require 'json'

module Dingtalk
  module Api
    class Base
      ACCESS_TOKEN = "access_token"
      JS_TICKET = "js_ticket"

      def initialize(corp = nil)
        @corp = corp
      end

      def access_token
        token = redis.get("#{redis_prefix}:#{@corp.corp_id}_#{ACCESS_TOKEN}")
        token.to_s.empty? ? set_access_token : token
      end

      def set_access_token
        if @corp.isv_mode?
          Suite.new.set_corp_access_token(@corp.corp_id, @corp.permanent_code)
        elsif !@corp.corp_secret.nil?
          set_corp_access_token
        end
      end

      def js_ticket
        ticket = redis.get("#{redis_prefix}:#{@corp.corp_id}_#{JS_TICKET}")
        ticket.to_s.empty? ? set_js_ticket : ticket
      end

      def set_corp_access_token
        res = http_get("#{ENDPOINT}/gettoken?corpid=#{@corp.corp_id}&corpsecret=#{@corp.corp_secret}")
        key = "#{redis_prefix}:#{@corp.corp_id}_#{ACCESS_TOKEN}"
        redis.set(key, res['access_token'], {ex: 6600})
        res['access_token']
      end

      def set_js_ticket
        key = "#{redis_prefix}:#{@corp.corp_id}_#{JS_TICKET}"
        res = http_get("#{ENDPOINT}/get_jsapi_ticket?access_token=#{access_token}")
        redis.set(key, res['ticket'], {ex: 6600})
        res['ticket']
      end

      def redis_prefix
        Dingtalk.config.redis_prefix || 'dingtalk'
      end

      private
        def default_params
          { access_token: access_token }
        end

        def payload(url, params)
          [ request_url(url), {
            params: default_params.merge(params).to_json,
            content_type: :json
          }]
        end

        def http_get(url, params = {})
          res = RestClient.get(request_url(url))
          JSON.parse(res)
        end

        def http_post(url, params = {})
          p = default_params.merge(params)
          res = RestClient.post(request_url(url), p.to_json, content_type: :json)
          JSON.parse(res)
        end

        def base_url
          ''
        end

        def request_url(url)
          if url.start_with?('https')
            url
          else
            "#{ENDPOINT}/#{base_url}/#{url}"
          end
        end

        def redis
          Dingtalk.dingtalk_redis
        end
    end
  end
end