# Phase 6.6: Terraform Module to Create kmsvc Topics
# Topics:
#   - poimen-memory-dlq
#   - poimen-memory-metric-dlq
#
# Usage:
#   terraform init
#   terraform apply -target=null_resource.create_kmsvc_topics
#
# Or add to existing Terraform stack

terraform {
  required_version = ">= 1.0"
  required_providers {
    null = {
      source  = "hashicorp/null"
      version = "~> 3.2"
    }
  }
}

# Variables
variable "management_service_endpoint" {
  description = "Management service endpoint (SQS API)"
  type        = string
  default     = "http://localhost:8080"
}

variable "namespace" {
  description = "Kubernetes namespace for port-forward"
  type        = string
  default     = "sqs"
}

variable "service_name" {
  description = "Management service name"
  type        = string
  default     = "management-service"
}

# Local function to create topics
locals {
  topics = {
    "poimen-memory-dlq" = {
      description                   = "DLQ for extraction, webhook, and agent failures"
      fifoQueue                      = false
      visibilityTimeoutSeconds       = 300
      messageRetentionPeriodSeconds  = 1209600  # 14 days
    }
    "poimen-memory-metric-dlq" = {
      description                   = "DLQ for metrics persistence failures"
      fifoQueue                      = false
      visibilityTimeoutSeconds       = 300
      messageRetentionPeriodSeconds  = 1209600  # 14 days
    }
  }
}

# Create topics via null_resource + local-exec
resource "null_resource" "create_kmsvc_topics" {
  for_each = local.topics

  provisioner "local-exec" {
    command = <<-EOT
      curl -X POST "${var.management_service_endpoint}/v1/queues" \
        -H "Content-Type: application/json" \
        -d '{
          "name": "${each.key}",
          "fifoQueue": ${each.value.fifoQueue},
          "visibilityTimeoutSeconds": ${each.value.visibilityTimeoutSeconds},
          "messageRetentionPeriodSeconds": ${each.value.messageRetentionPeriodSeconds}
        }' \
        -w "\nResponse Status: %{http_code}\n" || echo "Topic creation failed or already exists"
    EOT
  }

  triggers = {
    topic_name = each.key
    endpoint   = var.management_service_endpoint
  }
}

# Output
output "created_topics" {
  description = "Created kmsvc topics"
  value       = keys(local.topics)
}

output "management_service_endpoint" {
  description = "Management service endpoint used"
  value       = var.management_service_endpoint
}

# Instructions for local testing
output "local_test_commands" {
  description = "Commands to test locally"
  value = <<-EOT
    # Port-forward
    kubectl -n ${var.namespace} port-forward svc/${var.service_name} 8080:8080 &
    
    # Create topics
    terraform apply -target=null_resource.create_kmsvc_topics \
      -var="management_service_endpoint=http://localhost:8080"
    
    # List topics
    curl http://localhost:8080/v1/queues | jq
    
    # Send test message to DLQ
    curl -X POST http://localhost:8080/v1/queues/poimen-memory-dlq/messages \
      -H "Content-Type: application/json" \
      -d '{"body": "test message"}'
  EOT
}