name: Auto-Deploy Changed Stacks

on:
  push:
    branches:
      - main

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Install git
        run: apt-get update && apt-get install -y git curl
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Detect changed stacks and deploy via Komodo API
        env:
          KOMODO_URL: ${{ secrets.KOMODO_URL }}
          KOMODO_API_KEY: ${{ secrets.KOMODO_API_KEY }}
          KOMODO_API_SECRET: ${{ secrets.KOMODO_API_SECRET }}
        run: |
          set -euo pipefail

          # ---------------------------------------------------------------
          # Detect changed paths vs the previous commit
          # ---------------------------------------------------------------
          CHANGED_FILES=$(git diff --name-only HEAD~1 HEAD)

          echo "=== Changed files ==="
          if [[ -z "$CHANGED_FILES" ]]; then
            echo "  (none)"
          else
            echo "$CHANGED_FILES"
          fi
          echo ""

          # ---------------------------------------------------------------
          # Parse changed paths → extract {node} and {stack}
          # Expected pattern: nodes/{node}/{stack}/...
          # ---------------------------------------------------------------
          declare -A SEEN_STACKS=()
          declare -a STACKS_TO_DEPLOY=()

          while IFS= read -r filepath; do
            [[ -z "$filepath" ]] && continue

            IFS='/' read -ra PARTS <<< "$filepath"

            # Must start with "nodes" and have at least 4 components
            # (nodes / {node} / {stack} / file)
            [[ "${PARTS[0]}" != "nodes" ]] && continue
            [[ "${#PARTS[@]}" -lt 4 ]] && continue

            node="${PARTS[1]}"
            stack="${PARTS[2]}"

            [[ -z "$stack" ]] && continue

            # Deduplicate: skip if this stack was already queued
            [[ -n "${SEEN_STACKS[$stack]+_}" ]] && continue
            SEEN_STACKS["$stack"]=1

            STACKS_TO_DEPLOY+=("$stack")
            echo "  Queued for deploy: $stack  (node: $node)"
          done <<< "$CHANGED_FILES"

          echo ""

          if [[ "${#STACKS_TO_DEPLOY[@]}" -eq 0 ]]; then
            echo "No stack changes detected — nothing to deploy."
            exit 0
          fi

          # ---------------------------------------------------------------
          # Call Komodo DeployStack API for each changed stack
          # ---------------------------------------------------------------
          echo "=== Triggering Komodo deployments ==="
          FAILED=0

          for stack in "${STACKS_TO_DEPLOY[@]}"; do
            echo -n "  → $stack ... "
            HTTP_STATUS=$(curl --silent --show-error --output /dev/null \
              --write-out "%{http_code}" \
              --max-time 30 \
              --request POST "${KOMODO_URL}/execute/DeployStack" \
              --header "Content-Type: application/json" \
              --header "X-Api-Key: ${KOMODO_API_KEY}" \
              --header "X-Api-Secret: ${KOMODO_API_SECRET}" \
              --data "{\"stack\": \"${stack}\"}")

            if [[ "$HTTP_STATUS" =~ ^2 ]]; then
              echo "HTTP $HTTP_STATUS OK"
            elif [[ "$HTTP_STATUS" == "404" ]]; then
              echo "HTTP 404 WARNING — stack not found in Komodo (not yet registered?)"
            else
              echo "HTTP $HTTP_STATUS FAILED"
              FAILED=1
            fi
          done

          echo ""
          if [[ "$FAILED" -ne 0 ]]; then
            echo "ERROR: One or more Komodo API calls returned a non-2xx status."
            exit 1
          fi

          echo "All deployments triggered successfully."