mod pass;
mod rbw;
mod sh;

use std::env;
use std::io;
use std::io::{Error, ErrorKind, Write};

const ENV_VAR_DEFAULT_VAULT: &str = "PASS_VAULT";

fn ask_consent(question: String, line1: String, line2: String) -> Result<bool, Error> {
    println!("{}", question);
    println!("\t{}", line1);
    println!("\t{}", line2);
    print!("Proceed? [y/N] ");
    io::stdout().flush()?;
    let mut input = String::new();
    io::stdin().read_line(&mut input)?;

    return Ok(input.to_lowercase() == "y\n");
}

fn main() -> Result<(), Error> {
    pass::check_pass()?;
    rbw::check_rbw()?;

    let vaults = pass::get_vaults()?.vaults;
    if vaults.len() <= 0 {
        return Err(Error::new(ErrorKind::Other, "No vaults found"));
    }
    let vault_names = vaults
        .iter()
        .map(|vault| vault.name.clone())
        .collect::<Vec<String>>();

    let vault;
    match env::var(ENV_VAR_DEFAULT_VAULT) {
        Ok(default_vault) => {
            if vault_names.contains(&default_vault) {
                vault = default_vault;
            } else {
                return Err(Error::new(
                    ErrorKind::Other,
                    format!("Vault {} does not exist", default_vault),
                ));
            }
        }
        Err(_) => {
            vault = vault_names.get(0).unwrap().clone();
            println!(
                "No default vault found (you can set it with {}), using {}...",
                ENV_VAR_DEFAULT_VAULT, vault
            );
        }
    };

    let pass_items = pass::get_items(&vault)?;
    let mut pass_logins = pass::get_logins(pass_items);

    let rbw_items = rbw::get_items()?;
    let mut rbw_logins = rbw::get_logins(rbw_items)?;

    println!();
    println!(
        "Got {} rbw logins and {} pass logins...",
        rbw_logins.len(),
        pass_logins.len()
    );

    for rbw_login in rbw_logins.clone().iter() {
        let mut pass_login: Option<&pass::LoginItem> = None;

        'inner: for pass_login_iter in pass_logins.iter() {
            if rbw_login.name == pass_login_iter.title {
                pass_login = Some(pass_login_iter);
                break 'inner;
            }
        }

        if let None = pass_login {
            continue;
        }
        let pass_login = pass_login.unwrap();

        let rbw_password = rbw_login.password.clone();
        let pass_password = pass_login.password.clone();

        let rbw_user = rbw_login.user.clone();
        let pass_user = match pass_login.username.is_empty() {
            true => pass_login.email.clone(),
            false => pass_login.username.clone(),
        };
        let pass_user_is_actually_email = pass_user == pass_login.email;

        if rbw_user != pass_user || rbw_password != pass_password {
            let consent = ask_consent(
                format!("Attempting to update {}:", rbw_login.name),
                format!("{} -> {}", pass_user, rbw_user.clone()),
                format!("{} -> {}", pass_password, rbw_password.clone()),
            )?;
            if consent {
                let updated_pass_login = pass::LoginItem {
                    id: pass_login.id.clone(),
                    title: pass_login.title.clone(),
                    username: rbw_user.clone(),
                    email: rbw_user.clone(),
                    password: rbw_password,
                };
                pass::update(&vault, updated_pass_login, pass_user_is_actually_email);
            }
        }

        let rbw_index = rbw_logins
            .iter()
            .position(|x| x.id == rbw_login.id)
            .unwrap();
        rbw_logins.remove(rbw_index);

        let pass_index = pass_logins
            .iter()
            .position(|x| x.id == pass_login.id)
            .unwrap();
        pass_logins.remove(pass_index);
    }

    // TODO: need to delete these
    println!();
    println!(
        "Remaining {} rbw logins and {} pass logins...",
        rbw_logins.len(),
        pass_logins.len()
    );

    for rbw_login in rbw_logins {
        let consent = ask_consent(
            format!("Attempting to create {}:", rbw_login.name),
            format!("{}", rbw_login.user),
            format!("{}", rbw_login.password),
        )?;
        if consent {
            pass::create(&vault, rbw_login.name, rbw_login.user, rbw_login.password);
        }
    }

    for pass_login in pass_logins {
        let consent = ask_consent(
            format!("Attempting to delete {}:", pass_login.title),
            format!(
                "{}",
                if pass_login.username.is_empty() {
                    pass_login.email
                } else {
                    pass_login.username
                }
            ),
            format!("{}", pass_login.password),
        )?;
        if consent {
            pass::trash(&vault, pass_login.id);
        }
    }

    return Ok(());
}