//! Source info.

use std::{path::PathBuf, sync::Arc};

/// Source context.
#[derive(Clone, Debug, Default)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct SourceInfo {
    /// The name of the source.
    pub source: String,
    /// Optionally indicates a starting location after the beginning of the source.
    /// If `None`, the start is the beginning of the source.
    pub start: Option<Arc<crate::SourcePosition>>,
}

impl From<&str> for SourceInfo {
    fn from(source: &str) -> Self {
        Self {
            source: source.to_owned(),
            start: None,
        }
    }
}

impl From<PathBuf> for SourceInfo {
    fn from(path: PathBuf) -> Self {
        Self {
            source: path.to_string_lossy().to_string(),
            start: None,
        }
    }
}

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

        if let Some(pos) = &self.start {
            write!(f, ":{},{}", pos.line, pos.column)?;
        }

        Ok(())
    }
}