name: Renovate Image Tag Deployment

on:
  workflow_dispatch:
  pull_request:
    types: [closed]
    branches:
      - main
    paths:
      - "**/docker-compose.yml"

env:
  HC_VAULT_VERSION: "1.21.1"
  VAULT_ADDR: ${{ secrets.TREZ_VAULT_ADDR }}
  VAULT_TOKEN: ${{ secrets.VAULT_GITEA_TOKEN }}

jobs:
  deploy:
    name: Renovate PR Deployment
    if: |
      github.event.pull_request.merged == true &&
      github.event.pull_request.user.login == 'renovate-bot'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout full repository
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
        with:
          fetch-depth: 0 # required so we can access main^1

      - name: Save docker-compose.yml before merge (old)
        run: |
          git fetch origin main
          if git ls-tree -r origin/main^1 --name-only | grep -q '^docker-compose.yml$'; then
            git show origin/main^1:docker-compose.yml > docker-compose-old.yml
          else
            echo "services: {}" > docker-compose-old.yml
          fi

      - name: Save docker-compose.yml after merge (new)
        run: |
          git show origin/main:docker-compose.yml > docker-compose-new.yml

      - name: Detect services with image tag/digest changes
        id: detect_services
        run: |
          set -euo pipefail

          echo "Flattening docker-compose files..."
          yq eval '... comments=""' docker-compose-old.yml > docker-compose-old-flat.yml
          yq eval '... comments=""' docker-compose-new.yml > docker-compose-new-flat.yml

          echo "Getting service names..."
          yq eval '.services | keys | .[]' docker-compose-old-flat.yml | sort > services_old.txt
          yq eval '.services | keys | .[]' docker-compose-new-flat.yml | sort > services_new.txt

          echo "Checking for image changes..."
          : > service_changes.txt

          comm -12 services_old.txt services_new.txt | while read service; do
            old_image=$(yq eval-all --yaml-fix-merge-anchor-to-spec=true ".services[\"$service\"].image // \"\"" docker-compose-old-flat.yml)
            new_image=$(yq eval-all --yaml-fix-merge-anchor-to-spec=true ".services[\"$service\"].image // \"\"" docker-compose-new-flat.yml)

            if [ "$old_image" != "$new_image" ]; then
              echo "$service" >> service_changes.txt
            fi
          done

          echo "Detected services with changed images:"
          cat service_changes.txt || echo "None"

          changed_svcs=$(sort -u service_changes.txt | xargs || true)
          if [ -z "$changed_svcs" ]; then
            echo "No image tag/digest changes detected."
            echo "docker_svc_list<<EOF" >> "$GITHUB_OUTPUT"
            echo "" >> "$GITHUB_OUTPUT"
            echo "EOF" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          echo "Collecting direct dependencies..."
          deps_list=""
          for svc in $changed_svcs; do
            deps=$(yq -r ".services[\"$svc\"].depends_on | keys | .[]" docker-compose-new-flat.yml 2>/dev/null || true)
            if [ -n "$deps" ]; then
              echo "$svc depends on:"
              echo "$deps"
              deps_list="$deps_list $deps"
            fi
          done

          # Combine changed services and their dependencies, deduplicate
          all_svcs=$( (echo "$changed_svcs"; echo "$deps_list") | tr ' ' '\n' | sort -u )

          echo "Final service list (including direct dependencies):"
          echo "$all_svcs"

          # Prepare multiline output for GitHub Actions
          echo "docker_svc_list<<EOF" >> "$GITHUB_OUTPUT"
          echo "$all_svcs" >> "$GITHUB_OUTPUT"
          echo "EOF" >> "$GITHUB_OUTPUT"

      - name: Stop if no image changes
        if: steps.detect_services.outputs.docker_svc_list == ''
        run: |
          echo "No image tag/digest changes detected. Exiting."
          exit 1

      - name: Login to Docker Hub
        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
        with:
          username: ${{ secrets.DOCKERHUB_USER }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
        with:
          registry: ghcr.io
          username: ${{ secrets.GHCR_USER }}
          password: ${{ secrets.GHCR_LOGIN_TOKEN }}

      - name: Login to Private Gitea Registry
        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
        with:
          registry: git.trez.wtf
          username: ${{ secrets.BOT_GITEA_USER }}
          password: ${{ secrets.BOT_GITEA_PASSWORD }}

      - name: Gotify Notification (Start)
        uses: eikendev/gotify-action@ca0339b85ee8db9fda9c0718aaa7f95e17b3c617 # 0.0.4
        with:
          gotify_api_base: "${{ secrets.RUNNER_GOTIFY_URL }}"
          gotify_app_token: "${{ secrets.RUNNER_GOTIFY_TOKEN }}"
          notification_title: "GITEA: [RENOVATE] Docker Compose Deployment @ Rinoa"
          notification_message: "Starting Docker Compose run..."

      - name: Generate .env from Hashicorp Vault
        uses: https://git.trez.wtf/Trez/hc-vault-env@main
        with:
          HC_VAULT_VERSION: ${{ env.HC_VAULT_VERSION }}
          HC_VAULT_ADDR: ${{ secrets.TREZ_VAULT_ADDR }}
          HC_VAULT_AUTH: token
          HC_VAULT_TOKEN: ${{ secrets.VAULT_GITEA_TOKEN }}
          HC_VAULT_SECRETS_PATH: rinoa-docker/env

      - name: Docker Compose Deployment
        uses: hoverkraft-tech/compose-action@3846bcd61da338e9eaaf83e7ed0234a12b099b72 # v2.4.1
        env:
          DOCKER_HOST: tcp://dockerproxy:2375
        with:
          services: |
            ${{ steps.detect_services.outputs.docker_svc_list }}
          up-flags: -d --remove-orphans
          down-flags: --dry-run
          services-log-level: debug

      - name: Docker Compose Healthcheck
        id: health
        uses: jaracogmbh/docker-compose-health-check-action@973fbdccf7c8e396b652d3501984c8e530a9fa80 # v1.0.0
        with:
          max-retries: 30
          retry-interval: 10
          compose-file: "docker-compose.yml"
          skip-exited: "true"
          skip-no-healthcheck: "true"

      - name: Gotify Notification (Finish)
        uses: eikendev/gotify-action@ca0339b85ee8db9fda9c0718aaa7f95e17b3c617 # 0.0.4
        with:
          gotify_api_base: "${{ secrets.RUNNER_GOTIFY_URL }}"
          gotify_app_token: "${{ secrets.RUNNER_GOTIFY_TOKEN }}"
          notification_title: "GITEA: [RENOVATE] Docker Compose Deployment @ Rinoa"
          notification_message: "Deployment completed successfully."