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pub mod mat_mul;

pub use self::mat_mul::MatMul;
use crate::internal::*;
use num_traits::{Float, Zero};

use super::binary::*;

bin_to_super_type!(add, Add, flip:commute,
     [f32, i8, i16, i32, i64, u8, u16, f16, f64, TDim] => |c, a, b| *c = a.clone() + b);
bin_to_super_type!(sub, Sub, flip:flip_sub,
     [f32, i8, i16, i32, i64, u8, u16, f16, f64, TDim] => |c, a, b| *c = a.clone() - b);
#[inline]
bin_to_super_type!(mul, Mul,
        cost: |dt| tvec!((Cost::FMA(dt), 1)),
        flip:commute,
     [f32, i8, i16, i32, i64, u8, u16, f16, f64, TDim] => |c, a, b| *c = a.clone() * b);
bin_to_super_type!(div, Div,
        cost: |dt| tvec!((Cost::Div(dt), 1)),
     [f32, i8, i16, i32, i64, u8, u16, f16, f64, TDim] => |c, a, b| *c = a.clone() / b);
bin_to_super_type!(rem, Rem,
     [f32, i8, i16, i32, i64, u8, u16, f16, f64, TDim] => |c, a, b| *c = a.clone() % b);
bin_to_super_type!(min, Min, flip:commute,
     [f32, f64] => |c,a,b| *c = a.min(*b),
     [i8, i16, i32, i64, u8, u16] => |c, a, b| *c = *a.min(b));
bin_to_super_type!(max, Max, flip:commute,
     [f32, f64] => |c,a,b| *c = a.max(*b),
     [i8, i16, i32, i64, u8, u16] => |c, a, b| *c = *a.max(b));
bin_to_super_type!(pow, Pow,
     [f32, f64] => |c,a,b| *c = a.powf(*b));

fn flip_sub(_op: &dyn BinMiniOp, t: &Arc<Tensor>) -> Option<UnaryOp> {
    let mut t = t.clone().into_tensor();
    fn negate<T: Datum + std::ops::Neg<Output = T>>(t: &mut Tensor) {
        t.as_slice_mut::<T>().unwrap().iter_mut().for_each(|p| *p = -p.clone());
    }
    (|t: &mut Tensor| -> TractResult<()> {
        dispatch_signed!(negate(t.datum_type())(t));
        Ok(())
    })(&mut t)
    .unwrap();
    Some(UnaryOp::new(Box::new(Add), Arc::new(t)))
}

element_wise!(abs, Abs, [f16, f32, i32] => |_, xs| xs.iter_mut().for_each(|x| *x = x.abs()));
element_wise!(exp, Exp, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.exp()));
element_wise!(ln, Ln, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.ln()));
element_wise!(sqrt, Sqrt, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.sqrt()));
element_wise!(recip, Recip, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.recip()));
element_wise!(rsqrt, Rsqrt, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.sqrt().recip()));

element_wise!(ceil, Ceil, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.ceil()));
element_wise!(floor, Floor, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.floor()));

element_wise!(scalar_min_max, ScalarMinMax { min: f32, max: f32 },
   [f32, f64] => |m, xs| xs.iter_mut().for_each(|x| *x = x.max(m.max as _).min(m.min as _))
);

element_wise!(scalar_min, ScalarMin { min: f32 },
   [f32, f64] => |m, xs| xs.iter_mut().for_each(|x| *x = x.min(m.min as _))
);

element_wise!(scalar_max, ScalarMax { max: f32 },
   [f32, f64] => |m, xs| xs.iter_mut().for_each(|x| *x = x.max(m.max as _))
);

element_wise!(cos, Cos, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.cos()));
element_wise!(sin, Sin, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.sin()));
element_wise!(tan, Tan, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.tan()));
element_wise!(acos, Acos, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.acos()));
element_wise!(asin, Asin, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.asin()));
element_wise!(atan, Atan, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.atan()));

element_wise!(cosh, Cosh, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.cosh()));
element_wise!(sinh, Sinh, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.sinh()));
element_wise!(tanh, Tanh,
   [f32] => |_, xs| <f32 as FloatLike>::tanh().run(xs),
   [f16, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.tanh());
   cost: |dt| {tvec!((Cost::FMA(dt), 11), (Cost::Div(dt), 1))}
);
element_wise!(acosh, Acosh, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.acosh()));
element_wise!(asinh, Asinh, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.asinh()));
element_wise!(atanh, Atanh, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = x.atanh()));

element_wise!(neg, Neg, [i8, i16, i32, i64, f16, f32, f64, TDim] => |_, xs| xs.iter_mut().for_each(|x| *x = -x.clone()));

element_wise!(sign, Sign, [f16, f32, f64] => |_, xs| xs.iter_mut().for_each(|x| *x = if x.is_zero() { *x } else { x.signum() }));

#[cfg(test)]
mod tests {
    use ndarray::arr2;
    #[test]
    fn mul() {
        let a = arr2(&[[1., 2.], [3., 4.]]);
        let b = arr2(&[[1., 0.], [0., 0.]]);
        assert_eq!(a * b, arr2(&[[1., 0.], [0., 0.]]));
    }
    #[test]
    fn dot() {
        let a = arr2(&[[1., 2.], [3., 4.]]);
        let b = arr2(&[[1., 0.], [0., 0.]]);
        assert_eq!(a.dot(&b), arr2(&[[1., 0.], [3., 0.]]));
    }
}