# frozen_string_literal: true

module OceanicWs
  GITHUB_REPO = "https://github.com/OceanicJS/Oceanic"

  class DocsController < OceanicWs::ApplicationController
    include ::ApplicationController::CommonAssetRoutes

    def index
      @versions = versions
    end

    def json
      render(json: {
        versions: versions,
      })
    end

    def latest
      redirect_to("/#{latest_version}#{request.fullpath[('/latest'.length)..]}")
    end

    private

    def versions
      ver = Cache.redis.smembers("oceanic:versions")
      branches = ver.filter { |v| !v.start_with?("v") }
      tags = ver.filter { |v| v.start_with?("v") }
      {
        branches: branches.sort,
        tags:     tags.sort_by { |v| Gem::Version.new(v[1..]) },
      }
    end

    def latest_version
      `git ls-remote --tags #{GITHUB_REPO}`.split("\n").map { |line| line.split("\t")[-1].gsub("refs/tags/", "") }.max_by { |ver| Gem::Version.new(ver[1..]) }
    end
  end
end