use crate::config::CONFIG;
use chrono::{Duration, Utc};
use chrono_humanize::HumanTime;
use serde_derive::Serialize;

pub fn get_commits(
    repo_name: String,
    ammount: usize,
    after: Option<String>,
) -> Option<Vec<Commits>> {
    let mut repo_path = CONFIG.git_location.clone();
    repo_path.push(format!("{}.git", repo_name));
    let repo = git2::Repository::open(repo_path).ok()?;
    let mut revwalk = repo.revwalk().ok()?;

    revwalk.set_sorting(git2::Sort::TIME).ok()?;
    match after {
        Some(id) => revwalk.push(git2::Oid::from_str(id.as_str()).ok()?).ok()?,
        None => revwalk.push_head().ok()?,
    }
    let mut commits = Vec::new();
    let mut i = 0;
    let mut commit = revwalk.next();
    while i < ammount && commit.is_some() && commit.as_ref().unwrap().is_ok() {
        let commit_rev = commit.unwrap().unwrap();
        let repo_commit = repo.find_commit(commit_rev);
        match repo_commit {
            Ok(repo_commit) => {
                let time = Duration::seconds(repo_commit.time().seconds() - Utc::now().timestamp());
                commits.push(Commits {
                    commit_hash: commit_rev.to_string(),
                    commit: repo_commit.message().unwrap_or("").to_string(),
                    commitie: repo_commit
                        .committer()
                        .name()
                        .unwrap_or("Unknown")
                        .to_string(),
                    commit_hash_short: commit_rev.to_string()[..8].to_string(),
                    time_utc: {
                        let date = chrono::naive::NaiveDateTime::from_timestamp(
                            Utc::now().timestamp() + time.num_seconds(),
                            0,
                        );
                        format!(
                            "{} {} UTC",
                            date.date().format("%Y-%m-%d"),
                            date.time().format("%H:%M:%S")
                        )
                    },
                    time_relitive: HumanTime::from(time).to_string(),
                });
                i += 1;
            }
            Err(_) => {}
        }
        commit = revwalk.next();
    }
    Some(commits)
}

#[derive(Serialize, Clone)]
pub struct Commits {
    commit: String,
    commit_hash: String,
    commit_hash_short: String,
    commitie: String,
    time_utc: String,
    time_relitive: String,
}