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use super::cast::Cast;
use crate::uses::type_tools;

impl<T> Cast<Option<T>> for Result<T, String> {
	fn to(v: Option<T>) -> Self {
		v.ok_or("Is None".into())
	}
}
impl<T, E: ToString> Cast<Result<T, E>> for Result<T, String> {
	fn to(v: Result<T, E>) -> Self {
		v.map_err(|e| CONCAT!(type_name!(T), e.to_string()))
	}
}

pub trait UniformUnwrap<T> {
	fn uni_or_else<F: FnOnce(&str) -> T>(self, op: F) -> T;
}
impl<T> UniformUnwrap<T> for Option<T> {
	fn uni_or_else<F: FnOnce(&str) -> T>(self, op: F) -> T {
		self.unwrap_or_else(|| op("Is None"))
	}
}
impl<T, R: ToString> UniformUnwrap<T> for Result<T, R> {
	fn uni_or_else<F: FnOnce(&str) -> T>(self, op: F) -> T {
		self.unwrap_or_else(|e| op(&e.to_string()))
	}
}

pub trait UniformUnwrapOrDefault<T: Default> {
	fn uni_is_err(&self) -> bool;
	fn uni_err(self) -> (T, String);
}
impl<T: Default> UniformUnwrapOrDefault<T> for Option<T> {
	fn uni_is_err(&self) -> bool {
		self.is_none()
	}
	fn uni_err(self) -> (T, String) {
		(T::default(), "Is None".into())
	}
}
impl<T: Default, R: ToString> UniformUnwrapOrDefault<T> for Result<T, R> {
	fn uni_is_err(&self) -> bool {
		self.is_err()
	}
	fn uni_err(self) -> (T, String) {
		(T::default(), self.err().unwrap().to_string())
	}
}