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use std::cmp::Ordering;

#[derive(Eq, Clone, Copy, Serialize, Deserialize, Debug)]
pub struct Coord {
    pub x: i32,
    pub y: i32,
}

impl Coord {
  pub fn new(x: i32, y: i32) -> Coord {
    Coord { x: x, y: y }
  }

  pub fn equals(a: Option<Coord>, b: Option<Coord>) -> bool {
    match (a, b) {
      (Some(Coord{x: x1, y: y1}), Some(Coord{x: x2, y: y2})) if (x1 == x2) & (y1 == y2) => true,
      _ => false,
    }
  }

  pub fn matches(&self, x: i32, y: i32) -> bool {
    self.x == x && self.y == y
  }

  pub fn to_flat_repr(coords: Vec<Coord>) -> Vec<i32> {
    let mut flat_result = vec![];
    for coord in coords {
      flat_result.push(coord.x);
      flat_result.push(coord.y);
    }
    flat_result
  }
}

impl Ord for Coord {
  fn cmp(&self, other: &Self) -> Ordering {
    match self.x.cmp(&other.x) {
      Ordering::Equal => self.y.cmp(&other.y),
      ord => ord,
    }
  }
}

impl PartialOrd for Coord {
  fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
    Some(self.cmp(other))
  }
}

impl PartialEq for Coord {
  fn eq(&self, other: &Self) -> bool {
    (self.x == other.x) & (self.y == other.y)
  }
}