burn-onnx 0.21.0-pre.3

use super::prelude::*;

impl NodeCodegen for onnx_ir::max_pool1d::MaxPool1dNode {
    fn inputs(&self) -> &[Argument] {
        &self.inputs
    }

    fn outputs(&self) -> &[Argument] {
        &self.outputs
    }

    fn field(&self) -> Option<Field> {
        let name = Ident::new(&self.name, Span::call_site());
        let kernel_size = self.config.kernel_size.to_tokens();
        let strides = self.config.stride.to_tokens();
        let dilation = self.config.dilation.to_tokens();
        let ceil_mode = self.config.ceil_mode;

        let shape = self.inputs[0].ty.static_shape_known();
        let input_spatial = shape.as_deref().map(|s| &s[2..]);
        let padding = crate::burn::codegen::resolve_auto_pad_1d(
            &self.config.auto_pad,
            &self.config.padding,
            input_spatial,
            self.config.kernel_size,
            self.config.stride,
            self.config.dilation,
        )
        .to_tokens();

        Some(Field::new(
            self.name.clone(),
            quote! {
                MaxPool1d
            },
            quote! {
                let #name = MaxPool1dConfig::new(#kernel_size)
                    .with_stride(#strides)
                    .with_padding(#padding)
                    .with_dilation(#dilation)
                    .with_ceil_mode(#ceil_mode)
                    .init();
            },
        ))
    }

    fn forward(&self, scope: &mut ScopeAtPosition<'_>) -> TokenStream {
        let input = scope.arg(self.inputs.first().unwrap());
        let output = arg_to_ident(self.outputs.first().unwrap());
        let field = Ident::new(&self.name, Span::call_site());

        quote! {
            let #output = self.#field.forward(#input);
        }
    }

    fn register_imports(&self, imports: &mut BurnImports) {
        imports.register("burn::nn::pool::MaxPool1d");
        imports.register("burn::nn::pool::MaxPool1dConfig");
        imports.register("burn::nn::PaddingConfig1d");
    }
}

#[cfg(test)]
mod tests {
    use super::super::test_helpers::*;
    use burn::tensor::DType;
    use insta::assert_snapshot;
    use onnx_ir::max_pool1d::{MaxPool1dConfig, MaxPool1dNode, MaxPool1dNodeBuilder};
    use onnx_ir::padding::{AutoPad, PaddingConfig1d};

    fn create_max_pool1d_node(name: &str, ceil_mode: bool) -> MaxPool1dNode {
        let config =
            MaxPool1dConfig::new(3, 1, 1, PaddingConfig1d::Valid, ceil_mode, AutoPad::NotSet);

        MaxPool1dNodeBuilder::new(name)
            .input_tensor("input", 3, DType::F32)
            .output_tensor("output", 3, DType::F32)
            .config(config)
            .build()
    }

    fn create_max_pool1d_node_asymmetric(name: &str) -> MaxPool1dNode {
        // Asymmetric padding: left=1, right=2
        let config = MaxPool1dConfig::new(
            3,
            1,
            1,
            PaddingConfig1d::Explicit(1, 2),
            false,
            AutoPad::NotSet,
        );

        MaxPool1dNodeBuilder::new(name)
            .input_tensor("input", 3, DType::F32)
            .output_tensor("output", 3, DType::F32)
            .config(config)
            .build()
    }

    #[test]
    fn test_max_pool1d_forward() {
        let node = create_max_pool1d_node("pool1", false);
        let code = codegen_forward_default(&node);
        assert_snapshot!(code, @r"
        pub fn forward(&self, input: Tensor<B, 3>) -> Tensor<B, 3> {
            let output = self.pool1.forward(input);
            output
        }
        ");
    }

    #[test]
    fn test_max_pool1d_forward_with_clone() {
        let node = create_max_pool1d_node("pool1", false);
        let code = codegen_forward_with_clone(&node);
        assert_snapshot!(code, @r"
        pub fn forward(&self, input: Tensor<B, 3>) -> Tensor<B, 3> {
            let output = self.pool1.forward(input.clone());
            output
        }
        ");
    }

    #[test]
    fn test_max_pool1d_field_init_ceil_mode_false() {
        let node = create_max_pool1d_node("pool1", false);
        let code = codegen_field_init(&node);
        assert_snapshot!(code, @r#"
        let pool1 = MaxPool1dConfig::new(3)
            .with_stride(1)
            .with_padding(PaddingConfig1d::Valid)
            .with_dilation(1)
            .with_ceil_mode(false)
            .init();
        "#);
    }

    #[test]
    fn test_max_pool1d_field_init_ceil_mode_true() {
        let node = create_max_pool1d_node("pool1", true);
        let code = codegen_field_init(&node);
        assert_snapshot!(code, @r#"
        let pool1 = MaxPool1dConfig::new(3)
            .with_stride(1)
            .with_padding(PaddingConfig1d::Valid)
            .with_dilation(1)
            .with_ceil_mode(true)
            .init();
        "#);
    }

    #[test]
    fn test_max_pool1d_forward_asymmetric_padding() {
        let node = create_max_pool1d_node_asymmetric("pool1");
        let code = codegen_forward_default(&node);
        // Asymmetric padding is now handled by the burn-nn module
        assert_snapshot!(code, @r"
        pub fn forward(&self, input: Tensor<B, 3>) -> Tensor<B, 3> {
            let output = self.pool1.forward(input);
            output
        }
        ");
    }

    #[test]
    fn test_max_pool1d_field_init_auto_pad_same_upper() {
        let config =
            MaxPool1dConfig::new(3, 1, 1, PaddingConfig1d::Valid, false, AutoPad::SameUpper);
        let node = MaxPool1dNodeBuilder::new("pool1")
            .input_tensor_shape("input", vec![1, 3, 7], DType::F32)
            .output_tensor("output", 3, DType::F32)
            .config(config)
            .build();
        let code = codegen_field_init(&node);
        assert_snapshot!(code, @r#"
        let pool1 = MaxPool1dConfig::new(3)
            .with_stride(1)
            .with_padding(PaddingConfig1d::Explicit(1, 1))
            .with_dilation(1)
            .with_ceil_mode(false)
            .init();
        "#);
    }

    #[test]
    fn test_max_pool1d_field_init_asymmetric_padding() {
        let node = create_max_pool1d_node_asymmetric("pool1");
        let code = codegen_field_init(&node);
        // Asymmetric padding is passed directly to the module
        assert_snapshot!(code, @r"
        let pool1 = MaxPool1dConfig::new(3)
            .with_stride(1)
            .with_padding(PaddingConfig1d::Explicit(1, 2))
            .with_dilation(1)
            .with_ceil_mode(false)
            .init();
        ");
    }
}