use anyhow::bail;

pub struct Recipe {
	template: String,
}

impl Recipe {
	const VARIABLES: [&'static str; 4] = ["URL", "SHA", "VERSION", "NEW_CHECK"];

	pub fn new(template: String) -> Self {
		Recipe { template }
	}

	pub fn validate_listed(&self) -> anyhow::Result<()> {
		let missing_variables = Recipe::VARIABLES
			.iter()
			.filter(|&variable| !self.template.contains(variable))
			.copied()
			.collect::<Vec<_>>()
			.join(", ");

		if missing_variables.len() > 0 {
			bail!("Missing variables: {}.", missing_variables)
		}

		Ok(())
	}

	pub fn validate_immediate(&self) -> anyhow::Result<()> {
		for variable in Recipe::VARIABLES {
			if !self.template.contains(variable) {
				bail!("Missing variable {}.", variable)
			}
		}

		Ok(())
	}
}