use std::{env, fmt};

/// version type
#[derive(Default)]
pub struct Version {
	major: u32,
	minor: u32,
	patch: u32,
}

impl Version {
	/// read version at compile time from env variables
	pub fn new() -> Self {
		let mut res = Self::default();
		let major_str = env!("CARGO_PKG_VERSION_MAJOR");
		if let Ok(major) = major_str.parse::<u32>() {
			res.major = major;
		}
		let minor_str = env!("CARGO_PKG_VERSION_MINOR");
		if let Ok(minor) = minor_str.parse::<u32>() {
			res.minor = minor;
		}
		let patch_str = env!("CARGO_PKG_VERSION_PATCH");
		if let Ok(patch) = patch_str.parse::<u32>() {
			res.patch = patch;
		}
		res
	}
}

impl fmt::Display for Version {
	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
		write!(f, "v{}.{}.{}", self.major, self.minor, self.patch)
	}
}