use paste::paste;
use std::sync::OnceLock;

use super::DataLoadError;

macro_rules! template_tables {
    ($($template_type:ident;)*) => {
        $(paste! {
            mod [<$template_type:snake>];
            pub use [<$template_type:snake>]::$template_type;
        })*

        $(paste! {
            static [<$template_type:snake:upper _TB>]: OnceLock<Vec<$template_type>> = OnceLock::new();
        })*

        pub(crate) fn load_tables(filecfg_path: &str) -> Result<(), DataLoadError> {
            $(paste! {
                let file_name = concat!(stringify!($template_type), "Tb.json");
                let path = format!("{filecfg_path}/{file_name}");

                let data = std::fs::read_to_string(path)?;
                [<$template_type:snake:upper _TB>].set(serde_json::from_str(&data).map_err(|err| DataLoadError::FromJsonError(String::from(stringify!($template_type)), err))?).unwrap();
            })*

            Ok(())
        }

        $(paste! {
            pub mod [<$template_type:snake _tb>] {
                pub fn iter() -> ::std::slice::Iter<'static, super::$template_type> {
                    super::[<$template_type:snake:upper _TB>].get().unwrap().iter()
                }
            }
        })*
    };
}

template_tables! {
    AvatarBaseTemplate;
    UnlockConfigTemplate;
    SectionConfigTemplate;
    ProcedureConfigTemplate;
    PostGirlConfigTemplate;
    TrainingQuestTemplate;
    WeaponTemplate;
}