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/*
 * Copyright 2020 Fluence Labs Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#[macro_export]
/// Crates new syn::Ident with the given string and new call span
macro_rules! new_ident {
    ($string: expr) => {
        syn::Ident::new(&$string, proc_macro2::Span::call_site());
    };
}

#[macro_export]
macro_rules! prepare_global_data {
    ($mtype: ident, $self: ident, $name: expr, $data: ident, $data_size: ident, $global_static_name: ident, $section_name: ident) => {
        // TODO: change serialization protocol
        let mtype = crate::export_ast_types::SDKAst::$mtype($self.clone().into());
        let $data = serde_json::to_vec(&mtype).unwrap();
        let $data_size = $data.len();
        let $data = syn::LitByteStr::new(&$data, proc_macro2::Span::call_site());

        let $global_static_name = crate::new_ident!(format!(
            "{}{}",
            crate::token_stream_generator::GENERATED_GLOBAL_PREFIX,
            $name.replace(".", "_"),
        ));
        let $section_name = format!(
            "{}{}",
            crate::token_stream_generator::GENERATED_SECTION_PREFIX,
            $name.replace(".", "_"),
        );
    };
}

#[macro_export]
macro_rules! syn_error {
    ($span:expr, $message:expr) => {
        Err(syn::Error::new($span, $message))
    };
}

/// Calculate record size in an internal serialized view.
pub fn get_record_size<'a>(
    fields: impl Iterator<Item = &'a crate::parsed_type::ParsedType>,
) -> usize {
    use crate::parsed_type::ParsedType;

    let mut size = 0;

    for field in fields {
        size += match field {
            ParsedType::U8(_) | ParsedType::I8(_) | ParsedType::Boolean(_) => 1,
            ParsedType::U16(_) | ParsedType::I16(_) => 2,
            ParsedType::U32(_) | ParsedType::I32(_) | ParsedType::F32(_) => 4,
            ParsedType::U64(_) | ParsedType::I64(_) | ParsedType::F64(_) => 8,
            ParsedType::Record(..) => 4,
            ParsedType::Vector(..) | ParsedType::Utf8Str(_) | ParsedType::Utf8String(_) => 2 * 4,
        };
    }

    size
}

pub(crate) fn prepare_ident(str: String) -> String {
    str.chars()
        .map(|c| match c {
            '<' => '_',
            '&' => '_',
            '>' => '_',
            c => c,
        })
        .collect()
}