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use std::collections::HashMap;
use std::time::{SystemTime, UNIX_EPOCH};

struct Value {
    pub start: u64,
    pub limit: u64,
}

pub struct ChronoTimer {
    timers: HashMap<String, Value>,
}

impl ChronoTimer {
    pub fn new() -> ChronoTimer {
        ChronoTimer {
            timers: HashMap::new(),
        }
    }

    pub fn after_x_ms(&mut self, id: &str, ms: u64) -> bool {
        let mut value = &mut Value {
            start: 0,
            limit: 99,
        }; //Placeholder data
        let mut new_flag = false;

        {
            let result = self.timers.get_mut(id);

            match result {
                Some(v) => value = v,
                None => new_flag = true,
            }
        }

        if new_flag {
            self.timers.insert(
                id.to_string(),
                Value {
                    start: current_time_milliseconds(),
                    limit: ms,
                },
            );
            return false;
        }

        if (current_time_milliseconds() - value.start) >= value.limit {
            self.timers.remove(id);
            return true;
        } else {
            return false;
        }
    }

    pub fn every_x_ms(&mut self, id: &str, ms: u64) -> bool {
        let mut value = &mut Value {
            start: 0,
            limit: 99,
        }; //Placeholder data
        let mut new_flag = false;

        {
            let result = self.timers.get_mut(id);

            match result {
                Some(v) => value = v,
                None => new_flag = true,
            }
        }

        if new_flag {
            self.timers.insert(
                id.to_string(),
                Value {
                    start: current_time_milliseconds(),
                    limit: ms,
                },
            );
            return false;
        }

        if (current_time_milliseconds() - value.start) >= value.limit {
            value.start = current_time_milliseconds();
            return true;
        } else {
            return false;
        }
    }
}

fn current_time_milliseconds() -> u64 {
    let time = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .expect("Time went backwards");

    let time_in_ms = time.as_secs() * 1000 + time.subsec_nanos() as u64 / 1_000_000;

    time_in_ms
}