use std::collections::BTreeMap;

use anyhow::Context;
use askama::Template;
use axum::{response::Response, Extension};

use crate::{
    into_response,
    methods::{
        filters,
        repo::{Refs, Repository, Result},
    },
};

#[derive(Template)]
#[template(path = "repo/refs.html")]
pub struct View {
    repo: Repository,
    refs: Refs,
}

#[allow(clippy::unused_async)]
pub async fn handle(
    Extension(repo): Extension<Repository>,
    Extension(db): Extension<sled::Db>,
) -> Result<Response> {
    let repository = crate::database::schema::repository::Repository::open(&db, &*repo)?
        .context("Repository does not exist")?;

    let mut heads = BTreeMap::new();
    for head in repository.get().heads(&db) {
        let commit_tree = repository.get().commit_tree(&db, &head)?;
        let name = head.strip_prefix("refs/heads/");

        if let (Some(name), Some(commit)) = (name, commit_tree.fetch_latest_one()) {
            heads.insert(name.to_string(), commit);
        }
    }

    let tags = repository
        .get()
        .tag_tree(&db)
        .context("Failed to fetch indexed tags")?
        .fetch_all();

    Ok(into_response(&View {
        repo,
        refs: Refs { heads, tags },
    }))
}