name: Auto PR V2 Deployment

on:
  pull_request:
    types: [opened, synchronize, reopened, closed]
  workflow_dispatch:
    inputs:
      pr:
        description: "PR number to deploy"
        required: true
      allow_fork:
        description: "Allow deploying fork PR?"
        required: false
        type: choice
        options:
          - "true"
          - "false"
        default: "false"

permissions:
  contents: read
  issues: write
  pull-requests: write

jobs:
  check-pr:
    if: (github.event_name == 'pull_request' && github.event.action != 'closed') || github.event_name == 'workflow_dispatch'
    runs-on: ubuntu-latest
    outputs:
      should_deploy: ${{ steps.decide.outputs.should_deploy }}
      is_fork: ${{ steps.resolve.outputs.is_fork }}
      allow_fork: ${{ steps.decide.outputs.allow_fork }}
      pr_number: ${{ steps.resolve.outputs.pr_number }}
      pr_repository: ${{ steps.resolve.outputs.repository }}
      pr_ref: ${{ steps.resolve.outputs.ref }}
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
        with:
          egress-policy: audit

      - name: Resolve PR info
        id: resolve
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          script: |
            const { owner, repo } = context.repo;
            let prNumber = context.eventName === 'workflow_dispatch'
              ? parseInt(context.payload.inputs.pr, 10)
              : context.payload.number;

            if (!Number.isInteger(prNumber)) { core.setFailed('Invalid PR number'); return; }

            const { data: pr } = await github.rest.pulls.get({ owner, repo, pull_number: prNumber });
            core.setOutput('pr_number', String(prNumber));
            core.setOutput('repository', pr.head.repo.full_name);
            core.setOutput('ref', pr.head.ref);
            core.setOutput('is_fork', String(pr.head.repo.fork));
            core.setOutput('author', pr.user.login);
            core.setOutput('state', pr.state);

      - name: Decide deploy
        id: decide
        shell: bash
        env:
          EVENT_NAME: ${{ github.event_name }}
          STATE: ${{ steps.resolve.outputs.state }}
          IS_FORK: ${{ steps.resolve.outputs.is_fork }}
          # nur bei workflow_dispatch gesetzt:
          ALLOW_FORK_INPUT: ${{ inputs.allow_fork }}
          PR_AUTHOR: ${{ steps.resolve.outputs.author }}
        run: |
          set -e
          # Standard: nichts deployen
          should=false
          allow_fork="$(echo "${ALLOW_FORK_INPUT:-false}" | tr '[:upper:]' '[:lower:]')"

          if [ "$EVENT_NAME" = "workflow_dispatch" ]; then
            if [ "$STATE" != "open" ]; then
              echo "PR not open -> skip"
            else
              if [ "$IS_FORK" = "true" ] && [ "$allow_fork" != "true" ]; then
                echo "Fork PR and allow_fork=false -> skip"
              else
                should=true
              fi
            fi
          else
            auth_users=("Frooodle" "sf298" "Ludy87" "LaserKaspar" "sbplat" "reecebrowne" "DarioGii" "ConnorYoh" "EthanHealy01" "jbrunton96" "balazs-szucs")
            is_auth=false; for u in "${auth_users[@]}"; do [ "$u" = "$PR_AUTHOR" ] && is_auth=true && break; done
            if [ "$is_auth" = true ]; then
              should=true
            fi
          fi

          echo "should_deploy=$should" >> $GITHUB_OUTPUT
          echo "allow_fork=${allow_fork:-false}" >> $GITHUB_OUTPUT

  deploy-v2-pr:
    needs: check-pr
    runs-on: ubuntu-latest
    if: needs.check-pr.outputs.should_deploy == 'true' && (needs.check-pr.outputs.is_fork == 'false' || needs.check-pr.outputs.allow_fork == 'true')
    # Concurrency control - only one deployment per PR at a time
    concurrency:
      group: v2-deploy-pr-${{ needs.check-pr.outputs.pr_number }}
      cancel-in-progress: true
    permissions:
      contents: read
      issues: write
      pull-requests: write

