//! Installs language servers (non-interactive, via package managers or
//! direct download).

/// Install a language server for the given language.
///
/// Returns a success message or an error describing why installation failed.
pub fn install_language_server(language: &str) -> anyhow::Result<String> {
    match language {
        "rust" => {
            // rust-analyzer is typically installed via rustup
            let output = std::process::Command::new("rustup")
                .args(["component", "add", "rust-analyzer"])
                .output()?;
            if output.status.success() {
                Ok("rust-analyzer installed via rustup".to_string())
            } else {
                anyhow::bail!("failed to install rust-analyzer: {}", String::from_utf8_lossy(&output.stderr))
            }
        }
        "python" => {
            let output = std::process::Command::new("npm")
                .args(["install", "-g", "pyright"])
                .output()?;
            if output.status.success() {
                Ok("pyright installed via npm".to_string())
            } else {
                anyhow::bail!("failed to install pyright: {}", String::from_utf8_lossy(&output.stderr))
            }
        }
        lang => anyhow::bail!("no install method known for language '{lang}'"),
    }
}