# ─────────────────────────────────────────────────────────────────────────────
# DQE Pipeline: The Null Transform
# Classification: Operational  |  ID: DQE-PIPE-001
#
# 12 sequential stages. No transformation is applied at any stage.
# Output is guaranteed to be identical to input.
# Average latency: 340ms. Cost per run: ~$0.002.
#
# "We didn't need to do this. We did it anyway." — DQE Engineering Review, 2024
# ─────────────────────────────────────────────────────────────────────────────

variables:
  INPUT: "your-data-here"
  PIPELINE_ID: "DQE-PIPE-001"

stages:
  - intake
  - validate-receipt
  - pre-process
  - normalize
  - transform-alpha
  - transform-beta
  - transform-gamma
  - post-process
  - verify-integrity
  - audit
  - package
  - egress

.passthrough: &passthrough
  script:
    - echo "[DQE-PIPE-001] Stage ${CI_JOB_STAGE} — job ${CI_JOB_NAME}"
    - echo "Received: ${INPUT}"
    - echo "Forwarding: ${INPUT} (unchanged)"
  artifacts:
    reports:
      dotenv: passthrough.env
  before_script:
    - echo "INPUT=${INPUT}" > passthrough.env

intake:
  stage: intake
  <<: *passthrough

validate-receipt:
  stage: validate-receipt
  needs: [intake]
  script:
    - echo "[DQE-PIPE-001] validate-receipt — confirming Stage 1 received the input."
    - echo "Input received in Stage 1: ${INPUT}"
    - echo "Confirmation: CONFIRMED"
    - echo "INPUT=${INPUT}" > passthrough.env
  artifacts:
    reports:
      dotenv: passthrough.env

pre-process:
  stage: pre-process
  needs: [validate-receipt]
  <<: *passthrough

normalize:
  stage: normalize
  needs: [pre-process]
  script:
    - echo "[DQE-PIPE-001] normalize — assessing whether normalization is required."
    - echo "Input: ${INPUT}"
    - echo "Normalization assessment: not required"
    - echo "Action taken: none"
    - echo "INPUT=${INPUT}" > passthrough.env
  artifacts:
    reports:
      dotenv: passthrough.env

transform-alpha:
  stage: transform-alpha
  needs: [normalize]
  <<: *passthrough

transform-beta:
  stage: transform-beta
  needs: [transform-alpha]
  <<: *passthrough

transform-gamma:
  stage: transform-gamma
  needs: [transform-beta]
  <<: *passthrough

post-process:
  stage: post-process
  needs: [transform-gamma]
  <<: *passthrough

verify-integrity:
  stage: verify-integrity
  needs: [post-process]
  script:
    - echo "[DQE-PIPE-001] verify-integrity — confirming output matches input."
    - echo "Input:  ${INPUT}"
    - echo "Output: ${INPUT}"
    - |
      if [ "${INPUT}" = "${INPUT}" ]; then
        echo "Integrity check: PASSED"
        echo "The output is identical to the input. This is expected and correct."
      fi
    - echo "INPUT=${INPUT}" > passthrough.env
  artifacts:
    reports:
      dotenv: passthrough.env

audit:
  stage: audit
  needs: [verify-integrity]
  script:
    - echo "[DQE-PIPE-001] audit — generating audit trail."
    - echo "Pipeline:   ${PIPELINE_ID}"
    - echo "Job ID:     ${CI_JOB_ID}"
    - echo "Timestamp:  $(date -u +%Y-%m-%dT%H:%M:%SZ)"
    - echo "Input:      ${INPUT}"
    - echo "Output:     ${INPUT}"
    - echo "Delta:      none"
    - echo "Audit complete. All 12 stages accounted for."
    - echo "INPUT=${INPUT}" > passthrough.env
  artifacts:
    reports:
      dotenv: passthrough.env

package:
  stage: package
  needs: [audit]
  <<: *passthrough

egress:
  stage: egress
  needs: [package]
  script:
    - echo "[DQE-PIPE-001] egress — pipeline complete."
    - echo "Final output: ${INPUT}"
    - echo "Stages executed: 12"
    - echo "Transformations applied: 0"
    - echo "Net effect: none"
    - echo ""
    - echo "Thank you for using The Null Transform."
    - echo "Your data has been processed with the full weight of enterprise infrastructure."