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use crate::compiler::message::Message;

use crate::compiler::util::types::TypePathMap;

use crate::gen::base::map::{DefaultTypeMapper, TypePathMapper};

use crate::gen::base::message::Templates;

use crate::gen::base::message_write::generate;

use crate::gen::base::Error;

use crate::gen::rust::util::{gen_where_clause, Lifetime, RustUtils};

use crate::gen::template::Template;

use crate::gen::{codec::CodecMap, RustParams};

use itertools::Itertools;

const TEMPLATE: &[u8] = include_bytes!("write.template");

fn _gen_message_write_impl(

    msg: &Message,

    codec_map: &CodecMap,

    type_path_map: &TypePathMapper<DefaultTypeMapper>,

    generics: &str,

    impl_generics: &str,

    function: &str,

) -> Result<String, Error> {

    let mut templates = Templates {

        template: Template::compile(TEMPLATE).unwrap(),

        codec_map,

    };

    let where_clauses = msg

        .fields

        .iter()

        .map(|field| gen_where_clause(&templates.template, field, type_path_map, function))

        .join("");

    templates.template.var("where_clauses", where_clauses);

    if generics.is_empty() {

  Branch (60:8): [True: 35, False: 10]

  Branch (60:8): [Folded - Ignored]

        templates.template.var("impl_generics", "").var("generics", "<'_>");

    } else {

        templates.template.var("generics", generics).var("impl_generics", impl_generics);

    }

    generate::<RustUtils, _>(templates, msg, type_path_map, function)

}

pub fn gen_message_write_impl(

    msg: &Message,

    codec_map: &CodecMap,

    type_path_map: &TypePathMap,

    params: &RustParams,

) -> Result<String, Error> {

    let type_path_map = TypePathMapper::new(type_path_map, DefaultTypeMapper);

    let generics = RustUtils::get_generics_for_write(msg, &type_path_map, Lifetime::Named).into_string();

    let mut code = _gen_message_write_impl(msg, codec_map, &type_path_map, &generics, &generics, "impl")
?0
;

    if 
msg.fields.iter().any(31
|v| v.header.is_some()
)31
 {

  Branch (77:8): [True: 6, False: 25]

  Branch (77:8): [Folded - Ignored]

        let shape_generics = RustUtils::get_generics_for_write(msg, &type_path_map, Lifetime::Anonymous).into_string();

        let impl_shape_generics = RustUtils::get_generics_for_write(msg, &type_path_map, Lifetime::None).into_string();

        code += &_gen_message_write_impl(msg, codec_map, &type_path_map, &shape_generics, &impl_shape_generics, "impl_shape_write")
?0
;

    }

    if params.enable_write_async {

  Branch (82:8): [True: 6, False: 25]

  Branch (82:8): [Folded - Ignored]

        code += &_gen_message_write_impl(msg, codec_map, &type_path_map, &generics, &generics, "impl_async")
?0
;

        if 
msg.fields.iter().any(6
|v| v.header.is_some()
)6
 {

  Branch (84:12): [True: 2, False: 4]

  Branch (84:12): [Folded - Ignored]

            code += &_gen_message_write_impl(msg, codec_map, &type_path_map, &generics, &generics, "impl_shape_write_async")
?0
;

        }

    }

    Ok(code)

}