C4Component
    title Azure Integration Services - Component View
    Container_Boundary(api_layer, "API Layer") {
        Component(order_api, "Order API Handler", "API", "Order submit and status endpoint")
        Component(customer_api, "Customer API", "API", "Customer lookup and sync endpoint")
        Component(product_api, "Product API", "API", "Product lookup endpoint")
    }
    Container_Boundary(workflow_layer, "Workflow Layer") {
        Container(order_intake_logic_app, "INT1337-RCV-Order-Incoming (Logic App)", "Workflow", "Receive and validate order request")
        Container(order_routing_logic_app, "INT1337-SND-Confirm-Outgoing (Logic App)", "Workflow", "Route confirmations to customer and partner channels")
        Container(invoice_logic_app, "INT1337-INV-Order-Invoiced (Logic App)", "Workflow", "Handle invoice posting and retries")
        Container(sync_logic_app, "INT1337-PLN-Order-Scheduled (Logic App)", "Workflow", "Scheduled planning and ERP synchronization")
        Component(retry_policy, "Retry Handling", "Workflow", "Backoff and retry policy execution")
    }
    Container_Boundary(messaging_layer, "Messaging Layer") {
        ComponentQueue(order_events_topic, "Order Events Topic", "Service Bus Topic", "Publish/subscribe order events")
        ComponentQueue(invoice_requests_queue, "Invoice Requests Queue", "Service Bus Queue", "Asynchronous invoice processing")
        ComponentQueue(dead_letter_queue, "Dead Letter Queue", "Service Bus Queue", "Poison message handling")
    }
    Container_Boundary(platform_layer, "Platform Services") {
        Component(function_enrichment, "Deduplication Guard Function", "Function", "Custom deduplication and payload enrichment")
        Component(key_vault_secrets, "Key Vault Secrets", "Security", "Secret and certificate retrieval")
        Component(app_insights, "Application Insights", "Monitoring", "Telemetry and diagnostics")
    }
    Rel(order_api, order_intake_logic_app, "Submit order", "HTTPS")
    Rel(order_intake_logic_app, order_routing_logic_app, "Validated order", "Workflow")
    Rel(order_routing_logic_app, order_events_topic, "Publish order event", "AMQP")
    Rel(order_routing_logic_app, invoice_requests_queue, "Enqueue invoice request", "AMQP")
    Rel(invoice_requests_queue, invoice_logic_app, "Consume invoice request", "AMQP")
    Rel(invoice_logic_app, retry_policy, "Apply retry policy", "Workflow")
    Rel(retry_policy, dead_letter_queue, "Route poison message", "AMQP")
    Rel(order_events_topic, function_enrichment, "Subscribe and enrich", "AMQP")
    Rel(sync_logic_app, customer_api, "Sync customer", "REST")
    Rel(order_routing_logic_app, product_api, "Resolve product", "REST")
    Rel(order_intake_logic_app, key_vault_secrets, "Read secret", "Managed Identity")
    Rel(order_routing_logic_app, key_vault_secrets, "Read secret", "Managed Identity")
    Rel(invoice_logic_app, key_vault_secrets, "Read secret", "Managed Identity")
    Rel(order_intake_logic_app, app_insights, "Write telemetry", "Telemetry")
    Rel(order_routing_logic_app, app_insights, "Write telemetry", "Telemetry")
    Rel(invoice_logic_app, app_insights, "Write telemetry", "Telemetry")
    Rel(sync_logic_app, app_insights, "Write telemetry", "Telemetry")
    Rel(retry_policy, app_insights, "Write retry metrics", "Telemetry")
    Rel(dead_letter_queue, app_insights, "Write failure metrics", "Telemetry")