@startuml Analytics Tracking

' Dark mode theme settings
!include https://raw.githubusercontent.com/patrik-csak/one-dark-plantuml-theme/v1.0.1/theme.puml

' Override default theme settings for better dark mode
skinparam backgroundColor #282c34
skinparam defaultTextAlignment center
skinparam noteTextAlignment left
skinparam ArrowColor #abb2bf
skinparam NoteBorderColor #61afef
skinparam NoteBackgroundColor #2c323c
skinparam NoteFontColor #abb2bf
skinparam Nodesep 100
skinparam Ranksep 100
skinparam Dpi 96
skinparam PageMargin 150
skinparam BoxPadding 150

start

:Client requests shortened URL;

:API Gateway receives request;

:URL Service processes redirection;

:Analytics Service receives click event;

fork
  :Extract request metadata (IP, User-Agent, Referrer);
  :Determine geolocation from IP;
  :Parse User-Agent for device/browser info;
fork again
  :Increment click counter for URL;
  :Update last accessed timestamp;
end fork

:Create Analytics record;

:Save Analytics data to repository;

fork
  :Update real-time metrics in cache;
fork again
  :Queue for batch processing;
end fork

:Return redirection response to user;

stop
@enduml