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use crate::BunLanguage;
use proto_core::{async_trait, get_home_dir, Describable, Executable, Installable, ProtoError};
use std::path::{Path, PathBuf};

#[cfg(target_os = "windows")]
pub fn get_bin_name<T: AsRef<str>>(name: T) -> String {
    format!("{}.exe", name.as_ref())
}

#[cfg(not(target_os = "windows"))]
pub fn get_bin_name<T: AsRef<str>>(name: T) -> String {
    name.as_ref().to_string()
}

#[async_trait]
impl Executable<'_> for BunLanguage {
    async fn find_bin_path(&mut self) -> Result<(), ProtoError> {
        let bin_path = self
            .get_install_dir()?
            .join(get_bin_name(self.get_bin_name()));

        if bin_path.exists() {
            self.bin_path = Some(bin_path);
        } else {
            return Err(ProtoError::ExecuteMissingBin(self.get_name(), bin_path));
        }

        Ok(())
    }

    fn get_bin_path(&self) -> Result<&Path, ProtoError> {
        match self.bin_path.as_ref() {
            Some(bin) => Ok(bin),
            None => Err(ProtoError::MissingTool(self.get_name())),
        }
    }

    fn get_globals_bin_dir(&self) -> Result<PathBuf, ProtoError> {
        Ok(get_home_dir()?.join(".bun").join("bin"))
    }
}