//! LSP diagnostic utility types.
use std::fmt;

use serde::{Deserialize, Serialize};

/// Describes the severity level of a [`Diagnostic`].
#[derive(Debug, Clone, Copy, Eq, PartialEq, PartialOrd, Ord, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum Severity {
    Hint,
    Info,
    Warning,
    Error,
}

impl Default for Severity {
    fn default() -> Self {
        Self::Hint
    }
}

// while I would prefer having this in helix-lsp that necessitates a bunch of
// conversions I would rather not add. I think its fine since this just a very
// trivial newtype wrapper and we would need something similar once we define
// completions in core
slotmap::new_key_type! {
    pub struct LanguageServerId;
}

impl fmt::Display for LanguageServerId {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{:?}", self.0)
    }
}