use crate::common::*;

/// A single line in a recipe body, consisting of any number of `Fragment`s.
#[derive(Debug, Clone, PartialEq, Serialize)]
#[serde(transparent)]
pub(crate) struct Line<'src> {
  pub(crate) fragments: Vec<Fragment<'src>>,
}

impl<'src> Line<'src> {
  pub(crate) fn is_empty(&self) -> bool {
    self.fragments.is_empty()
  }

  pub(crate) fn is_continuation(&self) -> bool {
    match self.fragments.last() {
      Some(Fragment::Text { token }) => token.lexeme().ends_with('\\'),
      _ => false,
    }
  }

  pub(crate) fn is_shebang(&self) -> bool {
    match self.fragments.first() {
      Some(Fragment::Text { token }) => token.lexeme().starts_with("#!"),
      _ => false,
    }
  }

  pub(crate) fn is_quiet(&self) -> bool {
    match self.fragments.first() {
      Some(Fragment::Text { token }) => {
        token.lexeme().starts_with('@') || token.lexeme().starts_with("-@")
      }
      _ => false,
    }
  }

  pub(crate) fn is_infallible(&self) -> bool {
    match self.fragments.first() {
      Some(Fragment::Text { token }) => {
        token.lexeme().starts_with('-') || token.lexeme().starts_with("@-")
      }
      _ => false,
    }
  }
}