class Envirobly::Git::Commit

def dir_exists?(path)
  suffix = path.end_with?("/") ? nil : "/"
  git(%(cat-file -t #{@ref}:#{path}#{suffix})).stdout.strip == "tree"
end

def exists?
  git(%(cat-file -t #{@ref})).stdout.strip == "commit"
end

def file_content(path)
  git(%(show #{@ref}:#{path})).stdout
end

def file_exists?(path)
  git(%(cat-file -t #{@ref}:#{path})).stdout.strip == "blob"
end

def initialize(ref, working_dir: Dir.getwd)
  @ref = ref
  super working_dir
end

def message
  git(%(log #{@ref} -n1 --pretty=%B)).stdout.strip
end

def object_tree(ref: @ref, chdir: @working_dir)
  @object_tree ||= begin
    objects = {}
    objects[chdir] = []
    git(%(ls-tree -r #{ref}), chdir:).stdout.lines.each do |line|
      mode, type, object_hash, path = line.split(/\s+/)
      next if path.start_with?("#{Envirobly::Config::DIR}/")
      if type == "commit"
        objects.merge! object_tree(ref: object_hash, chdir: File.join(chdir, path))
      else
        objects[chdir] << [ mode, type, object_hash, path ]
      end
    end
    objects
  end
end

def object_tree_checksum
  digestable = object_tree.values.flatten.to_json
  @object_tree_checksum ||= Digest::SHA256.hexdigest(digestable)
end

def objects_with_checksum_at(path)
  git(%{ls-tree #{@ref} --format='%(objectname) %(path)' #{path}}).stdout.lines.map(&:chomp).
    reject { _1.split(" ").last == Envirobly::Config::DIR }
end

def ref
  @normalized_ref ||= git(%(rev-parse #{@ref})).stdout.strip
end

def short_ref
  @short_ref ||= ref[0..6]
end

def time
  Time.parse git(%(log #{@ref} -n1 --date=iso --pretty=format:"%ad")).stdout
end