use std::fmt::Display;

pub struct Match {
    pub file_name: String,
    pub line_number: usize,
    pub text: String,
}

pub struct Matches {
    pub items: Vec<Match>,
    pub pattern: String,
}

impl Matches {
    pub fn is_empty(&self) -> bool {
        self.items.is_empty()
    }

    pub fn append(&mut self, matches: &mut Self) -> () {
        self.items.append(&mut matches.items);
    }
}

impl Display for Match {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}: line {}: {}", self.file_name, self.line_number, self.text)
    }
}

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

        for (idx, item) in self.items.iter().enumerate() {
            if idx > 0 {
                writeln!(f)?;
            }

            write!(f, "{}", item)?;
        }

        Ok(())
    }
}