    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
        with:
          egress-policy: audit

      - name: Checkout main repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
        with:
          repository: ${{ github.repository }}
          ref: main

      - name: Setup GitHub App Bot
        if: github.actor != 'dependabot[bot]'
        id: setup-bot
        uses: ./.github/actions/setup-bot
        continue-on-error: true
        with:
          app-id: ${{ secrets.GH_APP_ID }}
          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}

      - name: Add deployment started comment
        id: deployment-started
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ steps.setup-bot.outputs.token }}
          script: |
            const { owner, repo } = context.repo;
            const prNumber = ${{ needs.check-pr.outputs.pr_number }};

            // Delete previous V2 deployment comments to avoid clutter
            const { data: comments } = await github.rest.issues.listComments({
              owner,
              repo,
              issue_number: prNumber,
              per_page: 100
            });

            const v2Comments = comments.filter(comment => 
              comment.body.includes('🚀 **Auto-deploying V2 version**') ||
              comment.body.includes('## 🚀 V2 Auto-Deployment Complete!') ||
              comment.body.includes('❌ **V2 Auto-deployment failed**')
            );

            for (const comment of v2Comments) {
              console.log(`Deleting old V2 comment: ${comment.id}`);
              await github.rest.issues.deleteComment({
                owner,
                repo,
                comment_id: comment.id
              });
            }

            // Create new deployment started comment
            const { data: newComment } = await github.rest.issues.createComment({
              owner,
              repo,
              issue_number: prNumber,
              body: `🚀 **Auto-deploying V2 version** for PR #${prNumber}...\n\n_This is an automated deployment for approved V2 contributors._\n\n⚠️ **Note:** If new commits are pushed during deployment, this build will be cancelled and replaced with the latest version.`
            });
            return newComment.id;

      - name: Checkout PR
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
        with:
          repository: ${{ needs.check-pr.outputs.pr_repository }}
          ref: ${{ needs.check-pr.outputs.pr_ref }}
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 0 # Fetch full history for commit hash detection

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0

      - name: Get version number
        id: versionNumber
        run: |
          VERSION=$(grep "^version =" build.gradle | awk -F'"' '{print $2}')
          echo "versionNumber=$VERSION" >> $GITHUB_OUTPUT

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

      - name: Get commit hash for app
        id: commit-hash
        run: |
          # Get last commit that touched the application code
          APP_HASH=$(git log -1 --format="%H" -- . 2>/dev/null || echo "")
          if [ -z "$APP_HASH" ]; then
            APP_HASH="no-changes"
          fi

          echo "App hash: $APP_HASH"
          echo "app_hash=$APP_HASH" >> $GITHUB_OUTPUT

          # Short hash for tags
          if [ "$APP_HASH" = "no-changes" ]; then
            echo "app_short=no-changes" >> $GITHUB_OUTPUT
          else
            echo "app_short=${APP_HASH:0:8}" >> $GITHUB_OUTPUT
          fi

      - name: Check if image exists
        id: check-image
        run: |
          if docker manifest inspect ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-${{ steps.commit-hash.outputs.app_short }} >/dev/null 2>&1; then
            echo "exists=true" >> $GITHUB_OUTPUT
            echo "Image already exists, skipping build"
          else
            echo "exists=false" >> $GITHUB_OUTPUT
            echo "Image needs to be built"
          fi

      - name: Build and push V2 image
        if: steps.check-image.outputs.exists == 'false'
        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
        with:
          context: .
          file: ./docker/embedded/Dockerfile
          push: true
          tags: ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-${{ steps.commit-hash.outputs.app_short }}
          build-args: VERSION_TAG=v2-alpha
          platforms: linux/amd64

      - name: Set up SSH
        run: |
          mkdir -p ~/.ssh/
          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
          sudo chmod 600 ../private.key

