name: k6 nightly load test

# v1.0.9 W4 Day 20 — runs the mixed-scenarios k6 script against the
# staging environment every night at 02:30 UTC. The acceptance gate
# is "pass green 3 nuits consécutives" before flipping a release —
# the artifact uploaded by this workflow carries the JSON summary
# the operator inspects.
#
# Scope deliberately narrow : runs ONLY on staging, NEVER on prod.
# A separate manually-triggered workflow (workflow_dispatch) covers
# pre-launch capacity drills with a longer ramp.

on:
    # GATED — k6 hammer is too heavy for the single self-hosted runner.
    # Re-enable the cron once a dedicated load-test runner exists.
    # schedule:
    #     - cron: "30 2 * * *"
    workflow_dispatch:
        inputs:
            duration:
                description: "Duration per scenario (e.g. 5m, 15m, 1h)"
                required: false
                default: "5m"
                type: string
            base_url:
                description: "Override staging URL"
                required: false
                default: ""
                type: string

env:
    GIT_SSL_NO_VERIFY: "true"
    # Defaults — override via workflow_dispatch input or repo vars.
    DEFAULT_BASE_URL: "https://staging.veza.fr"

jobs:
    loadtest:
        name: k6 mixed scenarios (1650 VU steady)
        runs-on: [self-hosted, incus]
        timeout-minutes: 30

        steps:
            - name: Checkout
              uses: actions/checkout@v4

            - name: Install k6
              run: |
                  set -euo pipefail
                  sudo gpg -k
                  sudo gpg --no-default-keyring --keyring /usr/share/keyrings/k6-archive-keyring.gpg \
                      --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys C5AD17C747E3415A3642D57D77C6C491D6AC1D69
                  echo "deb [signed-by=/usr/share/keyrings/k6-archive-keyring.gpg] https://dl.k6.io/deb stable main" \
                      | sudo tee /etc/apt/sources.list.d/k6.list
                  sudo apt-get update
                  sudo apt-get install -y k6
                  k6 version

            - name: Resolve test inputs
              id: inputs
              run: |
                  set -euo pipefail
                  BASE_URL="${{ github.event.inputs.base_url }}"
                  if [ -z "$BASE_URL" ]; then
                      BASE_URL="${{ vars.STAGING_BASE_URL || env.DEFAULT_BASE_URL }}"
                  fi
                  DURATION="${{ github.event.inputs.duration }}"
                  if [ -z "$DURATION" ]; then
                      DURATION="5m"
                  fi
                  echo "base_url=$BASE_URL"   >> "$GITHUB_OUTPUT"
                  echo "duration=$DURATION"   >> "$GITHUB_OUTPUT"

            - name: Pre-flight — staging is reachable
              run: |
                  set -euo pipefail
                  url="${{ steps.inputs.outputs.base_url }}/api/v1/health"
                  echo "::notice::Pre-flight GET $url"
                  status=$(curl -k -sS --max-time 10 -o /dev/null -w "%{http_code}" "$url" || echo "000")
                  if [ "$status" != "200" ]; then
                      echo "::error::Staging /health returned $status — aborting load test."
                      exit 1
                  fi

            - name: Run k6 mixed scenarios
              id: run
              env:
                  BASE_URL: ${{ steps.inputs.outputs.base_url }}
                  DURATION: ${{ steps.inputs.outputs.duration }}
                  USER_TOKEN: ${{ secrets.STAGING_LOADTEST_TOKEN }}
                  STREAM_TRACK_ID: ${{ vars.STAGING_LOADTEST_TRACK_ID || '00000000-0000-0000-0000-000000000001' }}
              run: |
                  set -euo pipefail
                  if [ -z "$USER_TOKEN" ]; then
                      echo "::warning::STAGING_LOADTEST_TOKEN secret is empty — auth-required scenarios will record 401s as errors."
                  fi
                  k6 run --quiet \
                      --summary-export=k6-summary.json \
                      scripts/loadtest/k6_mixed_scenarios.js

            - name: Upload k6 summary artifact
              if: always()
              uses: actions/upload-artifact@v4
              with:
                  name: k6-summary-${{ github.run_number }}
                  path: |
                      k6-summary.json
                      scripts/loadtest/k6_mixed_scenarios.js
                  retention-days: 30

            - name: Annotate thresholds in summary
              if: always()
              run: |
                  set -euo pipefail
                  if [ ! -f k6-summary.json ]; then
                      echo "::warning::No summary artifact — k6 likely failed before write."
                      exit 0
                  fi
                  echo "## k6 load test summary" >> "$GITHUB_STEP_SUMMARY"
                  echo "" >> "$GITHUB_STEP_SUMMARY"
                  jq -r '
                      (.metrics.http_reqs.values.count // 0) as $reqs
                      | (.metrics.http_req_failed.values.rate // 0) as $err
                      | (.metrics.http_req_duration.values["p(95)"] // 0) as $p95
                      | (.metrics.http_req_duration.values["p(99)"] // 0) as $p99
                      | "- requests: \($reqs)\n- failed rate: \($err * 100 | round)/100 %\n- p95: \($p95 | round) ms\n- p99: \($p99 | round) ms"
                  ' k6-summary.json >> "$GITHUB_STEP_SUMMARY"