use osdb::branding::startup_msg;
use osdb::cli::{history_file, read_input};
use osdb::error_display::OSDBError as _;
use osdb::parser::parse;

fn main() {
    let mut rl = rustyline::DefaultEditor::new().expect("failed to create stdin reader");
    let history_file = history_file();
    if let Some(history_file) = &history_file {
        let _ = rl.load_history(history_file);
    }

    println!("{}", startup_msg());

    'main: while let Some(input) = read_input(&mut rl) {
        let file = String::from("<stdin>");

        match parse(file.clone(), input.clone()) {
            Ok(cmds) => {
                for cmd in cmds {
                    let result = cmd.execute();
                    if result.should_exit {
                        break 'main;
                    }
                    println!("{}", result.display());
                }
            }
            Err(errs) => {
                for err in errs {
                    err.display(&file, &input)
                }
            }
        }
    }

    if let Some(history_file) = &history_file {
        let _ = rl.save_history(history_file);
    }

    println!("Good-bye");
}