use inquire::{Text, validator::{Validation}};
use inquire::{error::InquireError, Select};
use regex::Regex;

fn main() {
    let re = Regex::new(r"CHG[0-9]{6}$").unwrap();
    let options: Vec<&str> = vec!["File change", "Package Update", "Package Removal",
                                  "File Removal", "Misc. Command"];

    let change_validator = move |input: &str| if input.chars().count() == 0 {
        Ok(Validation::Invalid("Change request cannot be empty".into()))
    } else if re.is_match(input) {
        Ok(Validation::Valid)
    } else {
        Ok(Validation::Invalid("Invalid change request (e.g: CHGXXXXXX)".into()))
    };

    let validator = |input: &str| if input.chars().count() > 140 {
        Ok(Validation::Invalid("You're only allowed 140 characters.".into()))
    } else if input.chars().count() == 0 {
        Ok(Validation::Invalid("".into()))
    } else {
        Ok(Validation::Valid)
    };

    let _ = Text::new("system prompt $ ")
        .with_validator(validator)
        .prompt();

    let _ = Text::new("(e.g. CHGXXXXXX) Enter change request: ").with_validator(change_validator).prompt();

    let ans: Result<&str, InquireError> = Select::new("Change Type?", options).prompt();

    match ans {
        Ok(_) => println!("running command..."),
        Err(_) => println!("not running command..."),
    }
}