use crate::{MessageChecker, Severity};

use itertools::Itertools;

use std::marker::PhantomData;

struct LetterRepeatChecker<T> {

    threshold: usize,

    player_id_type: PhantomData<T>,

}

impl<T> LetterRepeatChecker<T> {

    pub fn new(threshold: usize) -> Self {

        Self {

            threshold,

            player_id_type: PhantomData,

        }

    }

}

impl<T> MessageChecker<T> for LetterRepeatChecker<T> {

    fn check(&self, _player_id: T, message: &str) -> Severity {

        for (_key, group) in &message.chars().into_iter().group_by(|c| *c) {

            if group.count() >= self.threshold {

                return Severity::Warn;

            }

        }

        Severity::Pass

    }

}

#[cfg(test)]

mod tests {

    use super::*;

    #[test]

    fn it_works() {

        let checker = LetterRepeatChecker::new(3);

        assert_eq!(checker.check(0, "Hello world!"), Severity::Pass);

        assert_eq!(checker.check(0, "ooops"), Severity::Warn);

        assert_eq!(

            checker.check(0, "жираф - длинношеее животное"),

            Severity::Warn

        );

    }

}