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use crate::tools::default_true;
use serde::{Deserialize, Serialize};

#[derive(Debug, Serialize, Deserialize, Copy, Clone)]
#[serde(deny_unknown_fields)]
pub struct Range {
    #[serde(default)]
    pub min: Option<f64>,
    #[serde(default)]
    pub max: Option<f64>,
    #[serde(default = "default_true")]
    pub min_eq: bool,
    #[serde(default = "default_true")]
    pub max_eq: bool,
}

impl Default for Range {
    fn default() -> Self {
        Self {
            min: None,
            max: None,
            min_eq: true,
            max_eq: true,
        }
    }
}

impl Range {
    pub fn matches(&self, val: f64) -> bool {
        if let Some(min) = self.min {
            if (self.min_eq && val < min) || (!self.min_eq && val <= min) {
                return false;
            }
        }
        if let Some(max) = self.max {
            if (self.max_eq && val > max) || (!self.max_eq && val >= max) {
                return false;
            }
        }
        true
    }
}

#[cfg(test)]
mod test {
    use super::Range;

    #[test]
    fn test_range() {
        let r = Range::default();
        assert!(r.matches(111.0));
        let mut r = Range {
            min: Some(0.0),
            max: None,
            min_eq: true,
            max_eq: false,
        };
        assert!(r.matches(1.0));
        assert!(r.matches(0.0));
        assert!(!r.matches(-1.0));
        r.min_eq = false;
        assert!(r.matches(1.0));
        assert!(!r.matches(0.0));
        assert!(!r.matches(-1.0));
        r.max = Some(100.0);
        assert!(r.matches(1.0));
        assert!(!r.matches(0.0));
        assert!(!r.matches(-1.0));
        assert!(r.matches(99.0));
        assert!(!r.matches(100.0));
        assert!(!r.matches(101.0));
        r.max_eq = true;
        assert!(r.matches(1.0));
        assert!(!r.matches(0.0));
        assert!(!r.matches(-1.0));
        assert!(r.matches(99.0));
        assert!(r.matches(100.0));
        assert!(!r.matches(101.0));
        let r = Range {
            min: None,
            max: Some(100.0),
            min_eq: false,
            max_eq: true,
        };
        assert!(r.matches(1.0));
        assert!(r.matches(0.0));
        assert!(r.matches(-1.0));
        assert!(r.matches(99.0));
        assert!(r.matches(100.0));
        assert!(!r.matches(101.0));
    }
}