use crate::assets::PostAsset;
use regex::Regex;

const ACTION_REGEX: &str = r"/{0,1}(?P<action>\w*)/(?P<id>.+)";

pub enum Router {
    NotFound,
    Index,
    Post { page: String },
}

pub fn blog_post_exists(name: &str) -> bool {
    PostAsset::iter().any(|x| name.eq(&x.to_string()))
}

impl Router {
    pub fn new(path: &str) -> Router {
        let re = Regex::new(ACTION_REGEX).unwrap();
        let caps = re.captures(path);
        let action = match caps {
            Some(ref value) => &value["action"],
            None => "index",
        };


        // this 7 means the "/posts/" from the full path
        let trimmed_path: String = path.chars().skip(7).collect();
        if action.eq("posts") && !blog_post_exists(&trimmed_path) {
            return Router::NotFound;
        }

        match action {
            "posts" => Router::Post {
                page: caps.unwrap()["id"].to_string(),
            },
            "index" => Router::Index,
            _ => Router::NotFound,
        }
    }
}