// Copyright (C) Catsh authors. All right reserved.
use crate::logs::{Log, LogLevel};
use rustyline::error::ReadlineError;
use rustyline::Editor;

use crate::dirs;

#[derive(Debug)]
pub struct Prompt {
    private: bool,
}

impl Prompt {
    pub fn new(private: bool) -> Self {
        #[cfg(unix)]
        let history_file: String = format!(
            "{}/catsh_history",
            dirs::CatshDirs::load().config_dir().to_str().unwrap()
        );

        #[cfg(windows)]
        let history_file: String = format!(
            "{}\\catsh_history",
            dirs::CatshDirs::load().config_dir().to_str().unwrap()
        );

        let mut rl = Editor::<()>::new();

        if !private && rl.load_history(&history_file).is_err() {
            Log::new(LogLevel::Warning, 0, "No previous history.").show();
        }

        loop {
            let readline = rl.readline("-| ");
            match readline {
                Ok(line) => {
                    if !private {
                        rl.add_history_entry(line.as_str());
                    }
                    Log::new(LogLevel::Error, 1, "Command not found.").show();
                }
                Err(ReadlineError::Interrupted) => {
                    continue;
                }
                Err(ReadlineError::Eof) => {
                    Log::new(LogLevel::Info, 130, "Bye!").show();
                    break;
                }
                Err(err) => {
                    Log::new(LogLevel::Error, 1, err.to_string().as_str());
                    break;
                }
            }
        }

        if !private {
            rl.save_history(&history_file).unwrap();
        }

        Self { private }
    }

    pub fn is_private(&self) -> bool {
        self.private
    }
}
