name: CI

on:
  push:
  pull_request:

env:
  REGISTRY_IMAGE: registry.neko-piranha.ts.net/astral/buzz-sheet
  DEPLOY_NAMESPACE: buzz-sheet
  KUBE_API_SERVER: https://100.112.189.33:6443/

jobs:
  verify:
    name: Verify
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Set up Bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: 1.3.14

      - name: Install dependencies
        run: bun install --frozen-lockfile

      - name: Run unit and integration tests
        env:
          REDIS_INTEGRATION_URL: ${{ secrets.REDIS_INTEGRATION_URL }}
        run: bun run test

      - name: Generate route types and check TypeScript
        run: bun run typecheck

      - name: Lint
        run: bun run lint

      - name: Set up kubectl
        uses: azure/setup-kubectl@v4

      - name: Validate Kubernetes manifests
        run: kubectl kustomize k8s/ >/dev/null

  build-and-deploy:
    name: Build immutable images and deploy
    needs: verify
    if: >-
      gitea.event_name == 'push' &&
      gitea.ref == 'refs/heads/main' &&
      vars.DEPLOY_ENABLED == 'true'
    runs-on: ubuntu-latest
    timeout-minutes: 45
    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Build and push application image
        run: |
          docker build \
            --target app \
            --build-arg NEXT_DEPLOYMENT_ID=${{ gitea.sha }} \
            --build-arg VCS_REF=${{ gitea.sha }} \
            --tag ${{ env.REGISTRY_IMAGE }}:${{ gitea.sha }} \
            .
          docker push ${{ env.REGISTRY_IMAGE }}:${{ gitea.sha }}

      - name: Build and push migration image
        run: |
          docker build \
            --target migration \
            --build-arg VCS_REF=${{ gitea.sha }} \
            --tag ${{ env.REGISTRY_IMAGE }}:migrate-${{ gitea.sha }} \
            .
          docker push ${{ env.REGISTRY_IMAGE }}:migrate-${{ gitea.sha }}

      - name: Set up kubectl
        uses: azure/setup-kubectl@v4

      - name: Configure kubectl
        env:
          KUBE_CONFIG_B64: ${{ secrets.KUBE_CONFIG_B64 }}
        run: |
          if [ -z "$KUBE_CONFIG_B64" ]; then
            echo "Missing KUBE_CONFIG_B64 secret for the CI deploy identity" >&2
            exit 1
          fi

          kube_dir="$RUNNER_TEMP/buzz-sheet-kube"
          mkdir -p "$kube_dir"
          chmod 700 "$kube_dir"
          export KUBECONFIG="$kube_dir/config"
          printf '%s' "$KUBE_CONFIG_B64" | base64 --decode >"$KUBECONFIG"
          chmod 600 "$KUBECONFIG"
          cluster_name="$(kubectl config view --kubeconfig "$KUBECONFIG" --minify -o jsonpath='{.clusters[0].name}')"
          kubectl config set-cluster "$cluster_name" \
            --kubeconfig "$KUBECONFIG" \
            --server "$KUBE_API_SERVER" \
            --insecure-skip-tls-verify=true >/dev/null

          env_file="${GITEA_ENV_FILE:-${GITHUB_ENV:-}}"
          if [ -n "$env_file" ]; then
            printf '%s\n' "KUBECONFIG=$KUBECONFIG" >> "$env_file"
          fi

      - name: Migrate, then roll out the immutable revision
        env:
          REVISION: ${{ gitea.sha }}
          KUBE_CONFIG_B64: ${{ secrets.KUBE_CONFIG_B64 }}
        shell: bash
        run: |
          set -Eeuo pipefail

          if [ -z "$KUBE_CONFIG_B64" ]; then
            echo "Missing KUBE_CONFIG_B64 secret for the CI deploy identity" >&2
            exit 1
          fi

          kube_dir="$RUNNER_TEMP/buzz-sheet-kube"
          mkdir -p "$kube_dir"
          chmod 700 "$kube_dir"
          export KUBECONFIG="$kube_dir/config"
          if ! printf '%s' "$KUBE_CONFIG_B64" | base64 --decode >"$KUBECONFIG"; then
            echo "KUBE_CONFIG_B64 is not valid base64" >&2
            exit 1
          fi
          chmod 600 "$KUBECONFIG"
          if [ ! -s "$KUBECONFIG" ]; then
            echo "KUBE_CONFIG_B64 decoded to an empty kubeconfig" >&2
            exit 1
          fi
          cluster_name="$(kubectl config view --kubeconfig "$KUBECONFIG" --minify -o jsonpath='{.clusters[0].name}')"
          if [ -z "$cluster_name" ]; then
            echo "Decoded kubeconfig has no active cluster" >&2
            exit 1
          fi
          kubectl config set-cluster "$cluster_name" \
            --kubeconfig "$KUBECONFIG" \
            --server "$KUBE_API_SERVER" \
            --insecure-skip-tls-verify=true >/dev/null

          revision_short="${REVISION:0:12}"
          migration_dir="$RUNNER_TEMP/buzz-sheet-migration-$revision_short"
          migration_manifest="$RUNNER_TEMP/buzz-sheet-migration-$revision_short.yaml"
          cp -R k8s/migration "$migration_dir"
          sed -i "s#newName: .*#newName: $REGISTRY_IMAGE#" "$migration_dir/kustomization.yaml"
          sed -i "s/newTag: .*/newTag: migrate-$REVISION/" "$migration_dir/kustomization.yaml"
          kubectl kustomize "$migration_dir" >"$migration_manifest"

          kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" delete job buzz-sheet-migrate --ignore-not-found
          migration_resource="$(kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" create --validate=false -f "$migration_manifest" -o name)"
          if ! kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" wait \
            --for=condition=complete \
            --timeout=10m \
            "$migration_resource"; then
            kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" logs "$migration_resource" --all-containers=true || true
            exit 1
          fi

          kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" patch configmap buzz-sheet-config \
            --type=merge \
            --patch "{\"data\":{\"NEXT_DEPLOYMENT_ID\":\"$REVISION\"}}"
          kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" set image \
            deployment/buzz-sheet \
            app="$REGISTRY_IMAGE:$REVISION"
          kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" set image \
            deployment/buzz-sheet-worker \
            worker="$REGISTRY_IMAGE:$REVISION"
          kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" set image \
            deployment/buzz-sheet-discord-worker \
            discord-worker="$REGISTRY_IMAGE:$REVISION"
          kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" rollout status \
            deployment/buzz-sheet \
            --timeout=10m
          kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" rollout status \
            deployment/buzz-sheet-worker \
            --timeout=10m
          kubectl --kubeconfig "$KUBECONFIG" --namespace "$DEPLOY_NAMESPACE" rollout status \
            deployment/buzz-sheet-discord-worker \
            --timeout=10m