name: Docker SSoT Guard

permissions:
  contents: read

concurrency:
  group: ssot-guard-${{ github.ref }}
  cancel-in-progress: true

on:
  push:
    branches: [ main ]
    paths:
      - 'docker/**'
      - 'dockerfiles/**'
      - 'docker-compose*.yml*'
      - 'scripts/**'
      - '.github/workflows/ssot-guard.yml'
  pull_request:
    paths:
      - 'docker/**'
      - 'dockerfiles/**'
      - 'docker-compose*.yml*'
      - 'scripts/**'
      - '.github/workflows/ssot-guard.yml'

jobs:
  ssot-guard:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v5
        with:
          fetch-depth: 0

      - name: Show environment
        run: |
          bash --version
          docker --version || true
          compose_ver=$(docker compose version 2>/dev/null || true); echo "docker compose: $compose_ver"

      - name: Sync versions to env files
        run: bash scripts/docker-versions-update.sh sync

      - name: Generate docker-compose files (all)
        run: bash scripts/generate-compose-files.sh all development

      - name: Validate Docker SSoT consistency
        run: bash scripts/validate-docker-consistency.sh all

      - name: Build vs Runtime variable guards
        run: |
          set -euo pipefail
          echo "[Guard] Prüfe, dass keine Laufzeit-Variablen in Build-Args-Dateien vorkommen..."
          RUNTIME_KEYS_REGEX='^(GATEWAY_HOST|GATEWAY_PORT|WEB_APP_PORT|NODE_ENV|CONSUL_(HOST|PORT|ENABLED)|DB_(HOST|PORT|NAME|USER|USERNAME|PASSWORD)|POSTGRES_DB|REDIS_PORT|KEYCLOAK_PORT|PING_SERVICE_PORT|MEMBERS_SERVICE_PORT|HORSES_SERVICE_PORT|EVENTS_SERVICE_PORT|MASTERDATA_SERVICE_PORT|AUTH_SERVICE_PORT|MONITORING_SERVER_PORT|PROMETHEUS_PORT|GRAFANA_PORT|JWT_ISSUER|JWT_AUDIENCE)$'
          FAIL=0
          shopt -s nullglob
          for f in docker/build-args/*.env config/build/*.env; do
            [ -f "$f" ] || continue
            BAD=$(grep -E '^[A-Z0-9_]+=' "$f" | cut -d= -f1 | grep -E "$RUNTIME_KEYS_REGEX" || true)
            if [ -n "$BAD" ]; then
              echo "Fehler: Laufzeit-Variablen in Build-Args Datei $f gefunden:"; echo "$BAD"; FAIL=1
            fi
          done
          shopt -u nullglob
          if [ $FAIL -ne 0 ]; then
            echo "Build vs Runtime Trennung verletzt."; exit 1; fi

          echo "[Guard] Prüfe, dass keine Build-/Versions-Variablen in Runtime-Env vorkommen..."
          BUILD_KEYS_REGEX='^(GRADLE_VERSION|JAVA_VERSION|VERSION|APP_VERSION|[A-Z]+_IMAGE_TAG)$'
          shopt -s nullglob
          for f in config/env/.env .env.template; do
            [ -f "$f" ] || continue
            BAD=$(grep -E '^[A-Z0-9_]+=' "$f" | cut -d= -f1 | grep -E "$BUILD_KEYS_REGEX" || true)
            if [ -n "$BAD" ]; then
              echo "Fehler: Build-/Versions-Variablen in Runtime-Env $f gefunden:"; echo "$BAD"; FAIL=1
            fi
          done
          shopt -u nullglob
          if [ $FAIL -ne 0 ]; then
            echo "Build-/Runtime-Mischung in Runtime-Env."; exit 1; fi

      - name: Check versions.toml vs global.env consistency
        run: |
          set -euo pipefail
          TOML=docker/versions.toml
          GLOBAL=docker/build-args/global.env
          [ -f "$TOML" ] || { echo "Missing $TOML"; exit 1; }
          [ -f "$GLOBAL" ] || { echo "Missing $GLOBAL"; exit 1; }

          get_toml_ver(){ awk -F'=' -v key="$1" '/^\[versions\]/{in_vers=1; next} /^\[/{in_vers=0} in_vers && gsub(/^[ \t]+|[ \t]+$/,"",$1) && $1==key {gsub(/[ "\t]/,"",$2); print $2; exit}' "$TOML"; }
          mapfile -t checks < <(printf "%s\n" \
            "GRADLE_VERSION:versions.gradle" \
            "JAVA_VERSION:versions.java" \
            "VERSION:versions.app-version" \
            "PROMETHEUS_IMAGE_TAG:versions.prometheus" \
            "GRAFANA_IMAGE_TAG:versions.grafana" \
            "KEYCLOAK_IMAGE_TAG:versions.keycloak" \
            "POSTGRES_IMAGE_TAG:versions.postgres" \
            "REDIS_IMAGE_TAG:versions.redis" \
            "CONSUL_IMAGE_TAG:versions.consul" \
            "ZOOKEEPER_IMAGE_TAG:versions.zookeeper" \
            "KAFKA_IMAGE_TAG:versions.kafka")

