import gleam/io
import gleam/list
import argv
import gleam/erlang/charlist
import simplifile
import gleam/result.{is_ok, unwrap}


@external(erlang, "os", "cmd")
fn execute(cmd: charlist.Charlist) -> String


pub fn main() {
  let repo_dir = "/Users/taradruffel/.workspace/repos"
  case argv.load().arguments {
    ["clone", repo] -> clone_repo(repo, repo_dir)
    ["pull"] -> pull_all(repo_dir)
    ["delete", name] -> delete_repo(name, repo_dir)
    _ -> io.print("test")
  }
}

pub fn clone_repo(repo: String, repo_dir: String) -> Nil {
    execute(charlist.from_string("git " <> "clone " <> repo_dir <> repo)) |>
    io.println()
}

pub fn pull_all(repo_dir: String){
  let res = simplifile.read_directory(at: repo_dir)
  let dirs = unwrap(res, [])
  list.each(dirs, fn(x) {
    let path = repo_dir <> "/" <> x
    simplifile.read_directory(path)
    |> unwrap([])
    |> list.each(fn(y) {
      case y {
        ".git" ->
          execute(charlist.from_string("git -C " <> path <> " pull"))
          |> io.println()
        _ -> io.print("")
      }
    })
  })
}

pub fn delete_repo(name: String, repo_dir: String) -> Nil {
  let okay = simplifile.delete(file_or_dir_at: repo_dir <> name)
  case okay {
    _is_ok -> io.print("")
  }
}