name: Build & Deploy Hermy HQ (Nix + Attic)

on:
  push:
    branches: [main]
  workflow_dispatch:

concurrency:
  group: hermyhq-deploy
  cancel-in-progress: false

permissions:
  contents: read
  id-token: write

env:
  VPS_HOST: ${{ secrets.VPS_HOST }}
  VPS_USER: ${{ secrets.VPS_USER }}

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    timeout-minutes: 60
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          fetch-depth: 0

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@v22
        with:
          determinate: false
          extra-conf: |
            sandbox = false
            accept-flake-config = true
            extra-substituters = https://attic.asepharyana.my.id/asepharyana
            extra-trusted-public-keys = asepharyana:zBpY6vNI1nDJ4mU6W4q880BB0JB1qb3gRKkO/tGSMiQ=

      - name: Cache Nix
        uses: DeterminateSystems/magic-nix-cache-action@v14
        with:
          use-flakehub: false

      - name: Build hermyhq
        id: build
        run: |
          nix build .#hermyhq --impure --option sandbox false --print-build-logs
          STORE_PATH=$(readlink result)
          echo "store-path=$STORE_PATH" >> "$GITHUB_OUTPUT"
          echo "Build OK hermyhq: $STORE_PATH"

      - name: Push to Attic cache
        env:
          ATTIC_TOKEN: ${{ secrets.ATTIC_TOKEN }}
        run: |
          if [ -z "$ATTIC_TOKEN" ]; then
            echo "ATTIC_TOKEN not set; skipping attic push"
            exit 0
          fi
          STORE_PATH="${{ steps.build.outputs.store-path }}"
          ATTIC_DIR="/nix/store/fygyy3yk4rqdknxkiwkqambpnhyax0k4-attic-0.1.0"
          ATTIC_BIN=""
          if command -v attic >/dev/null 2>&1; then
            ATTIC_BIN="$(command -v attic)"
          elif nix-store --realise "$ATTIC_DIR" 2>/tmp/attic-bootstrap.err; then
            echo "✅ Pulled attic client from attic cache (HTTPS substituter)"
            ATTIC_BIN="$ATTIC_DIR/bin/attic"
          else
            echo "attic client unavailable on runner; skipping push (VPS will fall back)"
            exit 0
          fi
          mkdir -p "$HOME/.config/attic"
          cat > "$HOME/.config/attic/config.toml" <<CONF
          default-server = "pub"

          [servers.pub]
          endpoint = "https://attic.asepharyana.my.id"
          token = "$ATTIC_TOKEN"
          CONF
          push_ok=""
          for attempt in 1 2 3; do
            if "$ATTIC_BIN" push pub:asepharyana "$STORE_PATH" --jobs 4 --ignore-upstream-cache-filter; then
              echo "✅ Pushed $STORE_PATH to attic directly from runner"
              push_ok=1
              break
            fi
            echo "⚠️ Direct attic push attempt $attempt/3 failed; retrying in 10s..."
            sleep 10
          done
          if [ -z "$push_ok" ]; then
            echo "⚠️ Direct attic push failed after 3 attempts (VPS will try nix-store --realise then ssh copy)"
          fi

      - name: Setup SSH key
        env:
          SSH_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
        run: |
          mkdir -p ~/.ssh
          echo "$SSH_KEY" > ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          sed -i 's/\r$//' ~/.ssh/id_ed25519
          ssh-keygen -y -f ~/.ssh/id_ed25519 >/dev/null 2>&1 || { echo "SSH key invalid"; exit 1; }
          ssh-keyscan -H "$VPS_HOST" >> ~/.ssh/known_hosts 2>/dev/null

      - name: Deploy hermyhq to VPS
        run: |
          STORE_PATH="${{ steps.build.outputs.store-path }}"
          echo "=== Realising hermyhq: $STORE_PATH (substitute from attic, fallback ssh copy) ==="
          if ssh "$VPS_USER@$VPS_HOST" "sudo /nix/var/nix/profiles/default/bin/nix-store --realise '$STORE_PATH'" 2>/dev/null; then
            echo "Substituted hermyhq from Attic cache"
          else
            echo "Attic substitute failed; falling back to ssh copy"
            nix copy --to "ssh://$VPS_USER@$VPS_HOST" "$STORE_PATH"
          fi

          echo "=== Updating profile ==="
          ssh "$VPS_USER@$VPS_HOST" "sudo /nix/var/nix/profiles/default/bin/nix-env --profile /nix/var/nix/profiles/hermyhq --set '$STORE_PATH'"

          echo "=== Restarting service ==="
          ssh "$VPS_USER@$VPS_HOST" \
            "sudo systemctl daemon-reload && sudo systemctl restart hermyhq && for i in \$(seq 1 15); do state=\$(sudo systemctl is-active hermyhq 2>/dev/null || echo inactive); [ \"\$state\" = \"active\" ] && break; sleep 2; done; echo \"final-state=\$state\"; [ \"\$state\" = \"active\" ]"
          echo "✅ hermyhq deployed"

  cleanup:
    needs: build-and-deploy
    if: always()
    runs-on: ubuntu-latest
    steps:
      - name: Nix GC on VPS
        env:
          VPS_HOST: ${{ secrets.VPS_HOST }}
          VPS_USER: ${{ secrets.VPS_USER }}
          SSH_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
        run: |
          mkdir -p ~/.ssh
          echo "$SSH_KEY" > ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          ssh-keyscan -H "$VPS_HOST" >> ~/.ssh/known_hosts 2>/dev/null
          ssh "$VPS_USER@$VPS_HOST" "sudo /usr/local/bin/nix-gc-vps.sh" || echo "⚠️ Nix GC gagal (non-fatal)"