> !, _arg: usize) -> Result<Self, Error> {
        unimplemented!()
    }

    fn kernel_closure<F: FnOnce() -> ! + Send + 'static>(_f: F) -> Result<Self, Error> {
        unimplemented!()
    }
}

#[no_mangle]
extern "Rust" fn __signal_process_group(_group_id: ProcessGroupId, _signal: Signal) {
    unimplemented!()
}