import t, c
from . import syscall as syscall

def exit(code: t.CInt) -> t.CVoid:
    syscall._syscall1(t.CUInt64T(syscall.EXIT), t.CUInt64T(code))

def yield_cpu() -> t.CVoid:
    syscall._syscall2(t.CUInt64T(syscall.WAIT_WINDOW), t.CUInt64T(0), t.CUInt64T(2))

def spawn(path: t.CConst | t.CChar | t.CPtr, blocking: t.CInt = 0) -> t.CInt:
    return t.CInt(syscall._syscall2(t.CUInt64T(syscall.SPAWN), t.CUInt64T(path), t.CUInt64T(blocking)))

def thread_create(func: t.CVoid | t.CPtr, arg: t.CVoid | t.CPtr = None) -> t.CInt:
    return t.CInt(syscall._syscall2(t.CUInt64T(syscall.THREAD_CREATE), t.CUInt64T(func), t.CUInt64T(arg)))

@t.Object
class Thread:
    _tid: t.CInt
    _func: t.CVoid | t.CPtr
    _arg: t.CVoid | t.CPtr
    _running: t.CInt

    def __init__(self, func: t.CVoid | t.CPtr, arg: t.CVoid | t.CPtr = None):
        self._func = func
        self._arg = arg
        self._tid = -1
        self._running = 0

    def start(self) -> t.CInt:
        if self._running: return -1
        self._tid = thread_create(self._func, self._arg)
        if self._tid < 0: return -1
        self._running = 1
        return 0

    def is_alive(self) -> t.CInt:
        return self._running

    def get_tid(self) -> t.CInt:
        return self._tid

@t.Object
class Process:
    _pid: t.CInt
    _path: t.CArray[t.CChar, 128]

    def __init__(self, path: t.CConst | t.CChar | t.CPtr):
        self._pid = -1
        i: t.CInt = 0
        for ch in path:
            if i >= 127: break
            self._path[i] = ch
            i += 1
        self._path[i] = 0

    def start(self) -> t.CInt:
        self._pid = spawn(c.Addr(self._path[0]), 0)
        return self._pid

    def start_blocking(self) -> t.CInt:
        self._pid = spawn(c.Addr(self._path[0]), 1)
        return self._pid

    def get_pid(self) -> t.CInt:
        return self._pid