use std::{
    fs::File,
    io::Read,
};

struct FlagChecker {
    path_to_flag: String,
}

impl FlagChecker {
    #[allow(dead_code)]
    pub fn new(path_to_flag: String) -> Self {
        Self { path_to_flag }
    }

    #[allow(dead_code)]
    pub fn check(self) -> bool {
        let mut file_handle = File::open(self.path_to_flag).expect("Flag file not found!");
        let mut flag = String::new();

        file_handle
            .read_to_string(&mut flag)
            .expect("Can't read file");

        return flag.starts_with("TBTL{") && flag.ends_with("}\n");
    }
}
/// ```
/// /// Some documentation.
/// # fn foo() {} // this function will be hidden
/// println!("Hello, World!");
/// ```

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

    const PATH_TO_FLAG: &str = "resources/flag.txt";

    #[test]
    fn check_flag() {
        let flag_checker = FlagChecker::new(PATH_TO_FLAG.to_string());
        assert!(flag_checker.check());
    }
}