          FAIL=0
          for entry in "${checks[@]}"; do
            var=${entry%%:*}; path=${entry##*:}
            key=${path#*.}
            case "$var" in
              GRADLE_VERSION) expected=$(get_toml_ver gradle) ;;
              JAVA_VERSION) expected=$(get_toml_ver java) ;;
              VERSION) expected=$(get_toml_ver app-version) ;;
              PROMETHEUS_IMAGE_TAG) expected=$(get_toml_ver prometheus) ;;
              GRAFANA_IMAGE_TAG) expected=$(get_toml_ver grafana) ;;
              KEYCLOAK_IMAGE_TAG) expected=$(get_toml_ver keycloak) ;;
              POSTGRES_IMAGE_TAG) expected=$(get_toml_ver postgres) ;;
              REDIS_IMAGE_TAG) expected=$(get_toml_ver redis) ;;
              CONSUL_IMAGE_TAG) expected=$(get_toml_ver consul) ;;
              ZOOKEEPER_IMAGE_TAG) expected=$(get_toml_ver zookeeper) ;;
              KAFKA_IMAGE_TAG) expected=$(get_toml_ver kafka) ;;
            esac
            actual=$(grep -E "^${var}=" "$GLOBAL" | head -n1 | cut -d= -f2-)
            if [ -z "$actual" ] || [ "$actual" != "$expected" ]; then
              echo "Versions-Drift: $var global.env='$actual' != versions.toml('$expected')"; FAIL=1
            fi
          done
          if [ $FAIL -ne 0 ]; then
            echo "Versions SSoT-Drift erkannt."; exit 1; fi

      - name: Check drift of generated artifacts (ignore timestamps)
        run: |
          set -euo pipefail
          # Gather modified files after sync+generate
          CHANGED=$(git diff --name-only)
          if [ -z "$CHANGED" ]; then
            echo "No drift detected."
            exit 0
          fi
          echo "Changed files:" $CHANGED
          fail=0
          for f in $CHANGED; do
            # Inspect actual content changes but ignore volatile timestamp/comment lines
            # Ignore lines starting with + or - that are exactly the timestamp markers we generate
            DIFF_FILTERED=$(git diff --unified=0 -- "$f" \
              | awk 'BEGIN{show=0} { \
                   if ($0 ~ /^\+\+\+|^---|^@@/) { next } \
                   if ($0 ~ /^[+-]# (Generated:|Last updated:)/) { next } \
                   if ($0 ~ /^[+-]#\s*Generated from docker\/versions.toml/) { next } \
                   if ($0 ~ /^[+-]#\s*Environment:/) { next } \
                   if ($0 ~ /^[+-]#\s*Source:/) { next } \
                   if ($0 ~ /^[+-]$/) { next } \
                   if ($0 ~ /^[+-]/) { print $0 } \
                 }')
            if [ -n "$DIFF_FILTERED" ]; then
              echo "SSoT drift detected in $f:";
              echo "$DIFF_FILTERED";
              fail=1;
            fi
          done
          if [ $fail -ne 0 ]; then
            echo "\nERROR: Generated artifacts differ from repository (beyond timestamps)."
            echo "Run:"
            echo "  bash scripts/docker-versions-update.sh sync"
            echo "  bash scripts/generate-compose-files.sh all"
            echo "and commit the changes."
            exit 1
          fi
          echo "No SSoT drift (ignoring timestamps)."


  ssot-guard-envless:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v5
        with:
          fetch-depth: 0

      - name: Show environment
        run: |
          bash --version
          docker --version || true
          compose_ver=$(docker compose version 2>/dev/null || true); echo "docker compose: $compose_ver"

      - name: Generate docker-compose files (all)
        run: bash scripts/generate-compose-files.sh all development

      - name: Validate Docker SSoT consistency (envless)
        run: DOCKER_SSOT_MODE=envless bash scripts/validate-docker-consistency.sh all

      - name: Check drift of generated artifacts (ignore timestamps)
        run: |
          set -euo pipefail
          CHANGED=$(git diff --name-only)
          if [ -z "$CHANGED" ]; then
            echo "No drift detected."
            exit 0
          fi
          echo "Changed files:" $CHANGED
          fail=0
          for f in $CHANGED; do
            DIFF_FILTERED=$(git diff --unified=0 -- "$f" \
              | awk 'BEGIN{show=0} { \
                   if ($0 ~ /^\+\+\+|^---|^@@/) { next } \
                   if ($0 ~ /^[+-]# (Generated:|Last updated:)/) { next } \
                   if ($0 ~ /^[+-]#\s*Generated from docker\/versions.toml/) { next } \
                   if ($0 ~ /^[+-]#\s*Environment:/) { next } \
                   if ($0 ~ /^[+-]#\s*Source:/) { next } \
                   if ($0 ~ /^[+-]$/) { next } \
                   if ($0 ~ /^[+-]/) { print $0 } \
                 }')
            if [ -n "$DIFF_FILTERED" ]; then
              echo "SSoT drift detected in $f:";
              echo "$DIFF_FILTERED";
              fail=1;
            fi
          done
          if [ $fail -ne 0 ]; then
            echo "\nERROR: Generated artifacts differ from repository (beyond timestamps)."
            echo "Run:"
            echo "  DOCKER_SSOT_MODE=envless bash scripts/generate-compose-files.sh all"
            echo "and commit the changes."
            exit 1
          fi
          echo "No SSoT drift (ignoring timestamps)."