      - name: Deploy V2 to VPS
        id: deploy
        run: |
          # Use same port strategy as regular PRs - just the PR number
          V2_PORT=${{ needs.check-pr.outputs.pr_number }}

          # Create docker-compose for V2 with unified embedded image
          cat > docker-compose.yml << EOF
          version: '3.3'
          services:
            stirling-pdf-v2:
              container_name: stirling-pdf-v2-pr-${{ needs.check-pr.outputs.pr_number }}
              image: ${{ secrets.DOCKER_HUB_USERNAME }}/test:v2-${{ steps.commit-hash.outputs.app_short }}
              ports:
                - "${V2_PORT}:8080"
              volumes:
                - /stirling/V2-PR-${{ needs.check-pr.outputs.pr_number }}/data:/usr/share/tessdata:rw
                - /stirling/V2-PR-${{ needs.check-pr.outputs.pr_number }}/config:/configs:rw
                - /stirling/V2-PR-${{ needs.check-pr.outputs.pr_number }}/logs:/logs:rw
              environment:
                DISABLE_ADDITIONAL_FEATURES: "false"
                SECURITY_ENABLELOGIN: "true"
                SECURITY_INITIALLOGIN_USERNAME: "${{ secrets.TEST_LOGIN_USERNAME }}"
                SECURITY_INITIALLOGIN_PASSWORD: "${{ secrets.TEST_LOGIN_PASSWORD }}"
                SYSTEM_DEFAULTLOCALE: en-GB
                UI_APPNAME: "Stirling-PDF V2 PR#${{ needs.check-pr.outputs.pr_number }}"
                UI_HOMEDESCRIPTION: "V2 PR#${{ needs.check-pr.outputs.pr_number }} - Embedded Architecture"
                UI_APPNAMENAVBAR: "V2 PR#${{ needs.check-pr.outputs.pr_number }}"
                SYSTEM_MAXFILESIZE: "100"
                METRICS_ENABLED: "true"
                SYSTEM_GOOGLEVISIBILITY: "false"
                SWAGGER_SERVER_URL: "https://${V2_PORT}.ssl.stirlingpdf.cloud"
                baseUrl: "https://${V2_PORT}.ssl.stirlingpdf.cloud"
              restart: on-failure:5
          EOF

          # Deploy to VPS
          scp -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null docker-compose.yml ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }}:/tmp/docker-compose-v2.yml

          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << ENDSSH
            # Create V2 PR-specific directories
            mkdir -p /stirling/V2-PR-${{ needs.check-pr.outputs.pr_number }}/{data,config,logs}

            # Move docker-compose file to correct location
            mv /tmp/docker-compose-v2.yml /stirling/V2-PR-${{ needs.check-pr.outputs.pr_number }}/docker-compose.yml

            # Stop any existing container and clean up
            cd /stirling/V2-PR-${{ needs.check-pr.outputs.pr_number }}
            docker-compose down --remove-orphans 2>/dev/null || true

            # Start the new container
            docker-compose pull
            docker-compose up -d

            # Clean up unused Docker resources to save space
            docker system prune -af --volumes || true

            # Clean up old images (older than 2 weeks)
            docker image prune -af --filter "until=336h" --filter "label!=keep=true" || true
          ENDSSH

          # Set port for output
          echo "v2_port=${V2_PORT}" >> $GITHUB_OUTPUT

      - name: Post V2 deployment URL to PR
        if: success()
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ steps.setup-bot.outputs.token }}
          script: |
            const { owner, repo } = context.repo;
            const prNumber = ${{ needs.check-pr.outputs.pr_number }};
            const v2Port = ${{ steps.deploy.outputs.v2_port }};

