use crate::errors::SocialError;
use git2::{Error as GitError, Repository, Tree};
use std::{fs::read_to_string, path::Path};

pub struct SocialRepo {
    pub repo: Repository,
}

impl<'repo> SocialRepo {
    pub fn new(path: &str) -> Result<Self, SocialError> {
        Repository::open(path)
            .map(|repo| Self { repo })
            .map_err(|_| {
                let err = "fatal: not a git repository";
                SocialError::from(err)
            })
    }

    pub fn get_tree(&self, rev: &str) -> Result<Tree, GitError> {
        self.repo
            .revparse_single(rev)
            .and_then(|obj| obj.peel_to_tree())
    }

    pub fn get_description(&self) -> String {
        // The description is in a file named "description",
        // in the .git directory, or the root directory if bare.
        let git_path = self.repo.path().join(Path::new("description"));
        read_to_string(git_path).unwrap_or("".to_string())
    }
}