# Copyright (C) 2022-2025 Exaloop Inc. <https://exaloop.io>

import operator
import util

from .ndarray import ndarray
from .routines import asarray

@tuple
class _OpWrap:
    op: F
    F: type

    def __call__(self, a, b):
        A = type(a)
        B = type(b)
        c1, c2 = util.op_types(A, B)
        C1 = type(c1)
        C2 = type(c2)
        return self.op(util.cast(a, C1), util.cast(b, C2))

def _fix_scalar(x, A: type):
    X = type(x)

    a_is_int: Static[int] = (A is int or A is byte or isinstance(A, Int)
                             or isinstance(A, UInt))
    x_is_int: Static[int] = X is int

    a_is_float: Static[int] = (A is float or A is float32 or A is float16
                               or A is bfloat16 or A is float128)
    x_is_float: Static[int] = X is float

    a_is_complex: Static[int] = (A is complex or A is complex64)
    x_is_complex: Static[int] = X is complex

    should_cast: Static[int] = ((x_is_int and
                                 (a_is_int or a_is_float or a_is_complex)) or
                                (x_is_float and (a_is_float or a_is_complex))
                                or (x_is_complex and a_is_complex))

    if (A is float16 or A is float32) and X is complex:
        return util.cast(x, complex64)
    elif should_cast:
        return util.cast(x, A)
    else:
        return x

@inline
def _binop_impl(arr: ndarray, other, op):
    op = _OpWrap(op)

    if isinstance(other, ndarray):
        return arr._op_elemwise(other, op)

    if  (isinstance(other, bool) or isinstance(other, int) or
         isinstance(other, float) or isinstance(other, complex)):
        return arr._op_scalar(_fix_scalar(other, arr.dtype), op)

    return arr._op_elemwise(asarray(other), op)

@inline
def _ibinop_impl(arr: ndarray, other, op):
    op = _OpWrap(op)

    if isinstance(other, ndarray):
        return arr._iop_elemwise(other, op)

    if  (isinstance(other, bool) or isinstance(other, int) or
         isinstance(other, float) or isinstance(other, complex)):
        return arr._iop_scalar(_fix_scalar(other, arr.dtype), op)

    return arr._iop_elemwise(asarray(other), op)

@inline
def _rbinop_impl(arr: ndarray, other, op):
    op = _OpWrap(op)

    if isinstance(other, ndarray):
        return arr._rop_elemwise(other, op)

    if  (isinstance(other, bool) or isinstance(other, int) or
         isinstance(other, float) or isinstance(other, complex)):
        return arr._rop_scalar(_fix_scalar(other, arr.dtype), op)

    return arr._rop_elemwise(asarray(other), op)

def _floor_divide(x, y):
    X = type(x)
    Y = type(y)
    if isinstance(X, Int) and isinstance(Y, Int):
        return util.pydiv(x, y)
    else:
        return x // y

def _remainder(x, y):
    X = type(x)
    Y = type(y)
    if isinstance(X, Int) and isinstance(Y, Int):
        return util.pymod(x, y)
    elif ((X is float and Y is float) or
          (X is float32 and Y is float32) or
          (X is float16 and Y is float16)):
        return util.pyfmod(x, y)
    else:
        return x % y

@extend
class ndarray:

    @inline
    def __add__(self, other):
        return _binop_impl(self, other, operator.add)

    @inline
    def __radd__(self, other):
        return _rbinop_impl(self, other, operator.add)

    @inline
    def __iadd__(self, other):
        return _ibinop_impl(self, other, operator.add)

    @inline
    def __sub__(self, other):
        return _binop_impl(self, other, operator.sub)

    @inline
    def __rsub__(self, other):
        return _rbinop_impl(self, other, operator.sub)

    @inline
    def __isub__(self, other):
        return _ibinop_impl(self, other, operator.sub)

    @inline
    def __mul__(self, other):
        return _binop_impl(self, other, operator.mul)

    @inline
    def __rmul__(self, other):
        return _rbinop_impl(self, other, operator.mul)

    @inline
    def __imul__(self, other):
        return _ibinop_impl(self, other, operator.mul)

    @inline
    def __mod__(self, other):
        return _binop_impl(self, other, _remainder)

    @inline
    def __rmod__(self, other):
        return _rbinop_impl(self, other, _remainder)

    @inline
    def __imod__(self, other):
        return _ibinop_impl(self, other, _remainder)

    @inline
    def __pow__(self, other):
        return _binop_impl(self, other, operator.pow)

    @inline
    def __rpow__(self, other):
        return _rbinop_impl(self, other, operator.pow)

    @inline
    def __ipow__(self, other):
        return _ibinop_impl(self, other, operator.pow)

    @inline
    def __truediv__(self, other):
        return _binop_impl(self, other, operator.truediv)

    @inline
    def __rtruediv__(self, other):
        return _rbinop_impl(self, other, operator.truediv)

    @inline
    def __itruediv__(self, other):
        return _ibinop_impl(self, other, operator.truediv)

    @inline
    def __floordiv__(self, other):
        return _binop_impl(self, other, _floor_divide)

    @inline
    def __rfloordiv__(self, other):
        return _rbinop_impl(self, other, _floor_divide)

    @inline
    def __ifloordiv__(self, other):
        return _ibinop_impl(self, other, _floor_divide)

    @inline
    def __lshift__(self, other):
        return _binop_impl(self, other, operator.lshift)

    @inline
    def __rlshift__(self, other):
        return _rbinop_impl(self, other, operator.lshift)

    @inline
    def __ilshift__(self, other):
        return _ibinop_impl(self, other, operator.lshift)

    @inline
    def __rshift__(self, other):
        return _binop_impl(self, other, operator.rshift)

    @inline
    def __rrshift__(self, other):
        return _rbinop_impl(self, other, operator.rshift)

    @inline
    def __irshift__(self, other):
        return _ibinop_impl(self, other, operator.rshift)

    @inline
    def __and__(self, other):
        return _binop_impl(self, other, operator.and_)

    @inline
    def __rand__(self, other):
        return _rbinop_impl(self, other, operator.and_)

    @inline
    def __iand__(self, other):
        return _ibinop_impl(self, other, operator.and_)

    @inline
    def __or__(self, other):
        return _binop_impl(self, other, operator.or_)

    @inline
    def __ror__(self, other):
        return _rbinop_impl(self, other, operator.or_)

    @inline
    def __ior__(self, other):
        return _ibinop_impl(self, other, operator.or_)

    @inline
    def __xor__(self, other):
        return _binop_impl(self, other, operator.xor)

    @inline
    def __rxor__(self, other):
        return _rbinop_impl(self, other, operator.xor)

    @inline
    def __ixor__(self, other):
        return _ibinop_impl(self, other, operator.xor)

    @inline
    def __pos__(self):
        return self._op_unary(operator.pos)

    @inline
    def __neg__(self):
        return self._op_unary(operator.neg)

    @inline
    def __invert__(self):
        return self._op_unary(operator.invert)

    @inline
    def __abs__(self):
        return self._op_unary(operator.abs)

    @inline
    def __eq__(self, other):
        return _binop_impl(self, other, operator.eq)

    @inline
    def __ne__(self, other):
        return _binop_impl(self, other, operator.ne)

    @inline
    def __lt__(self, other):
        return _binop_impl(self, other, operator.lt)

    @inline
    def __le__(self, other):
        return _binop_impl(self, other, operator.le)

    @inline
    def __gt__(self, other):
        return _binop_impl(self, other, operator.gt)

    @inline
    def __ge__(self, other):
        return _binop_impl(self, other, operator.ge)