use proc_macro::TokenStream;
use proc_macro2::TokenStream as TokenStream2;
use quote::{format_ident, quote};
use syn::Ident;

use crate::InputInfo;

pub fn single_update(input: InputInfo) -> TokenStream {
    let generate_inputs: Vec<Vec<Ident>> = (input.start..=input.end)
        .map(|count| {
            (input.start..(input.start + count))
                .map(|i| format_ident!("t{}", i))
                .collect()
        })
        .collect();

    let invocations: Vec<TokenStream2> = generate_inputs
        .iter()
        .map(|t| {
            let macro_ident = &input.macro_ident;

            quote! {
                #macro_ident!(#(#t,)*);
            }
        })
        .collect();

    TokenStream::from(quote! {
        #(
            #invocations
        )*
    })
}