use std::path::PathBuf;
use std::result::Result;
use std::str::FromStr;

use lazy_static::lazy_static;
use regex::Regex;

use crate::errors::*;

#[derive(Clone, Debug)]
pub enum GitConfigEntry {
    Style(String),
    GitRemote(GitRemoteRepo),
    Path(PathBuf),
}

#[derive(Clone, Debug)]
pub enum GitRemoteRepo {
    GitHubRepo(String),
}

lazy_static! {
    static ref GITHUB_REMOTE_URL: Regex = Regex::new(r"github\.com[:/]([^/]+)/(.+)\.git").unwrap();
}

impl FromStr for GitRemoteRepo {
    type Err = Error;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        if let Some(caps) = GITHUB_REMOTE_URL.captures(s) {
            Ok(Self::GitHubRepo(format!(
                "{user}/{repo}",
                user = caps.get(1).unwrap().as_str(),
                repo = caps.get(2).unwrap().as_str()
            )))
        } else {
            Err("Not a GitHub repo.".into())
        }
    }
}