workspace "Foxit PDF Cloud API" "This is the C4 model of the Foxit PDF Cloud API system." {

    model {
        user = person "User" "A user of the PDF Cloud API who interacts with its services." "User"

        group "Foxit PDF Cloud API" {
            pdfCloudAPI = softwaresystem "PDF Cloud API" "Provides PDF-related functionalities via APIs, embedding, and management tools." {
                pdfEmbedAPI = container "PDF Embed API" "Embeds a PDF viewer in web pages." "JavaScript Library" "Web Browser"
                pdfServicesAPI = container "PDF Services API" "Provides PDF-related services such as conversion, splitting, and merging." "HTTP API"
                developerConsole = container "Developer Console" "Manages API keys and monitors usage." "React + Ant Design SPA" "Web Application"
                pdfApiWebsite = container "PDF API Website" "Showcases features and provides documentation." "Next.js" "Web Application"
                phpBackend = container "PHP Backend" "Core backend for handling APIs and services." "PHP + Yii Framework" {
                    authentication = component "Authentication" "API key-based authentication for Embed and Services APIs." "PHP Component"
                    pdfServicesEndpoints = component "PDF Services Endpoints" "Endpoints for PDF processing using WebTools." "PHP Component"
                    userAccountManagement = component "User & Account Management" "Handles user accounts and integrates with Foxit CAS." "PHP Component"
                    embedApiEndpoint = component "Embed API Endpoint" "Validates CLIENT_ID and serves assets for the Embed Viewer." "PHP Component"
                    developerConsoleEndpoint = component "Developer Console Endpoint" "Supports Developer Console functionalities." "PHP Component"
                    usageTracking = component "Usage Tracking" "Tracks API usage and writes data to MySQL." "PHP Component"
                    orderBillingManagement = component "Order & Billing Management" "Syncs orders, enforces quotas, and handles billing." "PHP Component"
                    notificationService = component "Notification Service" "Sends emails using SMTP with predefined templates." "PHP Component"
                }
                mysqlDatabase = container "MySQL Database" "Stores user, usage, and billing data." "MySQL Database" "Database"
                cronService = container "Cron Service" "Syncs order data with the Foxit App Store." "PHP Cron Job"
            }
        }

        // External Systems
        webTools = softwaresystem "WebTools" "Provides PDF processing capabilities for the Services API." "External System"
        foxitCAS = softwaresystem "Foxit CAS" "Handles user authentication and account management." "External System"
        foxitAppStore = softwaresystem "Foxit App Store" "Manages user orders and subscriptions." "External System"
        smtpServer = softwaresystem "SMTP Server" "Used for sending email notifications." "External System"

        // Relationships
        user -> pdfEmbedAPI "Views and interacts with embedded PDFs using"
        user -> pdfServicesAPI "Uses API endpoints for PDF operations"
        user -> developerConsole "Manages API keys and monitors usage via"
        user -> pdfApiWebsite "Accesses documentation and product features via"
        pdfServicesAPI -> webTools "Processes PDF files using"
        pdfEmbedAPI -> phpBackend "Validates CLIENT_ID via"
        developerConsole -> phpBackend "Uses backend services via"
        phpBackend -> mysqlDatabase "Stores and retrieves user, usage, and billing data"
        phpBackend -> foxitCAS "Authenticates users and manages accounts via"
        phpBackend -> foxitAppStore "Syncs order data using"
        phpBackend -> smtpServer "Sends email notifications using"

        // Relationships to components
        pdfServicesAPI -> pdfServicesEndpoints "Makes API calls to"
        pdfEmbedAPI -> embedApiEndpoint "Validates CLIENT_ID via"
        developerConsole -> developerConsoleEndpoint "Interacts with"
        usageTracking -> mysqlDatabase "Writes usage data to"
        orderBillingManagement -> foxitAppStore "Syncs order data with"
        notificationService -> smtpServer "Sends email notifications using"
    }

    views {
        systemcontext pdfCloudAPI "SystemContext" {
            include *
            title "System Context: Foxit PDF Cloud API"
            description "Contextual view of the Foxit PDF Cloud API system and its relationships."
            autoLayout
        }

        container pdfCloudAPI "Containers" {
            include *
            title "Container View: PDF Cloud API"
            description "Detailed breakdown of the containers in the PDF Cloud API system."
            autoLayout
        }

        component phpBackend "PHPBackendComponents" {
            include *
            title "Component View: PHP Backend"
            description "A detailed view of the components within the PHP Backend container."
            autoLayout
        }

        styles {
            element "Person" {
                background #08427b
                color #ffffff
                fontSize 22
                shape Person
            }
            element "Container" {
                background #438dd5
                color #ffffff
            }
            element "Software System" {
                background #1168bd
                color #ffffff
            }
            element "Database" {
                shape Cylinder
            }
            element "External System" {
                background #999999
                color #ffffff
            }
            element "Component" {
                background #85bbf0
                color #000000
            }
        }
    }
}