class SinchSms

# File lib/sinch_sms.rb, line 9
def self.send(key, secret, message, to)
  body = "{\"message\":\"#{message}\"}"
  timestamp = Time.now.iso8601
  authorization = auth(key, secret, "/v1/sms/#{to}", "POST", timestamp,  body)

  uri = URI.parse("https://messagingApi.sinch.com/v1/sms/" + to)
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true
  http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  headers = {"content-type" => "application/json", "x-timestamp" => timestamp, "authorization" => authorization}
  request = Net::HTTP::Post.new(uri.request_uri)
  request.initialize_http_header(headers)
  request.body = body
  return JSON.parse(http.request(request).body)
end

# File lib/sinch_sms.rb, line 25
def self.status(key, secret, id)
  timestamp = Time.now.iso8601
  authorization = self.auth(key, secret, "/v1/message/status/#{id}", "GET", timestamp)

  uri = URI.parse("https://messagingApi.sinch.com/v1/message/status/" + id)
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true
  http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  headers = {"content-type" => "application/json", "x-timestamp" => timestamp, "authorization" => authorization}
  request = Net::HTTP::Get.new(uri.request_uri)
  request.initialize_http_header(headers)

  return JSON.parse(http.request(request).body)
end

# File lib/sinch_sms.rb, line 41
def self.auth(key, secret, path, http_verb, timestamp, body=nil)
  scheme = "Application"
  content_type = "application/json"
  digest = OpenSSL::Digest.new('sha256')
  canonicalized_headers = "x-timestamp:" + timestamp
  
  if body
    content_md5 = Base64.encode64(Digest::MD5.digest(body.encode("UTF-8"))).strip
  else 
    content_md5 = ""
  end

  string_to_sign = http_verb + "\n" + content_md5 + "\n" + content_type + "\n" + canonicalized_headers + "\n" + path        
  signature = Base64.encode64(OpenSSL::HMAC.digest(digest, Base64.decode64(secret), string_to_sign.encode("UTF-8"))).strip

  return "Application #{key}:#{signature}"
end