            // Delete the "deploying..." comment since we're posting the final result
            const deploymentStartedId = ${{ steps.deployment-started.outputs.result }};
            if (deploymentStartedId) {
              console.log(`Deleting deployment started comment: ${deploymentStartedId}`);
              try {
                await github.rest.issues.deleteComment({
                  owner,
                  repo,
                  comment_id: deploymentStartedId
                });
              } catch (error) {
                console.log(`Could not delete deployment started comment: ${error.message}`);
              }
            }

            const deploymentUrl = `http://${{ secrets.NEW_VPS_HOST }}:${v2Port}`;
            const httpsUrl = `https://${v2Port}.ssl.stirlingpdf.cloud`;

            const commentBody = `## 🚀 V2 Auto-Deployment Complete!\n\n` +
                              `Your V2 PR with embedded architecture has been deployed!\n\n` +
                              `🔗 **Direct Test URL (non-SSL)** [${deploymentUrl}](${deploymentUrl})\n\n` +
                              `🔐 **Secure HTTPS URL**: [${httpsUrl}](${httpsUrl})\n\n` +
                              `_This deployment will be automatically cleaned up when the PR is closed._\n\n` +
                              `🔄 **Auto-deployed** for approved V2 contributors.`;

            await github.rest.issues.createComment({
              owner,
              repo,
              issue_number: prNumber,
              body: commentBody
            });

  cleanup-v2-deployment:
    if: github.event.action == 'closed'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      issues: write
      pull-requests: write

    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
        with:
          egress-policy: audit

      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1

      - name: Setup GitHub App Bot
        if: github.actor != 'dependabot[bot]'
        id: setup-bot
        uses: ./.github/actions/setup-bot
        continue-on-error: true
        with:
          app-id: ${{ secrets.GH_APP_ID }}
          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}

      - name: Clean up V2 deployment comments
        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
        with:
          github-token: ${{ steps.setup-bot.outputs.token }}
          script: |
            const { owner, repo } = context.repo;
            const prNumber = ${{ github.event.pull_request.number }};

            // Find and delete V2 deployment comments
            const { data: comments } = await github.rest.issues.listComments({
              owner,
              repo,
              issue_number: prNumber
            });

            const v2Comments = comments.filter(c =>
              c.body?.includes("## 🚀 V2 Auto-Deployment Complete!") &&
              c.user?.type === "Bot"
            );

            for (const comment of v2Comments) {
              await github.rest.issues.deleteComment({
                owner,
                repo,
                comment_id: comment.id
              });
              console.log(`Deleted V2 deployment comment (ID: ${comment.id})`);
            }

      - name: Set up SSH
        run: |
          mkdir -p ~/.ssh/
          echo "${{ secrets.NEW_VPS_SSH_KEY }}" > ../private.key
          sudo chmod 600 ../private.key

      - name: Cleanup V2 deployment
        run: |
          ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${{ secrets.NEW_VPS_USERNAME }}@${{ secrets.NEW_VPS_HOST }} << 'ENDSSH'
            if [ -d "/stirling/V2-PR-${{ github.event.pull_request.number }}" ]; then
              echo "Found V2 PR directory, proceeding with cleanup..."

              # Stop and remove V2 containers
              cd /stirling/V2-PR-${{ github.event.pull_request.number }}
              docker-compose down || true

              # Go back to root before removal
              cd /

              # Remove V2 PR-specific directories
              rm -rf /stirling/V2-PR-${{ github.event.pull_request.number }}

              # Clean up V2 container by name (in case compose cleanup missed it)
              docker rm -f stirling-pdf-v2-pr-${{ github.event.pull_request.number }} || true

              echo "V2 cleanup completed"
            else
              echo "V2 PR directory not found, nothing to clean up"
            fi
            
            # Clean up old unused images (older than 2 weeks) but keep recent ones for reuse
            docker image prune -af --filter "until=336h" --filter "label!=keep=true" || true

            # Note: We don't remove the commit-based images since they can be reused across PRs
            # Only remove PR-specific containers and directories
          ENDSSH

      - name: Cleanup temporary files
        if: always()
        run: |
          rm -f ../private.key
        continue-on-error: true