require 'api_cache'
require 'moneta'
require 'octokit'
#TODO - this is actually a github class
module Helpers

  class Github
    #TODO make this a singleton
    #TODO add repo, and branch to cache keys
    def initialize(repo, branch, github_token=ENV['GITHUB_TOKEN'])
      #TODO: inherit from base class
      @github_token = github_token
      if !@github_token || @github_token.empty?
        $stderr.puts 'github_token missing. Unable to authenticate with Github. Aborting...'
        exit 1
      end
      @repo = repo
      @branch = branch
      @logger = Logging.logger[self]
      @logger.add_appenders \
          Logging.appenders.stdout,
          Logging.appenders.file('overview.log')
      @logger.level = :info

      APICache.store = Moneta.new(:YAML, :file => "#{self.class.name}_cache")
      APICache.logger.level = Logger::INFO
      #APICache.store = nil
    end

    def client
      if !@client

        @client = Octokit::Client.new(:access_token => @github_token)
        @client.auto_paginate = true
        @client.default_media_type = "application/vnd.github.moondragon+json"
        @logger.info "Connected to Github as #{@client.user[:login]}"
      end
      @client
    end

    def hooks
        @hooks = client.hooks(@repo) unless @hooks
        @logger.info "Retrieved hooks for #{@repo}" if @hooks
        @hooks
    end

    def releases
      #APICache.get("releases") do
        client.releases(@repo)
      #end
    end

    def sprintly_product_id
        product_id = hooks.map { |h| h.config.product_id }.compact.first
        @logger.info "Sprint.ly product_id = #{product_id}" if product_id
        product_id
    end

    def ref(tag)
      #APICache.get("ref_#{tag}") do
        client.ref(@repo, "tags/" + tag)
      #end
    end

    def commit(sha)
      #APICache.get("commit_#{sha}") do
        client.commit(@repo, sha)
      #end
    end

    def commits_since(since)
      #APICache.get("commit_since_#{since}") do
        client.commits_since(@repo, since, @branch)
      #end
    end

    def commits_between(from,to)

    end
    def commits_before(to)

    end
  end
end