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#![allow(unused, dead_code)]

use super::super::*;



impl Kline {

    pub fn rolling(&self, window: usize) -> Kline {
        /// takes last `window` values on which will build SMA
        let data = self.values.clone();
        let start = &data.len() - window;

        let mut new_vec = vec![];

        for i in start..data.len() {
            if start <= data.len() {
                new_vec.push(data[i]);
            } 
        }

        Kline { values: new_vec, start: Some(start) }
    }
    
    pub fn mean(&self) -> f64 {
        let acc: f64 = self.values.iter().sum();
        let res = acc/(self.values.len() as f64);
        println!("Acc {}", acc);
        res
    }
}

impl Iterator for Kline {
    type Item = f64;

    fn next(&mut self) -> Option<Self::Item> {
        let mut start = 0;

        if start <= self.values.len() {
            println!("{}", self.values[start]);
            return Some(self.values[start]);
        } else {
            return None;
        }

        start += 1;
    }
}



#[test]
fn test_values() {
    let v = vec![1_f64,2_f64,3_f64,4_f64,5_f64];
    let mut sma_field = Kline::new(v);

    assert_eq!(sma_field.next(), Some(1_f64));
    assert_eq!(sma_field.next(), Some(2_f64));
}