require 'rest-client'
require 'json'

module Github
	class Client
		DEFAULT_OPTIONS = {
			access_token: nil,
			user: {}
		}

		attr_accessor :options

		# stores user access_token to make authenticated requests
		def initialize(options={})
			store_options(options)
			check_token
		end

		# returns user access_token
		def access_token
			@options[:access_token]
		end

		# fetches user information from github API using access_token
		# to identify user
		def user(options={})
			if options.empty?
				get_user('user') if options.empty?
			else
				get_user("users/#{options[:login]}") 
			end
		end

		# getter functions access information storked in 
		# @options or fetch information (which stores it)
		# and returns it

		# getter for name
		def name(options={})
			if options.empty? 
				user["name"]
			else
				user(options)["name"]
			end
		end

		# getter for login
		def login(options={})
			if options.empty?
				user["login"]
			else
				options[:login]
			end
		end

		# getter for email
		def email(options={})
			if options.empty?
				user["email"]
			else
				user(options)["email"]
			end
		end

		# getter for user page url
		def html_url(options={})
			if options.empty?
				user["html_url"]
			else
				user(options)["html_url"]
			end
		end

		# getter for url to get repositories from API
		def repos_url(options={})
			if options.empty?
				user['repos_url']
			else
				user(options)['repos_url']
			end
		end

		# fetches user's repositories and wraps them in RepoResponseWrapper
		def repos(options={})
			Github::ReposResponseWrapper.new(request(repos_url(options), access_token), access_token)
		end

		private


		# stores provided optiosn (included access token)
		def store_options(options)
			@options ||= DEFAULT_OPTIONS.dup
			@options.merge!(options)
		end

		# checks presence of access token on initialization. Client doesn't work without it
		def check_token
			raise ArgumentError, "No access token provided" if !access_token
		end

		# fetches user information from API using access_token to identify user
		def get_user(path)
			JSON.parse(RestClient.get("https://api.github.com/" + path, {params: {access_token: self.access_token}}))
		end


	end

end