use common::request::Request;
use std::fs::File;
use std::io::{BufRead, BufReader};
use std::path::PathBuf;

#[derive(Clone)]
pub struct PasswordDirectory {
    dir_path: PathBuf,
}

impl PasswordDirectory {
    pub fn new(path: &str) -> PasswordDirectory {
        PasswordDirectory {
            dir_path: PathBuf::from(path),
        }
    }

    pub fn check_auth(&self, request: &Request) -> bool {
        // Don't allow empty userids or test_passwords
        //
        if request.userid.is_empty() || request.userid.contains('/') || request.password.is_empty()
        {
            return false;
        }

        let mut file_name = self.dir_path.clone();
        file_name.push(&request.userid);

        if let Ok(file) = File::open(file_name) {
            for line in BufReader::new(file).lines().map_while(Result::ok) {
                if !line.starts_with('#') && line.trim() == request.password {
                    return true;
                }
            }
        }

        false
    }
}

#[cfg(test)]
mod tests {
    use crate::repository::PasswordDirectory;
    use common::request::Request;

    const TEST_PATH: &str = "../test_passwords";

    #[test]
    fn it_checks_good_password() {
        let repository = PasswordDirectory::new(TEST_PATH);

        let request = Request::new("bp", "some-rad-password", "ignore-this", "also-ignore-this");

        assert_eq!(repository.check_auth(&request), true);
    }

    #[test]
    fn it_fails_bad_password() {
        let repository = PasswordDirectory::new(TEST_PATH);

        let request = Request::new("bp", "not-correct", "ignore-this", "also-ignore-this");

        assert_eq!(repository.check_auth(&request), false);
    }

    #[test]
    fn it_fails_bad_userid() {
        let repository = PasswordDirectory::new(TEST_PATH);

        let request = Request::new(
            "bp-xxx",
            "some-rad-password",
            "ignore-this",
            "also-ignore-this",
        );

        assert_eq!(repository.check_auth(&request), false);
    }

    #[test]
    fn it_ignores_comments() {
        let repository = PasswordDirectory::new(TEST_PATH);

        let request = Request::new("bp-xxx", "commented-out", "ignore-this", "also-ignore-this");

        assert_eq!(repository.check_auth(&request), false);
    }
}