apiVersion: tekton.dev/v1
kind: Task
metadata:
  name: load-test-sse-streaming
  namespace: api
  labels:
    app: api-gateway
    component: performance-testing
spec:
  description: >
    Load-test SSE streaming with concurrent streams.
    Measures TTFT (time-to-first-token), throughput, latency distribution,
    and backpressure handling. Tests issues #31, #32, #33.
  params:
  - name: image
    type: string
    description: "Container image to test (repo:tag)"
  - name: gateway-port
    type: string
    default: "8080"
  - name: concurrent-streams
    type: string
    default: "10"
    description: "Number of concurrent SSE streams to generate"
  - name: events-per-stream
    type: string
    default: "100"
    description: "Number of events each stream should receive"
  - name: event-interval-ms
    type: string
    default: "50"
    description: "Milliseconds between events from upstream"
  results:
  - name: result
    type: string
    description: "pass or fail"
  - name: summary
    type: string
    description: "Summary of load test results"
  - name: metrics
    type: string
    description: "Raw metrics JSON (TTFT, throughput, latency percentiles)"

  sidecars:
  - name: gateway
    image: $(params.image)
    env:
    - name: LISTEN_ADDR
      value: "0.0.0.0:$(params.gateway-port)"
    - name: CONFIG_PATH
      value: /etc/gateway/config.yaml
    - name: LOG_LEVEL
      value: info
    - name: AUTH_CLIENT_SECRET
      valueFrom:
        secretKeyRef:
          name: api-gw-client-secret
          key: client-secret
          optional: true
    volumeMounts:
    - name: gateway-config
      mountPath: /etc/gateway
      readOnly: true

  steps:
  - name: run-load-test
    image: curlimages/curl:8.13.0
    env:
    - name: GW
      value: "http://localhost:$(params.gateway-port)"
    - name: CONCURRENT_STREAMS
      value: $(params.concurrent-streams)
    - name: EVENTS_PER_STREAM
      value: $(params.events-per-stream)
    - name: EVENT_INTERVAL_MS
      value: $(params.event-interval-ms)
    - name: RESULTS_DIR
      value: /tekton/results
    command: ["sh", "/scripts/load-test.sh"]
    volumeMounts:
    - name: test-script
      mountPath: /scripts
      readOnly: true
    computeResources:
      requests:
        cpu: 500m
        memory: 256Mi
      limits:
        cpu: 1000m
        memory: 512Mi
    # Load test needs more time than unit tests
    timeout: 10m

  volumes:
  - name: gateway-config
    secret:
      secretName: api-gateway-config
  - name: test-script
    configMap:
      name: load-test-script
      defaultMode: 0755